1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * HID driver for Valve Steam Controller
4 *
5 * Copyright (c) 2018 Rodrigo Rivas Costa <rodrigorivascosta@gmail.com>
6 * Copyright (c) 2022 Valve Software
7 *
8 * Supports both the wired and wireless interfaces.
9 *
10 * This controller has a builtin emulation of mouse and keyboard: the right pad
11 * can be used as a mouse, the shoulder buttons are mouse buttons, A and B
12 * buttons are ENTER and ESCAPE, and so on. This is implemented as additional
13 * HID interfaces.
14 *
15 * This is known as the "lizard mode", because apparently lizards like to use
16 * the computer from the coach, without a proper mouse and keyboard.
17 *
18 * This driver will disable the lizard mode when the input device is opened
19 * and re-enable it when the input device is closed, so as not to break user
20 * mode behaviour. The lizard_mode parameter can be used to change that.
21 *
22 * There are a few user space applications (notably Steam Client) that use
23 * the hidraw interface directly to create input devices (XTest, uinput...).
24 * In order to avoid breaking them this driver creates a layered hidraw device,
25 * so it can detect when the client is running and then:
26 * - it will not send any command to the controller.
27 * - this input device will be removed, to avoid double input of the same
28 * user action.
29 * When the client is closed, this input device will be created again.
30 *
31 * For additional functions, such as changing the right-pad margin or switching
32 * the led, you can use the user-space tool at:
33 *
34 * https://github.com/rodrigorc/steamctrl
35 */
36
37 #include <linux/device.h>
38 #include <linux/input.h>
39 #include <linux/hid.h>
40 #include <linux/module.h>
41 #include <linux/workqueue.h>
42 #include <linux/mutex.h>
43 #include <linux/rcupdate.h>
44 #include <linux/delay.h>
45 #include <linux/power_supply.h>
46 #include "hid-ids.h"
47
48 MODULE_DESCRIPTION("HID driver for Valve Steam Controller");
49 MODULE_LICENSE("GPL");
50 MODULE_AUTHOR("Rodrigo Rivas Costa <rodrigorivascosta@gmail.com>");
51
52 static bool lizard_mode = true;
53
54 static DEFINE_MUTEX(steam_devices_lock);
55 static LIST_HEAD(steam_devices);
56
57 #define STEAM_QUIRK_WIRELESS BIT(0)
58 #define STEAM_QUIRK_DECK BIT(1)
59
60 /* Touch pads are 40 mm in diameter and 65535 units */
61 #define STEAM_PAD_RESOLUTION 1638
62 /* Trigger runs are about 5 mm and 256 units */
63 #define STEAM_TRIGGER_RESOLUTION 51
64 /* Joystick runs are about 5 mm and 256 units */
65 #define STEAM_JOYSTICK_RESOLUTION 51
66 /* Trigger runs are about 6 mm and 32768 units */
67 #define STEAM_DECK_TRIGGER_RESOLUTION 5461
68 /* Joystick runs are about 5 mm and 32768 units */
69 #define STEAM_DECK_JOYSTICK_RESOLUTION 6553
70 /* Accelerometer has 16 bit resolution and a range of +/- 2g */
71 #define STEAM_DECK_ACCEL_RES_PER_G 16384
72 #define STEAM_DECK_ACCEL_RANGE 32768
73 #define STEAM_DECK_ACCEL_FUZZ 32
74 /* Gyroscope has 16 bit resolution and a range of +/- 2000 dps */
75 #define STEAM_DECK_GYRO_RES_PER_DPS 16
76 #define STEAM_DECK_GYRO_RANGE 32768
77 #define STEAM_DECK_GYRO_FUZZ 1
78
79 #define STEAM_PAD_FUZZ 256
80
81 /*
82 * Commands that can be sent in a feature report.
83 * Thanks to Valve and SDL for the names.
84 */
85 enum {
86 ID_SET_DIGITAL_MAPPINGS = 0x80,
87 ID_CLEAR_DIGITAL_MAPPINGS = 0x81,
88 ID_GET_DIGITAL_MAPPINGS = 0x82,
89 ID_GET_ATTRIBUTES_VALUES = 0x83,
90 ID_GET_ATTRIBUTE_LABEL = 0x84,
91 ID_SET_DEFAULT_DIGITAL_MAPPINGS = 0x85,
92 ID_FACTORY_RESET = 0x86,
93 ID_SET_SETTINGS_VALUES = 0x87,
94 ID_CLEAR_SETTINGS_VALUES = 0x88,
95 ID_GET_SETTINGS_VALUES = 0x89,
96 ID_GET_SETTING_LABEL = 0x8A,
97 ID_GET_SETTINGS_MAXS = 0x8B,
98 ID_GET_SETTINGS_DEFAULTS = 0x8C,
99 ID_SET_CONTROLLER_MODE = 0x8D,
100 ID_LOAD_DEFAULT_SETTINGS = 0x8E,
101 ID_TRIGGER_HAPTIC_PULSE = 0x8F,
102 ID_TURN_OFF_CONTROLLER = 0x9F,
103
104 ID_GET_DEVICE_INFO = 0xA1,
105
106 ID_CALIBRATE_TRACKPADS = 0xA7,
107 ID_RESERVED_0 = 0xA8,
108 ID_SET_SERIAL_NUMBER = 0xA9,
109 ID_GET_TRACKPAD_CALIBRATION = 0xAA,
110 ID_GET_TRACKPAD_FACTORY_CALIBRATION = 0xAB,
111 ID_GET_TRACKPAD_RAW_DATA = 0xAC,
112 ID_ENABLE_PAIRING = 0xAD,
113 ID_GET_STRING_ATTRIBUTE = 0xAE,
114 ID_RADIO_ERASE_RECORDS = 0xAF,
115 ID_RADIO_WRITE_RECORD = 0xB0,
116 ID_SET_DONGLE_SETTING = 0xB1,
117 ID_DONGLE_DISCONNECT_DEVICE = 0xB2,
118 ID_DONGLE_COMMIT_DEVICE = 0xB3,
119 ID_DONGLE_GET_WIRELESS_STATE = 0xB4,
120 ID_CALIBRATE_GYRO = 0xB5,
121 ID_PLAY_AUDIO = 0xB6,
122 ID_AUDIO_UPDATE_START = 0xB7,
123 ID_AUDIO_UPDATE_DATA = 0xB8,
124 ID_AUDIO_UPDATE_COMPLETE = 0xB9,
125 ID_GET_CHIPID = 0xBA,
126
127 ID_CALIBRATE_JOYSTICK = 0xBF,
128 ID_CALIBRATE_ANALOG_TRIGGERS = 0xC0,
129 ID_SET_AUDIO_MAPPING = 0xC1,
130 ID_CHECK_GYRO_FW_LOAD = 0xC2,
131 ID_CALIBRATE_ANALOG = 0xC3,
132 ID_DONGLE_GET_CONNECTED_SLOTS = 0xC4,
133
134 ID_RESET_IMU = 0xCE,
135
136 ID_TRIGGER_HAPTIC_CMD = 0xEA,
137 ID_TRIGGER_RUMBLE_CMD = 0xEB,
138 };
139
140 /* Settings IDs */
141 enum {
142 /* 0 */
143 SETTING_MOUSE_SENSITIVITY,
144 SETTING_MOUSE_ACCELERATION,
145 SETTING_TRACKBALL_ROTATION_ANGLE,
146 SETTING_HAPTIC_INTENSITY_UNUSED,
147 SETTING_LEFT_GAMEPAD_STICK_ENABLED,
148 SETTING_RIGHT_GAMEPAD_STICK_ENABLED,
149 SETTING_USB_DEBUG_MODE,
150 SETTING_LEFT_TRACKPAD_MODE,
151 SETTING_RIGHT_TRACKPAD_MODE,
152 SETTING_MOUSE_POINTER_ENABLED,
153
154 /* 10 */
155 SETTING_DPAD_DEADZONE,
156 SETTING_MINIMUM_MOMENTUM_VEL,
157 SETTING_MOMENTUM_DECAY_AMMOUNT,
158 SETTING_TRACKPAD_RELATIVE_MODE_TICKS_PER_PIXEL,
159 SETTING_HAPTIC_INCREMENT,
160 SETTING_DPAD_ANGLE_SIN,
161 SETTING_DPAD_ANGLE_COS,
162 SETTING_MOMENTUM_VERTICAL_DIVISOR,
163 SETTING_MOMENTUM_MAXIMUM_VELOCITY,
164 SETTING_TRACKPAD_Z_ON,
165
166 /* 20 */
167 SETTING_TRACKPAD_Z_OFF,
168 SETTING_SENSITIVY_SCALE_AMMOUNT,
169 SETTING_LEFT_TRACKPAD_SECONDARY_MODE,
170 SETTING_RIGHT_TRACKPAD_SECONDARY_MODE,
171 SETTING_SMOOTH_ABSOLUTE_MOUSE,
172 SETTING_STEAMBUTTON_POWEROFF_TIME,
173 SETTING_UNUSED_1,
174 SETTING_TRACKPAD_OUTER_RADIUS,
175 SETTING_TRACKPAD_Z_ON_LEFT,
176 SETTING_TRACKPAD_Z_OFF_LEFT,
177
178 /* 30 */
179 SETTING_TRACKPAD_OUTER_SPIN_VEL,
180 SETTING_TRACKPAD_OUTER_SPIN_RADIUS,
181 SETTING_TRACKPAD_OUTER_SPIN_HORIZONTAL_ONLY,
182 SETTING_TRACKPAD_RELATIVE_MODE_DEADZONE,
183 SETTING_TRACKPAD_RELATIVE_MODE_MAX_VEL,
184 SETTING_TRACKPAD_RELATIVE_MODE_INVERT_Y,
185 SETTING_TRACKPAD_DOUBLE_TAP_BEEP_ENABLED,
186 SETTING_TRACKPAD_DOUBLE_TAP_BEEP_PERIOD,
187 SETTING_TRACKPAD_DOUBLE_TAP_BEEP_COUNT,
188 SETTING_TRACKPAD_OUTER_RADIUS_RELEASE_ON_TRANSITION,
189
190 /* 40 */
191 SETTING_RADIAL_MODE_ANGLE,
192 SETTING_HAPTIC_INTENSITY_MOUSE_MODE,
193 SETTING_LEFT_DPAD_REQUIRES_CLICK,
194 SETTING_RIGHT_DPAD_REQUIRES_CLICK,
195 SETTING_LED_BASELINE_BRIGHTNESS,
196 SETTING_LED_USER_BRIGHTNESS,
197 SETTING_ENABLE_RAW_JOYSTICK,
198 SETTING_ENABLE_FAST_SCAN,
199 SETTING_IMU_MODE,
200 SETTING_WIRELESS_PACKET_VERSION,
201
202 /* 50 */
203 SETTING_SLEEP_INACTIVITY_TIMEOUT,
204 SETTING_TRACKPAD_NOISE_THRESHOLD,
205 SETTING_LEFT_TRACKPAD_CLICK_PRESSURE,
206 SETTING_RIGHT_TRACKPAD_CLICK_PRESSURE,
207 SETTING_LEFT_BUMPER_CLICK_PRESSURE,
208 SETTING_RIGHT_BUMPER_CLICK_PRESSURE,
209 SETTING_LEFT_GRIP_CLICK_PRESSURE,
210 SETTING_RIGHT_GRIP_CLICK_PRESSURE,
211 SETTING_LEFT_GRIP2_CLICK_PRESSURE,
212 SETTING_RIGHT_GRIP2_CLICK_PRESSURE,
213
214 /* 60 */
215 SETTING_PRESSURE_MODE,
216 SETTING_CONTROLLER_TEST_MODE,
217 SETTING_TRIGGER_MODE,
218 SETTING_TRACKPAD_Z_THRESHOLD,
219 SETTING_FRAME_RATE,
220 SETTING_TRACKPAD_FILT_CTRL,
221 SETTING_TRACKPAD_CLIP,
222 SETTING_DEBUG_OUTPUT_SELECT,
223 SETTING_TRIGGER_THRESHOLD_PERCENT,
224 SETTING_TRACKPAD_FREQUENCY_HOPPING,
225
226 /* 70 */
227 SETTING_HAPTICS_ENABLED,
228 SETTING_STEAM_WATCHDOG_ENABLE,
229 SETTING_TIMP_TOUCH_THRESHOLD_ON,
230 SETTING_TIMP_TOUCH_THRESHOLD_OFF,
231 SETTING_FREQ_HOPPING,
232 SETTING_TEST_CONTROL,
233 SETTING_HAPTIC_MASTER_GAIN_DB,
234 SETTING_THUMB_TOUCH_THRESH,
235 SETTING_DEVICE_POWER_STATUS,
236 SETTING_HAPTIC_INTENSITY,
237
238 /* 80 */
239 SETTING_STABILIZER_ENABLED,
240 SETTING_TIMP_MODE_MTE,
241 };
242
243 /* Input report identifiers */
244 enum
245 {
246 ID_CONTROLLER_STATE = 1,
247 ID_CONTROLLER_DEBUG = 2,
248 ID_CONTROLLER_WIRELESS = 3,
249 ID_CONTROLLER_STATUS = 4,
250 ID_CONTROLLER_DEBUG2 = 5,
251 ID_CONTROLLER_SECONDARY_STATE = 6,
252 ID_CONTROLLER_BLE_STATE = 7,
253 ID_CONTROLLER_DECK_STATE = 9
254 };
255
256 /* String attribute idenitifiers */
257 enum {
258 ATTRIB_STR_BOARD_SERIAL,
259 ATTRIB_STR_UNIT_SERIAL,
260 };
261
262 /* Values for GYRO_MODE (bitmask) */
263 enum {
264 SETTING_GYRO_MODE_OFF = 0,
265 SETTING_GYRO_MODE_STEERING = BIT(0),
266 SETTING_GYRO_MODE_TILT = BIT(1),
267 SETTING_GYRO_MODE_SEND_ORIENTATION = BIT(2),
268 SETTING_GYRO_MODE_SEND_RAW_ACCEL = BIT(3),
269 SETTING_GYRO_MODE_SEND_RAW_GYRO = BIT(4),
270 };
271
272 /* Trackpad modes */
273 enum {
274 TRACKPAD_ABSOLUTE_MOUSE,
275 TRACKPAD_RELATIVE_MOUSE,
276 TRACKPAD_DPAD_FOUR_WAY_DISCRETE,
277 TRACKPAD_DPAD_FOUR_WAY_OVERLAP,
278 TRACKPAD_DPAD_EIGHT_WAY,
279 TRACKPAD_RADIAL_MODE,
280 TRACKPAD_ABSOLUTE_DPAD,
281 TRACKPAD_NONE,
282 TRACKPAD_GESTURE_KEYBOARD,
283 };
284
285 /* Pad identifiers for the deck */
286 #define STEAM_PAD_LEFT 0
287 #define STEAM_PAD_RIGHT 1
288 #define STEAM_PAD_BOTH 2
289
290 /* Other random constants */
291 #define STEAM_SERIAL_LEN 0x15
292
293 struct steam_device {
294 struct list_head list;
295 spinlock_t lock;
296 struct hid_device *hdev, *client_hdev;
297 struct mutex report_mutex;
298 unsigned long client_opened;
299 struct input_dev __rcu *input;
300 struct input_dev __rcu *sensors;
301 unsigned long quirks;
302 struct work_struct work_connect;
303 bool connected;
304 char serial_no[STEAM_SERIAL_LEN + 1];
305 struct power_supply_desc battery_desc;
306 struct power_supply __rcu *battery;
307 u8 battery_charge;
308 u16 voltage;
309 struct delayed_work mode_switch;
310 bool did_mode_switch;
311 bool gamepad_mode;
312 struct work_struct rumble_work;
313 u16 rumble_left;
314 u16 rumble_right;
315 unsigned int sensor_timestamp_us;
316 };
317
steam_recv_report(struct steam_device * steam,u8 * data,int size)318 static int steam_recv_report(struct steam_device *steam,
319 u8 *data, int size)
320 {
321 struct hid_report *r;
322 u8 *buf;
323 int ret;
324
325 r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0];
326 if (!r) {
327 hid_err(steam->hdev, "No HID_FEATURE_REPORT submitted - nothing to read\n");
328 return -EINVAL;
329 }
330
331 if (hid_report_len(r) < 64)
332 return -EINVAL;
333
334 buf = hid_alloc_report_buf(r, GFP_KERNEL);
335 if (!buf)
336 return -ENOMEM;
337
338 /*
339 * The report ID is always 0, so strip the first byte from the output.
340 * hid_report_len() is not counting the report ID, so +1 to the length
341 * or else we get a EOVERFLOW. We are safe from a buffer overflow
342 * because hid_alloc_report_buf() allocates +7 bytes.
343 */
344 ret = hid_hw_raw_request(steam->hdev, 0x00,
345 buf, hid_report_len(r) + 1,
346 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
347 if (ret > 0)
348 memcpy(data, buf + 1, min(size, ret - 1));
349 kfree(buf);
350 return ret;
351 }
352
steam_send_report(struct steam_device * steam,u8 * cmd,int size)353 static int steam_send_report(struct steam_device *steam,
354 u8 *cmd, int size)
355 {
356 struct hid_report *r;
357 u8 *buf;
358 unsigned int retries = 50;
359 int ret;
360
361 r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0];
362 if (!r) {
363 hid_err(steam->hdev, "No HID_FEATURE_REPORT submitted - nothing to read\n");
364 return -EINVAL;
365 }
366
367 if (hid_report_len(r) < 64)
368 return -EINVAL;
369
370 buf = hid_alloc_report_buf(r, GFP_KERNEL);
371 if (!buf)
372 return -ENOMEM;
373
374 /* The report ID is always 0 */
375 memcpy(buf + 1, cmd, size);
376
377 /*
378 * Sometimes the wireless controller fails with EPIPE
379 * when sending a feature report.
380 * Doing a HID_REQ_GET_REPORT and waiting for a while
381 * seems to fix that.
382 */
383 do {
384 ret = hid_hw_raw_request(steam->hdev, 0,
385 buf, max(size, 64) + 1,
386 HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
387 if (ret != -EPIPE)
388 break;
389 msleep(20);
390 } while (--retries);
391
392 kfree(buf);
393 if (ret < 0)
394 hid_err(steam->hdev, "%s: error %d (%*ph)\n", __func__,
395 ret, size, cmd);
396 return ret;
397 }
398
steam_send_report_byte(struct steam_device * steam,u8 cmd)399 static inline int steam_send_report_byte(struct steam_device *steam, u8 cmd)
400 {
401 return steam_send_report(steam, &cmd, 1);
402 }
403
steam_write_settings(struct steam_device * steam,...)404 static int steam_write_settings(struct steam_device *steam,
405 /* u8 reg, u16 val */...)
406 {
407 /* Send: 0x87 len (reg valLo valHi)* */
408 u8 reg;
409 u16 val;
410 u8 cmd[64] = {ID_SET_SETTINGS_VALUES, 0x00};
411 int ret;
412 va_list args;
413
414 va_start(args, steam);
415 for (;;) {
416 reg = va_arg(args, int);
417 if (reg == 0)
418 break;
419 val = va_arg(args, int);
420 cmd[cmd[1] + 2] = reg;
421 cmd[cmd[1] + 3] = val & 0xff;
422 cmd[cmd[1] + 4] = val >> 8;
423 cmd[1] += 3;
424 }
425 va_end(args);
426
427 ret = steam_send_report(steam, cmd, 2 + cmd[1]);
428 if (ret < 0)
429 return ret;
430
431 /*
432 * Sometimes a lingering report for this command can
433 * get read back instead of the last set report if
434 * this isn't explicitly queried
435 */
436 return steam_recv_report(steam, cmd, 2 + cmd[1]);
437 }
438
steam_get_serial(struct steam_device * steam)439 static int steam_get_serial(struct steam_device *steam)
440 {
441 /*
442 * Send: 0xae 0x15 0x01
443 * Recv: 0xae 0x15 0x01 serialnumber
444 */
445 int ret = 0;
446 u8 cmd[] = {ID_GET_STRING_ATTRIBUTE, sizeof(steam->serial_no), ATTRIB_STR_UNIT_SERIAL};
447 u8 reply[3 + STEAM_SERIAL_LEN + 1];
448
449 mutex_lock(&steam->report_mutex);
450 ret = steam_send_report(steam, cmd, sizeof(cmd));
451 if (ret < 0)
452 goto out;
453 ret = steam_recv_report(steam, reply, sizeof(reply));
454 if (ret < 0)
455 goto out;
456 if (reply[0] != ID_GET_STRING_ATTRIBUTE || reply[1] < 1 ||
457 reply[1] > sizeof(steam->serial_no) || reply[2] != ATTRIB_STR_UNIT_SERIAL) {
458 ret = -EIO;
459 goto out;
460 }
461 reply[3 + STEAM_SERIAL_LEN] = 0;
462 strscpy(steam->serial_no, reply + 3, reply[1]);
463 out:
464 mutex_unlock(&steam->report_mutex);
465 return ret;
466 }
467
468 /*
469 * This command requests the wireless adaptor to post an event
470 * with the connection status. Useful if this driver is loaded when
471 * the controller is already connected.
472 */
steam_request_conn_status(struct steam_device * steam)473 static inline int steam_request_conn_status(struct steam_device *steam)
474 {
475 int ret;
476 mutex_lock(&steam->report_mutex);
477 ret = steam_send_report_byte(steam, ID_DONGLE_GET_WIRELESS_STATE);
478 mutex_unlock(&steam->report_mutex);
479 return ret;
480 }
481
482 /*
483 * Send a haptic pulse to the trackpads
484 * Duration and interval are measured in microseconds, count is the number
485 * of pulses to send for duration time with interval microseconds between them
486 * and gain is measured in decibels, ranging from -24 to +6
487 */
steam_haptic_pulse(struct steam_device * steam,u8 pad,u16 duration,u16 interval,u16 count,u8 gain)488 static inline int steam_haptic_pulse(struct steam_device *steam, u8 pad,
489 u16 duration, u16 interval, u16 count, u8 gain)
490 {
491 int ret;
492 u8 report[10] = {ID_TRIGGER_HAPTIC_PULSE, 8};
493
494 /* Left and right are swapped on this report for legacy reasons */
495 if (pad < STEAM_PAD_BOTH)
496 pad ^= 1;
497
498 report[2] = pad;
499 report[3] = duration & 0xFF;
500 report[4] = duration >> 8;
501 report[5] = interval & 0xFF;
502 report[6] = interval >> 8;
503 report[7] = count & 0xFF;
504 report[8] = count >> 8;
505 report[9] = gain;
506
507 mutex_lock(&steam->report_mutex);
508 ret = steam_send_report(steam, report, sizeof(report));
509 mutex_unlock(&steam->report_mutex);
510 return ret;
511 }
512
steam_haptic_rumble(struct steam_device * steam,u16 intensity,u16 left_speed,u16 right_speed,u8 left_gain,u8 right_gain)513 static inline int steam_haptic_rumble(struct steam_device *steam,
514 u16 intensity, u16 left_speed, u16 right_speed,
515 u8 left_gain, u8 right_gain)
516 {
517 int ret;
518 u8 report[11] = {ID_TRIGGER_RUMBLE_CMD, 9};
519
520 report[3] = intensity & 0xFF;
521 report[4] = intensity >> 8;
522 report[5] = left_speed & 0xFF;
523 report[6] = left_speed >> 8;
524 report[7] = right_speed & 0xFF;
525 report[8] = right_speed >> 8;
526 report[9] = left_gain;
527 report[10] = right_gain;
528
529 mutex_lock(&steam->report_mutex);
530 ret = steam_send_report(steam, report, sizeof(report));
531 mutex_unlock(&steam->report_mutex);
532 return ret;
533 }
534
steam_haptic_rumble_cb(struct work_struct * work)535 static void steam_haptic_rumble_cb(struct work_struct *work)
536 {
537 struct steam_device *steam = container_of(work, struct steam_device,
538 rumble_work);
539 steam_haptic_rumble(steam, 0, steam->rumble_left,
540 steam->rumble_right, 2, 0);
541 }
542
543 #ifdef CONFIG_STEAM_FF
steam_play_effect(struct input_dev * dev,void * data,struct ff_effect * effect)544 static int steam_play_effect(struct input_dev *dev, void *data,
545 struct ff_effect *effect)
546 {
547 struct steam_device *steam = input_get_drvdata(dev);
548
549 steam->rumble_left = effect->u.rumble.strong_magnitude;
550 steam->rumble_right = effect->u.rumble.weak_magnitude;
551
552 return schedule_work(&steam->rumble_work);
553 }
554 #endif
555
steam_set_lizard_mode(struct steam_device * steam,bool enable)556 static void steam_set_lizard_mode(struct steam_device *steam, bool enable)
557 {
558 if (steam->gamepad_mode)
559 enable = false;
560
561 if (enable) {
562 mutex_lock(&steam->report_mutex);
563 /* enable esc, enter, cursors */
564 steam_send_report_byte(steam, ID_SET_DEFAULT_DIGITAL_MAPPINGS);
565 /* reset settings */
566 steam_send_report_byte(steam, ID_LOAD_DEFAULT_SETTINGS);
567 mutex_unlock(&steam->report_mutex);
568 } else {
569 mutex_lock(&steam->report_mutex);
570 /* disable esc, enter, cursor */
571 steam_send_report_byte(steam, ID_CLEAR_DIGITAL_MAPPINGS);
572
573 if (steam->quirks & STEAM_QUIRK_DECK) {
574 steam_write_settings(steam,
575 SETTING_LEFT_TRACKPAD_MODE, TRACKPAD_NONE, /* disable mouse */
576 SETTING_RIGHT_TRACKPAD_MODE, TRACKPAD_NONE, /* disable mouse */
577 SETTING_LEFT_TRACKPAD_CLICK_PRESSURE, 0xFFFF, /* disable haptic click */
578 SETTING_RIGHT_TRACKPAD_CLICK_PRESSURE, 0xFFFF, /* disable haptic click */
579 SETTING_STEAM_WATCHDOG_ENABLE, 0, /* disable watchdog that tests if Steam is active */
580 0);
581 mutex_unlock(&steam->report_mutex);
582 } else {
583 steam_write_settings(steam,
584 SETTING_LEFT_TRACKPAD_MODE, TRACKPAD_NONE, /* disable mouse */
585 SETTING_RIGHT_TRACKPAD_MODE, TRACKPAD_NONE, /* disable mouse */
586 0);
587 mutex_unlock(&steam->report_mutex);
588 }
589 }
590 }
591
steam_input_open(struct input_dev * dev)592 static int steam_input_open(struct input_dev *dev)
593 {
594 struct steam_device *steam = input_get_drvdata(dev);
595 unsigned long flags;
596 bool set_lizard_mode;
597
598 /*
599 * Disabling lizard mode automatically is only done on the Steam
600 * Controller. On the Steam Deck, this is toggled manually by holding
601 * the options button instead, handled by steam_mode_switch_cb.
602 */
603 if (!(steam->quirks & STEAM_QUIRK_DECK)) {
604 spin_lock_irqsave(&steam->lock, flags);
605 set_lizard_mode = !steam->client_opened && lizard_mode;
606 spin_unlock_irqrestore(&steam->lock, flags);
607 if (set_lizard_mode)
608 steam_set_lizard_mode(steam, false);
609 }
610
611 return 0;
612 }
613
steam_input_close(struct input_dev * dev)614 static void steam_input_close(struct input_dev *dev)
615 {
616 struct steam_device *steam = input_get_drvdata(dev);
617 unsigned long flags;
618 bool set_lizard_mode;
619
620 if (!(steam->quirks & STEAM_QUIRK_DECK)) {
621 spin_lock_irqsave(&steam->lock, flags);
622 set_lizard_mode = !steam->client_opened && lizard_mode;
623 spin_unlock_irqrestore(&steam->lock, flags);
624 if (set_lizard_mode)
625 steam_set_lizard_mode(steam, true);
626 }
627 }
628
629 static enum power_supply_property steam_battery_props[] = {
630 POWER_SUPPLY_PROP_PRESENT,
631 POWER_SUPPLY_PROP_SCOPE,
632 POWER_SUPPLY_PROP_VOLTAGE_NOW,
633 POWER_SUPPLY_PROP_CAPACITY,
634 };
635
steam_battery_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)636 static int steam_battery_get_property(struct power_supply *psy,
637 enum power_supply_property psp,
638 union power_supply_propval *val)
639 {
640 struct steam_device *steam = power_supply_get_drvdata(psy);
641 unsigned long flags;
642 s16 volts;
643 u8 batt;
644 int ret = 0;
645
646 spin_lock_irqsave(&steam->lock, flags);
647 volts = steam->voltage;
648 batt = steam->battery_charge;
649 spin_unlock_irqrestore(&steam->lock, flags);
650
651 switch (psp) {
652 case POWER_SUPPLY_PROP_PRESENT:
653 val->intval = 1;
654 break;
655 case POWER_SUPPLY_PROP_SCOPE:
656 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
657 break;
658 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
659 val->intval = volts * 1000; /* mV -> uV */
660 break;
661 case POWER_SUPPLY_PROP_CAPACITY:
662 val->intval = batt;
663 break;
664 default:
665 ret = -EINVAL;
666 break;
667 }
668 return ret;
669 }
670
steam_battery_register(struct steam_device * steam)671 static int steam_battery_register(struct steam_device *steam)
672 {
673 struct power_supply *battery;
674 struct power_supply_config battery_cfg = { .drv_data = steam, };
675 unsigned long flags;
676 int ret;
677
678 steam->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
679 steam->battery_desc.properties = steam_battery_props;
680 steam->battery_desc.num_properties = ARRAY_SIZE(steam_battery_props);
681 steam->battery_desc.get_property = steam_battery_get_property;
682 steam->battery_desc.name = devm_kasprintf(&steam->hdev->dev,
683 GFP_KERNEL, "steam-controller-%s-battery",
684 steam->serial_no);
685 if (!steam->battery_desc.name)
686 return -ENOMEM;
687
688 /* avoid the warning of 0% battery while waiting for the first info */
689 spin_lock_irqsave(&steam->lock, flags);
690 steam->voltage = 3000;
691 steam->battery_charge = 100;
692 spin_unlock_irqrestore(&steam->lock, flags);
693
694 battery = power_supply_register(&steam->hdev->dev,
695 &steam->battery_desc, &battery_cfg);
696 if (IS_ERR(battery)) {
697 ret = PTR_ERR(battery);
698 hid_err(steam->hdev,
699 "%s:power_supply_register failed with error %d\n",
700 __func__, ret);
701 return ret;
702 }
703 rcu_assign_pointer(steam->battery, battery);
704 power_supply_powers(battery, &steam->hdev->dev);
705 return 0;
706 }
707
steam_input_register(struct steam_device * steam)708 static int steam_input_register(struct steam_device *steam)
709 {
710 struct hid_device *hdev = steam->hdev;
711 struct input_dev *input;
712 int ret;
713
714 rcu_read_lock();
715 input = rcu_dereference(steam->input);
716 rcu_read_unlock();
717 if (input) {
718 dbg_hid("%s: already connected\n", __func__);
719 return 0;
720 }
721
722 input = input_allocate_device();
723 if (!input)
724 return -ENOMEM;
725
726 input_set_drvdata(input, steam);
727 input->dev.parent = &hdev->dev;
728 input->open = steam_input_open;
729 input->close = steam_input_close;
730
731 input->name = (steam->quirks & STEAM_QUIRK_WIRELESS) ? "Wireless Steam Controller" :
732 (steam->quirks & STEAM_QUIRK_DECK) ? "Steam Deck" :
733 "Steam Controller";
734 input->phys = hdev->phys;
735 input->uniq = steam->serial_no;
736 input->id.bustype = hdev->bus;
737 input->id.vendor = hdev->vendor;
738 input->id.product = hdev->product;
739 input->id.version = hdev->version;
740
741 input_set_capability(input, EV_KEY, BTN_TR2);
742 input_set_capability(input, EV_KEY, BTN_TL2);
743 input_set_capability(input, EV_KEY, BTN_TR);
744 input_set_capability(input, EV_KEY, BTN_TL);
745 input_set_capability(input, EV_KEY, BTN_Y);
746 input_set_capability(input, EV_KEY, BTN_B);
747 input_set_capability(input, EV_KEY, BTN_X);
748 input_set_capability(input, EV_KEY, BTN_A);
749 input_set_capability(input, EV_KEY, BTN_DPAD_UP);
750 input_set_capability(input, EV_KEY, BTN_DPAD_RIGHT);
751 input_set_capability(input, EV_KEY, BTN_DPAD_LEFT);
752 input_set_capability(input, EV_KEY, BTN_DPAD_DOWN);
753 input_set_capability(input, EV_KEY, BTN_SELECT);
754 input_set_capability(input, EV_KEY, BTN_MODE);
755 input_set_capability(input, EV_KEY, BTN_START);
756 input_set_capability(input, EV_KEY, BTN_THUMBR);
757 input_set_capability(input, EV_KEY, BTN_THUMBL);
758 input_set_capability(input, EV_KEY, BTN_THUMB);
759 input_set_capability(input, EV_KEY, BTN_THUMB2);
760 if (steam->quirks & STEAM_QUIRK_DECK) {
761 input_set_capability(input, EV_KEY, BTN_BASE);
762 input_set_capability(input, EV_KEY, BTN_TRIGGER_HAPPY1);
763 input_set_capability(input, EV_KEY, BTN_TRIGGER_HAPPY2);
764 input_set_capability(input, EV_KEY, BTN_TRIGGER_HAPPY3);
765 input_set_capability(input, EV_KEY, BTN_TRIGGER_HAPPY4);
766 } else {
767 input_set_capability(input, EV_KEY, BTN_GEAR_DOWN);
768 input_set_capability(input, EV_KEY, BTN_GEAR_UP);
769 }
770
771 input_set_abs_params(input, ABS_X, -32767, 32767, 0, 0);
772 input_set_abs_params(input, ABS_Y, -32767, 32767, 0, 0);
773
774 input_set_abs_params(input, ABS_HAT0X, -32767, 32767,
775 STEAM_PAD_FUZZ, 0);
776 input_set_abs_params(input, ABS_HAT0Y, -32767, 32767,
777 STEAM_PAD_FUZZ, 0);
778
779 if (steam->quirks & STEAM_QUIRK_DECK) {
780 input_set_abs_params(input, ABS_HAT2Y, 0, 32767, 0, 0);
781 input_set_abs_params(input, ABS_HAT2X, 0, 32767, 0, 0);
782
783 input_set_abs_params(input, ABS_RX, -32767, 32767, 0, 0);
784 input_set_abs_params(input, ABS_RY, -32767, 32767, 0, 0);
785
786 input_set_abs_params(input, ABS_HAT1X, -32767, 32767,
787 STEAM_PAD_FUZZ, 0);
788 input_set_abs_params(input, ABS_HAT1Y, -32767, 32767,
789 STEAM_PAD_FUZZ, 0);
790
791 input_abs_set_res(input, ABS_X, STEAM_DECK_JOYSTICK_RESOLUTION);
792 input_abs_set_res(input, ABS_Y, STEAM_DECK_JOYSTICK_RESOLUTION);
793 input_abs_set_res(input, ABS_RX, STEAM_DECK_JOYSTICK_RESOLUTION);
794 input_abs_set_res(input, ABS_RY, STEAM_DECK_JOYSTICK_RESOLUTION);
795 input_abs_set_res(input, ABS_HAT1X, STEAM_PAD_RESOLUTION);
796 input_abs_set_res(input, ABS_HAT1Y, STEAM_PAD_RESOLUTION);
797 input_abs_set_res(input, ABS_HAT2Y, STEAM_DECK_TRIGGER_RESOLUTION);
798 input_abs_set_res(input, ABS_HAT2X, STEAM_DECK_TRIGGER_RESOLUTION);
799 } else {
800 input_set_abs_params(input, ABS_HAT2Y, 0, 255, 0, 0);
801 input_set_abs_params(input, ABS_HAT2X, 0, 255, 0, 0);
802
803 input_set_abs_params(input, ABS_RX, -32767, 32767,
804 STEAM_PAD_FUZZ, 0);
805 input_set_abs_params(input, ABS_RY, -32767, 32767,
806 STEAM_PAD_FUZZ, 0);
807
808 input_abs_set_res(input, ABS_X, STEAM_JOYSTICK_RESOLUTION);
809 input_abs_set_res(input, ABS_Y, STEAM_JOYSTICK_RESOLUTION);
810 input_abs_set_res(input, ABS_RX, STEAM_PAD_RESOLUTION);
811 input_abs_set_res(input, ABS_RY, STEAM_PAD_RESOLUTION);
812 input_abs_set_res(input, ABS_HAT2Y, STEAM_TRIGGER_RESOLUTION);
813 input_abs_set_res(input, ABS_HAT2X, STEAM_TRIGGER_RESOLUTION);
814 }
815 input_abs_set_res(input, ABS_HAT0X, STEAM_PAD_RESOLUTION);
816 input_abs_set_res(input, ABS_HAT0Y, STEAM_PAD_RESOLUTION);
817
818 #ifdef CONFIG_STEAM_FF
819 if (steam->quirks & STEAM_QUIRK_DECK) {
820 input_set_capability(input, EV_FF, FF_RUMBLE);
821 ret = input_ff_create_memless(input, NULL, steam_play_effect);
822 if (ret)
823 goto input_register_fail;
824 }
825 #endif
826
827 ret = input_register_device(input);
828 if (ret)
829 goto input_register_fail;
830
831 rcu_assign_pointer(steam->input, input);
832 return 0;
833
834 input_register_fail:
835 input_free_device(input);
836 return ret;
837 }
838
steam_sensors_register(struct steam_device * steam)839 static int steam_sensors_register(struct steam_device *steam)
840 {
841 struct hid_device *hdev = steam->hdev;
842 struct input_dev *sensors;
843 int ret;
844
845 if (!(steam->quirks & STEAM_QUIRK_DECK))
846 return 0;
847
848 rcu_read_lock();
849 sensors = rcu_dereference(steam->sensors);
850 rcu_read_unlock();
851 if (sensors) {
852 dbg_hid("%s: already connected\n", __func__);
853 return 0;
854 }
855
856 sensors = input_allocate_device();
857 if (!sensors)
858 return -ENOMEM;
859
860 input_set_drvdata(sensors, steam);
861 sensors->dev.parent = &hdev->dev;
862
863 sensors->name = "Steam Deck Motion Sensors";
864 sensors->phys = hdev->phys;
865 sensors->uniq = steam->serial_no;
866 sensors->id.bustype = hdev->bus;
867 sensors->id.vendor = hdev->vendor;
868 sensors->id.product = hdev->product;
869 sensors->id.version = hdev->version;
870
871 __set_bit(INPUT_PROP_ACCELEROMETER, sensors->propbit);
872 __set_bit(EV_MSC, sensors->evbit);
873 __set_bit(MSC_TIMESTAMP, sensors->mscbit);
874
875 input_set_abs_params(sensors, ABS_X, -STEAM_DECK_ACCEL_RANGE,
876 STEAM_DECK_ACCEL_RANGE, STEAM_DECK_ACCEL_FUZZ, 0);
877 input_set_abs_params(sensors, ABS_Y, -STEAM_DECK_ACCEL_RANGE,
878 STEAM_DECK_ACCEL_RANGE, STEAM_DECK_ACCEL_FUZZ, 0);
879 input_set_abs_params(sensors, ABS_Z, -STEAM_DECK_ACCEL_RANGE,
880 STEAM_DECK_ACCEL_RANGE, STEAM_DECK_ACCEL_FUZZ, 0);
881 input_abs_set_res(sensors, ABS_X, STEAM_DECK_ACCEL_RES_PER_G);
882 input_abs_set_res(sensors, ABS_Y, STEAM_DECK_ACCEL_RES_PER_G);
883 input_abs_set_res(sensors, ABS_Z, STEAM_DECK_ACCEL_RES_PER_G);
884
885 input_set_abs_params(sensors, ABS_RX, -STEAM_DECK_GYRO_RANGE,
886 STEAM_DECK_GYRO_RANGE, STEAM_DECK_GYRO_FUZZ, 0);
887 input_set_abs_params(sensors, ABS_RY, -STEAM_DECK_GYRO_RANGE,
888 STEAM_DECK_GYRO_RANGE, STEAM_DECK_GYRO_FUZZ, 0);
889 input_set_abs_params(sensors, ABS_RZ, -STEAM_DECK_GYRO_RANGE,
890 STEAM_DECK_GYRO_RANGE, STEAM_DECK_GYRO_FUZZ, 0);
891 input_abs_set_res(sensors, ABS_RX, STEAM_DECK_GYRO_RES_PER_DPS);
892 input_abs_set_res(sensors, ABS_RY, STEAM_DECK_GYRO_RES_PER_DPS);
893 input_abs_set_res(sensors, ABS_RZ, STEAM_DECK_GYRO_RES_PER_DPS);
894
895 ret = input_register_device(sensors);
896 if (ret)
897 goto sensors_register_fail;
898
899 rcu_assign_pointer(steam->sensors, sensors);
900 return 0;
901
902 sensors_register_fail:
903 input_free_device(sensors);
904 return ret;
905 }
906
steam_input_unregister(struct steam_device * steam)907 static void steam_input_unregister(struct steam_device *steam)
908 {
909 struct input_dev *input;
910 rcu_read_lock();
911 input = rcu_dereference(steam->input);
912 rcu_read_unlock();
913 if (!input)
914 return;
915 RCU_INIT_POINTER(steam->input, NULL);
916 synchronize_rcu();
917 input_unregister_device(input);
918 }
919
steam_sensors_unregister(struct steam_device * steam)920 static void steam_sensors_unregister(struct steam_device *steam)
921 {
922 struct input_dev *sensors;
923
924 if (!(steam->quirks & STEAM_QUIRK_DECK))
925 return;
926
927 rcu_read_lock();
928 sensors = rcu_dereference(steam->sensors);
929 rcu_read_unlock();
930
931 if (!sensors)
932 return;
933 RCU_INIT_POINTER(steam->sensors, NULL);
934 synchronize_rcu();
935 input_unregister_device(sensors);
936 }
937
steam_battery_unregister(struct steam_device * steam)938 static void steam_battery_unregister(struct steam_device *steam)
939 {
940 struct power_supply *battery;
941
942 rcu_read_lock();
943 battery = rcu_dereference(steam->battery);
944 rcu_read_unlock();
945
946 if (!battery)
947 return;
948 RCU_INIT_POINTER(steam->battery, NULL);
949 synchronize_rcu();
950 power_supply_unregister(battery);
951 }
952
steam_register(struct steam_device * steam)953 static int steam_register(struct steam_device *steam)
954 {
955 int ret;
956 unsigned long client_opened;
957 unsigned long flags;
958
959 /*
960 * This function can be called several times in a row with the
961 * wireless adaptor, without steam_unregister() between them, because
962 * another client send a get_connection_status command, for example.
963 * The battery and serial number are set just once per device.
964 */
965 if (!steam->serial_no[0]) {
966 /*
967 * Unlikely, but getting the serial could fail, and it is not so
968 * important, so make up a serial number and go on.
969 */
970 if (steam_get_serial(steam) < 0)
971 strscpy(steam->serial_no, "XXXXXXXXXX",
972 sizeof(steam->serial_no));
973
974 hid_info(steam->hdev, "Steam Controller '%s' connected",
975 steam->serial_no);
976
977 /* ignore battery errors, we can live without it */
978 if (steam->quirks & STEAM_QUIRK_WIRELESS)
979 steam_battery_register(steam);
980
981 mutex_lock(&steam_devices_lock);
982 if (list_empty(&steam->list))
983 list_add(&steam->list, &steam_devices);
984 mutex_unlock(&steam_devices_lock);
985 }
986
987 spin_lock_irqsave(&steam->lock, flags);
988 client_opened = steam->client_opened;
989 spin_unlock_irqrestore(&steam->lock, flags);
990
991 if (!client_opened) {
992 steam_set_lizard_mode(steam, lizard_mode);
993 ret = steam_input_register(steam);
994 if (ret != 0)
995 goto steam_register_input_fail;
996 ret = steam_sensors_register(steam);
997 if (ret != 0)
998 goto steam_register_sensors_fail;
999 }
1000 return 0;
1001
1002 steam_register_sensors_fail:
1003 steam_input_unregister(steam);
1004 steam_register_input_fail:
1005 return ret;
1006 }
1007
steam_unregister(struct steam_device * steam)1008 static void steam_unregister(struct steam_device *steam)
1009 {
1010 steam_battery_unregister(steam);
1011 steam_sensors_unregister(steam);
1012 steam_input_unregister(steam);
1013 if (steam->serial_no[0]) {
1014 hid_info(steam->hdev, "Steam Controller '%s' disconnected",
1015 steam->serial_no);
1016 mutex_lock(&steam_devices_lock);
1017 list_del_init(&steam->list);
1018 mutex_unlock(&steam_devices_lock);
1019 steam->serial_no[0] = 0;
1020 }
1021 }
1022
steam_work_connect_cb(struct work_struct * work)1023 static void steam_work_connect_cb(struct work_struct *work)
1024 {
1025 struct steam_device *steam = container_of(work, struct steam_device,
1026 work_connect);
1027 unsigned long flags;
1028 bool connected;
1029 int ret;
1030
1031 spin_lock_irqsave(&steam->lock, flags);
1032 connected = steam->connected;
1033 spin_unlock_irqrestore(&steam->lock, flags);
1034
1035 if (connected) {
1036 ret = steam_register(steam);
1037 if (ret) {
1038 hid_err(steam->hdev,
1039 "%s:steam_register failed with error %d\n",
1040 __func__, ret);
1041 }
1042 } else {
1043 steam_unregister(steam);
1044 }
1045 }
1046
steam_mode_switch_cb(struct work_struct * work)1047 static void steam_mode_switch_cb(struct work_struct *work)
1048 {
1049 struct steam_device *steam = container_of(to_delayed_work(work),
1050 struct steam_device, mode_switch);
1051 unsigned long flags;
1052 bool client_opened;
1053 steam->gamepad_mode = !steam->gamepad_mode;
1054 if (!lizard_mode)
1055 return;
1056
1057 if (steam->gamepad_mode)
1058 steam_set_lizard_mode(steam, false);
1059 else {
1060 spin_lock_irqsave(&steam->lock, flags);
1061 client_opened = steam->client_opened;
1062 spin_unlock_irqrestore(&steam->lock, flags);
1063 if (!client_opened)
1064 steam_set_lizard_mode(steam, lizard_mode);
1065 }
1066
1067 steam_haptic_pulse(steam, STEAM_PAD_RIGHT, 0x190, 0, 1, 0);
1068 if (steam->gamepad_mode) {
1069 steam_haptic_pulse(steam, STEAM_PAD_LEFT, 0x14D, 0x14D, 0x2D, 0);
1070 } else {
1071 steam_haptic_pulse(steam, STEAM_PAD_LEFT, 0x1F4, 0x1F4, 0x1E, 0);
1072 }
1073 }
1074
steam_is_valve_interface(struct hid_device * hdev)1075 static bool steam_is_valve_interface(struct hid_device *hdev)
1076 {
1077 struct hid_report_enum *rep_enum;
1078
1079 /*
1080 * The wired device creates 3 interfaces:
1081 * 0: emulated mouse.
1082 * 1: emulated keyboard.
1083 * 2: the real game pad.
1084 * The wireless device creates 5 interfaces:
1085 * 0: emulated keyboard.
1086 * 1-4: slots where up to 4 real game pads will be connected to.
1087 * We know which one is the real gamepad interface because they are the
1088 * only ones with a feature report.
1089 */
1090 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1091 return !list_empty(&rep_enum->report_list);
1092 }
1093
steam_client_ll_parse(struct hid_device * hdev)1094 static int steam_client_ll_parse(struct hid_device *hdev)
1095 {
1096 struct steam_device *steam = hdev->driver_data;
1097
1098 return hid_parse_report(hdev, steam->hdev->dev_rdesc,
1099 steam->hdev->dev_rsize);
1100 }
1101
steam_client_ll_start(struct hid_device * hdev)1102 static int steam_client_ll_start(struct hid_device *hdev)
1103 {
1104 return 0;
1105 }
1106
steam_client_ll_stop(struct hid_device * hdev)1107 static void steam_client_ll_stop(struct hid_device *hdev)
1108 {
1109 }
1110
steam_client_ll_open(struct hid_device * hdev)1111 static int steam_client_ll_open(struct hid_device *hdev)
1112 {
1113 struct steam_device *steam = hdev->driver_data;
1114 unsigned long flags;
1115
1116 spin_lock_irqsave(&steam->lock, flags);
1117 steam->client_opened++;
1118 spin_unlock_irqrestore(&steam->lock, flags);
1119
1120 steam_sensors_unregister(steam);
1121 steam_input_unregister(steam);
1122
1123 return 0;
1124 }
1125
steam_client_ll_close(struct hid_device * hdev)1126 static void steam_client_ll_close(struct hid_device *hdev)
1127 {
1128 struct steam_device *steam = hdev->driver_data;
1129
1130 unsigned long flags;
1131 bool connected;
1132
1133 spin_lock_irqsave(&steam->lock, flags);
1134 steam->client_opened--;
1135 connected = steam->connected && !steam->client_opened;
1136 spin_unlock_irqrestore(&steam->lock, flags);
1137
1138 if (connected) {
1139 steam_set_lizard_mode(steam, lizard_mode);
1140 steam_input_register(steam);
1141 steam_sensors_register(steam);
1142 }
1143 }
1144
steam_client_ll_raw_request(struct hid_device * hdev,unsigned char reportnum,u8 * buf,size_t count,unsigned char report_type,int reqtype)1145 static int steam_client_ll_raw_request(struct hid_device *hdev,
1146 unsigned char reportnum, u8 *buf,
1147 size_t count, unsigned char report_type,
1148 int reqtype)
1149 {
1150 struct steam_device *steam = hdev->driver_data;
1151
1152 return hid_hw_raw_request(steam->hdev, reportnum, buf, count,
1153 report_type, reqtype);
1154 }
1155
1156 static const struct hid_ll_driver steam_client_ll_driver = {
1157 .parse = steam_client_ll_parse,
1158 .start = steam_client_ll_start,
1159 .stop = steam_client_ll_stop,
1160 .open = steam_client_ll_open,
1161 .close = steam_client_ll_close,
1162 .raw_request = steam_client_ll_raw_request,
1163 };
1164
steam_create_client_hid(struct hid_device * hdev)1165 static struct hid_device *steam_create_client_hid(struct hid_device *hdev)
1166 {
1167 struct hid_device *client_hdev;
1168
1169 client_hdev = hid_allocate_device();
1170 if (IS_ERR(client_hdev))
1171 return client_hdev;
1172
1173 client_hdev->ll_driver = &steam_client_ll_driver;
1174 client_hdev->dev.parent = hdev->dev.parent;
1175 client_hdev->bus = hdev->bus;
1176 client_hdev->vendor = hdev->vendor;
1177 client_hdev->product = hdev->product;
1178 client_hdev->version = hdev->version;
1179 client_hdev->type = hdev->type;
1180 client_hdev->country = hdev->country;
1181 strscpy(client_hdev->name, hdev->name,
1182 sizeof(client_hdev->name));
1183 strscpy(client_hdev->phys, hdev->phys,
1184 sizeof(client_hdev->phys));
1185 /*
1186 * Since we use the same device info than the real interface to
1187 * trick userspace, we will be calling steam_probe recursively.
1188 * We need to recognize the client interface somehow.
1189 */
1190 client_hdev->group = HID_GROUP_STEAM;
1191 return client_hdev;
1192 }
1193
steam_probe(struct hid_device * hdev,const struct hid_device_id * id)1194 static int steam_probe(struct hid_device *hdev,
1195 const struct hid_device_id *id)
1196 {
1197 struct steam_device *steam;
1198 int ret;
1199
1200 ret = hid_parse(hdev);
1201 if (ret) {
1202 hid_err(hdev,
1203 "%s:parse of hid interface failed\n", __func__);
1204 return ret;
1205 }
1206
1207 /*
1208 * The virtual client_dev is only used for hidraw.
1209 * Also avoid the recursive probe.
1210 */
1211 if (hdev->group == HID_GROUP_STEAM)
1212 return hid_hw_start(hdev, HID_CONNECT_HIDRAW);
1213 /*
1214 * The non-valve interfaces (mouse and keyboard emulation) are
1215 * connected without changes.
1216 */
1217 if (!steam_is_valve_interface(hdev))
1218 return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1219
1220 steam = devm_kzalloc(&hdev->dev, sizeof(*steam), GFP_KERNEL);
1221 if (!steam)
1222 return -ENOMEM;
1223
1224 steam->hdev = hdev;
1225 hid_set_drvdata(hdev, steam);
1226 spin_lock_init(&steam->lock);
1227 mutex_init(&steam->report_mutex);
1228 steam->quirks = id->driver_data;
1229 INIT_WORK(&steam->work_connect, steam_work_connect_cb);
1230 INIT_DELAYED_WORK(&steam->mode_switch, steam_mode_switch_cb);
1231 INIT_LIST_HEAD(&steam->list);
1232 INIT_WORK(&steam->rumble_work, steam_haptic_rumble_cb);
1233 steam->sensor_timestamp_us = 0;
1234
1235 /*
1236 * With the real steam controller interface, do not connect hidraw.
1237 * Instead, create the client_hid and connect that.
1238 */
1239 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_HIDRAW);
1240 if (ret)
1241 goto err_cancel_work;
1242
1243 ret = hid_hw_open(hdev);
1244 if (ret) {
1245 hid_err(hdev,
1246 "%s:hid_hw_open\n",
1247 __func__);
1248 goto err_hw_stop;
1249 }
1250
1251 if (steam->quirks & STEAM_QUIRK_WIRELESS) {
1252 hid_info(hdev, "Steam wireless receiver connected");
1253 /* If using a wireless adaptor ask for connection status */
1254 steam->connected = false;
1255 steam_request_conn_status(steam);
1256 } else {
1257 /* A wired connection is always present */
1258 steam->connected = true;
1259 ret = steam_register(steam);
1260 if (ret) {
1261 hid_err(hdev,
1262 "%s:steam_register failed with error %d\n",
1263 __func__, ret);
1264 goto err_hw_close;
1265 }
1266 }
1267
1268 steam->client_hdev = steam_create_client_hid(hdev);
1269 if (IS_ERR(steam->client_hdev)) {
1270 ret = PTR_ERR(steam->client_hdev);
1271 goto err_steam_unregister;
1272 }
1273 steam->client_hdev->driver_data = steam;
1274
1275 ret = hid_add_device(steam->client_hdev);
1276 if (ret)
1277 goto err_destroy;
1278
1279 return 0;
1280
1281 err_destroy:
1282 hid_destroy_device(steam->client_hdev);
1283 err_steam_unregister:
1284 if (steam->connected)
1285 steam_unregister(steam);
1286 err_hw_close:
1287 hid_hw_close(hdev);
1288 err_hw_stop:
1289 hid_hw_stop(hdev);
1290 err_cancel_work:
1291 cancel_work_sync(&steam->work_connect);
1292 cancel_delayed_work_sync(&steam->mode_switch);
1293 cancel_work_sync(&steam->rumble_work);
1294
1295 return ret;
1296 }
1297
steam_remove(struct hid_device * hdev)1298 static void steam_remove(struct hid_device *hdev)
1299 {
1300 struct steam_device *steam = hid_get_drvdata(hdev);
1301
1302 if (!steam || hdev->group == HID_GROUP_STEAM) {
1303 hid_hw_stop(hdev);
1304 return;
1305 }
1306
1307 cancel_delayed_work_sync(&steam->mode_switch);
1308 cancel_work_sync(&steam->work_connect);
1309 hid_destroy_device(steam->client_hdev);
1310 steam->client_hdev = NULL;
1311 steam->client_opened = 0;
1312 if (steam->quirks & STEAM_QUIRK_WIRELESS) {
1313 hid_info(hdev, "Steam wireless receiver disconnected");
1314 }
1315 hid_hw_close(hdev);
1316 hid_hw_stop(hdev);
1317 steam_unregister(steam);
1318 }
1319
steam_do_connect_event(struct steam_device * steam,bool connected)1320 static void steam_do_connect_event(struct steam_device *steam, bool connected)
1321 {
1322 unsigned long flags;
1323 bool changed;
1324
1325 spin_lock_irqsave(&steam->lock, flags);
1326 changed = steam->connected != connected;
1327 steam->connected = connected;
1328 spin_unlock_irqrestore(&steam->lock, flags);
1329
1330 if (changed && schedule_work(&steam->work_connect) == 0)
1331 dbg_hid("%s: connected=%d event already queued\n",
1332 __func__, connected);
1333 }
1334
1335 /*
1336 * Some input data in the protocol has the opposite sign.
1337 * Clamp the values to 32767..-32767 so that the range is
1338 * symmetrical and can be negated safely.
1339 */
steam_le16(u8 * data)1340 static inline s16 steam_le16(u8 *data)
1341 {
1342 s16 x = (s16) le16_to_cpup((__le16 *)data);
1343
1344 return x == -32768 ? -32767 : x;
1345 }
1346
1347 /*
1348 * The size for this message payload is 60.
1349 * The known values are:
1350 * (* values are not sent through wireless)
1351 * (* accelerator/gyro is disabled by default)
1352 * Offset| Type | Mapped to |Meaning
1353 * -------+-------+-----------+--------------------------
1354 * 4-7 | u32 | -- | sequence number
1355 * 8-10 | 24bit | see below | buttons
1356 * 11 | u8 | ABS_HAT2Y | left trigger
1357 * 12 | u8 | ABS_HAT2X | right trigger
1358 * 13-15 | -- | -- | always 0
1359 * 16-17 | s16 | ABS_X/ABS_HAT0X | X value
1360 * 18-19 | s16 | ABS_Y/ABS_HAT0Y | Y value
1361 * 20-21 | s16 | ABS_RX | right-pad X value
1362 * 22-23 | s16 | ABS_RY | right-pad Y value
1363 * 24-25 | s16 | -- | * left trigger
1364 * 26-27 | s16 | -- | * right trigger
1365 * 28-29 | s16 | -- | * accelerometer X value
1366 * 30-31 | s16 | -- | * accelerometer Y value
1367 * 32-33 | s16 | -- | * accelerometer Z value
1368 * 34-35 | s16 | -- | gyro X value
1369 * 36-36 | s16 | -- | gyro Y value
1370 * 38-39 | s16 | -- | gyro Z value
1371 * 40-41 | s16 | -- | quaternion W value
1372 * 42-43 | s16 | -- | quaternion X value
1373 * 44-45 | s16 | -- | quaternion Y value
1374 * 46-47 | s16 | -- | quaternion Z value
1375 * 48-49 | -- | -- | always 0
1376 * 50-51 | s16 | -- | * left trigger (uncalibrated)
1377 * 52-53 | s16 | -- | * right trigger (uncalibrated)
1378 * 54-55 | s16 | -- | * joystick X value (uncalibrated)
1379 * 56-57 | s16 | -- | * joystick Y value (uncalibrated)
1380 * 58-59 | s16 | -- | * left-pad X value
1381 * 60-61 | s16 | -- | * left-pad Y value
1382 * 62-63 | u16 | -- | * battery voltage
1383 *
1384 * The buttons are:
1385 * Bit | Mapped to | Description
1386 * ------+------------+--------------------------------
1387 * 8.0 | BTN_TR2 | right trigger fully pressed
1388 * 8.1 | BTN_TL2 | left trigger fully pressed
1389 * 8.2 | BTN_TR | right shoulder
1390 * 8.3 | BTN_TL | left shoulder
1391 * 8.4 | BTN_Y | button Y
1392 * 8.5 | BTN_B | button B
1393 * 8.6 | BTN_X | button X
1394 * 8.7 | BTN_A | button A
1395 * 9.0 | BTN_DPAD_UP | left-pad up
1396 * 9.1 | BTN_DPAD_RIGHT | left-pad right
1397 * 9.2 | BTN_DPAD_LEFT | left-pad left
1398 * 9.3 | BTN_DPAD_DOWN | left-pad down
1399 * 9.4 | BTN_SELECT | menu left
1400 * 9.5 | BTN_MODE | steam logo
1401 * 9.6 | BTN_START | menu right
1402 * 9.7 | BTN_GEAR_DOWN | left back lever
1403 * 10.0 | BTN_GEAR_UP | right back lever
1404 * 10.1 | -- | left-pad clicked
1405 * 10.2 | BTN_THUMBR | right-pad clicked
1406 * 10.3 | BTN_THUMB | left-pad touched (but see explanation below)
1407 * 10.4 | BTN_THUMB2 | right-pad touched
1408 * 10.5 | -- | unknown
1409 * 10.6 | BTN_THUMBL | joystick clicked
1410 * 10.7 | -- | lpad_and_joy
1411 */
1412
steam_do_input_event(struct steam_device * steam,struct input_dev * input,u8 * data)1413 static void steam_do_input_event(struct steam_device *steam,
1414 struct input_dev *input, u8 *data)
1415 {
1416 /* 24 bits of buttons */
1417 u8 b8, b9, b10;
1418 s16 x, y;
1419 bool lpad_touched, lpad_and_joy;
1420
1421 b8 = data[8];
1422 b9 = data[9];
1423 b10 = data[10];
1424
1425 input_report_abs(input, ABS_HAT2Y, data[11]);
1426 input_report_abs(input, ABS_HAT2X, data[12]);
1427
1428 /*
1429 * These two bits tells how to interpret the values X and Y.
1430 * lpad_and_joy tells that the joystick and the lpad are used at the
1431 * same time.
1432 * lpad_touched tells whether X/Y are to be read as lpad coord or
1433 * joystick values.
1434 * (lpad_touched || lpad_and_joy) tells if the lpad is really touched.
1435 */
1436 lpad_touched = b10 & BIT(3);
1437 lpad_and_joy = b10 & BIT(7);
1438 x = steam_le16(data + 16);
1439 y = -steam_le16(data + 18);
1440
1441 input_report_abs(input, lpad_touched ? ABS_HAT0X : ABS_X, x);
1442 input_report_abs(input, lpad_touched ? ABS_HAT0Y : ABS_Y, y);
1443 /* Check if joystick is centered */
1444 if (lpad_touched && !lpad_and_joy) {
1445 input_report_abs(input, ABS_X, 0);
1446 input_report_abs(input, ABS_Y, 0);
1447 }
1448 /* Check if lpad is untouched */
1449 if (!(lpad_touched || lpad_and_joy)) {
1450 input_report_abs(input, ABS_HAT0X, 0);
1451 input_report_abs(input, ABS_HAT0Y, 0);
1452 }
1453
1454 input_report_abs(input, ABS_RX, steam_le16(data + 20));
1455 input_report_abs(input, ABS_RY, -steam_le16(data + 22));
1456
1457 input_event(input, EV_KEY, BTN_TR2, !!(b8 & BIT(0)));
1458 input_event(input, EV_KEY, BTN_TL2, !!(b8 & BIT(1)));
1459 input_event(input, EV_KEY, BTN_TR, !!(b8 & BIT(2)));
1460 input_event(input, EV_KEY, BTN_TL, !!(b8 & BIT(3)));
1461 input_event(input, EV_KEY, BTN_Y, !!(b8 & BIT(4)));
1462 input_event(input, EV_KEY, BTN_B, !!(b8 & BIT(5)));
1463 input_event(input, EV_KEY, BTN_X, !!(b8 & BIT(6)));
1464 input_event(input, EV_KEY, BTN_A, !!(b8 & BIT(7)));
1465 input_event(input, EV_KEY, BTN_SELECT, !!(b9 & BIT(4)));
1466 input_event(input, EV_KEY, BTN_MODE, !!(b9 & BIT(5)));
1467 input_event(input, EV_KEY, BTN_START, !!(b9 & BIT(6)));
1468 input_event(input, EV_KEY, BTN_GEAR_DOWN, !!(b9 & BIT(7)));
1469 input_event(input, EV_KEY, BTN_GEAR_UP, !!(b10 & BIT(0)));
1470 input_event(input, EV_KEY, BTN_THUMBR, !!(b10 & BIT(2)));
1471 input_event(input, EV_KEY, BTN_THUMBL, !!(b10 & BIT(6)));
1472 input_event(input, EV_KEY, BTN_THUMB, lpad_touched || lpad_and_joy);
1473 input_event(input, EV_KEY, BTN_THUMB2, !!(b10 & BIT(4)));
1474 input_event(input, EV_KEY, BTN_DPAD_UP, !!(b9 & BIT(0)));
1475 input_event(input, EV_KEY, BTN_DPAD_RIGHT, !!(b9 & BIT(1)));
1476 input_event(input, EV_KEY, BTN_DPAD_LEFT, !!(b9 & BIT(2)));
1477 input_event(input, EV_KEY, BTN_DPAD_DOWN, !!(b9 & BIT(3)));
1478
1479 input_sync(input);
1480 }
1481
1482 /*
1483 * The size for this message payload is 56.
1484 * The known values are:
1485 * Offset| Type | Mapped to |Meaning
1486 * -------+-------+-----------+--------------------------
1487 * 4-7 | u32 | -- | sequence number
1488 * 8-15 | u64 | see below | buttons
1489 * 16-17 | s16 | ABS_HAT0X | left-pad X value
1490 * 18-19 | s16 | ABS_HAT0Y | left-pad Y value
1491 * 20-21 | s16 | ABS_HAT1X | right-pad X value
1492 * 22-23 | s16 | ABS_HAT1Y | right-pad Y value
1493 * 24-25 | s16 | IMU ABS_X | accelerometer X value
1494 * 26-27 | s16 | IMU ABS_Z | accelerometer Y value
1495 * 28-29 | s16 | IMU ABS_Y | accelerometer Z value
1496 * 30-31 | s16 | IMU ABS_RX | gyro X value
1497 * 32-33 | s16 | IMU ABS_RZ | gyro Y value
1498 * 34-35 | s16 | IMU ABS_RY | gyro Z value
1499 * 36-37 | s16 | -- | quaternion W value
1500 * 38-39 | s16 | -- | quaternion X value
1501 * 40-41 | s16 | -- | quaternion Y value
1502 * 42-43 | s16 | -- | quaternion Z value
1503 * 44-45 | u16 | ABS_HAT2Y | left trigger (uncalibrated)
1504 * 46-47 | u16 | ABS_HAT2X | right trigger (uncalibrated)
1505 * 48-49 | s16 | ABS_X | left joystick X
1506 * 50-51 | s16 | ABS_Y | left joystick Y
1507 * 52-53 | s16 | ABS_RX | right joystick X
1508 * 54-55 | s16 | ABS_RY | right joystick Y
1509 * 56-57 | u16 | -- | left pad pressure
1510 * 58-59 | u16 | -- | right pad pressure
1511 *
1512 * The buttons are:
1513 * Bit | Mapped to | Description
1514 * ------+------------+--------------------------------
1515 * 8.0 | BTN_TR2 | right trigger fully pressed
1516 * 8.1 | BTN_TL2 | left trigger fully pressed
1517 * 8.2 | BTN_TR | right shoulder
1518 * 8.3 | BTN_TL | left shoulder
1519 * 8.4 | BTN_Y | button Y
1520 * 8.5 | BTN_B | button B
1521 * 8.6 | BTN_X | button X
1522 * 8.7 | BTN_A | button A
1523 * 9.0 | BTN_DPAD_UP | left-pad up
1524 * 9.1 | BTN_DPAD_RIGHT | left-pad right
1525 * 9.2 | BTN_DPAD_LEFT | left-pad left
1526 * 9.3 | BTN_DPAD_DOWN | left-pad down
1527 * 9.4 | BTN_SELECT | menu left
1528 * 9.5 | BTN_MODE | steam logo
1529 * 9.6 | BTN_START | menu right
1530 * 9.7 | BTN_TRIGGER_HAPPY3 | left bottom grip button
1531 * 10.0 | BTN_TRIGGER_HAPPY4 | right bottom grip button
1532 * 10.1 | BTN_THUMB | left pad pressed
1533 * 10.2 | BTN_THUMB2 | right pad pressed
1534 * 10.3 | -- | left pad touched
1535 * 10.4 | -- | right pad touched
1536 * 10.5 | -- | unknown
1537 * 10.6 | BTN_THUMBL | left joystick clicked
1538 * 10.7 | -- | unknown
1539 * 11.0 | -- | unknown
1540 * 11.1 | -- | unknown
1541 * 11.2 | BTN_THUMBR | right joystick clicked
1542 * 11.3 | -- | unknown
1543 * 11.4 | -- | unknown
1544 * 11.5 | -- | unknown
1545 * 11.6 | -- | unknown
1546 * 11.7 | -- | unknown
1547 * 12.0 | -- | unknown
1548 * 12.1 | -- | unknown
1549 * 12.2 | -- | unknown
1550 * 12.3 | -- | unknown
1551 * 12.4 | -- | unknown
1552 * 12.5 | -- | unknown
1553 * 12.6 | -- | unknown
1554 * 12.7 | -- | unknown
1555 * 13.0 | -- | unknown
1556 * 13.1 | BTN_TRIGGER_HAPPY1 | left top grip button
1557 * 13.2 | BTN_TRIGGER_HAPPY2 | right top grip button
1558 * 13.3 | -- | unknown
1559 * 13.4 | -- | unknown
1560 * 13.5 | -- | unknown
1561 * 13.6 | -- | left joystick touched
1562 * 13.7 | -- | right joystick touched
1563 * 14.0 | -- | unknown
1564 * 14.1 | -- | unknown
1565 * 14.2 | BTN_BASE | quick access button
1566 * 14.3 | -- | unknown
1567 * 14.4 | -- | unknown
1568 * 14.5 | -- | unknown
1569 * 14.6 | -- | unknown
1570 * 14.7 | -- | unknown
1571 * 15.0 | -- | unknown
1572 * 15.1 | -- | unknown
1573 * 15.2 | -- | unknown
1574 * 15.3 | -- | unknown
1575 * 15.4 | -- | unknown
1576 * 15.5 | -- | unknown
1577 * 15.6 | -- | unknown
1578 * 15.7 | -- | unknown
1579 */
steam_do_deck_input_event(struct steam_device * steam,struct input_dev * input,u8 * data)1580 static void steam_do_deck_input_event(struct steam_device *steam,
1581 struct input_dev *input, u8 *data)
1582 {
1583 u8 b8, b9, b10, b11, b13, b14;
1584 bool lpad_touched, rpad_touched;
1585
1586 b8 = data[8];
1587 b9 = data[9];
1588 b10 = data[10];
1589 b11 = data[11];
1590 b13 = data[13];
1591 b14 = data[14];
1592
1593 if (!(b9 & BIT(6)) && steam->did_mode_switch) {
1594 steam->did_mode_switch = false;
1595 cancel_delayed_work_sync(&steam->mode_switch);
1596 } else if (!steam->client_opened && (b9 & BIT(6)) && !steam->did_mode_switch) {
1597 steam->did_mode_switch = true;
1598 schedule_delayed_work(&steam->mode_switch, 45 * HZ / 100);
1599 }
1600
1601 if (!steam->gamepad_mode)
1602 return;
1603
1604 lpad_touched = b10 & BIT(3);
1605 rpad_touched = b10 & BIT(4);
1606
1607 if (lpad_touched) {
1608 input_report_abs(input, ABS_HAT0X, steam_le16(data + 16));
1609 input_report_abs(input, ABS_HAT0Y, steam_le16(data + 18));
1610 } else {
1611 input_report_abs(input, ABS_HAT0X, 0);
1612 input_report_abs(input, ABS_HAT0Y, 0);
1613 }
1614
1615 if (rpad_touched) {
1616 input_report_abs(input, ABS_HAT1X, steam_le16(data + 20));
1617 input_report_abs(input, ABS_HAT1Y, steam_le16(data + 22));
1618 } else {
1619 input_report_abs(input, ABS_HAT1X, 0);
1620 input_report_abs(input, ABS_HAT1Y, 0);
1621 }
1622
1623 input_report_abs(input, ABS_X, steam_le16(data + 48));
1624 input_report_abs(input, ABS_Y, -steam_le16(data + 50));
1625 input_report_abs(input, ABS_RX, steam_le16(data + 52));
1626 input_report_abs(input, ABS_RY, -steam_le16(data + 54));
1627
1628 input_report_abs(input, ABS_HAT2Y, steam_le16(data + 44));
1629 input_report_abs(input, ABS_HAT2X, steam_le16(data + 46));
1630
1631 input_event(input, EV_KEY, BTN_TR2, !!(b8 & BIT(0)));
1632 input_event(input, EV_KEY, BTN_TL2, !!(b8 & BIT(1)));
1633 input_event(input, EV_KEY, BTN_TR, !!(b8 & BIT(2)));
1634 input_event(input, EV_KEY, BTN_TL, !!(b8 & BIT(3)));
1635 input_event(input, EV_KEY, BTN_Y, !!(b8 & BIT(4)));
1636 input_event(input, EV_KEY, BTN_B, !!(b8 & BIT(5)));
1637 input_event(input, EV_KEY, BTN_X, !!(b8 & BIT(6)));
1638 input_event(input, EV_KEY, BTN_A, !!(b8 & BIT(7)));
1639 input_event(input, EV_KEY, BTN_SELECT, !!(b9 & BIT(4)));
1640 input_event(input, EV_KEY, BTN_MODE, !!(b9 & BIT(5)));
1641 input_event(input, EV_KEY, BTN_START, !!(b9 & BIT(6)));
1642 input_event(input, EV_KEY, BTN_TRIGGER_HAPPY3, !!(b9 & BIT(7)));
1643 input_event(input, EV_KEY, BTN_TRIGGER_HAPPY4, !!(b10 & BIT(0)));
1644 input_event(input, EV_KEY, BTN_THUMBL, !!(b10 & BIT(6)));
1645 input_event(input, EV_KEY, BTN_THUMBR, !!(b11 & BIT(2)));
1646 input_event(input, EV_KEY, BTN_DPAD_UP, !!(b9 & BIT(0)));
1647 input_event(input, EV_KEY, BTN_DPAD_RIGHT, !!(b9 & BIT(1)));
1648 input_event(input, EV_KEY, BTN_DPAD_LEFT, !!(b9 & BIT(2)));
1649 input_event(input, EV_KEY, BTN_DPAD_DOWN, !!(b9 & BIT(3)));
1650 input_event(input, EV_KEY, BTN_THUMB, !!(b10 & BIT(1)));
1651 input_event(input, EV_KEY, BTN_THUMB2, !!(b10 & BIT(2)));
1652 input_event(input, EV_KEY, BTN_TRIGGER_HAPPY1, !!(b13 & BIT(1)));
1653 input_event(input, EV_KEY, BTN_TRIGGER_HAPPY2, !!(b13 & BIT(2)));
1654 input_event(input, EV_KEY, BTN_BASE, !!(b14 & BIT(2)));
1655
1656 input_sync(input);
1657 }
1658
steam_do_deck_sensors_event(struct steam_device * steam,struct input_dev * sensors,u8 * data)1659 static void steam_do_deck_sensors_event(struct steam_device *steam,
1660 struct input_dev *sensors, u8 *data)
1661 {
1662 /*
1663 * The deck input report is received every 4 ms on average,
1664 * with a jitter of +/- 4 ms even though the USB descriptor claims
1665 * that it uses 1 kHz.
1666 * Since the HID report does not include a sensor timestamp,
1667 * use a fixed increment here.
1668 */
1669 steam->sensor_timestamp_us += 4000;
1670
1671 if (!steam->gamepad_mode)
1672 return;
1673
1674 input_event(sensors, EV_MSC, MSC_TIMESTAMP, steam->sensor_timestamp_us);
1675 input_report_abs(sensors, ABS_X, steam_le16(data + 24));
1676 input_report_abs(sensors, ABS_Z, -steam_le16(data + 26));
1677 input_report_abs(sensors, ABS_Y, steam_le16(data + 28));
1678 input_report_abs(sensors, ABS_RX, steam_le16(data + 30));
1679 input_report_abs(sensors, ABS_RZ, -steam_le16(data + 32));
1680 input_report_abs(sensors, ABS_RY, steam_le16(data + 34));
1681
1682 input_sync(sensors);
1683 }
1684
1685 /*
1686 * The size for this message payload is 11.
1687 * The known values are:
1688 * Offset| Type | Meaning
1689 * -------+-------+---------------------------
1690 * 4-7 | u32 | sequence number
1691 * 8-11 | -- | always 0
1692 * 12-13 | u16 | voltage (mV)
1693 * 14 | u8 | battery percent
1694 */
steam_do_battery_event(struct steam_device * steam,struct power_supply * battery,u8 * data)1695 static void steam_do_battery_event(struct steam_device *steam,
1696 struct power_supply *battery, u8 *data)
1697 {
1698 unsigned long flags;
1699
1700 s16 volts = steam_le16(data + 12);
1701 u8 batt = data[14];
1702
1703 /* Creating the battery may have failed */
1704 rcu_read_lock();
1705 battery = rcu_dereference(steam->battery);
1706 if (likely(battery)) {
1707 spin_lock_irqsave(&steam->lock, flags);
1708 steam->voltage = volts;
1709 steam->battery_charge = batt;
1710 spin_unlock_irqrestore(&steam->lock, flags);
1711 power_supply_changed(battery);
1712 }
1713 rcu_read_unlock();
1714 }
1715
steam_raw_event(struct hid_device * hdev,struct hid_report * report,u8 * data,int size)1716 static int steam_raw_event(struct hid_device *hdev,
1717 struct hid_report *report, u8 *data,
1718 int size)
1719 {
1720 struct steam_device *steam = hid_get_drvdata(hdev);
1721 struct input_dev *input;
1722 struct input_dev *sensors;
1723 struct power_supply *battery;
1724
1725 if (!steam)
1726 return 0;
1727
1728 if (steam->client_opened)
1729 hid_input_report(steam->client_hdev, HID_FEATURE_REPORT,
1730 data, size, 0);
1731 /*
1732 * All messages are size=64, all values little-endian.
1733 * The format is:
1734 * Offset| Meaning
1735 * -------+--------------------------------------------
1736 * 0-1 | always 0x01, 0x00, maybe protocol version?
1737 * 2 | type of message
1738 * 3 | length of the real payload (not checked)
1739 * 4-n | payload data, depends on the type
1740 *
1741 * There are these known types of message:
1742 * 0x01: input data (60 bytes)
1743 * 0x03: wireless connect/disconnect (1 byte)
1744 * 0x04: battery status (11 bytes)
1745 * 0x09: Steam Deck input data (56 bytes)
1746 */
1747
1748 if (size != 64 || data[0] != 1 || data[1] != 0)
1749 return 0;
1750
1751 switch (data[2]) {
1752 case ID_CONTROLLER_STATE:
1753 if (steam->client_opened)
1754 return 0;
1755 rcu_read_lock();
1756 input = rcu_dereference(steam->input);
1757 if (likely(input))
1758 steam_do_input_event(steam, input, data);
1759 rcu_read_unlock();
1760 break;
1761 case ID_CONTROLLER_DECK_STATE:
1762 if (steam->client_opened)
1763 return 0;
1764 rcu_read_lock();
1765 input = rcu_dereference(steam->input);
1766 if (likely(input))
1767 steam_do_deck_input_event(steam, input, data);
1768 sensors = rcu_dereference(steam->sensors);
1769 if (likely(sensors))
1770 steam_do_deck_sensors_event(steam, sensors, data);
1771 rcu_read_unlock();
1772 break;
1773 case ID_CONTROLLER_WIRELESS:
1774 /*
1775 * The payload of this event is a single byte:
1776 * 0x01: disconnected.
1777 * 0x02: connected.
1778 */
1779 switch (data[4]) {
1780 case 0x01:
1781 steam_do_connect_event(steam, false);
1782 break;
1783 case 0x02:
1784 steam_do_connect_event(steam, true);
1785 break;
1786 }
1787 break;
1788 case ID_CONTROLLER_STATUS:
1789 if (steam->quirks & STEAM_QUIRK_WIRELESS) {
1790 rcu_read_lock();
1791 battery = rcu_dereference(steam->battery);
1792 if (likely(battery)) {
1793 steam_do_battery_event(steam, battery, data);
1794 } else {
1795 dbg_hid(
1796 "%s: battery data without connect event\n",
1797 __func__);
1798 steam_do_connect_event(steam, true);
1799 }
1800 rcu_read_unlock();
1801 }
1802 break;
1803 }
1804 return 0;
1805 }
1806
steam_param_set_lizard_mode(const char * val,const struct kernel_param * kp)1807 static int steam_param_set_lizard_mode(const char *val,
1808 const struct kernel_param *kp)
1809 {
1810 struct steam_device *steam;
1811 int ret;
1812
1813 ret = param_set_bool(val, kp);
1814 if (ret)
1815 return ret;
1816
1817 mutex_lock(&steam_devices_lock);
1818 list_for_each_entry(steam, &steam_devices, list) {
1819 if (!steam->client_opened)
1820 steam_set_lizard_mode(steam, lizard_mode);
1821 }
1822 mutex_unlock(&steam_devices_lock);
1823 return 0;
1824 }
1825
1826 static const struct kernel_param_ops steam_lizard_mode_ops = {
1827 .set = steam_param_set_lizard_mode,
1828 .get = param_get_bool,
1829 };
1830
1831 module_param_cb(lizard_mode, &steam_lizard_mode_ops, &lizard_mode, 0644);
1832 MODULE_PARM_DESC(lizard_mode,
1833 "Enable mouse and keyboard emulation (lizard mode) when the gamepad is not in use");
1834
1835 static const struct hid_device_id steam_controllers[] = {
1836 { /* Wired Steam Controller */
1837 HID_USB_DEVICE(USB_VENDOR_ID_VALVE,
1838 USB_DEVICE_ID_STEAM_CONTROLLER)
1839 },
1840 { /* Wireless Steam Controller */
1841 HID_USB_DEVICE(USB_VENDOR_ID_VALVE,
1842 USB_DEVICE_ID_STEAM_CONTROLLER_WIRELESS),
1843 .driver_data = STEAM_QUIRK_WIRELESS
1844 },
1845 { /* Steam Deck */
1846 HID_USB_DEVICE(USB_VENDOR_ID_VALVE,
1847 USB_DEVICE_ID_STEAM_DECK),
1848 .driver_data = STEAM_QUIRK_DECK
1849 },
1850 {}
1851 };
1852
1853 MODULE_DEVICE_TABLE(hid, steam_controllers);
1854
1855 static struct hid_driver steam_controller_driver = {
1856 .name = "hid-steam",
1857 .id_table = steam_controllers,
1858 .probe = steam_probe,
1859 .remove = steam_remove,
1860 .raw_event = steam_raw_event,
1861 };
1862
1863 module_hid_driver(steam_controller_driver);
1864