xref: /linux/drivers/hid/hid-nintendo.c (revision 3df692169e8486fc3dd91fcd5ea81c27a0bac033)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * HID driver for Nintendo Switch Joy-Cons and Pro Controllers
4  *
5  * Copyright (c) 2019-2021 Daniel J. Ogorchock <djogorchock@gmail.com>
6  *
7  * The following resources/projects were referenced for this driver:
8  *   https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering
9  *   https://gitlab.com/pjranki/joycon-linux-kernel (Peter Rankin)
10  *   https://github.com/FrotBot/SwitchProConLinuxUSB
11  *   https://github.com/MTCKC/ProconXInput
12  *   https://github.com/Davidobot/BetterJoyForCemu
13  *   hid-wiimote kernel hid driver
14  *   hid-logitech-hidpp driver
15  *   hid-sony driver
16  *
17  * This driver supports the Nintendo Switch Joy-Cons and Pro Controllers. The
18  * Pro Controllers can either be used over USB or Bluetooth.
19  *
20  * The driver will retrieve the factory calibration info from the controllers,
21  * so little to no user calibration should be required.
22  *
23  */
24 
25 #include "hid-ids.h"
26 #include <asm/unaligned.h>
27 #include <linux/delay.h>
28 #include <linux/device.h>
29 #include <linux/kernel.h>
30 #include <linux/hid.h>
31 #include <linux/input.h>
32 #include <linux/jiffies.h>
33 #include <linux/leds.h>
34 #include <linux/module.h>
35 #include <linux/power_supply.h>
36 #include <linux/spinlock.h>
37 
38 /*
39  * Reference the url below for the following HID report defines:
40  * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering
41  */
42 
43 /* Output Reports */
44 #define JC_OUTPUT_RUMBLE_AND_SUBCMD	 0x01
45 #define JC_OUTPUT_FW_UPDATE_PKT		 0x03
46 #define JC_OUTPUT_RUMBLE_ONLY		 0x10
47 #define JC_OUTPUT_MCU_DATA		 0x11
48 #define JC_OUTPUT_USB_CMD		 0x80
49 
50 /* Subcommand IDs */
51 #define JC_SUBCMD_STATE			 0x00
52 #define JC_SUBCMD_MANUAL_BT_PAIRING	 0x01
53 #define JC_SUBCMD_REQ_DEV_INFO		 0x02
54 #define JC_SUBCMD_SET_REPORT_MODE	 0x03
55 #define JC_SUBCMD_TRIGGERS_ELAPSED	 0x04
56 #define JC_SUBCMD_GET_PAGE_LIST_STATE	 0x05
57 #define JC_SUBCMD_SET_HCI_STATE		 0x06
58 #define JC_SUBCMD_RESET_PAIRING_INFO	 0x07
59 #define JC_SUBCMD_LOW_POWER_MODE	 0x08
60 #define JC_SUBCMD_SPI_FLASH_READ	 0x10
61 #define JC_SUBCMD_SPI_FLASH_WRITE	 0x11
62 #define JC_SUBCMD_RESET_MCU		 0x20
63 #define JC_SUBCMD_SET_MCU_CONFIG	 0x21
64 #define JC_SUBCMD_SET_MCU_STATE		 0x22
65 #define JC_SUBCMD_SET_PLAYER_LIGHTS	 0x30
66 #define JC_SUBCMD_GET_PLAYER_LIGHTS	 0x31
67 #define JC_SUBCMD_SET_HOME_LIGHT	 0x38
68 #define JC_SUBCMD_ENABLE_IMU		 0x40
69 #define JC_SUBCMD_SET_IMU_SENSITIVITY	 0x41
70 #define JC_SUBCMD_WRITE_IMU_REG		 0x42
71 #define JC_SUBCMD_READ_IMU_REG		 0x43
72 #define JC_SUBCMD_ENABLE_VIBRATION	 0x48
73 #define JC_SUBCMD_GET_REGULATED_VOLTAGE	 0x50
74 
75 /* Input Reports */
76 #define JC_INPUT_BUTTON_EVENT		 0x3F
77 #define JC_INPUT_SUBCMD_REPLY		 0x21
78 #define JC_INPUT_IMU_DATA		 0x30
79 #define JC_INPUT_MCU_DATA		 0x31
80 #define JC_INPUT_USB_RESPONSE		 0x81
81 
82 /* Feature Reports */
83 #define JC_FEATURE_LAST_SUBCMD		 0x02
84 #define JC_FEATURE_OTA_FW_UPGRADE	 0x70
85 #define JC_FEATURE_SETUP_MEM_READ	 0x71
86 #define JC_FEATURE_MEM_READ		 0x72
87 #define JC_FEATURE_ERASE_MEM_SECTOR	 0x73
88 #define JC_FEATURE_MEM_WRITE		 0x74
89 #define JC_FEATURE_LAUNCH		 0x75
90 
91 /* USB Commands */
92 #define JC_USB_CMD_CONN_STATUS		 0x01
93 #define JC_USB_CMD_HANDSHAKE		 0x02
94 #define JC_USB_CMD_BAUDRATE_3M		 0x03
95 #define JC_USB_CMD_NO_TIMEOUT		 0x04
96 #define JC_USB_CMD_EN_TIMEOUT		 0x05
97 #define JC_USB_RESET			 0x06
98 #define JC_USB_PRE_HANDSHAKE		 0x91
99 #define JC_USB_SEND_UART		 0x92
100 
101 /* Magic value denoting presence of user calibration */
102 #define JC_CAL_USR_MAGIC_0		 0xB2
103 #define JC_CAL_USR_MAGIC_1		 0xA1
104 #define JC_CAL_USR_MAGIC_SIZE		 2
105 
106 /* SPI storage addresses of user calibration data */
107 #define JC_CAL_USR_LEFT_MAGIC_ADDR	 0x8010
108 #define JC_CAL_USR_LEFT_DATA_ADDR	 0x8012
109 #define JC_CAL_USR_LEFT_DATA_END	 0x801A
110 #define JC_CAL_USR_RIGHT_MAGIC_ADDR	 0x801B
111 #define JC_CAL_USR_RIGHT_DATA_ADDR	 0x801D
112 #define JC_CAL_STICK_DATA_SIZE \
113 	(JC_CAL_USR_LEFT_DATA_END - JC_CAL_USR_LEFT_DATA_ADDR + 1)
114 
115 /* SPI storage addresses of factory calibration data */
116 #define JC_CAL_FCT_DATA_LEFT_ADDR	 0x603d
117 #define JC_CAL_FCT_DATA_RIGHT_ADDR	 0x6046
118 
119 /* SPI storage addresses of IMU factory calibration data */
120 #define JC_IMU_CAL_FCT_DATA_ADDR	 0x6020
121 #define JC_IMU_CAL_FCT_DATA_END	 0x6037
122 #define JC_IMU_CAL_DATA_SIZE \
123 	(JC_IMU_CAL_FCT_DATA_END - JC_IMU_CAL_FCT_DATA_ADDR + 1)
124 /* SPI storage addresses of IMU user calibration data */
125 #define JC_IMU_CAL_USR_MAGIC_ADDR	 0x8026
126 #define JC_IMU_CAL_USR_DATA_ADDR	 0x8028
127 
128 /* The raw analog joystick values will be mapped in terms of this magnitude */
129 #define JC_MAX_STICK_MAG		 32767
130 #define JC_STICK_FUZZ			 250
131 #define JC_STICK_FLAT			 500
132 
133 /* Hat values for pro controller's d-pad */
134 #define JC_MAX_DPAD_MAG		1
135 #define JC_DPAD_FUZZ		0
136 #define JC_DPAD_FLAT		0
137 
138 /* Under most circumstances IMU reports are pushed every 15ms; use as default */
139 #define JC_IMU_DFLT_AVG_DELTA_MS	15
140 /* How many samples to sum before calculating average IMU report delta */
141 #define JC_IMU_SAMPLES_PER_DELTA_AVG	300
142 /* Controls how many dropped IMU packets at once trigger a warning message */
143 #define JC_IMU_DROPPED_PKT_WARNING	3
144 
145 /*
146  * The controller's accelerometer has a sensor resolution of 16bits and is
147  * configured with a range of +-8000 milliGs. Therefore, the resolution can be
148  * calculated thus: (2^16-1)/(8000 * 2) = 4.096 digits per milliG
149  * Resolution per G (rather than per millliG): 4.096 * 1000 = 4096 digits per G
150  * Alternatively: 1/4096 = .0002441 Gs per digit
151  */
152 #define JC_IMU_MAX_ACCEL_MAG		32767
153 #define JC_IMU_ACCEL_RES_PER_G		4096
154 #define JC_IMU_ACCEL_FUZZ		10
155 #define JC_IMU_ACCEL_FLAT		0
156 
157 /*
158  * The controller's gyroscope has a sensor resolution of 16bits and is
159  * configured with a range of +-2000 degrees/second.
160  * Digits per dps: (2^16 -1)/(2000*2) = 16.38375
161  * dps per digit: 16.38375E-1 = .0610
162  *
163  * STMicro recommends in the datasheet to add 15% to the dps/digit. This allows
164  * the full sensitivity range to be saturated without clipping. This yields more
165  * accurate results, so it's the technique this driver uses.
166  * dps per digit (corrected): .0610 * 1.15 = .0702
167  * digits per dps (corrected): .0702E-1 = 14.247
168  *
169  * Now, 14.247 truncating to 14 loses a lot of precision, so we rescale the
170  * min/max range by 1000.
171  */
172 #define JC_IMU_PREC_RANGE_SCALE	1000
173 /* Note: change mag and res_per_dps if prec_range_scale is ever altered */
174 #define JC_IMU_MAX_GYRO_MAG		32767000 /* (2^16-1)*1000 */
175 #define JC_IMU_GYRO_RES_PER_DPS		14247 /* (14.247*1000) */
176 #define JC_IMU_GYRO_FUZZ		10
177 #define JC_IMU_GYRO_FLAT		0
178 
179 /* frequency/amplitude tables for rumble */
180 struct joycon_rumble_freq_data {
181 	u16 high;
182 	u8 low;
183 	u16 freq; /* Hz*/
184 };
185 
186 struct joycon_rumble_amp_data {
187 	u8 high;
188 	u16 low;
189 	u16 amp;
190 };
191 
192 #if IS_ENABLED(CONFIG_NINTENDO_FF)
193 /*
194  * These tables are from
195  * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering/blob/master/rumble_data_table.md
196  */
197 static const struct joycon_rumble_freq_data joycon_rumble_frequencies[] = {
198 	/* high, low, freq */
199 	{ 0x0000, 0x01,   41 }, { 0x0000, 0x02,   42 }, { 0x0000, 0x03,   43 },
200 	{ 0x0000, 0x04,   44 }, { 0x0000, 0x05,   45 }, { 0x0000, 0x06,   46 },
201 	{ 0x0000, 0x07,   47 }, { 0x0000, 0x08,   48 }, { 0x0000, 0x09,   49 },
202 	{ 0x0000, 0x0A,   50 }, { 0x0000, 0x0B,   51 }, { 0x0000, 0x0C,   52 },
203 	{ 0x0000, 0x0D,   53 }, { 0x0000, 0x0E,   54 }, { 0x0000, 0x0F,   55 },
204 	{ 0x0000, 0x10,   57 }, { 0x0000, 0x11,   58 }, { 0x0000, 0x12,   59 },
205 	{ 0x0000, 0x13,   60 }, { 0x0000, 0x14,   62 }, { 0x0000, 0x15,   63 },
206 	{ 0x0000, 0x16,   64 }, { 0x0000, 0x17,   66 }, { 0x0000, 0x18,   67 },
207 	{ 0x0000, 0x19,   69 }, { 0x0000, 0x1A,   70 }, { 0x0000, 0x1B,   72 },
208 	{ 0x0000, 0x1C,   73 }, { 0x0000, 0x1D,   75 }, { 0x0000, 0x1e,   77 },
209 	{ 0x0000, 0x1f,   78 }, { 0x0000, 0x20,   80 }, { 0x0400, 0x21,   82 },
210 	{ 0x0800, 0x22,   84 }, { 0x0c00, 0x23,   85 }, { 0x1000, 0x24,   87 },
211 	{ 0x1400, 0x25,   89 }, { 0x1800, 0x26,   91 }, { 0x1c00, 0x27,   93 },
212 	{ 0x2000, 0x28,   95 }, { 0x2400, 0x29,   97 }, { 0x2800, 0x2a,   99 },
213 	{ 0x2c00, 0x2b,  102 }, { 0x3000, 0x2c,  104 }, { 0x3400, 0x2d,  106 },
214 	{ 0x3800, 0x2e,  108 }, { 0x3c00, 0x2f,  111 }, { 0x4000, 0x30,  113 },
215 	{ 0x4400, 0x31,  116 }, { 0x4800, 0x32,  118 }, { 0x4c00, 0x33,  121 },
216 	{ 0x5000, 0x34,  123 }, { 0x5400, 0x35,  126 }, { 0x5800, 0x36,  129 },
217 	{ 0x5c00, 0x37,  132 }, { 0x6000, 0x38,  135 }, { 0x6400, 0x39,  137 },
218 	{ 0x6800, 0x3a,  141 }, { 0x6c00, 0x3b,  144 }, { 0x7000, 0x3c,  147 },
219 	{ 0x7400, 0x3d,  150 }, { 0x7800, 0x3e,  153 }, { 0x7c00, 0x3f,  157 },
220 	{ 0x8000, 0x40,  160 }, { 0x8400, 0x41,  164 }, { 0x8800, 0x42,  167 },
221 	{ 0x8c00, 0x43,  171 }, { 0x9000, 0x44,  174 }, { 0x9400, 0x45,  178 },
222 	{ 0x9800, 0x46,  182 }, { 0x9c00, 0x47,  186 }, { 0xa000, 0x48,  190 },
223 	{ 0xa400, 0x49,  194 }, { 0xa800, 0x4a,  199 }, { 0xac00, 0x4b,  203 },
224 	{ 0xb000, 0x4c,  207 }, { 0xb400, 0x4d,  212 }, { 0xb800, 0x4e,  217 },
225 	{ 0xbc00, 0x4f,  221 }, { 0xc000, 0x50,  226 }, { 0xc400, 0x51,  231 },
226 	{ 0xc800, 0x52,  236 }, { 0xcc00, 0x53,  241 }, { 0xd000, 0x54,  247 },
227 	{ 0xd400, 0x55,  252 }, { 0xd800, 0x56,  258 }, { 0xdc00, 0x57,  263 },
228 	{ 0xe000, 0x58,  269 }, { 0xe400, 0x59,  275 }, { 0xe800, 0x5a,  281 },
229 	{ 0xec00, 0x5b,  287 }, { 0xf000, 0x5c,  293 }, { 0xf400, 0x5d,  300 },
230 	{ 0xf800, 0x5e,  306 }, { 0xfc00, 0x5f,  313 }, { 0x0001, 0x60,  320 },
231 	{ 0x0401, 0x61,  327 }, { 0x0801, 0x62,  334 }, { 0x0c01, 0x63,  341 },
232 	{ 0x1001, 0x64,  349 }, { 0x1401, 0x65,  357 }, { 0x1801, 0x66,  364 },
233 	{ 0x1c01, 0x67,  372 }, { 0x2001, 0x68,  381 }, { 0x2401, 0x69,  389 },
234 	{ 0x2801, 0x6a,  397 }, { 0x2c01, 0x6b,  406 }, { 0x3001, 0x6c,  415 },
235 	{ 0x3401, 0x6d,  424 }, { 0x3801, 0x6e,  433 }, { 0x3c01, 0x6f,  443 },
236 	{ 0x4001, 0x70,  453 }, { 0x4401, 0x71,  462 }, { 0x4801, 0x72,  473 },
237 	{ 0x4c01, 0x73,  483 }, { 0x5001, 0x74,  494 }, { 0x5401, 0x75,  504 },
238 	{ 0x5801, 0x76,  515 }, { 0x5c01, 0x77,  527 }, { 0x6001, 0x78,  538 },
239 	{ 0x6401, 0x79,  550 }, { 0x6801, 0x7a,  562 }, { 0x6c01, 0x7b,  574 },
240 	{ 0x7001, 0x7c,  587 }, { 0x7401, 0x7d,  600 }, { 0x7801, 0x7e,  613 },
241 	{ 0x7c01, 0x7f,  626 }, { 0x8001, 0x00,  640 }, { 0x8401, 0x00,  654 },
242 	{ 0x8801, 0x00,  668 }, { 0x8c01, 0x00,  683 }, { 0x9001, 0x00,  698 },
243 	{ 0x9401, 0x00,  713 }, { 0x9801, 0x00,  729 }, { 0x9c01, 0x00,  745 },
244 	{ 0xa001, 0x00,  761 }, { 0xa401, 0x00,  778 }, { 0xa801, 0x00,  795 },
245 	{ 0xac01, 0x00,  812 }, { 0xb001, 0x00,  830 }, { 0xb401, 0x00,  848 },
246 	{ 0xb801, 0x00,  867 }, { 0xbc01, 0x00,  886 }, { 0xc001, 0x00,  905 },
247 	{ 0xc401, 0x00,  925 }, { 0xc801, 0x00,  945 }, { 0xcc01, 0x00,  966 },
248 	{ 0xd001, 0x00,  987 }, { 0xd401, 0x00, 1009 }, { 0xd801, 0x00, 1031 },
249 	{ 0xdc01, 0x00, 1053 }, { 0xe001, 0x00, 1076 }, { 0xe401, 0x00, 1100 },
250 	{ 0xe801, 0x00, 1124 }, { 0xec01, 0x00, 1149 }, { 0xf001, 0x00, 1174 },
251 	{ 0xf401, 0x00, 1199 }, { 0xf801, 0x00, 1226 }, { 0xfc01, 0x00, 1253 }
252 };
253 
254 #define joycon_max_rumble_amp	(1003)
255 static const struct joycon_rumble_amp_data joycon_rumble_amplitudes[] = {
256 	/* high, low, amp */
257 	{ 0x00, 0x0040,    0 },
258 	{ 0x02, 0x8040,   10 }, { 0x04, 0x0041,   12 }, { 0x06, 0x8041,   14 },
259 	{ 0x08, 0x0042,   17 }, { 0x0a, 0x8042,   20 }, { 0x0c, 0x0043,   24 },
260 	{ 0x0e, 0x8043,   28 }, { 0x10, 0x0044,   33 }, { 0x12, 0x8044,   40 },
261 	{ 0x14, 0x0045,   47 }, { 0x16, 0x8045,   56 }, { 0x18, 0x0046,   67 },
262 	{ 0x1a, 0x8046,   80 }, { 0x1c, 0x0047,   95 }, { 0x1e, 0x8047,  112 },
263 	{ 0x20, 0x0048,  117 }, { 0x22, 0x8048,  123 }, { 0x24, 0x0049,  128 },
264 	{ 0x26, 0x8049,  134 }, { 0x28, 0x004a,  140 }, { 0x2a, 0x804a,  146 },
265 	{ 0x2c, 0x004b,  152 }, { 0x2e, 0x804b,  159 }, { 0x30, 0x004c,  166 },
266 	{ 0x32, 0x804c,  173 }, { 0x34, 0x004d,  181 }, { 0x36, 0x804d,  189 },
267 	{ 0x38, 0x004e,  198 }, { 0x3a, 0x804e,  206 }, { 0x3c, 0x004f,  215 },
268 	{ 0x3e, 0x804f,  225 }, { 0x40, 0x0050,  230 }, { 0x42, 0x8050,  235 },
269 	{ 0x44, 0x0051,  240 }, { 0x46, 0x8051,  245 }, { 0x48, 0x0052,  251 },
270 	{ 0x4a, 0x8052,  256 }, { 0x4c, 0x0053,  262 }, { 0x4e, 0x8053,  268 },
271 	{ 0x50, 0x0054,  273 }, { 0x52, 0x8054,  279 }, { 0x54, 0x0055,  286 },
272 	{ 0x56, 0x8055,  292 }, { 0x58, 0x0056,  298 }, { 0x5a, 0x8056,  305 },
273 	{ 0x5c, 0x0057,  311 }, { 0x5e, 0x8057,  318 }, { 0x60, 0x0058,  325 },
274 	{ 0x62, 0x8058,  332 }, { 0x64, 0x0059,  340 }, { 0x66, 0x8059,  347 },
275 	{ 0x68, 0x005a,  355 }, { 0x6a, 0x805a,  362 }, { 0x6c, 0x005b,  370 },
276 	{ 0x6e, 0x805b,  378 }, { 0x70, 0x005c,  387 }, { 0x72, 0x805c,  395 },
277 	{ 0x74, 0x005d,  404 }, { 0x76, 0x805d,  413 }, { 0x78, 0x005e,  422 },
278 	{ 0x7a, 0x805e,  431 }, { 0x7c, 0x005f,  440 }, { 0x7e, 0x805f,  450 },
279 	{ 0x80, 0x0060,  460 }, { 0x82, 0x8060,  470 }, { 0x84, 0x0061,  480 },
280 	{ 0x86, 0x8061,  491 }, { 0x88, 0x0062,  501 }, { 0x8a, 0x8062,  512 },
281 	{ 0x8c, 0x0063,  524 }, { 0x8e, 0x8063,  535 }, { 0x90, 0x0064,  547 },
282 	{ 0x92, 0x8064,  559 }, { 0x94, 0x0065,  571 }, { 0x96, 0x8065,  584 },
283 	{ 0x98, 0x0066,  596 }, { 0x9a, 0x8066,  609 }, { 0x9c, 0x0067,  623 },
284 	{ 0x9e, 0x8067,  636 }, { 0xa0, 0x0068,  650 }, { 0xa2, 0x8068,  665 },
285 	{ 0xa4, 0x0069,  679 }, { 0xa6, 0x8069,  694 }, { 0xa8, 0x006a,  709 },
286 	{ 0xaa, 0x806a,  725 }, { 0xac, 0x006b,  741 }, { 0xae, 0x806b,  757 },
287 	{ 0xb0, 0x006c,  773 }, { 0xb2, 0x806c,  790 }, { 0xb4, 0x006d,  808 },
288 	{ 0xb6, 0x806d,  825 }, { 0xb8, 0x006e,  843 }, { 0xba, 0x806e,  862 },
289 	{ 0xbc, 0x006f,  881 }, { 0xbe, 0x806f,  900 }, { 0xc0, 0x0070,  920 },
290 	{ 0xc2, 0x8070,  940 }, { 0xc4, 0x0071,  960 }, { 0xc6, 0x8071,  981 },
291 	{ 0xc8, 0x0072, joycon_max_rumble_amp }
292 };
293 static const u16 JC_RUMBLE_DFLT_LOW_FREQ = 160;
294 static const u16 JC_RUMBLE_DFLT_HIGH_FREQ = 320;
295 static const unsigned short JC_RUMBLE_ZERO_AMP_PKT_CNT = 5;
296 #endif /* IS_ENABLED(CONFIG_NINTENDO_FF) */
297 static const u16 JC_RUMBLE_PERIOD_MS = 50;
298 
299 /* States for controller state machine */
300 enum joycon_ctlr_state {
301 	JOYCON_CTLR_STATE_INIT,
302 	JOYCON_CTLR_STATE_READ,
303 	JOYCON_CTLR_STATE_REMOVED,
304 };
305 
306 /* Controller type received as part of device info */
307 enum joycon_ctlr_type {
308 	JOYCON_CTLR_TYPE_JCL = 0x01,
309 	JOYCON_CTLR_TYPE_JCR = 0x02,
310 	JOYCON_CTLR_TYPE_PRO = 0x03,
311 };
312 
313 struct joycon_stick_cal {
314 	s32 max;
315 	s32 min;
316 	s32 center;
317 };
318 
319 struct joycon_imu_cal {
320 	s16 offset[3];
321 	s16 scale[3];
322 };
323 
324 /*
325  * All the controller's button values are stored in a u32.
326  * They can be accessed with bitwise ANDs.
327  */
328 static const u32 JC_BTN_Y	= BIT(0);
329 static const u32 JC_BTN_X	= BIT(1);
330 static const u32 JC_BTN_B	= BIT(2);
331 static const u32 JC_BTN_A	= BIT(3);
332 static const u32 JC_BTN_SR_R	= BIT(4);
333 static const u32 JC_BTN_SL_R	= BIT(5);
334 static const u32 JC_BTN_R	= BIT(6);
335 static const u32 JC_BTN_ZR	= BIT(7);
336 static const u32 JC_BTN_MINUS	= BIT(8);
337 static const u32 JC_BTN_PLUS	= BIT(9);
338 static const u32 JC_BTN_RSTICK	= BIT(10);
339 static const u32 JC_BTN_LSTICK	= BIT(11);
340 static const u32 JC_BTN_HOME	= BIT(12);
341 static const u32 JC_BTN_CAP	= BIT(13); /* capture button */
342 static const u32 JC_BTN_DOWN	= BIT(16);
343 static const u32 JC_BTN_UP	= BIT(17);
344 static const u32 JC_BTN_RIGHT	= BIT(18);
345 static const u32 JC_BTN_LEFT	= BIT(19);
346 static const u32 JC_BTN_SR_L	= BIT(20);
347 static const u32 JC_BTN_SL_L	= BIT(21);
348 static const u32 JC_BTN_L	= BIT(22);
349 static const u32 JC_BTN_ZL	= BIT(23);
350 
351 enum joycon_msg_type {
352 	JOYCON_MSG_TYPE_NONE,
353 	JOYCON_MSG_TYPE_USB,
354 	JOYCON_MSG_TYPE_SUBCMD,
355 };
356 
357 struct joycon_rumble_output {
358 	u8 output_id;
359 	u8 packet_num;
360 	u8 rumble_data[8];
361 } __packed;
362 
363 struct joycon_subcmd_request {
364 	u8 output_id; /* must be 0x01 for subcommand, 0x10 for rumble only */
365 	u8 packet_num; /* incremented every send */
366 	u8 rumble_data[8];
367 	u8 subcmd_id;
368 	u8 data[]; /* length depends on the subcommand */
369 } __packed;
370 
371 struct joycon_subcmd_reply {
372 	u8 ack; /* MSB 1 for ACK, 0 for NACK */
373 	u8 id; /* id of requested subcmd */
374 	u8 data[]; /* will be at most 35 bytes */
375 } __packed;
376 
377 struct joycon_imu_data {
378 	s16 accel_x;
379 	s16 accel_y;
380 	s16 accel_z;
381 	s16 gyro_x;
382 	s16 gyro_y;
383 	s16 gyro_z;
384 } __packed;
385 
386 struct joycon_input_report {
387 	u8 id;
388 	u8 timer;
389 	u8 bat_con; /* battery and connection info */
390 	u8 button_status[3];
391 	u8 left_stick[3];
392 	u8 right_stick[3];
393 	u8 vibrator_report;
394 
395 	union {
396 		struct joycon_subcmd_reply subcmd_reply;
397 		/* IMU input reports contain 3 samples */
398 		u8 imu_raw_bytes[sizeof(struct joycon_imu_data) * 3];
399 	};
400 } __packed;
401 
402 #define JC_MAX_RESP_SIZE	(sizeof(struct joycon_input_report) + 35)
403 #define JC_RUMBLE_DATA_SIZE	8
404 #define JC_RUMBLE_QUEUE_SIZE	8
405 
406 static const char * const joycon_player_led_names[] = {
407 	LED_FUNCTION_PLAYER1,
408 	LED_FUNCTION_PLAYER2,
409 	LED_FUNCTION_PLAYER3,
410 	LED_FUNCTION_PLAYER4,
411 };
412 #define JC_NUM_LEDS		ARRAY_SIZE(joycon_player_led_names)
413 #define JC_NUM_LED_PATTERNS 8
414 /* Taken from https://www.nintendo.com/my/support/qa/detail/33822 */
415 static const enum led_brightness joycon_player_led_patterns[JC_NUM_LED_PATTERNS][JC_NUM_LEDS] = {
416 	{ 1, 0, 0, 0 },
417 	{ 1, 1, 0, 0 },
418 	{ 1, 1, 1, 0 },
419 	{ 1, 1, 1, 1 },
420 	{ 1, 0, 0, 1 },
421 	{ 1, 0, 1, 0 },
422 	{ 1, 0, 1, 1 },
423 	{ 0, 1, 1, 0 },
424 };
425 
426 /* Each physical controller is associated with a joycon_ctlr struct */
427 struct joycon_ctlr {
428 	struct hid_device *hdev;
429 	struct input_dev *input;
430 	struct led_classdev leds[JC_NUM_LEDS]; /* player leds */
431 	struct led_classdev home_led;
432 	enum joycon_ctlr_state ctlr_state;
433 	spinlock_t lock;
434 	u8 mac_addr[6];
435 	char *mac_addr_str;
436 	enum joycon_ctlr_type ctlr_type;
437 
438 	/* The following members are used for synchronous sends/receives */
439 	enum joycon_msg_type msg_type;
440 	u8 subcmd_num;
441 	struct mutex output_mutex;
442 	u8 input_buf[JC_MAX_RESP_SIZE];
443 	wait_queue_head_t wait;
444 	bool received_resp;
445 	u8 usb_ack_match;
446 	u8 subcmd_ack_match;
447 	bool received_input_report;
448 	unsigned int last_input_report_msecs;
449 	unsigned int last_subcmd_sent_msecs;
450 	unsigned int consecutive_valid_report_deltas;
451 
452 	/* factory calibration data */
453 	struct joycon_stick_cal left_stick_cal_x;
454 	struct joycon_stick_cal left_stick_cal_y;
455 	struct joycon_stick_cal right_stick_cal_x;
456 	struct joycon_stick_cal right_stick_cal_y;
457 
458 	struct joycon_imu_cal accel_cal;
459 	struct joycon_imu_cal gyro_cal;
460 
461 	/* prevents needlessly recalculating these divisors every sample */
462 	s32 imu_cal_accel_divisor[3];
463 	s32 imu_cal_gyro_divisor[3];
464 
465 	/* power supply data */
466 	struct power_supply *battery;
467 	struct power_supply_desc battery_desc;
468 	u8 battery_capacity;
469 	bool battery_charging;
470 	bool host_powered;
471 
472 	/* rumble */
473 	u8 rumble_data[JC_RUMBLE_QUEUE_SIZE][JC_RUMBLE_DATA_SIZE];
474 	int rumble_queue_head;
475 	int rumble_queue_tail;
476 	struct workqueue_struct *rumble_queue;
477 	struct work_struct rumble_worker;
478 	unsigned int rumble_msecs;
479 	u16 rumble_ll_freq;
480 	u16 rumble_lh_freq;
481 	u16 rumble_rl_freq;
482 	u16 rumble_rh_freq;
483 	unsigned short rumble_zero_countdown;
484 
485 	/* imu */
486 	struct input_dev *imu_input;
487 	bool imu_first_packet_received; /* helps in initiating timestamp */
488 	unsigned int imu_timestamp_us; /* timestamp we report to userspace */
489 	unsigned int imu_last_pkt_ms; /* used to calc imu report delta */
490 	/* the following are used to track the average imu report time delta */
491 	unsigned int imu_delta_samples_count;
492 	unsigned int imu_delta_samples_sum;
493 	unsigned int imu_avg_delta_ms;
494 };
495 
496 /* Helper macros for checking controller type */
497 #define jc_type_is_joycon(ctlr) \
498 	(ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONL || \
499 	 ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONR || \
500 	 ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP)
501 #define jc_type_is_procon(ctlr) \
502 	(ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_PROCON)
503 #define jc_type_is_chrggrip(ctlr) \
504 	(ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP)
505 
506 /* Does this controller have inputs associated with left joycon? */
507 #define jc_type_has_left(ctlr) \
508 	(ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCL || \
509 	 ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO)
510 
511 /* Does this controller have inputs associated with right joycon? */
512 #define jc_type_has_right(ctlr) \
513 	(ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCR || \
514 	 ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO)
515 
516 static int __joycon_hid_send(struct hid_device *hdev, u8 *data, size_t len)
517 {
518 	u8 *buf;
519 	int ret;
520 
521 	buf = kmemdup(data, len, GFP_KERNEL);
522 	if (!buf)
523 		return -ENOMEM;
524 	ret = hid_hw_output_report(hdev, buf, len);
525 	kfree(buf);
526 	if (ret < 0)
527 		hid_dbg(hdev, "Failed to send output report ret=%d\n", ret);
528 	return ret;
529 }
530 
531 static void joycon_wait_for_input_report(struct joycon_ctlr *ctlr)
532 {
533 	int ret;
534 
535 	/*
536 	 * If we are in the proper reporting mode, wait for an input
537 	 * report prior to sending the subcommand. This improves
538 	 * reliability considerably.
539 	 */
540 	if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ) {
541 		unsigned long flags;
542 
543 		spin_lock_irqsave(&ctlr->lock, flags);
544 		ctlr->received_input_report = false;
545 		spin_unlock_irqrestore(&ctlr->lock, flags);
546 		ret = wait_event_timeout(ctlr->wait,
547 					 ctlr->received_input_report,
548 					 HZ / 4);
549 		/* We will still proceed, even with a timeout here */
550 		if (!ret)
551 			hid_warn(ctlr->hdev,
552 				 "timeout waiting for input report\n");
553 	}
554 }
555 
556 /*
557  * Sending subcommands and/or rumble data at too high a rate can cause bluetooth
558  * controller disconnections.
559  */
560 #define JC_INPUT_REPORT_MIN_DELTA	8
561 #define JC_INPUT_REPORT_MAX_DELTA	17
562 #define JC_SUBCMD_TX_OFFSET_MS		4
563 #define JC_SUBCMD_VALID_DELTA_REQ	3
564 #define JC_SUBCMD_RATE_MAX_ATTEMPTS	500
565 #define JC_SUBCMD_RATE_LIMITER_USB_MS	20
566 #define JC_SUBCMD_RATE_LIMITER_BT_MS	60
567 #define JC_SUBCMD_RATE_LIMITER_MS(ctlr)	((ctlr)->hdev->bus == BUS_USB ? JC_SUBCMD_RATE_LIMITER_USB_MS : JC_SUBCMD_RATE_LIMITER_BT_MS)
568 static void joycon_enforce_subcmd_rate(struct joycon_ctlr *ctlr)
569 {
570 	unsigned int current_ms;
571 	unsigned long subcmd_delta;
572 	int consecutive_valid_deltas = 0;
573 	int attempts = 0;
574 	unsigned long flags;
575 
576 	if (unlikely(ctlr->ctlr_state != JOYCON_CTLR_STATE_READ))
577 		return;
578 
579 	do {
580 		joycon_wait_for_input_report(ctlr);
581 		current_ms = jiffies_to_msecs(jiffies);
582 		subcmd_delta = current_ms - ctlr->last_subcmd_sent_msecs;
583 
584 		spin_lock_irqsave(&ctlr->lock, flags);
585 		consecutive_valid_deltas = ctlr->consecutive_valid_report_deltas;
586 		spin_unlock_irqrestore(&ctlr->lock, flags);
587 
588 		attempts++;
589 	} while ((consecutive_valid_deltas < JC_SUBCMD_VALID_DELTA_REQ ||
590 		  subcmd_delta < JC_SUBCMD_RATE_LIMITER_MS(ctlr)) &&
591 		 ctlr->ctlr_state == JOYCON_CTLR_STATE_READ &&
592 		 attempts < JC_SUBCMD_RATE_MAX_ATTEMPTS);
593 
594 	if (attempts >= JC_SUBCMD_RATE_MAX_ATTEMPTS) {
595 		hid_warn(ctlr->hdev, "%s: exceeded max attempts", __func__);
596 		return;
597 	}
598 
599 	ctlr->last_subcmd_sent_msecs = current_ms;
600 
601 	/*
602 	 * Wait a short time after receiving an input report before
603 	 * transmitting. This should reduce odds of a TX coinciding with an RX.
604 	 * Minimizing concurrent BT traffic with the controller seems to lower
605 	 * the rate of disconnections.
606 	 */
607 	msleep(JC_SUBCMD_TX_OFFSET_MS);
608 }
609 
610 static int joycon_hid_send_sync(struct joycon_ctlr *ctlr, u8 *data, size_t len,
611 				u32 timeout)
612 {
613 	int ret;
614 	int tries = 2;
615 
616 	/*
617 	 * The controller occasionally seems to drop subcommands. In testing,
618 	 * doing one retry after a timeout appears to always work.
619 	 */
620 	while (tries--) {
621 		joycon_enforce_subcmd_rate(ctlr);
622 
623 		ret = __joycon_hid_send(ctlr->hdev, data, len);
624 		if (ret < 0) {
625 			memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE);
626 			return ret;
627 		}
628 
629 		ret = wait_event_timeout(ctlr->wait, ctlr->received_resp,
630 					 timeout);
631 		if (!ret) {
632 			hid_dbg(ctlr->hdev,
633 				"synchronous send/receive timed out\n");
634 			if (tries) {
635 				hid_dbg(ctlr->hdev,
636 					"retrying sync send after timeout\n");
637 			}
638 			memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE);
639 			ret = -ETIMEDOUT;
640 		} else {
641 			ret = 0;
642 			break;
643 		}
644 	}
645 
646 	ctlr->received_resp = false;
647 	return ret;
648 }
649 
650 static int joycon_send_usb(struct joycon_ctlr *ctlr, u8 cmd, u32 timeout)
651 {
652 	int ret;
653 	u8 buf[2] = {JC_OUTPUT_USB_CMD};
654 
655 	buf[1] = cmd;
656 	ctlr->usb_ack_match = cmd;
657 	ctlr->msg_type = JOYCON_MSG_TYPE_USB;
658 	ret = joycon_hid_send_sync(ctlr, buf, sizeof(buf), timeout);
659 	if (ret)
660 		hid_dbg(ctlr->hdev, "send usb command failed; ret=%d\n", ret);
661 	return ret;
662 }
663 
664 static int joycon_send_subcmd(struct joycon_ctlr *ctlr,
665 			      struct joycon_subcmd_request *subcmd,
666 			      size_t data_len, u32 timeout)
667 {
668 	int ret;
669 	unsigned long flags;
670 
671 	spin_lock_irqsave(&ctlr->lock, flags);
672 	/*
673 	 * If the controller has been removed, just return ENODEV so the LED
674 	 * subsystem doesn't print invalid errors on removal.
675 	 */
676 	if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) {
677 		spin_unlock_irqrestore(&ctlr->lock, flags);
678 		return -ENODEV;
679 	}
680 	memcpy(subcmd->rumble_data, ctlr->rumble_data[ctlr->rumble_queue_tail],
681 	       JC_RUMBLE_DATA_SIZE);
682 	spin_unlock_irqrestore(&ctlr->lock, flags);
683 
684 	subcmd->output_id = JC_OUTPUT_RUMBLE_AND_SUBCMD;
685 	subcmd->packet_num = ctlr->subcmd_num;
686 	if (++ctlr->subcmd_num > 0xF)
687 		ctlr->subcmd_num = 0;
688 	ctlr->subcmd_ack_match = subcmd->subcmd_id;
689 	ctlr->msg_type = JOYCON_MSG_TYPE_SUBCMD;
690 
691 	ret = joycon_hid_send_sync(ctlr, (u8 *)subcmd,
692 				   sizeof(*subcmd) + data_len, timeout);
693 	if (ret < 0)
694 		hid_dbg(ctlr->hdev, "send subcommand failed; ret=%d\n", ret);
695 	else
696 		ret = 0;
697 	return ret;
698 }
699 
700 /* Supply nibbles for flash and on. Ones correspond to active */
701 static int joycon_set_player_leds(struct joycon_ctlr *ctlr, u8 flash, u8 on)
702 {
703 	struct joycon_subcmd_request *req;
704 	u8 buffer[sizeof(*req) + 1] = { 0 };
705 
706 	req = (struct joycon_subcmd_request *)buffer;
707 	req->subcmd_id = JC_SUBCMD_SET_PLAYER_LIGHTS;
708 	req->data[0] = (flash << 4) | on;
709 
710 	hid_dbg(ctlr->hdev, "setting player leds\n");
711 	return joycon_send_subcmd(ctlr, req, 1, HZ/4);
712 }
713 
714 static int joycon_set_home_led(struct joycon_ctlr *ctlr, enum led_brightness brightness)
715 {
716 	struct joycon_subcmd_request *req;
717 	u8 buffer[sizeof(*req) + 5] = { 0 };
718 	u8 *data;
719 
720 	req = (struct joycon_subcmd_request *)buffer;
721 	req->subcmd_id = JC_SUBCMD_SET_HOME_LIGHT;
722 	data = req->data;
723 	data[0] = 0x01;
724 	data[1] = brightness << 4;
725 	data[2] = brightness | (brightness << 4);
726 	data[3] = 0x11;
727 	data[4] = 0x11;
728 
729 	hid_dbg(ctlr->hdev, "setting home led brightness\n");
730 	return joycon_send_subcmd(ctlr, req, 5, HZ/4);
731 }
732 
733 static int joycon_request_spi_flash_read(struct joycon_ctlr *ctlr,
734 					 u32 start_addr, u8 size, u8 **reply)
735 {
736 	struct joycon_subcmd_request *req;
737 	struct joycon_input_report *report;
738 	u8 buffer[sizeof(*req) + 5] = { 0 };
739 	u8 *data;
740 	int ret;
741 
742 	if (!reply)
743 		return -EINVAL;
744 
745 	req = (struct joycon_subcmd_request *)buffer;
746 	req->subcmd_id = JC_SUBCMD_SPI_FLASH_READ;
747 	data = req->data;
748 	put_unaligned_le32(start_addr, data);
749 	data[4] = size;
750 
751 	hid_dbg(ctlr->hdev, "requesting SPI flash data\n");
752 	ret = joycon_send_subcmd(ctlr, req, 5, HZ);
753 	if (ret) {
754 		hid_err(ctlr->hdev, "failed reading SPI flash; ret=%d\n", ret);
755 	} else {
756 		report = (struct joycon_input_report *)ctlr->input_buf;
757 		/* The read data starts at the 6th byte */
758 		*reply = &report->subcmd_reply.data[5];
759 	}
760 	return ret;
761 }
762 
763 /*
764  * User calibration's presence is denoted with a magic byte preceding it.
765  * returns 0 if magic val is present, 1 if not present, < 0 on error
766  */
767 static int joycon_check_for_cal_magic(struct joycon_ctlr *ctlr, u32 flash_addr)
768 {
769 	int ret;
770 	u8 *reply;
771 
772 	ret = joycon_request_spi_flash_read(ctlr, flash_addr,
773 					    JC_CAL_USR_MAGIC_SIZE, &reply);
774 	if (ret)
775 		return ret;
776 
777 	return reply[0] != JC_CAL_USR_MAGIC_0 || reply[1] != JC_CAL_USR_MAGIC_1;
778 }
779 
780 static int joycon_read_stick_calibration(struct joycon_ctlr *ctlr, u16 cal_addr,
781 					 struct joycon_stick_cal *cal_x,
782 					 struct joycon_stick_cal *cal_y,
783 					 bool left_stick)
784 {
785 	s32 x_max_above;
786 	s32 x_min_below;
787 	s32 y_max_above;
788 	s32 y_min_below;
789 	u8 *raw_cal;
790 	int ret;
791 
792 	ret = joycon_request_spi_flash_read(ctlr, cal_addr,
793 					    JC_CAL_STICK_DATA_SIZE, &raw_cal);
794 	if (ret)
795 		return ret;
796 
797 	/* stick calibration parsing: note the order differs based on stick */
798 	if (left_stick) {
799 		x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0,
800 						12);
801 		y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4,
802 						12);
803 		cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0,
804 						  12);
805 		cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4,
806 						  12);
807 		x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0,
808 						12);
809 		y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4,
810 						12);
811 	} else {
812 		cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0,
813 						  12);
814 		cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4,
815 						  12);
816 		x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0,
817 						12);
818 		y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4,
819 						12);
820 		x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0,
821 						12);
822 		y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4,
823 						12);
824 	}
825 
826 	cal_x->max = cal_x->center + x_max_above;
827 	cal_x->min = cal_x->center - x_min_below;
828 	cal_y->max = cal_y->center + y_max_above;
829 	cal_y->min = cal_y->center - y_min_below;
830 
831 	/* check if calibration values are plausible */
832 	if (cal_x->min >= cal_x->center || cal_x->center >= cal_x->max ||
833 	    cal_y->min >= cal_y->center || cal_y->center >= cal_y->max)
834 		ret = -EINVAL;
835 
836 	return ret;
837 }
838 
839 static const u16 DFLT_STICK_CAL_CEN = 2000;
840 static const u16 DFLT_STICK_CAL_MAX = 3500;
841 static const u16 DFLT_STICK_CAL_MIN = 500;
842 static void joycon_use_default_calibration(struct hid_device *hdev,
843 					   struct joycon_stick_cal *cal_x,
844 					   struct joycon_stick_cal *cal_y,
845 					   const char *stick, int ret)
846 {
847 	hid_warn(hdev,
848 		 "Failed to read %s stick cal, using defaults; e=%d\n",
849 		 stick, ret);
850 
851 	cal_x->center = cal_y->center = DFLT_STICK_CAL_CEN;
852 	cal_x->max = cal_y->max = DFLT_STICK_CAL_MAX;
853 	cal_x->min = cal_y->min = DFLT_STICK_CAL_MIN;
854 }
855 
856 static int joycon_request_calibration(struct joycon_ctlr *ctlr)
857 {
858 	u16 left_stick_addr = JC_CAL_FCT_DATA_LEFT_ADDR;
859 	u16 right_stick_addr = JC_CAL_FCT_DATA_RIGHT_ADDR;
860 	int ret;
861 
862 	hid_dbg(ctlr->hdev, "requesting cal data\n");
863 
864 	/* check if user stick calibrations are present */
865 	if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_LEFT_MAGIC_ADDR)) {
866 		left_stick_addr = JC_CAL_USR_LEFT_DATA_ADDR;
867 		hid_info(ctlr->hdev, "using user cal for left stick\n");
868 	} else {
869 		hid_info(ctlr->hdev, "using factory cal for left stick\n");
870 	}
871 	if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_RIGHT_MAGIC_ADDR)) {
872 		right_stick_addr = JC_CAL_USR_RIGHT_DATA_ADDR;
873 		hid_info(ctlr->hdev, "using user cal for right stick\n");
874 	} else {
875 		hid_info(ctlr->hdev, "using factory cal for right stick\n");
876 	}
877 
878 	/* read the left stick calibration data */
879 	ret = joycon_read_stick_calibration(ctlr, left_stick_addr,
880 					    &ctlr->left_stick_cal_x,
881 					    &ctlr->left_stick_cal_y,
882 					    true);
883 
884 	if (ret)
885 		joycon_use_default_calibration(ctlr->hdev,
886 					       &ctlr->left_stick_cal_x,
887 					       &ctlr->left_stick_cal_y,
888 					       "left", ret);
889 
890 	/* read the right stick calibration data */
891 	ret = joycon_read_stick_calibration(ctlr, right_stick_addr,
892 					    &ctlr->right_stick_cal_x,
893 					    &ctlr->right_stick_cal_y,
894 					    false);
895 
896 	if (ret)
897 		joycon_use_default_calibration(ctlr->hdev,
898 					       &ctlr->right_stick_cal_x,
899 					       &ctlr->right_stick_cal_y,
900 					       "right", ret);
901 
902 	hid_dbg(ctlr->hdev, "calibration:\n"
903 			    "l_x_c=%d l_x_max=%d l_x_min=%d\n"
904 			    "l_y_c=%d l_y_max=%d l_y_min=%d\n"
905 			    "r_x_c=%d r_x_max=%d r_x_min=%d\n"
906 			    "r_y_c=%d r_y_max=%d r_y_min=%d\n",
907 			    ctlr->left_stick_cal_x.center,
908 			    ctlr->left_stick_cal_x.max,
909 			    ctlr->left_stick_cal_x.min,
910 			    ctlr->left_stick_cal_y.center,
911 			    ctlr->left_stick_cal_y.max,
912 			    ctlr->left_stick_cal_y.min,
913 			    ctlr->right_stick_cal_x.center,
914 			    ctlr->right_stick_cal_x.max,
915 			    ctlr->right_stick_cal_x.min,
916 			    ctlr->right_stick_cal_y.center,
917 			    ctlr->right_stick_cal_y.max,
918 			    ctlr->right_stick_cal_y.min);
919 
920 	return 0;
921 }
922 
923 /*
924  * These divisors are calculated once rather than for each sample. They are only
925  * dependent on the IMU calibration values. They are used when processing the
926  * IMU input reports.
927  */
928 static void joycon_calc_imu_cal_divisors(struct joycon_ctlr *ctlr)
929 {
930 	int i;
931 
932 	for (i = 0; i < 3; i++) {
933 		ctlr->imu_cal_accel_divisor[i] = ctlr->accel_cal.scale[i] -
934 						ctlr->accel_cal.offset[i];
935 		ctlr->imu_cal_gyro_divisor[i] = ctlr->gyro_cal.scale[i] -
936 						ctlr->gyro_cal.offset[i];
937 	}
938 }
939 
940 static const s16 DFLT_ACCEL_OFFSET /*= 0*/;
941 static const s16 DFLT_ACCEL_SCALE = 16384;
942 static const s16 DFLT_GYRO_OFFSET /*= 0*/;
943 static const s16 DFLT_GYRO_SCALE  = 13371;
944 static int joycon_request_imu_calibration(struct joycon_ctlr *ctlr)
945 {
946 	u16 imu_cal_addr = JC_IMU_CAL_FCT_DATA_ADDR;
947 	u8 *raw_cal;
948 	int ret;
949 	int i;
950 
951 	/* check if user calibration exists */
952 	if (!joycon_check_for_cal_magic(ctlr, JC_IMU_CAL_USR_MAGIC_ADDR)) {
953 		imu_cal_addr = JC_IMU_CAL_USR_DATA_ADDR;
954 		hid_info(ctlr->hdev, "using user cal for IMU\n");
955 	} else {
956 		hid_info(ctlr->hdev, "using factory cal for IMU\n");
957 	}
958 
959 	/* request IMU calibration data */
960 	hid_dbg(ctlr->hdev, "requesting IMU cal data\n");
961 	ret = joycon_request_spi_flash_read(ctlr, imu_cal_addr,
962 					    JC_IMU_CAL_DATA_SIZE, &raw_cal);
963 	if (ret) {
964 		hid_warn(ctlr->hdev,
965 			 "Failed to read IMU cal, using defaults; ret=%d\n",
966 			 ret);
967 
968 		for (i = 0; i < 3; i++) {
969 			ctlr->accel_cal.offset[i] = DFLT_ACCEL_OFFSET;
970 			ctlr->accel_cal.scale[i] = DFLT_ACCEL_SCALE;
971 			ctlr->gyro_cal.offset[i] = DFLT_GYRO_OFFSET;
972 			ctlr->gyro_cal.scale[i] = DFLT_GYRO_SCALE;
973 		}
974 		joycon_calc_imu_cal_divisors(ctlr);
975 		return ret;
976 	}
977 
978 	/* IMU calibration parsing */
979 	for (i = 0; i < 3; i++) {
980 		int j = i * 2;
981 
982 		ctlr->accel_cal.offset[i] = get_unaligned_le16(raw_cal + j);
983 		ctlr->accel_cal.scale[i] = get_unaligned_le16(raw_cal + j + 6);
984 		ctlr->gyro_cal.offset[i] = get_unaligned_le16(raw_cal + j + 12);
985 		ctlr->gyro_cal.scale[i] = get_unaligned_le16(raw_cal + j + 18);
986 	}
987 
988 	joycon_calc_imu_cal_divisors(ctlr);
989 
990 	hid_dbg(ctlr->hdev, "IMU calibration:\n"
991 			    "a_o[0]=%d a_o[1]=%d a_o[2]=%d\n"
992 			    "a_s[0]=%d a_s[1]=%d a_s[2]=%d\n"
993 			    "g_o[0]=%d g_o[1]=%d g_o[2]=%d\n"
994 			    "g_s[0]=%d g_s[1]=%d g_s[2]=%d\n",
995 			    ctlr->accel_cal.offset[0],
996 			    ctlr->accel_cal.offset[1],
997 			    ctlr->accel_cal.offset[2],
998 			    ctlr->accel_cal.scale[0],
999 			    ctlr->accel_cal.scale[1],
1000 			    ctlr->accel_cal.scale[2],
1001 			    ctlr->gyro_cal.offset[0],
1002 			    ctlr->gyro_cal.offset[1],
1003 			    ctlr->gyro_cal.offset[2],
1004 			    ctlr->gyro_cal.scale[0],
1005 			    ctlr->gyro_cal.scale[1],
1006 			    ctlr->gyro_cal.scale[2]);
1007 
1008 	return 0;
1009 }
1010 
1011 static int joycon_set_report_mode(struct joycon_ctlr *ctlr)
1012 {
1013 	struct joycon_subcmd_request *req;
1014 	u8 buffer[sizeof(*req) + 1] = { 0 };
1015 
1016 	req = (struct joycon_subcmd_request *)buffer;
1017 	req->subcmd_id = JC_SUBCMD_SET_REPORT_MODE;
1018 	req->data[0] = 0x30; /* standard, full report mode */
1019 
1020 	hid_dbg(ctlr->hdev, "setting controller report mode\n");
1021 	return joycon_send_subcmd(ctlr, req, 1, HZ);
1022 }
1023 
1024 static int joycon_enable_rumble(struct joycon_ctlr *ctlr)
1025 {
1026 	struct joycon_subcmd_request *req;
1027 	u8 buffer[sizeof(*req) + 1] = { 0 };
1028 
1029 	req = (struct joycon_subcmd_request *)buffer;
1030 	req->subcmd_id = JC_SUBCMD_ENABLE_VIBRATION;
1031 	req->data[0] = 0x01; /* note: 0x00 would disable */
1032 
1033 	hid_dbg(ctlr->hdev, "enabling rumble\n");
1034 	return joycon_send_subcmd(ctlr, req, 1, HZ/4);
1035 }
1036 
1037 static int joycon_enable_imu(struct joycon_ctlr *ctlr)
1038 {
1039 	struct joycon_subcmd_request *req;
1040 	u8 buffer[sizeof(*req) + 1] = { 0 };
1041 
1042 	req = (struct joycon_subcmd_request *)buffer;
1043 	req->subcmd_id = JC_SUBCMD_ENABLE_IMU;
1044 	req->data[0] = 0x01; /* note: 0x00 would disable */
1045 
1046 	hid_dbg(ctlr->hdev, "enabling IMU\n");
1047 	return joycon_send_subcmd(ctlr, req, 1, HZ);
1048 }
1049 
1050 static s32 joycon_map_stick_val(struct joycon_stick_cal *cal, s32 val)
1051 {
1052 	s32 center = cal->center;
1053 	s32 min = cal->min;
1054 	s32 max = cal->max;
1055 	s32 new_val;
1056 
1057 	if (val > center) {
1058 		new_val = (val - center) * JC_MAX_STICK_MAG;
1059 		new_val /= (max - center);
1060 	} else {
1061 		new_val = (center - val) * -JC_MAX_STICK_MAG;
1062 		new_val /= (center - min);
1063 	}
1064 	new_val = clamp(new_val, (s32)-JC_MAX_STICK_MAG, (s32)JC_MAX_STICK_MAG);
1065 	return new_val;
1066 }
1067 
1068 static void joycon_input_report_parse_imu_data(struct joycon_ctlr *ctlr,
1069 					       struct joycon_input_report *rep,
1070 					       struct joycon_imu_data *imu_data)
1071 {
1072 	u8 *raw = rep->imu_raw_bytes;
1073 	int i;
1074 
1075 	for (i = 0; i < 3; i++) {
1076 		struct joycon_imu_data *data = &imu_data[i];
1077 
1078 		data->accel_x = get_unaligned_le16(raw + 0);
1079 		data->accel_y = get_unaligned_le16(raw + 2);
1080 		data->accel_z = get_unaligned_le16(raw + 4);
1081 		data->gyro_x = get_unaligned_le16(raw + 6);
1082 		data->gyro_y = get_unaligned_le16(raw + 8);
1083 		data->gyro_z = get_unaligned_le16(raw + 10);
1084 		/* point to next imu sample */
1085 		raw += sizeof(struct joycon_imu_data);
1086 	}
1087 }
1088 
1089 static void joycon_parse_imu_report(struct joycon_ctlr *ctlr,
1090 				    struct joycon_input_report *rep)
1091 {
1092 	struct joycon_imu_data imu_data[3] = {0}; /* 3 reports per packet */
1093 	struct input_dev *idev = ctlr->imu_input;
1094 	unsigned int msecs = jiffies_to_msecs(jiffies);
1095 	unsigned int last_msecs = ctlr->imu_last_pkt_ms;
1096 	int i;
1097 	int value[6];
1098 
1099 	joycon_input_report_parse_imu_data(ctlr, rep, imu_data);
1100 
1101 	/*
1102 	 * There are complexities surrounding how we determine the timestamps we
1103 	 * associate with the samples we pass to userspace. The IMU input
1104 	 * reports do not provide us with a good timestamp. There's a quickly
1105 	 * incrementing 8-bit counter per input report, but it is not very
1106 	 * useful for this purpose (it is not entirely clear what rate it
1107 	 * increments at or if it varies based on packet push rate - more on
1108 	 * the push rate below...).
1109 	 *
1110 	 * The reverse engineering work done on the joy-cons and pro controllers
1111 	 * by the community seems to indicate the following:
1112 	 * - The controller samples the IMU every 1.35ms. It then does some of
1113 	 *   its own processing, probably averaging the samples out.
1114 	 * - Each imu input report contains 3 IMU samples, (usually 5ms apart).
1115 	 * - In the standard reporting mode (which this driver uses exclusively)
1116 	 *   input reports are pushed from the controller as follows:
1117 	 *      * joy-con (bluetooth): every 15 ms
1118 	 *      * joy-cons (in charging grip via USB): every 15 ms
1119 	 *      * pro controller (USB): every 15 ms
1120 	 *      * pro controller (bluetooth): every 8 ms (this is the wildcard)
1121 	 *
1122 	 * Further complicating matters is that some bluetooth stacks are known
1123 	 * to alter the controller's packet rate by hardcoding the bluetooth
1124 	 * SSR for the switch controllers (android's stack currently sets the
1125 	 * SSR to 11ms for both the joy-cons and pro controllers).
1126 	 *
1127 	 * In my own testing, I've discovered that my pro controller either
1128 	 * reports IMU sample batches every 11ms or every 15ms. This rate is
1129 	 * stable after connecting. It isn't 100% clear what determines this
1130 	 * rate. Importantly, even when sending every 11ms, none of the samples
1131 	 * are duplicates. This seems to indicate that the time deltas between
1132 	 * reported samples can vary based on the input report rate.
1133 	 *
1134 	 * The solution employed in this driver is to keep track of the average
1135 	 * time delta between IMU input reports. In testing, this value has
1136 	 * proven to be stable, staying at 15ms or 11ms, though other hardware
1137 	 * configurations and bluetooth stacks could potentially see other rates
1138 	 * (hopefully this will become more clear as more people use the
1139 	 * driver).
1140 	 *
1141 	 * Keeping track of the average report delta allows us to submit our
1142 	 * timestamps to userspace based on that. Each report contains 3
1143 	 * samples, so the IMU sampling rate should be avg_time_delta/3. We can
1144 	 * also use this average to detect events where we have dropped a
1145 	 * packet. The userspace timestamp for the samples will be adjusted
1146 	 * accordingly to prevent unwanted behvaior.
1147 	 */
1148 	if (!ctlr->imu_first_packet_received) {
1149 		ctlr->imu_timestamp_us = 0;
1150 		ctlr->imu_delta_samples_count = 0;
1151 		ctlr->imu_delta_samples_sum = 0;
1152 		ctlr->imu_avg_delta_ms = JC_IMU_DFLT_AVG_DELTA_MS;
1153 		ctlr->imu_first_packet_received = true;
1154 	} else {
1155 		unsigned int delta = msecs - last_msecs;
1156 		unsigned int dropped_pkts;
1157 		unsigned int dropped_threshold;
1158 
1159 		/* avg imu report delta housekeeping */
1160 		ctlr->imu_delta_samples_sum += delta;
1161 		ctlr->imu_delta_samples_count++;
1162 		if (ctlr->imu_delta_samples_count >=
1163 		    JC_IMU_SAMPLES_PER_DELTA_AVG) {
1164 			ctlr->imu_avg_delta_ms = ctlr->imu_delta_samples_sum /
1165 						 ctlr->imu_delta_samples_count;
1166 			/* don't ever want divide by zero shenanigans */
1167 			if (ctlr->imu_avg_delta_ms == 0) {
1168 				ctlr->imu_avg_delta_ms = 1;
1169 				hid_warn(ctlr->hdev,
1170 					 "calculated avg imu delta of 0\n");
1171 			}
1172 			ctlr->imu_delta_samples_count = 0;
1173 			ctlr->imu_delta_samples_sum = 0;
1174 		}
1175 
1176 		/* useful for debugging IMU sample rate */
1177 		hid_dbg(ctlr->hdev,
1178 			"imu_report: ms=%u last_ms=%u delta=%u avg_delta=%u\n",
1179 			msecs, last_msecs, delta, ctlr->imu_avg_delta_ms);
1180 
1181 		/* check if any packets have been dropped */
1182 		dropped_threshold = ctlr->imu_avg_delta_ms * 3 / 2;
1183 		dropped_pkts = (delta - min(delta, dropped_threshold)) /
1184 				ctlr->imu_avg_delta_ms;
1185 		ctlr->imu_timestamp_us += 1000 * ctlr->imu_avg_delta_ms;
1186 		if (dropped_pkts > JC_IMU_DROPPED_PKT_WARNING) {
1187 			hid_warn(ctlr->hdev,
1188 				 "compensating for %u dropped IMU reports\n",
1189 				 dropped_pkts);
1190 			hid_warn(ctlr->hdev,
1191 				 "delta=%u avg_delta=%u\n",
1192 				 delta, ctlr->imu_avg_delta_ms);
1193 		}
1194 	}
1195 	ctlr->imu_last_pkt_ms = msecs;
1196 
1197 	/* Each IMU input report contains three samples */
1198 	for (i = 0; i < 3; i++) {
1199 		input_event(idev, EV_MSC, MSC_TIMESTAMP,
1200 			    ctlr->imu_timestamp_us);
1201 
1202 		/*
1203 		 * These calculations (which use the controller's calibration
1204 		 * settings to improve the final values) are based on those
1205 		 * found in the community's reverse-engineering repo (linked at
1206 		 * top of driver). For hid-nintendo, we make sure that the final
1207 		 * value given to userspace is always in terms of the axis
1208 		 * resolution we provided.
1209 		 *
1210 		 * Currently only the gyro calculations subtract the calibration
1211 		 * offsets from the raw value itself. In testing, doing the same
1212 		 * for the accelerometer raw values decreased accuracy.
1213 		 *
1214 		 * Note that the gyro values are multiplied by the
1215 		 * precision-saving scaling factor to prevent large inaccuracies
1216 		 * due to truncation of the resolution value which would
1217 		 * otherwise occur. To prevent overflow (without resorting to 64
1218 		 * bit integer math), the mult_frac macro is used.
1219 		 */
1220 		value[0] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
1221 				      (imu_data[i].gyro_x -
1222 				       ctlr->gyro_cal.offset[0])),
1223 				     ctlr->gyro_cal.scale[0],
1224 				     ctlr->imu_cal_gyro_divisor[0]);
1225 		value[1] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
1226 				      (imu_data[i].gyro_y -
1227 				       ctlr->gyro_cal.offset[1])),
1228 				     ctlr->gyro_cal.scale[1],
1229 				     ctlr->imu_cal_gyro_divisor[1]);
1230 		value[2] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
1231 				      (imu_data[i].gyro_z -
1232 				       ctlr->gyro_cal.offset[2])),
1233 				     ctlr->gyro_cal.scale[2],
1234 				     ctlr->imu_cal_gyro_divisor[2]);
1235 
1236 		value[3] = ((s32)imu_data[i].accel_x *
1237 			    ctlr->accel_cal.scale[0]) /
1238 			    ctlr->imu_cal_accel_divisor[0];
1239 		value[4] = ((s32)imu_data[i].accel_y *
1240 			    ctlr->accel_cal.scale[1]) /
1241 			    ctlr->imu_cal_accel_divisor[1];
1242 		value[5] = ((s32)imu_data[i].accel_z *
1243 			    ctlr->accel_cal.scale[2]) /
1244 			    ctlr->imu_cal_accel_divisor[2];
1245 
1246 		hid_dbg(ctlr->hdev, "raw_gyro: g_x=%d g_y=%d g_z=%d\n",
1247 			imu_data[i].gyro_x, imu_data[i].gyro_y,
1248 			imu_data[i].gyro_z);
1249 		hid_dbg(ctlr->hdev, "raw_accel: a_x=%d a_y=%d a_z=%d\n",
1250 			imu_data[i].accel_x, imu_data[i].accel_y,
1251 			imu_data[i].accel_z);
1252 
1253 		/*
1254 		 * The right joy-con has 2 axes negated, Y and Z. This is due to
1255 		 * the orientation of the IMU in the controller. We negate those
1256 		 * axes' values in order to be consistent with the left joy-con
1257 		 * and the pro controller:
1258 		 *   X: positive is pointing toward the triggers
1259 		 *   Y: positive is pointing to the left
1260 		 *   Z: positive is pointing up (out of the buttons/sticks)
1261 		 * The axes follow the right-hand rule.
1262 		 */
1263 		if (jc_type_is_joycon(ctlr) && jc_type_has_right(ctlr)) {
1264 			int j;
1265 
1266 			/* negate all but x axis */
1267 			for (j = 1; j < 6; ++j) {
1268 				if (j == 3)
1269 					continue;
1270 				value[j] *= -1;
1271 			}
1272 		}
1273 
1274 		input_report_abs(idev, ABS_RX, value[0]);
1275 		input_report_abs(idev, ABS_RY, value[1]);
1276 		input_report_abs(idev, ABS_RZ, value[2]);
1277 		input_report_abs(idev, ABS_X, value[3]);
1278 		input_report_abs(idev, ABS_Y, value[4]);
1279 		input_report_abs(idev, ABS_Z, value[5]);
1280 		input_sync(idev);
1281 		/* convert to micros and divide by 3 (3 samples per report). */
1282 		ctlr->imu_timestamp_us += ctlr->imu_avg_delta_ms * 1000 / 3;
1283 	}
1284 }
1285 
1286 static void joycon_parse_report(struct joycon_ctlr *ctlr,
1287 				struct joycon_input_report *rep)
1288 {
1289 	struct input_dev *dev = ctlr->input;
1290 	unsigned long flags;
1291 	u8 tmp;
1292 	u32 btns;
1293 	unsigned long msecs = jiffies_to_msecs(jiffies);
1294 	unsigned long report_delta_ms = msecs - ctlr->last_input_report_msecs;
1295 
1296 	spin_lock_irqsave(&ctlr->lock, flags);
1297 	if (IS_ENABLED(CONFIG_NINTENDO_FF) && rep->vibrator_report &&
1298 	    ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED &&
1299 	    (msecs - ctlr->rumble_msecs) >= JC_RUMBLE_PERIOD_MS &&
1300 	    (ctlr->rumble_queue_head != ctlr->rumble_queue_tail ||
1301 	     ctlr->rumble_zero_countdown > 0)) {
1302 		/*
1303 		 * When this value reaches 0, we know we've sent multiple
1304 		 * packets to the controller instructing it to disable rumble.
1305 		 * We can safely stop sending periodic rumble packets until the
1306 		 * next ff effect.
1307 		 */
1308 		if (ctlr->rumble_zero_countdown > 0)
1309 			ctlr->rumble_zero_countdown--;
1310 		queue_work(ctlr->rumble_queue, &ctlr->rumble_worker);
1311 	}
1312 
1313 	/* Parse the battery status */
1314 	tmp = rep->bat_con;
1315 	ctlr->host_powered = tmp & BIT(0);
1316 	ctlr->battery_charging = tmp & BIT(4);
1317 	tmp = tmp >> 5;
1318 	switch (tmp) {
1319 	case 0: /* empty */
1320 		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1321 		break;
1322 	case 1: /* low */
1323 		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1324 		break;
1325 	case 2: /* medium */
1326 		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1327 		break;
1328 	case 3: /* high */
1329 		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
1330 		break;
1331 	case 4: /* full */
1332 		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1333 		break;
1334 	default:
1335 		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
1336 		hid_warn(ctlr->hdev, "Invalid battery status\n");
1337 		break;
1338 	}
1339 	spin_unlock_irqrestore(&ctlr->lock, flags);
1340 
1341 	/* Parse the buttons and sticks */
1342 	btns = hid_field_extract(ctlr->hdev, rep->button_status, 0, 24);
1343 
1344 	if (jc_type_has_left(ctlr)) {
1345 		u16 raw_x;
1346 		u16 raw_y;
1347 		s32 x;
1348 		s32 y;
1349 
1350 		/* get raw stick values */
1351 		raw_x = hid_field_extract(ctlr->hdev, rep->left_stick, 0, 12);
1352 		raw_y = hid_field_extract(ctlr->hdev,
1353 					  rep->left_stick + 1, 4, 12);
1354 		/* map the stick values */
1355 		x = joycon_map_stick_val(&ctlr->left_stick_cal_x, raw_x);
1356 		y = -joycon_map_stick_val(&ctlr->left_stick_cal_y, raw_y);
1357 		/* report sticks */
1358 		input_report_abs(dev, ABS_X, x);
1359 		input_report_abs(dev, ABS_Y, y);
1360 
1361 		/* report buttons */
1362 		input_report_key(dev, BTN_TL, btns & JC_BTN_L);
1363 		input_report_key(dev, BTN_TL2, btns & JC_BTN_ZL);
1364 		input_report_key(dev, BTN_SELECT, btns & JC_BTN_MINUS);
1365 		input_report_key(dev, BTN_THUMBL, btns & JC_BTN_LSTICK);
1366 		input_report_key(dev, BTN_Z, btns & JC_BTN_CAP);
1367 
1368 		if (jc_type_is_joycon(ctlr)) {
1369 			/* Report the S buttons as the non-existent triggers */
1370 			input_report_key(dev, BTN_TR, btns & JC_BTN_SL_L);
1371 			input_report_key(dev, BTN_TR2, btns & JC_BTN_SR_L);
1372 
1373 			/* Report d-pad as digital buttons for the joy-cons */
1374 			input_report_key(dev, BTN_DPAD_DOWN,
1375 					 btns & JC_BTN_DOWN);
1376 			input_report_key(dev, BTN_DPAD_UP, btns & JC_BTN_UP);
1377 			input_report_key(dev, BTN_DPAD_RIGHT,
1378 					 btns & JC_BTN_RIGHT);
1379 			input_report_key(dev, BTN_DPAD_LEFT,
1380 					 btns & JC_BTN_LEFT);
1381 		} else {
1382 			int hatx = 0;
1383 			int haty = 0;
1384 
1385 			/* d-pad x */
1386 			if (btns & JC_BTN_LEFT)
1387 				hatx = -1;
1388 			else if (btns & JC_BTN_RIGHT)
1389 				hatx = 1;
1390 			input_report_abs(dev, ABS_HAT0X, hatx);
1391 
1392 			/* d-pad y */
1393 			if (btns & JC_BTN_UP)
1394 				haty = -1;
1395 			else if (btns & JC_BTN_DOWN)
1396 				haty = 1;
1397 			input_report_abs(dev, ABS_HAT0Y, haty);
1398 		}
1399 	}
1400 	if (jc_type_has_right(ctlr)) {
1401 		u16 raw_x;
1402 		u16 raw_y;
1403 		s32 x;
1404 		s32 y;
1405 
1406 		/* get raw stick values */
1407 		raw_x = hid_field_extract(ctlr->hdev, rep->right_stick, 0, 12);
1408 		raw_y = hid_field_extract(ctlr->hdev,
1409 					  rep->right_stick + 1, 4, 12);
1410 		/* map stick values */
1411 		x = joycon_map_stick_val(&ctlr->right_stick_cal_x, raw_x);
1412 		y = -joycon_map_stick_val(&ctlr->right_stick_cal_y, raw_y);
1413 		/* report sticks */
1414 		input_report_abs(dev, ABS_RX, x);
1415 		input_report_abs(dev, ABS_RY, y);
1416 
1417 		/* report buttons */
1418 		input_report_key(dev, BTN_TR, btns & JC_BTN_R);
1419 		input_report_key(dev, BTN_TR2, btns & JC_BTN_ZR);
1420 		if (jc_type_is_joycon(ctlr)) {
1421 			/* Report the S buttons as the non-existent triggers */
1422 			input_report_key(dev, BTN_TL, btns & JC_BTN_SL_R);
1423 			input_report_key(dev, BTN_TL2, btns & JC_BTN_SR_R);
1424 		}
1425 		input_report_key(dev, BTN_START, btns & JC_BTN_PLUS);
1426 		input_report_key(dev, BTN_THUMBR, btns & JC_BTN_RSTICK);
1427 		input_report_key(dev, BTN_MODE, btns & JC_BTN_HOME);
1428 		input_report_key(dev, BTN_WEST, btns & JC_BTN_Y);
1429 		input_report_key(dev, BTN_NORTH, btns & JC_BTN_X);
1430 		input_report_key(dev, BTN_EAST, btns & JC_BTN_A);
1431 		input_report_key(dev, BTN_SOUTH, btns & JC_BTN_B);
1432 	}
1433 
1434 	input_sync(dev);
1435 
1436 	spin_lock_irqsave(&ctlr->lock, flags);
1437 	ctlr->last_input_report_msecs = msecs;
1438 	/*
1439 	 * Was this input report a reasonable time delta compared to the prior
1440 	 * report? We use this information to decide when a safe time is to send
1441 	 * rumble packets or subcommand packets.
1442 	 */
1443 	if (report_delta_ms >= JC_INPUT_REPORT_MIN_DELTA &&
1444 	    report_delta_ms <= JC_INPUT_REPORT_MAX_DELTA) {
1445 		if (ctlr->consecutive_valid_report_deltas < JC_SUBCMD_VALID_DELTA_REQ)
1446 			ctlr->consecutive_valid_report_deltas++;
1447 	} else {
1448 		ctlr->consecutive_valid_report_deltas = 0;
1449 	}
1450 	/*
1451 	 * Our consecutive valid report tracking is only relevant for
1452 	 * bluetooth-connected controllers. For USB devices, we're beholden to
1453 	 * USB's underlying polling rate anyway. Always set to the consecutive
1454 	 * delta requirement.
1455 	 */
1456 	if (ctlr->hdev->bus == BUS_USB)
1457 		ctlr->consecutive_valid_report_deltas = JC_SUBCMD_VALID_DELTA_REQ;
1458 
1459 	spin_unlock_irqrestore(&ctlr->lock, flags);
1460 
1461 	/*
1462 	 * Immediately after receiving a report is the most reliable time to
1463 	 * send a subcommand to the controller. Wake any subcommand senders
1464 	 * waiting for a report.
1465 	 */
1466 	if (unlikely(mutex_is_locked(&ctlr->output_mutex))) {
1467 		spin_lock_irqsave(&ctlr->lock, flags);
1468 		ctlr->received_input_report = true;
1469 		spin_unlock_irqrestore(&ctlr->lock, flags);
1470 		wake_up(&ctlr->wait);
1471 	}
1472 
1473 	/* parse IMU data if present */
1474 	if (rep->id == JC_INPUT_IMU_DATA)
1475 		joycon_parse_imu_report(ctlr, rep);
1476 }
1477 
1478 static int joycon_send_rumble_data(struct joycon_ctlr *ctlr)
1479 {
1480 	int ret;
1481 	unsigned long flags;
1482 	struct joycon_rumble_output rumble_output = { 0 };
1483 
1484 	spin_lock_irqsave(&ctlr->lock, flags);
1485 	/*
1486 	 * If the controller has been removed, just return ENODEV so the LED
1487 	 * subsystem doesn't print invalid errors on removal.
1488 	 */
1489 	if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) {
1490 		spin_unlock_irqrestore(&ctlr->lock, flags);
1491 		return -ENODEV;
1492 	}
1493 	memcpy(rumble_output.rumble_data,
1494 	       ctlr->rumble_data[ctlr->rumble_queue_tail],
1495 	       JC_RUMBLE_DATA_SIZE);
1496 	spin_unlock_irqrestore(&ctlr->lock, flags);
1497 
1498 	rumble_output.output_id = JC_OUTPUT_RUMBLE_ONLY;
1499 	rumble_output.packet_num = ctlr->subcmd_num;
1500 	if (++ctlr->subcmd_num > 0xF)
1501 		ctlr->subcmd_num = 0;
1502 
1503 	joycon_enforce_subcmd_rate(ctlr);
1504 
1505 	ret = __joycon_hid_send(ctlr->hdev, (u8 *)&rumble_output,
1506 				sizeof(rumble_output));
1507 	return ret;
1508 }
1509 
1510 static void joycon_rumble_worker(struct work_struct *work)
1511 {
1512 	struct joycon_ctlr *ctlr = container_of(work, struct joycon_ctlr,
1513 							rumble_worker);
1514 	unsigned long flags;
1515 	bool again = true;
1516 	int ret;
1517 
1518 	while (again) {
1519 		mutex_lock(&ctlr->output_mutex);
1520 		ret = joycon_send_rumble_data(ctlr);
1521 		mutex_unlock(&ctlr->output_mutex);
1522 
1523 		/* -ENODEV means the controller was just unplugged */
1524 		spin_lock_irqsave(&ctlr->lock, flags);
1525 		if (ret < 0 && ret != -ENODEV &&
1526 		    ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED)
1527 			hid_warn(ctlr->hdev, "Failed to set rumble; e=%d", ret);
1528 
1529 		ctlr->rumble_msecs = jiffies_to_msecs(jiffies);
1530 		if (ctlr->rumble_queue_tail != ctlr->rumble_queue_head) {
1531 			if (++ctlr->rumble_queue_tail >= JC_RUMBLE_QUEUE_SIZE)
1532 				ctlr->rumble_queue_tail = 0;
1533 		} else {
1534 			again = false;
1535 		}
1536 		spin_unlock_irqrestore(&ctlr->lock, flags);
1537 	}
1538 }
1539 
1540 #if IS_ENABLED(CONFIG_NINTENDO_FF)
1541 static struct joycon_rumble_freq_data joycon_find_rumble_freq(u16 freq)
1542 {
1543 	const size_t length = ARRAY_SIZE(joycon_rumble_frequencies);
1544 	const struct joycon_rumble_freq_data *data = joycon_rumble_frequencies;
1545 	int i = 0;
1546 
1547 	if (freq > data[0].freq) {
1548 		for (i = 1; i < length - 1; i++) {
1549 			if (freq > data[i - 1].freq && freq <= data[i].freq)
1550 				break;
1551 		}
1552 	}
1553 
1554 	return data[i];
1555 }
1556 
1557 static struct joycon_rumble_amp_data joycon_find_rumble_amp(u16 amp)
1558 {
1559 	const size_t length = ARRAY_SIZE(joycon_rumble_amplitudes);
1560 	const struct joycon_rumble_amp_data *data = joycon_rumble_amplitudes;
1561 	int i = 0;
1562 
1563 	if (amp > data[0].amp) {
1564 		for (i = 1; i < length - 1; i++) {
1565 			if (amp > data[i - 1].amp && amp <= data[i].amp)
1566 				break;
1567 		}
1568 	}
1569 
1570 	return data[i];
1571 }
1572 
1573 static void joycon_encode_rumble(u8 *data, u16 freq_low, u16 freq_high, u16 amp)
1574 {
1575 	struct joycon_rumble_freq_data freq_data_low;
1576 	struct joycon_rumble_freq_data freq_data_high;
1577 	struct joycon_rumble_amp_data amp_data;
1578 
1579 	freq_data_low = joycon_find_rumble_freq(freq_low);
1580 	freq_data_high = joycon_find_rumble_freq(freq_high);
1581 	amp_data = joycon_find_rumble_amp(amp);
1582 
1583 	data[0] = (freq_data_high.high >> 8) & 0xFF;
1584 	data[1] = (freq_data_high.high & 0xFF) + amp_data.high;
1585 	data[2] = freq_data_low.low + ((amp_data.low >> 8) & 0xFF);
1586 	data[3] = amp_data.low & 0xFF;
1587 }
1588 
1589 static const u16 JOYCON_MAX_RUMBLE_HIGH_FREQ	= 1253;
1590 static const u16 JOYCON_MIN_RUMBLE_HIGH_FREQ	= 82;
1591 static const u16 JOYCON_MAX_RUMBLE_LOW_FREQ	= 626;
1592 static const u16 JOYCON_MIN_RUMBLE_LOW_FREQ	= 41;
1593 
1594 static void joycon_clamp_rumble_freqs(struct joycon_ctlr *ctlr)
1595 {
1596 	unsigned long flags;
1597 
1598 	spin_lock_irqsave(&ctlr->lock, flags);
1599 	ctlr->rumble_ll_freq = clamp(ctlr->rumble_ll_freq,
1600 				     JOYCON_MIN_RUMBLE_LOW_FREQ,
1601 				     JOYCON_MAX_RUMBLE_LOW_FREQ);
1602 	ctlr->rumble_lh_freq = clamp(ctlr->rumble_lh_freq,
1603 				     JOYCON_MIN_RUMBLE_HIGH_FREQ,
1604 				     JOYCON_MAX_RUMBLE_HIGH_FREQ);
1605 	ctlr->rumble_rl_freq = clamp(ctlr->rumble_rl_freq,
1606 				     JOYCON_MIN_RUMBLE_LOW_FREQ,
1607 				     JOYCON_MAX_RUMBLE_LOW_FREQ);
1608 	ctlr->rumble_rh_freq = clamp(ctlr->rumble_rh_freq,
1609 				     JOYCON_MIN_RUMBLE_HIGH_FREQ,
1610 				     JOYCON_MAX_RUMBLE_HIGH_FREQ);
1611 	spin_unlock_irqrestore(&ctlr->lock, flags);
1612 }
1613 
1614 static int joycon_set_rumble(struct joycon_ctlr *ctlr, u16 amp_r, u16 amp_l,
1615 			     bool schedule_now)
1616 {
1617 	u8 data[JC_RUMBLE_DATA_SIZE];
1618 	u16 amp;
1619 	u16 freq_r_low;
1620 	u16 freq_r_high;
1621 	u16 freq_l_low;
1622 	u16 freq_l_high;
1623 	unsigned long flags;
1624 	int next_rq_head;
1625 
1626 	spin_lock_irqsave(&ctlr->lock, flags);
1627 	freq_r_low = ctlr->rumble_rl_freq;
1628 	freq_r_high = ctlr->rumble_rh_freq;
1629 	freq_l_low = ctlr->rumble_ll_freq;
1630 	freq_l_high = ctlr->rumble_lh_freq;
1631 	/* limit number of silent rumble packets to reduce traffic */
1632 	if (amp_l != 0 || amp_r != 0)
1633 		ctlr->rumble_zero_countdown = JC_RUMBLE_ZERO_AMP_PKT_CNT;
1634 	spin_unlock_irqrestore(&ctlr->lock, flags);
1635 
1636 	/* right joy-con */
1637 	amp = amp_r * (u32)joycon_max_rumble_amp / 65535;
1638 	joycon_encode_rumble(data + 4, freq_r_low, freq_r_high, amp);
1639 
1640 	/* left joy-con */
1641 	amp = amp_l * (u32)joycon_max_rumble_amp / 65535;
1642 	joycon_encode_rumble(data, freq_l_low, freq_l_high, amp);
1643 
1644 	spin_lock_irqsave(&ctlr->lock, flags);
1645 
1646 	next_rq_head = ctlr->rumble_queue_head + 1;
1647 	if (next_rq_head >= JC_RUMBLE_QUEUE_SIZE)
1648 		next_rq_head = 0;
1649 
1650 	/* Did we overrun the circular buffer?
1651 	 * If so, be sure we keep the latest intended rumble state.
1652 	 */
1653 	if (next_rq_head == ctlr->rumble_queue_tail) {
1654 		hid_dbg(ctlr->hdev, "rumble queue is full");
1655 		/* overwrite the prior value at the end of the circular buf */
1656 		next_rq_head = ctlr->rumble_queue_head;
1657 	}
1658 
1659 	ctlr->rumble_queue_head = next_rq_head;
1660 	memcpy(ctlr->rumble_data[ctlr->rumble_queue_head], data,
1661 	       JC_RUMBLE_DATA_SIZE);
1662 
1663 	/* don't wait for the periodic send (reduces latency) */
1664 	if (schedule_now && ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED)
1665 		queue_work(ctlr->rumble_queue, &ctlr->rumble_worker);
1666 
1667 	spin_unlock_irqrestore(&ctlr->lock, flags);
1668 
1669 	return 0;
1670 }
1671 
1672 static int joycon_play_effect(struct input_dev *dev, void *data,
1673 						     struct ff_effect *effect)
1674 {
1675 	struct joycon_ctlr *ctlr = input_get_drvdata(dev);
1676 
1677 	if (effect->type != FF_RUMBLE)
1678 		return 0;
1679 
1680 	return joycon_set_rumble(ctlr,
1681 				 effect->u.rumble.weak_magnitude,
1682 				 effect->u.rumble.strong_magnitude,
1683 				 true);
1684 }
1685 #endif /* IS_ENABLED(CONFIG_NINTENDO_FF) */
1686 
1687 static const unsigned int joycon_button_inputs_l[] = {
1688 	BTN_SELECT, BTN_Z, BTN_THUMBL,
1689 	BTN_TL, BTN_TL2,
1690 	0 /* 0 signals end of array */
1691 };
1692 
1693 static const unsigned int joycon_button_inputs_r[] = {
1694 	BTN_START, BTN_MODE, BTN_THUMBR,
1695 	BTN_SOUTH, BTN_EAST, BTN_NORTH, BTN_WEST,
1696 	BTN_TR, BTN_TR2,
1697 	0 /* 0 signals end of array */
1698 };
1699 
1700 /* We report joy-con d-pad inputs as buttons and pro controller as a hat. */
1701 static const unsigned int joycon_dpad_inputs_jc[] = {
1702 	BTN_DPAD_UP, BTN_DPAD_DOWN, BTN_DPAD_LEFT, BTN_DPAD_RIGHT,
1703 	0 /* 0 signals end of array */
1704 };
1705 
1706 static int joycon_input_create(struct joycon_ctlr *ctlr)
1707 {
1708 	struct hid_device *hdev;
1709 	const char *name;
1710 	const char *imu_name;
1711 	int ret;
1712 	int i;
1713 
1714 	hdev = ctlr->hdev;
1715 
1716 	switch (hdev->product) {
1717 	case USB_DEVICE_ID_NINTENDO_PROCON:
1718 		name = "Nintendo Switch Pro Controller";
1719 		imu_name = "Nintendo Switch Pro Controller IMU";
1720 		break;
1721 	case USB_DEVICE_ID_NINTENDO_CHRGGRIP:
1722 		if (jc_type_has_left(ctlr)) {
1723 			name = "Nintendo Switch Left Joy-Con (Grip)";
1724 			imu_name = "Nintendo Switch Left Joy-Con IMU (Grip)";
1725 		} else {
1726 			name = "Nintendo Switch Right Joy-Con (Grip)";
1727 			imu_name = "Nintendo Switch Right Joy-Con IMU (Grip)";
1728 		}
1729 		break;
1730 	case USB_DEVICE_ID_NINTENDO_JOYCONL:
1731 		name = "Nintendo Switch Left Joy-Con";
1732 		imu_name = "Nintendo Switch Left Joy-Con IMU";
1733 		break;
1734 	case USB_DEVICE_ID_NINTENDO_JOYCONR:
1735 		name = "Nintendo Switch Right Joy-Con";
1736 		imu_name = "Nintendo Switch Right Joy-Con IMU";
1737 		break;
1738 	default: /* Should be impossible */
1739 		hid_err(hdev, "Invalid hid product\n");
1740 		return -EINVAL;
1741 	}
1742 
1743 	ctlr->input = devm_input_allocate_device(&hdev->dev);
1744 	if (!ctlr->input)
1745 		return -ENOMEM;
1746 	ctlr->input->id.bustype = hdev->bus;
1747 	ctlr->input->id.vendor = hdev->vendor;
1748 	ctlr->input->id.product = hdev->product;
1749 	ctlr->input->id.version = hdev->version;
1750 	ctlr->input->uniq = ctlr->mac_addr_str;
1751 	ctlr->input->name = name;
1752 	ctlr->input->phys = hdev->phys;
1753 	input_set_drvdata(ctlr->input, ctlr);
1754 
1755 	/* set up sticks and buttons */
1756 	if (jc_type_has_left(ctlr)) {
1757 		input_set_abs_params(ctlr->input, ABS_X,
1758 				     -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
1759 				     JC_STICK_FUZZ, JC_STICK_FLAT);
1760 		input_set_abs_params(ctlr->input, ABS_Y,
1761 				     -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
1762 				     JC_STICK_FUZZ, JC_STICK_FLAT);
1763 
1764 		for (i = 0; joycon_button_inputs_l[i] > 0; i++)
1765 			input_set_capability(ctlr->input, EV_KEY,
1766 					     joycon_button_inputs_l[i]);
1767 
1768 		/* configure d-pad differently for joy-con vs pro controller */
1769 		if (hdev->product != USB_DEVICE_ID_NINTENDO_PROCON) {
1770 			for (i = 0; joycon_dpad_inputs_jc[i] > 0; i++)
1771 				input_set_capability(ctlr->input, EV_KEY,
1772 						     joycon_dpad_inputs_jc[i]);
1773 		} else {
1774 			input_set_abs_params(ctlr->input, ABS_HAT0X,
1775 					     -JC_MAX_DPAD_MAG, JC_MAX_DPAD_MAG,
1776 					     JC_DPAD_FUZZ, JC_DPAD_FLAT);
1777 			input_set_abs_params(ctlr->input, ABS_HAT0Y,
1778 					     -JC_MAX_DPAD_MAG, JC_MAX_DPAD_MAG,
1779 					     JC_DPAD_FUZZ, JC_DPAD_FLAT);
1780 		}
1781 	}
1782 	if (jc_type_has_right(ctlr)) {
1783 		input_set_abs_params(ctlr->input, ABS_RX,
1784 				     -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
1785 				     JC_STICK_FUZZ, JC_STICK_FLAT);
1786 		input_set_abs_params(ctlr->input, ABS_RY,
1787 				     -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
1788 				     JC_STICK_FUZZ, JC_STICK_FLAT);
1789 
1790 		for (i = 0; joycon_button_inputs_r[i] > 0; i++)
1791 			input_set_capability(ctlr->input, EV_KEY,
1792 					     joycon_button_inputs_r[i]);
1793 	}
1794 
1795 	/* Let's report joy-con S triggers separately */
1796 	if (hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONL) {
1797 		input_set_capability(ctlr->input, EV_KEY, BTN_TR);
1798 		input_set_capability(ctlr->input, EV_KEY, BTN_TR2);
1799 	} else if (hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONR) {
1800 		input_set_capability(ctlr->input, EV_KEY, BTN_TL);
1801 		input_set_capability(ctlr->input, EV_KEY, BTN_TL2);
1802 	}
1803 
1804 #if IS_ENABLED(CONFIG_NINTENDO_FF)
1805 	/* set up rumble */
1806 	input_set_capability(ctlr->input, EV_FF, FF_RUMBLE);
1807 	input_ff_create_memless(ctlr->input, NULL, joycon_play_effect);
1808 	ctlr->rumble_ll_freq = JC_RUMBLE_DFLT_LOW_FREQ;
1809 	ctlr->rumble_lh_freq = JC_RUMBLE_DFLT_HIGH_FREQ;
1810 	ctlr->rumble_rl_freq = JC_RUMBLE_DFLT_LOW_FREQ;
1811 	ctlr->rumble_rh_freq = JC_RUMBLE_DFLT_HIGH_FREQ;
1812 	joycon_clamp_rumble_freqs(ctlr);
1813 	joycon_set_rumble(ctlr, 0, 0, false);
1814 	ctlr->rumble_msecs = jiffies_to_msecs(jiffies);
1815 #endif
1816 
1817 	ret = input_register_device(ctlr->input);
1818 	if (ret)
1819 		return ret;
1820 
1821 	/* configure the imu input device */
1822 	ctlr->imu_input = devm_input_allocate_device(&hdev->dev);
1823 	if (!ctlr->imu_input)
1824 		return -ENOMEM;
1825 
1826 	ctlr->imu_input->id.bustype = hdev->bus;
1827 	ctlr->imu_input->id.vendor = hdev->vendor;
1828 	ctlr->imu_input->id.product = hdev->product;
1829 	ctlr->imu_input->id.version = hdev->version;
1830 	ctlr->imu_input->uniq = ctlr->mac_addr_str;
1831 	ctlr->imu_input->name = imu_name;
1832 	ctlr->imu_input->phys = hdev->phys;
1833 	input_set_drvdata(ctlr->imu_input, ctlr);
1834 
1835 	/* configure imu axes */
1836 	input_set_abs_params(ctlr->imu_input, ABS_X,
1837 			     -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
1838 			     JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
1839 	input_set_abs_params(ctlr->imu_input, ABS_Y,
1840 			     -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
1841 			     JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
1842 	input_set_abs_params(ctlr->imu_input, ABS_Z,
1843 			     -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
1844 			     JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
1845 	input_abs_set_res(ctlr->imu_input, ABS_X, JC_IMU_ACCEL_RES_PER_G);
1846 	input_abs_set_res(ctlr->imu_input, ABS_Y, JC_IMU_ACCEL_RES_PER_G);
1847 	input_abs_set_res(ctlr->imu_input, ABS_Z, JC_IMU_ACCEL_RES_PER_G);
1848 
1849 	input_set_abs_params(ctlr->imu_input, ABS_RX,
1850 			     -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
1851 			     JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
1852 	input_set_abs_params(ctlr->imu_input, ABS_RY,
1853 			     -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
1854 			     JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
1855 	input_set_abs_params(ctlr->imu_input, ABS_RZ,
1856 			     -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
1857 			     JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
1858 
1859 	input_abs_set_res(ctlr->imu_input, ABS_RX, JC_IMU_GYRO_RES_PER_DPS);
1860 	input_abs_set_res(ctlr->imu_input, ABS_RY, JC_IMU_GYRO_RES_PER_DPS);
1861 	input_abs_set_res(ctlr->imu_input, ABS_RZ, JC_IMU_GYRO_RES_PER_DPS);
1862 
1863 	__set_bit(EV_MSC, ctlr->imu_input->evbit);
1864 	__set_bit(MSC_TIMESTAMP, ctlr->imu_input->mscbit);
1865 	__set_bit(INPUT_PROP_ACCELEROMETER, ctlr->imu_input->propbit);
1866 
1867 	ret = input_register_device(ctlr->imu_input);
1868 	if (ret)
1869 		return ret;
1870 
1871 	return 0;
1872 }
1873 
1874 /* Because the subcommand sets all the leds at once, the brightness argument is ignored */
1875 static int joycon_player_led_brightness_set(struct led_classdev *led,
1876 					    enum led_brightness brightness)
1877 {
1878 	struct device *dev = led->dev->parent;
1879 	struct hid_device *hdev = to_hid_device(dev);
1880 	struct joycon_ctlr *ctlr;
1881 	int val = 0;
1882 	int i;
1883 	int ret;
1884 
1885 	ctlr = hid_get_drvdata(hdev);
1886 	if (!ctlr) {
1887 		hid_err(hdev, "No controller data\n");
1888 		return -ENODEV;
1889 	}
1890 
1891 	for (i = 0; i < JC_NUM_LEDS; i++)
1892 		val |= ctlr->leds[i].brightness << i;
1893 
1894 	mutex_lock(&ctlr->output_mutex);
1895 	ret = joycon_set_player_leds(ctlr, 0, val);
1896 	mutex_unlock(&ctlr->output_mutex);
1897 
1898 	return ret;
1899 }
1900 
1901 static int joycon_home_led_brightness_set(struct led_classdev *led,
1902 					  enum led_brightness brightness)
1903 {
1904 	struct device *dev = led->dev->parent;
1905 	struct hid_device *hdev = to_hid_device(dev);
1906 	struct joycon_ctlr *ctlr;
1907 	int ret;
1908 
1909 	ctlr = hid_get_drvdata(hdev);
1910 	if (!ctlr) {
1911 		hid_err(hdev, "No controller data\n");
1912 		return -ENODEV;
1913 	}
1914 	mutex_lock(&ctlr->output_mutex);
1915 	ret = joycon_set_home_led(ctlr, brightness);
1916 	mutex_unlock(&ctlr->output_mutex);
1917 	return ret;
1918 }
1919 
1920 static DEFINE_SPINLOCK(joycon_input_num_spinlock);
1921 static int joycon_leds_create(struct joycon_ctlr *ctlr)
1922 {
1923 	struct hid_device *hdev = ctlr->hdev;
1924 	struct device *dev = &hdev->dev;
1925 	const char *d_name = dev_name(dev);
1926 	struct led_classdev *led;
1927 	int led_val = 0;
1928 	char *name;
1929 	int ret;
1930 	int i;
1931 	unsigned long flags;
1932 	int player_led_pattern;
1933 	static int input_num;
1934 
1935 	/*
1936 	 * Set the player leds based on controller number
1937 	 * Because there is no standard concept of "player number", the pattern
1938 	 * number will simply increase by 1 every time a controller is connected.
1939 	 */
1940 	spin_lock_irqsave(&joycon_input_num_spinlock, flags);
1941 	player_led_pattern = input_num++ % JC_NUM_LED_PATTERNS;
1942 	spin_unlock_irqrestore(&joycon_input_num_spinlock, flags);
1943 
1944 	/* configure the player LEDs */
1945 	for (i = 0; i < JC_NUM_LEDS; i++) {
1946 		name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s:%s",
1947 				      d_name,
1948 				      "green",
1949 				      joycon_player_led_names[i]);
1950 		if (!name)
1951 			return -ENOMEM;
1952 
1953 		led = &ctlr->leds[i];
1954 		led->name = name;
1955 		led->brightness = joycon_player_led_patterns[player_led_pattern][i];
1956 		led->max_brightness = 1;
1957 		led->brightness_set_blocking =
1958 					joycon_player_led_brightness_set;
1959 		led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE;
1960 
1961 		led_val |= joycon_player_led_patterns[player_led_pattern][i] << i;
1962 	}
1963 	mutex_lock(&ctlr->output_mutex);
1964 	ret = joycon_set_player_leds(ctlr, 0, led_val);
1965 	mutex_unlock(&ctlr->output_mutex);
1966 	if (ret) {
1967 		hid_warn(hdev, "Failed to set players LEDs, skipping registration; ret=%d\n", ret);
1968 		goto home_led;
1969 	}
1970 
1971 	for (i = 0; i < JC_NUM_LEDS; i++) {
1972 		led = &ctlr->leds[i];
1973 		ret = devm_led_classdev_register(&hdev->dev, led);
1974 		if (ret) {
1975 			hid_err(hdev, "Failed to register player %d LED; ret=%d\n", i + 1, ret);
1976 			return ret;
1977 		}
1978 	}
1979 
1980 home_led:
1981 	/* configure the home LED */
1982 	if (jc_type_has_right(ctlr)) {
1983 		name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s:%s",
1984 				      d_name,
1985 				      "blue",
1986 				      LED_FUNCTION_PLAYER5);
1987 		if (!name)
1988 			return -ENOMEM;
1989 
1990 		led = &ctlr->home_led;
1991 		led->name = name;
1992 		led->brightness = 0;
1993 		led->max_brightness = 0xF;
1994 		led->brightness_set_blocking = joycon_home_led_brightness_set;
1995 		led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE;
1996 
1997 		/* Set the home LED to 0 as default state */
1998 		mutex_lock(&ctlr->output_mutex);
1999 		ret = joycon_set_home_led(ctlr, 0);
2000 		mutex_unlock(&ctlr->output_mutex);
2001 		if (ret) {
2002 			hid_warn(hdev, "Failed to set home LED, skipping registration; ret=%d\n", ret);
2003 			return 0;
2004 		}
2005 
2006 		ret = devm_led_classdev_register(&hdev->dev, led);
2007 		if (ret) {
2008 			hid_err(hdev, "Failed to register home LED; ret=%d\n", ret);
2009 			return ret;
2010 		}
2011 	}
2012 
2013 	return 0;
2014 }
2015 
2016 static int joycon_battery_get_property(struct power_supply *supply,
2017 				       enum power_supply_property prop,
2018 				       union power_supply_propval *val)
2019 {
2020 	struct joycon_ctlr *ctlr = power_supply_get_drvdata(supply);
2021 	unsigned long flags;
2022 	int ret = 0;
2023 	u8 capacity;
2024 	bool charging;
2025 	bool powered;
2026 
2027 	spin_lock_irqsave(&ctlr->lock, flags);
2028 	capacity = ctlr->battery_capacity;
2029 	charging = ctlr->battery_charging;
2030 	powered = ctlr->host_powered;
2031 	spin_unlock_irqrestore(&ctlr->lock, flags);
2032 
2033 	switch (prop) {
2034 	case POWER_SUPPLY_PROP_PRESENT:
2035 		val->intval = 1;
2036 		break;
2037 	case POWER_SUPPLY_PROP_SCOPE:
2038 		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
2039 		break;
2040 	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
2041 		val->intval = capacity;
2042 		break;
2043 	case POWER_SUPPLY_PROP_STATUS:
2044 		if (charging)
2045 			val->intval = POWER_SUPPLY_STATUS_CHARGING;
2046 		else if (capacity == POWER_SUPPLY_CAPACITY_LEVEL_FULL &&
2047 			 powered)
2048 			val->intval = POWER_SUPPLY_STATUS_FULL;
2049 		else
2050 			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
2051 		break;
2052 	default:
2053 		ret = -EINVAL;
2054 		break;
2055 	}
2056 	return ret;
2057 }
2058 
2059 static enum power_supply_property joycon_battery_props[] = {
2060 	POWER_SUPPLY_PROP_PRESENT,
2061 	POWER_SUPPLY_PROP_CAPACITY_LEVEL,
2062 	POWER_SUPPLY_PROP_SCOPE,
2063 	POWER_SUPPLY_PROP_STATUS,
2064 };
2065 
2066 static int joycon_power_supply_create(struct joycon_ctlr *ctlr)
2067 {
2068 	struct hid_device *hdev = ctlr->hdev;
2069 	struct power_supply_config supply_config = { .drv_data = ctlr, };
2070 	const char * const name_fmt = "nintendo_switch_controller_battery_%s";
2071 	int ret = 0;
2072 
2073 	/* Set initially to unknown before receiving first input report */
2074 	ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
2075 
2076 	/* Configure the battery's description */
2077 	ctlr->battery_desc.properties = joycon_battery_props;
2078 	ctlr->battery_desc.num_properties =
2079 					ARRAY_SIZE(joycon_battery_props);
2080 	ctlr->battery_desc.get_property = joycon_battery_get_property;
2081 	ctlr->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
2082 	ctlr->battery_desc.use_for_apm = 0;
2083 	ctlr->battery_desc.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
2084 						 name_fmt,
2085 						 dev_name(&hdev->dev));
2086 	if (!ctlr->battery_desc.name)
2087 		return -ENOMEM;
2088 
2089 	ctlr->battery = devm_power_supply_register(&hdev->dev,
2090 						   &ctlr->battery_desc,
2091 						   &supply_config);
2092 	if (IS_ERR(ctlr->battery)) {
2093 		ret = PTR_ERR(ctlr->battery);
2094 		hid_err(hdev, "Failed to register battery; ret=%d\n", ret);
2095 		return ret;
2096 	}
2097 
2098 	return power_supply_powers(ctlr->battery, &hdev->dev);
2099 }
2100 
2101 static int joycon_read_info(struct joycon_ctlr *ctlr)
2102 {
2103 	int ret;
2104 	int i;
2105 	int j;
2106 	struct joycon_subcmd_request req = { 0 };
2107 	struct joycon_input_report *report;
2108 
2109 	req.subcmd_id = JC_SUBCMD_REQ_DEV_INFO;
2110 	mutex_lock(&ctlr->output_mutex);
2111 	ret = joycon_send_subcmd(ctlr, &req, 0, HZ);
2112 	mutex_unlock(&ctlr->output_mutex);
2113 	if (ret) {
2114 		hid_err(ctlr->hdev, "Failed to get joycon info; ret=%d\n", ret);
2115 		return ret;
2116 	}
2117 
2118 	report = (struct joycon_input_report *)ctlr->input_buf;
2119 
2120 	for (i = 4, j = 0; j < 6; i++, j++)
2121 		ctlr->mac_addr[j] = report->subcmd_reply.data[i];
2122 
2123 	ctlr->mac_addr_str = devm_kasprintf(&ctlr->hdev->dev, GFP_KERNEL,
2124 					    "%02X:%02X:%02X:%02X:%02X:%02X",
2125 					    ctlr->mac_addr[0],
2126 					    ctlr->mac_addr[1],
2127 					    ctlr->mac_addr[2],
2128 					    ctlr->mac_addr[3],
2129 					    ctlr->mac_addr[4],
2130 					    ctlr->mac_addr[5]);
2131 	if (!ctlr->mac_addr_str)
2132 		return -ENOMEM;
2133 	hid_info(ctlr->hdev, "controller MAC = %s\n", ctlr->mac_addr_str);
2134 
2135 	/* Retrieve the type so we can distinguish for charging grip */
2136 	ctlr->ctlr_type = report->subcmd_reply.data[2];
2137 
2138 	return 0;
2139 }
2140 
2141 static int joycon_init(struct hid_device *hdev)
2142 {
2143 	struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
2144 	int ret = 0;
2145 
2146 	mutex_lock(&ctlr->output_mutex);
2147 	/* if handshake command fails, assume ble pro controller */
2148 	if ((jc_type_is_procon(ctlr) || jc_type_is_chrggrip(ctlr)) &&
2149 	    !joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ)) {
2150 		hid_dbg(hdev, "detected USB controller\n");
2151 		/* set baudrate for improved latency */
2152 		ret = joycon_send_usb(ctlr, JC_USB_CMD_BAUDRATE_3M, HZ);
2153 		if (ret) {
2154 			hid_err(hdev, "Failed to set baudrate; ret=%d\n", ret);
2155 			goto out_unlock;
2156 		}
2157 		/* handshake */
2158 		ret = joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ);
2159 		if (ret) {
2160 			hid_err(hdev, "Failed handshake; ret=%d\n", ret);
2161 			goto out_unlock;
2162 		}
2163 		/*
2164 		 * Set no timeout (to keep controller in USB mode).
2165 		 * This doesn't send a response, so ignore the timeout.
2166 		 */
2167 		joycon_send_usb(ctlr, JC_USB_CMD_NO_TIMEOUT, HZ/10);
2168 	} else if (jc_type_is_chrggrip(ctlr)) {
2169 		hid_err(hdev, "Failed charging grip handshake\n");
2170 		ret = -ETIMEDOUT;
2171 		goto out_unlock;
2172 	}
2173 
2174 	/* get controller calibration data, and parse it */
2175 	ret = joycon_request_calibration(ctlr);
2176 	if (ret) {
2177 		/*
2178 		 * We can function with default calibration, but it may be
2179 		 * inaccurate. Provide a warning, and continue on.
2180 		 */
2181 		hid_warn(hdev, "Analog stick positions may be inaccurate\n");
2182 	}
2183 
2184 	/* get IMU calibration data, and parse it */
2185 	ret = joycon_request_imu_calibration(ctlr);
2186 	if (ret) {
2187 		/*
2188 		 * We can function with default calibration, but it may be
2189 		 * inaccurate. Provide a warning, and continue on.
2190 		 */
2191 		hid_warn(hdev, "Unable to read IMU calibration data\n");
2192 	}
2193 
2194 	/* Set the reporting mode to 0x30, which is the full report mode */
2195 	ret = joycon_set_report_mode(ctlr);
2196 	if (ret) {
2197 		hid_err(hdev, "Failed to set report mode; ret=%d\n", ret);
2198 		goto out_unlock;
2199 	}
2200 
2201 	/* Enable rumble */
2202 	ret = joycon_enable_rumble(ctlr);
2203 	if (ret) {
2204 		hid_err(hdev, "Failed to enable rumble; ret=%d\n", ret);
2205 		goto out_unlock;
2206 	}
2207 
2208 	/* Enable the IMU */
2209 	ret = joycon_enable_imu(ctlr);
2210 	if (ret) {
2211 		hid_err(hdev, "Failed to enable the IMU; ret=%d\n", ret);
2212 		goto out_unlock;
2213 	}
2214 
2215 out_unlock:
2216 	mutex_unlock(&ctlr->output_mutex);
2217 	return ret;
2218 }
2219 
2220 /* Common handler for parsing inputs */
2221 static int joycon_ctlr_read_handler(struct joycon_ctlr *ctlr, u8 *data,
2222 							      int size)
2223 {
2224 	if (data[0] == JC_INPUT_SUBCMD_REPLY || data[0] == JC_INPUT_IMU_DATA ||
2225 	    data[0] == JC_INPUT_MCU_DATA) {
2226 		if (size >= 12) /* make sure it contains the input report */
2227 			joycon_parse_report(ctlr,
2228 					    (struct joycon_input_report *)data);
2229 	}
2230 
2231 	return 0;
2232 }
2233 
2234 static int joycon_ctlr_handle_event(struct joycon_ctlr *ctlr, u8 *data,
2235 							      int size)
2236 {
2237 	int ret = 0;
2238 	bool match = false;
2239 	struct joycon_input_report *report;
2240 
2241 	if (unlikely(mutex_is_locked(&ctlr->output_mutex)) &&
2242 	    ctlr->msg_type != JOYCON_MSG_TYPE_NONE) {
2243 		switch (ctlr->msg_type) {
2244 		case JOYCON_MSG_TYPE_USB:
2245 			if (size < 2)
2246 				break;
2247 			if (data[0] == JC_INPUT_USB_RESPONSE &&
2248 			    data[1] == ctlr->usb_ack_match)
2249 				match = true;
2250 			break;
2251 		case JOYCON_MSG_TYPE_SUBCMD:
2252 			if (size < sizeof(struct joycon_input_report) ||
2253 			    data[0] != JC_INPUT_SUBCMD_REPLY)
2254 				break;
2255 			report = (struct joycon_input_report *)data;
2256 			if (report->subcmd_reply.id == ctlr->subcmd_ack_match)
2257 				match = true;
2258 			break;
2259 		default:
2260 			break;
2261 		}
2262 
2263 		if (match) {
2264 			memcpy(ctlr->input_buf, data,
2265 			       min(size, (int)JC_MAX_RESP_SIZE));
2266 			ctlr->msg_type = JOYCON_MSG_TYPE_NONE;
2267 			ctlr->received_resp = true;
2268 			wake_up(&ctlr->wait);
2269 
2270 			/* This message has been handled */
2271 			return 1;
2272 		}
2273 	}
2274 
2275 	if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ)
2276 		ret = joycon_ctlr_read_handler(ctlr, data, size);
2277 
2278 	return ret;
2279 }
2280 
2281 static int nintendo_hid_event(struct hid_device *hdev,
2282 			      struct hid_report *report, u8 *raw_data, int size)
2283 {
2284 	struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
2285 
2286 	if (size < 1)
2287 		return -EINVAL;
2288 
2289 	return joycon_ctlr_handle_event(ctlr, raw_data, size);
2290 }
2291 
2292 static int nintendo_hid_probe(struct hid_device *hdev,
2293 			    const struct hid_device_id *id)
2294 {
2295 	int ret;
2296 	struct joycon_ctlr *ctlr;
2297 
2298 	hid_dbg(hdev, "probe - start\n");
2299 
2300 	ctlr = devm_kzalloc(&hdev->dev, sizeof(*ctlr), GFP_KERNEL);
2301 	if (!ctlr) {
2302 		ret = -ENOMEM;
2303 		goto err;
2304 	}
2305 
2306 	ctlr->hdev = hdev;
2307 	ctlr->ctlr_state = JOYCON_CTLR_STATE_INIT;
2308 	ctlr->rumble_queue_head = 0;
2309 	ctlr->rumble_queue_tail = 0;
2310 	hid_set_drvdata(hdev, ctlr);
2311 	mutex_init(&ctlr->output_mutex);
2312 	init_waitqueue_head(&ctlr->wait);
2313 	spin_lock_init(&ctlr->lock);
2314 	ctlr->rumble_queue = alloc_workqueue("hid-nintendo-rumble_wq",
2315 					     WQ_FREEZABLE | WQ_MEM_RECLAIM, 0);
2316 	if (!ctlr->rumble_queue) {
2317 		ret = -ENOMEM;
2318 		goto err;
2319 	}
2320 	INIT_WORK(&ctlr->rumble_worker, joycon_rumble_worker);
2321 
2322 	ret = hid_parse(hdev);
2323 	if (ret) {
2324 		hid_err(hdev, "HID parse failed\n");
2325 		goto err_wq;
2326 	}
2327 
2328 	/*
2329 	 * Patch the hw version of pro controller/joycons, so applications can
2330 	 * distinguish between the default HID mappings and the mappings defined
2331 	 * by the Linux game controller spec. This is important for the SDL2
2332 	 * library, which has a game controller database, which uses device ids
2333 	 * in combination with version as a key.
2334 	 */
2335 	hdev->version |= 0x8000;
2336 
2337 	ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
2338 	if (ret) {
2339 		hid_err(hdev, "HW start failed\n");
2340 		goto err_wq;
2341 	}
2342 
2343 	ret = hid_hw_open(hdev);
2344 	if (ret) {
2345 		hid_err(hdev, "cannot start hardware I/O\n");
2346 		goto err_stop;
2347 	}
2348 
2349 	hid_device_io_start(hdev);
2350 
2351 	ret = joycon_init(hdev);
2352 	if (ret) {
2353 		hid_err(hdev, "Failed to initialize controller; ret=%d\n", ret);
2354 		goto err_close;
2355 	}
2356 
2357 	ret = joycon_read_info(ctlr);
2358 	if (ret) {
2359 		hid_err(hdev, "Failed to retrieve controller info; ret=%d\n",
2360 			ret);
2361 		goto err_close;
2362 	}
2363 
2364 	/* Initialize the leds */
2365 	ret = joycon_leds_create(ctlr);
2366 	if (ret) {
2367 		hid_err(hdev, "Failed to create leds; ret=%d\n", ret);
2368 		goto err_close;
2369 	}
2370 
2371 	/* Initialize the battery power supply */
2372 	ret = joycon_power_supply_create(ctlr);
2373 	if (ret) {
2374 		hid_err(hdev, "Failed to create power_supply; ret=%d\n", ret);
2375 		goto err_close;
2376 	}
2377 
2378 	ret = joycon_input_create(ctlr);
2379 	if (ret) {
2380 		hid_err(hdev, "Failed to create input device; ret=%d\n", ret);
2381 		goto err_close;
2382 	}
2383 
2384 	ctlr->ctlr_state = JOYCON_CTLR_STATE_READ;
2385 
2386 	hid_dbg(hdev, "probe - success\n");
2387 	return 0;
2388 
2389 err_close:
2390 	hid_hw_close(hdev);
2391 err_stop:
2392 	hid_hw_stop(hdev);
2393 err_wq:
2394 	destroy_workqueue(ctlr->rumble_queue);
2395 err:
2396 	hid_err(hdev, "probe - fail = %d\n", ret);
2397 	return ret;
2398 }
2399 
2400 static void nintendo_hid_remove(struct hid_device *hdev)
2401 {
2402 	struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
2403 	unsigned long flags;
2404 
2405 	hid_dbg(hdev, "remove\n");
2406 
2407 	/* Prevent further attempts at sending subcommands. */
2408 	spin_lock_irqsave(&ctlr->lock, flags);
2409 	ctlr->ctlr_state = JOYCON_CTLR_STATE_REMOVED;
2410 	spin_unlock_irqrestore(&ctlr->lock, flags);
2411 
2412 	destroy_workqueue(ctlr->rumble_queue);
2413 
2414 	hid_hw_close(hdev);
2415 	hid_hw_stop(hdev);
2416 }
2417 
2418 #ifdef CONFIG_PM
2419 
2420 static int nintendo_hid_resume(struct hid_device *hdev)
2421 {
2422 	int ret = joycon_init(hdev);
2423 
2424 	if (ret)
2425 		hid_err(hdev, "Failed to restore controller after resume");
2426 
2427 	return ret;
2428 }
2429 
2430 #endif
2431 
2432 static const struct hid_device_id nintendo_hid_devices[] = {
2433 	{ HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
2434 			 USB_DEVICE_ID_NINTENDO_PROCON) },
2435 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2436 			 USB_DEVICE_ID_NINTENDO_PROCON) },
2437 	{ HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
2438 			 USB_DEVICE_ID_NINTENDO_CHRGGRIP) },
2439 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2440 			 USB_DEVICE_ID_NINTENDO_JOYCONL) },
2441 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2442 			 USB_DEVICE_ID_NINTENDO_JOYCONR) },
2443 	{ }
2444 };
2445 MODULE_DEVICE_TABLE(hid, nintendo_hid_devices);
2446 
2447 static struct hid_driver nintendo_hid_driver = {
2448 	.name		= "nintendo",
2449 	.id_table	= nintendo_hid_devices,
2450 	.probe		= nintendo_hid_probe,
2451 	.remove		= nintendo_hid_remove,
2452 	.raw_event	= nintendo_hid_event,
2453 
2454 #ifdef CONFIG_PM
2455 	.resume		= nintendo_hid_resume,
2456 #endif
2457 };
2458 module_hid_driver(nintendo_hid_driver);
2459 
2460 MODULE_LICENSE("GPL");
2461 MODULE_AUTHOR("Daniel J. Ogorchock <djogorchock@gmail.com>");
2462 MODULE_DESCRIPTION("Driver for Nintendo Switch Controllers");
2463 
2464