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c164d6ab RRC |
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 | * | |
7 | * Supports both the wired and wireless interfaces. | |
8 | * | |
9 | * This controller has a builtin emulation of mouse and keyboard: the right pad | |
10 | * can be used as a mouse, the shoulder buttons are mouse buttons, A and B | |
11 | * buttons are ENTER and ESCAPE, and so on. This is implemented as additional | |
12 | * HID interfaces. | |
13 | * | |
14 | * This is known as the "lizard mode", because apparently lizards like to use | |
15 | * the computer from the coach, without a proper mouse and keyboard. | |
16 | * | |
17 | * This driver will disable the lizard mode when the input device is opened | |
18 | * and re-enable it when the input device is closed, so as not to break user | |
19 | * mode behaviour. The lizard_mode parameter can be used to change that. | |
20 | * | |
21 | * There are a few user space applications (notably Steam Client) that use | |
22 | * the hidraw interface directly to create input devices (XTest, uinput...). | |
23 | * In order to avoid breaking them this driver creates a layered hidraw device, | |
24 | * so it can detect when the client is running and then: | |
25 | * - it will not send any command to the controller. | |
385a4886 | 26 | * - this input device will be removed, to avoid double input of the same |
c164d6ab | 27 | * user action. |
385a4886 | 28 | * When the client is closed, this input device will be created again. |
c164d6ab RRC |
29 | * |
30 | * For additional functions, such as changing the right-pad margin or switching | |
31 | * the led, you can use the user-space tool at: | |
32 | * | |
33 | * https://github.com/rodrigorc/steamctrl | |
34 | */ | |
35 | ||
36 | #include <linux/device.h> | |
37 | #include <linux/input.h> | |
38 | #include <linux/hid.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/workqueue.h> | |
41 | #include <linux/mutex.h> | |
42 | #include <linux/rcupdate.h> | |
43 | #include <linux/delay.h> | |
f8271979 | 44 | #include <linux/power_supply.h> |
c164d6ab RRC |
45 | #include "hid-ids.h" |
46 | ||
47 | MODULE_LICENSE("GPL"); | |
48 | MODULE_AUTHOR("Rodrigo Rivas Costa <rodrigorivascosta@gmail.com>"); | |
49 | ||
50 | static bool lizard_mode = true; | |
51 | ||
52 | static DEFINE_MUTEX(steam_devices_lock); | |
53 | static LIST_HEAD(steam_devices); | |
54 | ||
55 | #define STEAM_QUIRK_WIRELESS BIT(0) | |
56 | ||
57 | /* Touch pads are 40 mm in diameter and 65535 units */ | |
58 | #define STEAM_PAD_RESOLUTION 1638 | |
59 | /* Trigger runs are about 5 mm and 256 units */ | |
60 | #define STEAM_TRIGGER_RESOLUTION 51 | |
61 | /* Joystick runs are about 5 mm and 256 units */ | |
62 | #define STEAM_JOYSTICK_RESOLUTION 51 | |
63 | ||
64 | #define STEAM_PAD_FUZZ 256 | |
65 | ||
66 | /* | |
67 | * Commands that can be sent in a feature report. | |
68 | * Thanks to Valve for some valuable hints. | |
69 | */ | |
70 | #define STEAM_CMD_SET_MAPPINGS 0x80 | |
71 | #define STEAM_CMD_CLEAR_MAPPINGS 0x81 | |
72 | #define STEAM_CMD_GET_MAPPINGS 0x82 | |
73 | #define STEAM_CMD_GET_ATTRIB 0x83 | |
74 | #define STEAM_CMD_GET_ATTRIB_LABEL 0x84 | |
75 | #define STEAM_CMD_DEFAULT_MAPPINGS 0x85 | |
76 | #define STEAM_CMD_FACTORY_RESET 0x86 | |
77 | #define STEAM_CMD_WRITE_REGISTER 0x87 | |
78 | #define STEAM_CMD_CLEAR_REGISTER 0x88 | |
79 | #define STEAM_CMD_READ_REGISTER 0x89 | |
80 | #define STEAM_CMD_GET_REGISTER_LABEL 0x8a | |
81 | #define STEAM_CMD_GET_REGISTER_MAX 0x8b | |
82 | #define STEAM_CMD_GET_REGISTER_DEFAULT 0x8c | |
83 | #define STEAM_CMD_SET_MODE 0x8d | |
84 | #define STEAM_CMD_DEFAULT_MOUSE 0x8e | |
85 | #define STEAM_CMD_FORCEFEEDBAK 0x8f | |
86 | #define STEAM_CMD_REQUEST_COMM_STATUS 0xb4 | |
87 | #define STEAM_CMD_GET_SERIAL 0xae | |
88 | ||
89 | /* Some useful register ids */ | |
90 | #define STEAM_REG_LPAD_MODE 0x07 | |
91 | #define STEAM_REG_RPAD_MODE 0x08 | |
92 | #define STEAM_REG_RPAD_MARGIN 0x18 | |
93 | #define STEAM_REG_LED 0x2d | |
94 | #define STEAM_REG_GYRO_MODE 0x30 | |
95 | ||
96 | /* Raw event identifiers */ | |
97 | #define STEAM_EV_INPUT_DATA 0x01 | |
98 | #define STEAM_EV_CONNECT 0x03 | |
99 | #define STEAM_EV_BATTERY 0x04 | |
100 | ||
101 | /* Values for GYRO_MODE (bitmask) */ | |
102 | #define STEAM_GYRO_MODE_OFF 0x0000 | |
103 | #define STEAM_GYRO_MODE_STEERING 0x0001 | |
104 | #define STEAM_GYRO_MODE_TILT 0x0002 | |
105 | #define STEAM_GYRO_MODE_SEND_ORIENTATION 0x0004 | |
106 | #define STEAM_GYRO_MODE_SEND_RAW_ACCEL 0x0008 | |
107 | #define STEAM_GYRO_MODE_SEND_RAW_GYRO 0x0010 | |
108 | ||
109 | /* Other random constants */ | |
110 | #define STEAM_SERIAL_LEN 10 | |
111 | ||
112 | struct steam_device { | |
113 | struct list_head list; | |
114 | spinlock_t lock; | |
115 | struct hid_device *hdev, *client_hdev; | |
116 | struct mutex mutex; | |
385a4886 | 117 | bool client_opened; |
c164d6ab RRC |
118 | struct input_dev __rcu *input; |
119 | unsigned long quirks; | |
120 | struct work_struct work_connect; | |
121 | bool connected; | |
122 | char serial_no[STEAM_SERIAL_LEN + 1]; | |
f8271979 RRC |
123 | struct power_supply_desc battery_desc; |
124 | struct power_supply __rcu *battery; | |
125 | u8 battery_charge; | |
126 | u16 voltage; | |
c164d6ab RRC |
127 | }; |
128 | ||
129 | static int steam_recv_report(struct steam_device *steam, | |
130 | u8 *data, int size) | |
131 | { | |
132 | struct hid_report *r; | |
133 | u8 *buf; | |
134 | int ret; | |
135 | ||
136 | r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0]; | |
137 | if (hid_report_len(r) < 64) | |
138 | return -EINVAL; | |
139 | ||
140 | buf = hid_alloc_report_buf(r, GFP_KERNEL); | |
141 | if (!buf) | |
142 | return -ENOMEM; | |
143 | ||
144 | /* | |
145 | * The report ID is always 0, so strip the first byte from the output. | |
146 | * hid_report_len() is not counting the report ID, so +1 to the length | |
147 | * or else we get a EOVERFLOW. We are safe from a buffer overflow | |
148 | * because hid_alloc_report_buf() allocates +7 bytes. | |
149 | */ | |
150 | ret = hid_hw_raw_request(steam->hdev, 0x00, | |
151 | buf, hid_report_len(r) + 1, | |
152 | HID_FEATURE_REPORT, HID_REQ_GET_REPORT); | |
153 | if (ret > 0) | |
154 | memcpy(data, buf + 1, min(size, ret - 1)); | |
155 | kfree(buf); | |
156 | return ret; | |
157 | } | |
158 | ||
159 | static int steam_send_report(struct steam_device *steam, | |
160 | u8 *cmd, int size) | |
161 | { | |
162 | struct hid_report *r; | |
163 | u8 *buf; | |
164 | unsigned int retries = 50; | |
165 | int ret; | |
166 | ||
167 | r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0]; | |
168 | if (hid_report_len(r) < 64) | |
169 | return -EINVAL; | |
170 | ||
171 | buf = hid_alloc_report_buf(r, GFP_KERNEL); | |
172 | if (!buf) | |
173 | return -ENOMEM; | |
174 | ||
175 | /* The report ID is always 0 */ | |
176 | memcpy(buf + 1, cmd, size); | |
177 | ||
178 | /* | |
179 | * Sometimes the wireless controller fails with EPIPE | |
180 | * when sending a feature report. | |
181 | * Doing a HID_REQ_GET_REPORT and waiting for a while | |
182 | * seems to fix that. | |
183 | */ | |
184 | do { | |
185 | ret = hid_hw_raw_request(steam->hdev, 0, | |
186 | buf, size + 1, | |
187 | HID_FEATURE_REPORT, HID_REQ_SET_REPORT); | |
188 | if (ret != -EPIPE) | |
189 | break; | |
190 | msleep(20); | |
191 | } while (--retries); | |
192 | ||
193 | kfree(buf); | |
194 | if (ret < 0) | |
195 | hid_err(steam->hdev, "%s: error %d (%*ph)\n", __func__, | |
196 | ret, size, cmd); | |
197 | return ret; | |
198 | } | |
199 | ||
200 | static inline int steam_send_report_byte(struct steam_device *steam, u8 cmd) | |
201 | { | |
202 | return steam_send_report(steam, &cmd, 1); | |
203 | } | |
204 | ||
205 | static int steam_write_registers(struct steam_device *steam, | |
206 | /* u8 reg, u16 val */...) | |
207 | { | |
208 | /* Send: 0x87 len (reg valLo valHi)* */ | |
209 | u8 reg; | |
210 | u16 val; | |
211 | u8 cmd[64] = {STEAM_CMD_WRITE_REGISTER, 0x00}; | |
212 | va_list args; | |
213 | ||
214 | va_start(args, steam); | |
215 | for (;;) { | |
216 | reg = va_arg(args, int); | |
217 | if (reg == 0) | |
218 | break; | |
219 | val = va_arg(args, int); | |
220 | cmd[cmd[1] + 2] = reg; | |
221 | cmd[cmd[1] + 3] = val & 0xff; | |
222 | cmd[cmd[1] + 4] = val >> 8; | |
223 | cmd[1] += 3; | |
224 | } | |
225 | va_end(args); | |
226 | ||
227 | return steam_send_report(steam, cmd, 2 + cmd[1]); | |
228 | } | |
229 | ||
230 | static int steam_get_serial(struct steam_device *steam) | |
231 | { | |
232 | /* | |
233 | * Send: 0xae 0x15 0x01 | |
234 | * Recv: 0xae 0x15 0x01 serialnumber (10 chars) | |
235 | */ | |
236 | int ret; | |
237 | u8 cmd[] = {STEAM_CMD_GET_SERIAL, 0x15, 0x01}; | |
238 | u8 reply[3 + STEAM_SERIAL_LEN + 1]; | |
239 | ||
240 | ret = steam_send_report(steam, cmd, sizeof(cmd)); | |
241 | if (ret < 0) | |
242 | return ret; | |
243 | ret = steam_recv_report(steam, reply, sizeof(reply)); | |
244 | if (ret < 0) | |
245 | return ret; | |
246 | if (reply[0] != 0xae || reply[1] != 0x15 || reply[2] != 0x01) | |
247 | return -EIO; | |
248 | reply[3 + STEAM_SERIAL_LEN] = 0; | |
249 | strlcpy(steam->serial_no, reply + 3, sizeof(steam->serial_no)); | |
250 | return 0; | |
251 | } | |
252 | ||
253 | /* | |
254 | * This command requests the wireless adaptor to post an event | |
255 | * with the connection status. Useful if this driver is loaded when | |
256 | * the controller is already connected. | |
257 | */ | |
258 | static inline int steam_request_conn_status(struct steam_device *steam) | |
259 | { | |
260 | return steam_send_report_byte(steam, STEAM_CMD_REQUEST_COMM_STATUS); | |
261 | } | |
262 | ||
263 | static void steam_set_lizard_mode(struct steam_device *steam, bool enable) | |
264 | { | |
265 | if (enable) { | |
266 | /* enable esc, enter, cursors */ | |
267 | steam_send_report_byte(steam, STEAM_CMD_DEFAULT_MAPPINGS); | |
268 | /* enable mouse */ | |
269 | steam_send_report_byte(steam, STEAM_CMD_DEFAULT_MOUSE); | |
270 | steam_write_registers(steam, | |
271 | STEAM_REG_RPAD_MARGIN, 0x01, /* enable margin */ | |
272 | 0); | |
273 | } else { | |
274 | /* disable esc, enter, cursor */ | |
275 | steam_send_report_byte(steam, STEAM_CMD_CLEAR_MAPPINGS); | |
276 | steam_write_registers(steam, | |
277 | STEAM_REG_RPAD_MODE, 0x07, /* disable mouse */ | |
278 | STEAM_REG_RPAD_MARGIN, 0x00, /* disable margin */ | |
279 | 0); | |
280 | } | |
281 | } | |
282 | ||
c164d6ab RRC |
283 | static int steam_input_open(struct input_dev *dev) |
284 | { | |
285 | struct steam_device *steam = input_get_drvdata(dev); | |
c164d6ab RRC |
286 | |
287 | mutex_lock(&steam->mutex); | |
c164d6ab RRC |
288 | if (!steam->client_opened && lizard_mode) |
289 | steam_set_lizard_mode(steam, false); | |
290 | mutex_unlock(&steam->mutex); | |
291 | return 0; | |
292 | } | |
293 | ||
294 | static void steam_input_close(struct input_dev *dev) | |
295 | { | |
296 | struct steam_device *steam = input_get_drvdata(dev); | |
297 | ||
298 | mutex_lock(&steam->mutex); | |
c164d6ab RRC |
299 | if (!steam->client_opened && lizard_mode) |
300 | steam_set_lizard_mode(steam, true); | |
301 | mutex_unlock(&steam->mutex); | |
c164d6ab RRC |
302 | } |
303 | ||
f8271979 RRC |
304 | static enum power_supply_property steam_battery_props[] = { |
305 | POWER_SUPPLY_PROP_PRESENT, | |
306 | POWER_SUPPLY_PROP_SCOPE, | |
307 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
308 | POWER_SUPPLY_PROP_CAPACITY, | |
309 | }; | |
310 | ||
311 | static int steam_battery_get_property(struct power_supply *psy, | |
312 | enum power_supply_property psp, | |
313 | union power_supply_propval *val) | |
314 | { | |
315 | struct steam_device *steam = power_supply_get_drvdata(psy); | |
316 | unsigned long flags; | |
317 | s16 volts; | |
318 | u8 batt; | |
319 | int ret = 0; | |
320 | ||
321 | spin_lock_irqsave(&steam->lock, flags); | |
322 | volts = steam->voltage; | |
323 | batt = steam->battery_charge; | |
324 | spin_unlock_irqrestore(&steam->lock, flags); | |
325 | ||
326 | switch (psp) { | |
327 | case POWER_SUPPLY_PROP_PRESENT: | |
328 | val->intval = 1; | |
329 | break; | |
330 | case POWER_SUPPLY_PROP_SCOPE: | |
331 | val->intval = POWER_SUPPLY_SCOPE_DEVICE; | |
332 | break; | |
333 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
334 | val->intval = volts * 1000; /* mV -> uV */ | |
335 | break; | |
336 | case POWER_SUPPLY_PROP_CAPACITY: | |
337 | val->intval = batt; | |
338 | break; | |
339 | default: | |
340 | ret = -EINVAL; | |
341 | break; | |
342 | } | |
343 | return ret; | |
344 | } | |
345 | ||
346 | static int steam_battery_register(struct steam_device *steam) | |
347 | { | |
348 | struct power_supply *battery; | |
349 | struct power_supply_config battery_cfg = { .drv_data = steam, }; | |
350 | unsigned long flags; | |
351 | int ret; | |
352 | ||
353 | steam->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY; | |
354 | steam->battery_desc.properties = steam_battery_props; | |
355 | steam->battery_desc.num_properties = ARRAY_SIZE(steam_battery_props); | |
356 | steam->battery_desc.get_property = steam_battery_get_property; | |
357 | steam->battery_desc.name = devm_kasprintf(&steam->hdev->dev, | |
358 | GFP_KERNEL, "steam-controller-%s-battery", | |
359 | steam->serial_no); | |
360 | if (!steam->battery_desc.name) | |
361 | return -ENOMEM; | |
362 | ||
363 | /* avoid the warning of 0% battery while waiting for the first info */ | |
364 | spin_lock_irqsave(&steam->lock, flags); | |
365 | steam->voltage = 3000; | |
366 | steam->battery_charge = 100; | |
367 | spin_unlock_irqrestore(&steam->lock, flags); | |
368 | ||
369 | battery = power_supply_register(&steam->hdev->dev, | |
370 | &steam->battery_desc, &battery_cfg); | |
371 | if (IS_ERR(battery)) { | |
372 | ret = PTR_ERR(battery); | |
373 | hid_err(steam->hdev, | |
374 | "%s:power_supply_register failed with error %d\n", | |
375 | __func__, ret); | |
376 | return ret; | |
377 | } | |
378 | rcu_assign_pointer(steam->battery, battery); | |
379 | power_supply_powers(battery, &steam->hdev->dev); | |
380 | return 0; | |
381 | } | |
382 | ||
385a4886 | 383 | static int steam_input_register(struct steam_device *steam) |
c164d6ab RRC |
384 | { |
385 | struct hid_device *hdev = steam->hdev; | |
386 | struct input_dev *input; | |
387 | int ret; | |
388 | ||
389 | rcu_read_lock(); | |
390 | input = rcu_dereference(steam->input); | |
391 | rcu_read_unlock(); | |
392 | if (input) { | |
393 | dbg_hid("%s: already connected\n", __func__); | |
394 | return 0; | |
395 | } | |
396 | ||
c164d6ab RRC |
397 | input = input_allocate_device(); |
398 | if (!input) | |
399 | return -ENOMEM; | |
400 | ||
401 | input_set_drvdata(input, steam); | |
402 | input->dev.parent = &hdev->dev; | |
403 | input->open = steam_input_open; | |
404 | input->close = steam_input_close; | |
405 | ||
406 | input->name = (steam->quirks & STEAM_QUIRK_WIRELESS) ? | |
407 | "Wireless Steam Controller" : | |
408 | "Steam Controller"; | |
409 | input->phys = hdev->phys; | |
410 | input->uniq = steam->serial_no; | |
411 | input->id.bustype = hdev->bus; | |
412 | input->id.vendor = hdev->vendor; | |
413 | input->id.product = hdev->product; | |
414 | input->id.version = hdev->version; | |
415 | ||
416 | input_set_capability(input, EV_KEY, BTN_TR2); | |
417 | input_set_capability(input, EV_KEY, BTN_TL2); | |
418 | input_set_capability(input, EV_KEY, BTN_TR); | |
419 | input_set_capability(input, EV_KEY, BTN_TL); | |
420 | input_set_capability(input, EV_KEY, BTN_Y); | |
421 | input_set_capability(input, EV_KEY, BTN_B); | |
422 | input_set_capability(input, EV_KEY, BTN_X); | |
423 | input_set_capability(input, EV_KEY, BTN_A); | |
424 | input_set_capability(input, EV_KEY, BTN_DPAD_UP); | |
425 | input_set_capability(input, EV_KEY, BTN_DPAD_RIGHT); | |
426 | input_set_capability(input, EV_KEY, BTN_DPAD_LEFT); | |
427 | input_set_capability(input, EV_KEY, BTN_DPAD_DOWN); | |
428 | input_set_capability(input, EV_KEY, BTN_SELECT); | |
429 | input_set_capability(input, EV_KEY, BTN_MODE); | |
430 | input_set_capability(input, EV_KEY, BTN_START); | |
431 | input_set_capability(input, EV_KEY, BTN_GEAR_DOWN); | |
432 | input_set_capability(input, EV_KEY, BTN_GEAR_UP); | |
433 | input_set_capability(input, EV_KEY, BTN_THUMBR); | |
434 | input_set_capability(input, EV_KEY, BTN_THUMBL); | |
435 | input_set_capability(input, EV_KEY, BTN_THUMB); | |
436 | input_set_capability(input, EV_KEY, BTN_THUMB2); | |
437 | ||
438 | input_set_abs_params(input, ABS_HAT2Y, 0, 255, 0, 0); | |
439 | input_set_abs_params(input, ABS_HAT2X, 0, 255, 0, 0); | |
440 | input_set_abs_params(input, ABS_X, -32767, 32767, 0, 0); | |
441 | input_set_abs_params(input, ABS_Y, -32767, 32767, 0, 0); | |
442 | input_set_abs_params(input, ABS_RX, -32767, 32767, | |
443 | STEAM_PAD_FUZZ, 0); | |
444 | input_set_abs_params(input, ABS_RY, -32767, 32767, | |
445 | STEAM_PAD_FUZZ, 0); | |
446 | input_set_abs_params(input, ABS_HAT0X, -32767, 32767, | |
447 | STEAM_PAD_FUZZ, 0); | |
448 | input_set_abs_params(input, ABS_HAT0Y, -32767, 32767, | |
449 | STEAM_PAD_FUZZ, 0); | |
450 | input_abs_set_res(input, ABS_X, STEAM_JOYSTICK_RESOLUTION); | |
451 | input_abs_set_res(input, ABS_Y, STEAM_JOYSTICK_RESOLUTION); | |
452 | input_abs_set_res(input, ABS_RX, STEAM_PAD_RESOLUTION); | |
453 | input_abs_set_res(input, ABS_RY, STEAM_PAD_RESOLUTION); | |
454 | input_abs_set_res(input, ABS_HAT0X, STEAM_PAD_RESOLUTION); | |
455 | input_abs_set_res(input, ABS_HAT0Y, STEAM_PAD_RESOLUTION); | |
456 | input_abs_set_res(input, ABS_HAT2Y, STEAM_TRIGGER_RESOLUTION); | |
457 | input_abs_set_res(input, ABS_HAT2X, STEAM_TRIGGER_RESOLUTION); | |
458 | ||
459 | ret = input_register_device(input); | |
460 | if (ret) | |
461 | goto input_register_fail; | |
462 | ||
463 | rcu_assign_pointer(steam->input, input); | |
c164d6ab RRC |
464 | return 0; |
465 | ||
466 | input_register_fail: | |
467 | input_free_device(input); | |
468 | return ret; | |
469 | } | |
470 | ||
385a4886 | 471 | static void steam_input_unregister(struct steam_device *steam) |
c164d6ab RRC |
472 | { |
473 | struct input_dev *input; | |
385a4886 RRC |
474 | rcu_read_lock(); |
475 | input = rcu_dereference(steam->input); | |
476 | rcu_read_unlock(); | |
477 | if (!input) | |
478 | return; | |
479 | RCU_INIT_POINTER(steam->input, NULL); | |
480 | synchronize_rcu(); | |
481 | input_unregister_device(input); | |
482 | } | |
483 | ||
484 | static void steam_battery_unregister(struct steam_device *steam) | |
485 | { | |
f8271979 | 486 | struct power_supply *battery; |
c164d6ab RRC |
487 | |
488 | rcu_read_lock(); | |
f8271979 | 489 | battery = rcu_dereference(steam->battery); |
c164d6ab RRC |
490 | rcu_read_unlock(); |
491 | ||
385a4886 RRC |
492 | if (!battery) |
493 | return; | |
494 | RCU_INIT_POINTER(steam->battery, NULL); | |
495 | synchronize_rcu(); | |
496 | power_supply_unregister(battery); | |
497 | } | |
498 | ||
499 | static int steam_register(struct steam_device *steam) | |
500 | { | |
501 | int ret; | |
6b538cc2 | 502 | bool client_opened; |
385a4886 RRC |
503 | |
504 | /* | |
505 | * This function can be called several times in a row with the | |
506 | * wireless adaptor, without steam_unregister() between them, because | |
507 | * another client send a get_connection_status command, for example. | |
508 | * The battery and serial number are set just once per device. | |
509 | */ | |
510 | if (!steam->serial_no[0]) { | |
511 | /* | |
512 | * Unlikely, but getting the serial could fail, and it is not so | |
513 | * important, so make up a serial number and go on. | |
514 | */ | |
6b538cc2 | 515 | mutex_lock(&steam->mutex); |
385a4886 RRC |
516 | if (steam_get_serial(steam) < 0) |
517 | strlcpy(steam->serial_no, "XXXXXXXXXX", | |
518 | sizeof(steam->serial_no)); | |
6b538cc2 | 519 | mutex_unlock(&steam->mutex); |
385a4886 RRC |
520 | |
521 | hid_info(steam->hdev, "Steam Controller '%s' connected", | |
522 | steam->serial_no); | |
523 | ||
524 | /* ignore battery errors, we can live without it */ | |
525 | if (steam->quirks & STEAM_QUIRK_WIRELESS) | |
526 | steam_battery_register(steam); | |
527 | ||
528 | mutex_lock(&steam_devices_lock); | |
2d3f53a8 RRC |
529 | if (list_empty(&steam->list)) |
530 | list_add(&steam->list, &steam_devices); | |
385a4886 | 531 | mutex_unlock(&steam_devices_lock); |
f8271979 | 532 | } |
385a4886 RRC |
533 | |
534 | mutex_lock(&steam->mutex); | |
6b538cc2 RRC |
535 | client_opened = steam->client_opened; |
536 | if (!client_opened) | |
385a4886 | 537 | steam_set_lizard_mode(steam, lizard_mode); |
6b538cc2 RRC |
538 | mutex_unlock(&steam->mutex); |
539 | ||
540 | if (!client_opened) | |
385a4886 | 541 | ret = steam_input_register(steam); |
6b538cc2 | 542 | else |
385a4886 | 543 | ret = 0; |
385a4886 RRC |
544 | |
545 | return ret; | |
546 | } | |
547 | ||
548 | static void steam_unregister(struct steam_device *steam) | |
549 | { | |
550 | steam_battery_unregister(steam); | |
551 | steam_input_unregister(steam); | |
552 | if (steam->serial_no[0]) { | |
c164d6ab RRC |
553 | hid_info(steam->hdev, "Steam Controller '%s' disconnected", |
554 | steam->serial_no); | |
385a4886 | 555 | mutex_lock(&steam_devices_lock); |
2d3f53a8 | 556 | list_del_init(&steam->list); |
385a4886 RRC |
557 | mutex_unlock(&steam_devices_lock); |
558 | steam->serial_no[0] = 0; | |
c164d6ab RRC |
559 | } |
560 | } | |
561 | ||
562 | static void steam_work_connect_cb(struct work_struct *work) | |
563 | { | |
564 | struct steam_device *steam = container_of(work, struct steam_device, | |
565 | work_connect); | |
566 | unsigned long flags; | |
567 | bool connected; | |
568 | int ret; | |
569 | ||
570 | spin_lock_irqsave(&steam->lock, flags); | |
571 | connected = steam->connected; | |
572 | spin_unlock_irqrestore(&steam->lock, flags); | |
573 | ||
574 | if (connected) { | |
575 | ret = steam_register(steam); | |
576 | if (ret) { | |
577 | hid_err(steam->hdev, | |
578 | "%s:steam_register failed with error %d\n", | |
579 | __func__, ret); | |
580 | } | |
581 | } else { | |
582 | steam_unregister(steam); | |
583 | } | |
584 | } | |
585 | ||
586 | static bool steam_is_valve_interface(struct hid_device *hdev) | |
587 | { | |
588 | struct hid_report_enum *rep_enum; | |
589 | ||
590 | /* | |
591 | * The wired device creates 3 interfaces: | |
592 | * 0: emulated mouse. | |
593 | * 1: emulated keyboard. | |
594 | * 2: the real game pad. | |
595 | * The wireless device creates 5 interfaces: | |
596 | * 0: emulated keyboard. | |
597 | * 1-4: slots where up to 4 real game pads will be connected to. | |
598 | * We know which one is the real gamepad interface because they are the | |
599 | * only ones with a feature report. | |
600 | */ | |
601 | rep_enum = &hdev->report_enum[HID_FEATURE_REPORT]; | |
602 | return !list_empty(&rep_enum->report_list); | |
603 | } | |
604 | ||
605 | static int steam_client_ll_parse(struct hid_device *hdev) | |
606 | { | |
4bff980f | 607 | struct steam_device *steam = hdev->driver_data; |
c164d6ab RRC |
608 | |
609 | return hid_parse_report(hdev, steam->hdev->dev_rdesc, | |
610 | steam->hdev->dev_rsize); | |
611 | } | |
612 | ||
613 | static int steam_client_ll_start(struct hid_device *hdev) | |
614 | { | |
615 | return 0; | |
616 | } | |
617 | ||
618 | static void steam_client_ll_stop(struct hid_device *hdev) | |
619 | { | |
620 | } | |
621 | ||
622 | static int steam_client_ll_open(struct hid_device *hdev) | |
623 | { | |
4bff980f | 624 | struct steam_device *steam = hdev->driver_data; |
c164d6ab RRC |
625 | |
626 | mutex_lock(&steam->mutex); | |
627 | steam->client_opened = true; | |
628 | mutex_unlock(&steam->mutex); | |
385a4886 RRC |
629 | |
630 | steam_input_unregister(steam); | |
631 | ||
cf28aee2 | 632 | return 0; |
c164d6ab RRC |
633 | } |
634 | ||
635 | static void steam_client_ll_close(struct hid_device *hdev) | |
636 | { | |
4bff980f | 637 | struct steam_device *steam = hdev->driver_data; |
c164d6ab | 638 | |
6b538cc2 RRC |
639 | unsigned long flags; |
640 | bool connected; | |
641 | ||
642 | spin_lock_irqsave(&steam->lock, flags); | |
643 | connected = steam->connected; | |
644 | spin_unlock_irqrestore(&steam->lock, flags); | |
645 | ||
c164d6ab RRC |
646 | mutex_lock(&steam->mutex); |
647 | steam->client_opened = false; | |
6b538cc2 RRC |
648 | if (connected) |
649 | steam_set_lizard_mode(steam, lizard_mode); | |
c164d6ab RRC |
650 | mutex_unlock(&steam->mutex); |
651 | ||
6b538cc2 | 652 | if (connected) |
385a4886 | 653 | steam_input_register(steam); |
c164d6ab RRC |
654 | } |
655 | ||
656 | static int steam_client_ll_raw_request(struct hid_device *hdev, | |
657 | unsigned char reportnum, u8 *buf, | |
658 | size_t count, unsigned char report_type, | |
659 | int reqtype) | |
660 | { | |
4bff980f | 661 | struct steam_device *steam = hdev->driver_data; |
c164d6ab RRC |
662 | |
663 | return hid_hw_raw_request(steam->hdev, reportnum, buf, count, | |
664 | report_type, reqtype); | |
665 | } | |
666 | ||
667 | static struct hid_ll_driver steam_client_ll_driver = { | |
668 | .parse = steam_client_ll_parse, | |
669 | .start = steam_client_ll_start, | |
670 | .stop = steam_client_ll_stop, | |
671 | .open = steam_client_ll_open, | |
672 | .close = steam_client_ll_close, | |
673 | .raw_request = steam_client_ll_raw_request, | |
674 | }; | |
675 | ||
676 | static struct hid_device *steam_create_client_hid(struct hid_device *hdev) | |
677 | { | |
678 | struct hid_device *client_hdev; | |
679 | ||
680 | client_hdev = hid_allocate_device(); | |
681 | if (IS_ERR(client_hdev)) | |
682 | return client_hdev; | |
683 | ||
684 | client_hdev->ll_driver = &steam_client_ll_driver; | |
685 | client_hdev->dev.parent = hdev->dev.parent; | |
686 | client_hdev->bus = hdev->bus; | |
687 | client_hdev->vendor = hdev->vendor; | |
688 | client_hdev->product = hdev->product; | |
165e2cad JK |
689 | client_hdev->version = hdev->version; |
690 | client_hdev->type = hdev->type; | |
691 | client_hdev->country = hdev->country; | |
c164d6ab RRC |
692 | strlcpy(client_hdev->name, hdev->name, |
693 | sizeof(client_hdev->name)); | |
694 | strlcpy(client_hdev->phys, hdev->phys, | |
695 | sizeof(client_hdev->phys)); | |
696 | /* | |
697 | * Since we use the same device info than the real interface to | |
698 | * trick userspace, we will be calling steam_probe recursively. | |
699 | * We need to recognize the client interface somehow. | |
700 | */ | |
701 | client_hdev->group = HID_GROUP_STEAM; | |
702 | return client_hdev; | |
703 | } | |
704 | ||
705 | static int steam_probe(struct hid_device *hdev, | |
706 | const struct hid_device_id *id) | |
707 | { | |
708 | struct steam_device *steam; | |
709 | int ret; | |
710 | ||
711 | ret = hid_parse(hdev); | |
712 | if (ret) { | |
713 | hid_err(hdev, | |
714 | "%s:parse of hid interface failed\n", __func__); | |
715 | return ret; | |
716 | } | |
717 | ||
718 | /* | |
719 | * The virtual client_dev is only used for hidraw. | |
720 | * Also avoid the recursive probe. | |
721 | */ | |
722 | if (hdev->group == HID_GROUP_STEAM) | |
723 | return hid_hw_start(hdev, HID_CONNECT_HIDRAW); | |
724 | /* | |
725 | * The non-valve interfaces (mouse and keyboard emulation) are | |
726 | * connected without changes. | |
727 | */ | |
728 | if (!steam_is_valve_interface(hdev)) | |
729 | return hid_hw_start(hdev, HID_CONNECT_DEFAULT); | |
730 | ||
731 | steam = devm_kzalloc(&hdev->dev, sizeof(*steam), GFP_KERNEL); | |
732 | if (!steam) { | |
733 | ret = -ENOMEM; | |
734 | goto steam_alloc_fail; | |
735 | } | |
736 | steam->hdev = hdev; | |
737 | hid_set_drvdata(hdev, steam); | |
738 | spin_lock_init(&steam->lock); | |
739 | mutex_init(&steam->mutex); | |
740 | steam->quirks = id->driver_data; | |
741 | INIT_WORK(&steam->work_connect, steam_work_connect_cb); | |
2d3f53a8 | 742 | INIT_LIST_HEAD(&steam->list); |
c164d6ab RRC |
743 | |
744 | steam->client_hdev = steam_create_client_hid(hdev); | |
745 | if (IS_ERR(steam->client_hdev)) { | |
746 | ret = PTR_ERR(steam->client_hdev); | |
747 | goto client_hdev_fail; | |
748 | } | |
4bff980f | 749 | steam->client_hdev->driver_data = steam; |
c164d6ab RRC |
750 | |
751 | /* | |
752 | * With the real steam controller interface, do not connect hidraw. | |
753 | * Instead, create the client_hid and connect that. | |
754 | */ | |
755 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_HIDRAW); | |
756 | if (ret) | |
757 | goto hid_hw_start_fail; | |
758 | ||
759 | ret = hid_add_device(steam->client_hdev); | |
760 | if (ret) | |
761 | goto client_hdev_add_fail; | |
762 | ||
cf28aee2 RRC |
763 | ret = hid_hw_open(hdev); |
764 | if (ret) { | |
765 | hid_err(hdev, | |
766 | "%s:hid_hw_open\n", | |
767 | __func__); | |
768 | goto hid_hw_open_fail; | |
769 | } | |
770 | ||
c164d6ab | 771 | if (steam->quirks & STEAM_QUIRK_WIRELESS) { |
c164d6ab | 772 | hid_info(hdev, "Steam wireless receiver connected"); |
20eee6e5 RRC |
773 | /* If using a wireless adaptor ask for connection status */ |
774 | steam->connected = false; | |
c164d6ab RRC |
775 | steam_request_conn_status(steam); |
776 | } else { | |
20eee6e5 RRC |
777 | /* A wired connection is always present */ |
778 | steam->connected = true; | |
c164d6ab RRC |
779 | ret = steam_register(steam); |
780 | if (ret) { | |
781 | hid_err(hdev, | |
782 | "%s:steam_register failed with error %d\n", | |
783 | __func__, ret); | |
784 | goto input_register_fail; | |
785 | } | |
786 | } | |
787 | ||
c164d6ab RRC |
788 | return 0; |
789 | ||
c164d6ab | 790 | input_register_fail: |
cf28aee2 | 791 | hid_hw_open_fail: |
c164d6ab RRC |
792 | client_hdev_add_fail: |
793 | hid_hw_stop(hdev); | |
794 | hid_hw_start_fail: | |
795 | hid_destroy_device(steam->client_hdev); | |
796 | client_hdev_fail: | |
797 | cancel_work_sync(&steam->work_connect); | |
798 | steam_alloc_fail: | |
799 | hid_err(hdev, "%s: failed with error %d\n", | |
800 | __func__, ret); | |
801 | return ret; | |
802 | } | |
803 | ||
804 | static void steam_remove(struct hid_device *hdev) | |
805 | { | |
806 | struct steam_device *steam = hid_get_drvdata(hdev); | |
807 | ||
808 | if (!steam || hdev->group == HID_GROUP_STEAM) { | |
809 | hid_hw_stop(hdev); | |
810 | return; | |
811 | } | |
812 | ||
c164d6ab RRC |
813 | hid_destroy_device(steam->client_hdev); |
814 | steam->client_opened = false; | |
815 | cancel_work_sync(&steam->work_connect); | |
816 | if (steam->quirks & STEAM_QUIRK_WIRELESS) { | |
817 | hid_info(hdev, "Steam wireless receiver disconnected"); | |
c164d6ab | 818 | } |
cf28aee2 | 819 | hid_hw_close(hdev); |
c164d6ab RRC |
820 | hid_hw_stop(hdev); |
821 | steam_unregister(steam); | |
822 | } | |
823 | ||
824 | static void steam_do_connect_event(struct steam_device *steam, bool connected) | |
825 | { | |
826 | unsigned long flags; | |
385a4886 | 827 | bool changed; |
c164d6ab RRC |
828 | |
829 | spin_lock_irqsave(&steam->lock, flags); | |
385a4886 | 830 | changed = steam->connected != connected; |
c164d6ab RRC |
831 | steam->connected = connected; |
832 | spin_unlock_irqrestore(&steam->lock, flags); | |
833 | ||
385a4886 | 834 | if (changed && schedule_work(&steam->work_connect) == 0) |
c164d6ab RRC |
835 | dbg_hid("%s: connected=%d event already queued\n", |
836 | __func__, connected); | |
837 | } | |
838 | ||
839 | /* | |
840 | * Some input data in the protocol has the opposite sign. | |
841 | * Clamp the values to 32767..-32767 so that the range is | |
842 | * symmetrical and can be negated safely. | |
843 | */ | |
844 | static inline s16 steam_le16(u8 *data) | |
845 | { | |
846 | s16 x = (s16) le16_to_cpup((__le16 *)data); | |
847 | ||
848 | return x == -32768 ? -32767 : x; | |
849 | } | |
850 | ||
851 | /* | |
852 | * The size for this message payload is 60. | |
853 | * The known values are: | |
854 | * (* values are not sent through wireless) | |
855 | * (* accelerator/gyro is disabled by default) | |
856 | * Offset| Type | Mapped to |Meaning | |
857 | * -------+-------+-----------+-------------------------- | |
858 | * 4-7 | u32 | -- | sequence number | |
859 | * 8-10 | 24bit | see below | buttons | |
860 | * 11 | u8 | ABS_HAT2Y | left trigger | |
861 | * 12 | u8 | ABS_HAT2X | right trigger | |
862 | * 13-15 | -- | -- | always 0 | |
863 | * 16-17 | s16 | ABS_X/ABS_HAT0X | X value | |
864 | * 18-19 | s16 | ABS_Y/ABS_HAT0Y | Y value | |
865 | * 20-21 | s16 | ABS_RX | right-pad X value | |
866 | * 22-23 | s16 | ABS_RY | right-pad Y value | |
867 | * 24-25 | s16 | -- | * left trigger | |
868 | * 26-27 | s16 | -- | * right trigger | |
869 | * 28-29 | s16 | -- | * accelerometer X value | |
870 | * 30-31 | s16 | -- | * accelerometer Y value | |
871 | * 32-33 | s16 | -- | * accelerometer Z value | |
872 | * 34-35 | s16 | -- | gyro X value | |
873 | * 36-36 | s16 | -- | gyro Y value | |
874 | * 38-39 | s16 | -- | gyro Z value | |
875 | * 40-41 | s16 | -- | quaternion W value | |
876 | * 42-43 | s16 | -- | quaternion X value | |
877 | * 44-45 | s16 | -- | quaternion Y value | |
878 | * 46-47 | s16 | -- | quaternion Z value | |
879 | * 48-49 | -- | -- | always 0 | |
880 | * 50-51 | s16 | -- | * left trigger (uncalibrated) | |
881 | * 52-53 | s16 | -- | * right trigger (uncalibrated) | |
882 | * 54-55 | s16 | -- | * joystick X value (uncalibrated) | |
883 | * 56-57 | s16 | -- | * joystick Y value (uncalibrated) | |
884 | * 58-59 | s16 | -- | * left-pad X value | |
885 | * 60-61 | s16 | -- | * left-pad Y value | |
886 | * 62-63 | u16 | -- | * battery voltage | |
887 | * | |
888 | * The buttons are: | |
889 | * Bit | Mapped to | Description | |
890 | * ------+------------+-------------------------------- | |
891 | * 8.0 | BTN_TR2 | right trigger fully pressed | |
892 | * 8.1 | BTN_TL2 | left trigger fully pressed | |
893 | * 8.2 | BTN_TR | right shoulder | |
894 | * 8.3 | BTN_TL | left shoulder | |
895 | * 8.4 | BTN_Y | button Y | |
896 | * 8.5 | BTN_B | button B | |
897 | * 8.6 | BTN_X | button X | |
898 | * 8.7 | BTN_A | button A | |
899 | * 9.0 | BTN_DPAD_UP | lef-pad up | |
900 | * 9.1 | BTN_DPAD_RIGHT | lef-pad right | |
901 | * 9.2 | BTN_DPAD_LEFT | lef-pad left | |
902 | * 9.3 | BTN_DPAD_DOWN | lef-pad down | |
903 | * 9.4 | BTN_SELECT | menu left | |
904 | * 9.5 | BTN_MODE | steam logo | |
905 | * 9.6 | BTN_START | menu right | |
906 | * 9.7 | BTN_GEAR_DOWN | left back lever | |
907 | * 10.0 | BTN_GEAR_UP | right back lever | |
908 | * 10.1 | -- | left-pad clicked | |
909 | * 10.2 | BTN_THUMBR | right-pad clicked | |
910 | * 10.3 | BTN_THUMB | left-pad touched (but see explanation below) | |
911 | * 10.4 | BTN_THUMB2 | right-pad touched | |
912 | * 10.5 | -- | unknown | |
913 | * 10.6 | BTN_THUMBL | joystick clicked | |
914 | * 10.7 | -- | lpad_and_joy | |
915 | */ | |
916 | ||
917 | static void steam_do_input_event(struct steam_device *steam, | |
918 | struct input_dev *input, u8 *data) | |
919 | { | |
920 | /* 24 bits of buttons */ | |
921 | u8 b8, b9, b10; | |
922 | s16 x, y; | |
923 | bool lpad_touched, lpad_and_joy; | |
924 | ||
925 | b8 = data[8]; | |
926 | b9 = data[9]; | |
927 | b10 = data[10]; | |
928 | ||
929 | input_report_abs(input, ABS_HAT2Y, data[11]); | |
930 | input_report_abs(input, ABS_HAT2X, data[12]); | |
931 | ||
932 | /* | |
933 | * These two bits tells how to interpret the values X and Y. | |
934 | * lpad_and_joy tells that the joystick and the lpad are used at the | |
935 | * same time. | |
936 | * lpad_touched tells whether X/Y are to be read as lpad coord or | |
937 | * joystick values. | |
938 | * (lpad_touched || lpad_and_joy) tells if the lpad is really touched. | |
939 | */ | |
940 | lpad_touched = b10 & BIT(3); | |
941 | lpad_and_joy = b10 & BIT(7); | |
942 | x = steam_le16(data + 16); | |
943 | y = -steam_le16(data + 18); | |
944 | ||
945 | input_report_abs(input, lpad_touched ? ABS_HAT0X : ABS_X, x); | |
946 | input_report_abs(input, lpad_touched ? ABS_HAT0Y : ABS_Y, y); | |
947 | /* Check if joystick is centered */ | |
948 | if (lpad_touched && !lpad_and_joy) { | |
949 | input_report_abs(input, ABS_X, 0); | |
950 | input_report_abs(input, ABS_Y, 0); | |
951 | } | |
952 | /* Check if lpad is untouched */ | |
953 | if (!(lpad_touched || lpad_and_joy)) { | |
954 | input_report_abs(input, ABS_HAT0X, 0); | |
955 | input_report_abs(input, ABS_HAT0Y, 0); | |
956 | } | |
957 | ||
958 | input_report_abs(input, ABS_RX, steam_le16(data + 20)); | |
959 | input_report_abs(input, ABS_RY, -steam_le16(data + 22)); | |
960 | ||
961 | input_event(input, EV_KEY, BTN_TR2, !!(b8 & BIT(0))); | |
962 | input_event(input, EV_KEY, BTN_TL2, !!(b8 & BIT(1))); | |
963 | input_event(input, EV_KEY, BTN_TR, !!(b8 & BIT(2))); | |
964 | input_event(input, EV_KEY, BTN_TL, !!(b8 & BIT(3))); | |
965 | input_event(input, EV_KEY, BTN_Y, !!(b8 & BIT(4))); | |
966 | input_event(input, EV_KEY, BTN_B, !!(b8 & BIT(5))); | |
967 | input_event(input, EV_KEY, BTN_X, !!(b8 & BIT(6))); | |
968 | input_event(input, EV_KEY, BTN_A, !!(b8 & BIT(7))); | |
969 | input_event(input, EV_KEY, BTN_SELECT, !!(b9 & BIT(4))); | |
970 | input_event(input, EV_KEY, BTN_MODE, !!(b9 & BIT(5))); | |
971 | input_event(input, EV_KEY, BTN_START, !!(b9 & BIT(6))); | |
972 | input_event(input, EV_KEY, BTN_GEAR_DOWN, !!(b9 & BIT(7))); | |
973 | input_event(input, EV_KEY, BTN_GEAR_UP, !!(b10 & BIT(0))); | |
974 | input_event(input, EV_KEY, BTN_THUMBR, !!(b10 & BIT(2))); | |
975 | input_event(input, EV_KEY, BTN_THUMBL, !!(b10 & BIT(6))); | |
976 | input_event(input, EV_KEY, BTN_THUMB, lpad_touched || lpad_and_joy); | |
977 | input_event(input, EV_KEY, BTN_THUMB2, !!(b10 & BIT(4))); | |
978 | input_event(input, EV_KEY, BTN_DPAD_UP, !!(b9 & BIT(0))); | |
979 | input_event(input, EV_KEY, BTN_DPAD_RIGHT, !!(b9 & BIT(1))); | |
980 | input_event(input, EV_KEY, BTN_DPAD_LEFT, !!(b9 & BIT(2))); | |
981 | input_event(input, EV_KEY, BTN_DPAD_DOWN, !!(b9 & BIT(3))); | |
982 | ||
983 | input_sync(input); | |
984 | } | |
985 | ||
f8271979 RRC |
986 | /* |
987 | * The size for this message payload is 11. | |
988 | * The known values are: | |
989 | * Offset| Type | Meaning | |
990 | * -------+-------+--------------------------- | |
991 | * 4-7 | u32 | sequence number | |
992 | * 8-11 | -- | always 0 | |
993 | * 12-13 | u16 | voltage (mV) | |
994 | * 14 | u8 | battery percent | |
995 | */ | |
996 | static void steam_do_battery_event(struct steam_device *steam, | |
997 | struct power_supply *battery, u8 *data) | |
998 | { | |
999 | unsigned long flags; | |
1000 | ||
1001 | s16 volts = steam_le16(data + 12); | |
1002 | u8 batt = data[14]; | |
1003 | ||
1004 | /* Creating the battery may have failed */ | |
1005 | rcu_read_lock(); | |
1006 | battery = rcu_dereference(steam->battery); | |
1007 | if (likely(battery)) { | |
1008 | spin_lock_irqsave(&steam->lock, flags); | |
1009 | steam->voltage = volts; | |
1010 | steam->battery_charge = batt; | |
1011 | spin_unlock_irqrestore(&steam->lock, flags); | |
1012 | power_supply_changed(battery); | |
1013 | } | |
1014 | rcu_read_unlock(); | |
1015 | } | |
1016 | ||
c164d6ab RRC |
1017 | static int steam_raw_event(struct hid_device *hdev, |
1018 | struct hid_report *report, u8 *data, | |
1019 | int size) | |
1020 | { | |
1021 | struct steam_device *steam = hid_get_drvdata(hdev); | |
1022 | struct input_dev *input; | |
f8271979 | 1023 | struct power_supply *battery; |
c164d6ab RRC |
1024 | |
1025 | if (!steam) | |
1026 | return 0; | |
1027 | ||
1028 | if (steam->client_opened) | |
1029 | hid_input_report(steam->client_hdev, HID_FEATURE_REPORT, | |
1030 | data, size, 0); | |
1031 | /* | |
1032 | * All messages are size=64, all values little-endian. | |
1033 | * The format is: | |
1034 | * Offset| Meaning | |
1035 | * -------+-------------------------------------------- | |
1036 | * 0-1 | always 0x01, 0x00, maybe protocol version? | |
1037 | * 2 | type of message | |
1038 | * 3 | length of the real payload (not checked) | |
1039 | * 4-n | payload data, depends on the type | |
1040 | * | |
1041 | * There are these known types of message: | |
1042 | * 0x01: input data (60 bytes) | |
1043 | * 0x03: wireless connect/disconnect (1 byte) | |
1044 | * 0x04: battery status (11 bytes) | |
1045 | */ | |
1046 | ||
1047 | if (size != 64 || data[0] != 1 || data[1] != 0) | |
1048 | return 0; | |
1049 | ||
1050 | switch (data[2]) { | |
1051 | case STEAM_EV_INPUT_DATA: | |
1052 | if (steam->client_opened) | |
1053 | return 0; | |
1054 | rcu_read_lock(); | |
1055 | input = rcu_dereference(steam->input); | |
385a4886 | 1056 | if (likely(input)) |
c164d6ab | 1057 | steam_do_input_event(steam, input, data); |
c164d6ab RRC |
1058 | rcu_read_unlock(); |
1059 | break; | |
1060 | case STEAM_EV_CONNECT: | |
1061 | /* | |
1062 | * The payload of this event is a single byte: | |
1063 | * 0x01: disconnected. | |
1064 | * 0x02: connected. | |
1065 | */ | |
1066 | switch (data[4]) { | |
1067 | case 0x01: | |
1068 | steam_do_connect_event(steam, false); | |
1069 | break; | |
1070 | case 0x02: | |
1071 | steam_do_connect_event(steam, true); | |
1072 | break; | |
1073 | } | |
1074 | break; | |
1075 | case STEAM_EV_BATTERY: | |
f8271979 RRC |
1076 | if (steam->quirks & STEAM_QUIRK_WIRELESS) { |
1077 | rcu_read_lock(); | |
1078 | battery = rcu_dereference(steam->battery); | |
1079 | if (likely(battery)) { | |
1080 | steam_do_battery_event(steam, battery, data); | |
1081 | } else { | |
1082 | dbg_hid( | |
1083 | "%s: battery data without connect event\n", | |
1084 | __func__); | |
1085 | steam_do_connect_event(steam, true); | |
1086 | } | |
1087 | rcu_read_unlock(); | |
1088 | } | |
c164d6ab RRC |
1089 | break; |
1090 | } | |
1091 | return 0; | |
1092 | } | |
1093 | ||
1094 | static int steam_param_set_lizard_mode(const char *val, | |
1095 | const struct kernel_param *kp) | |
1096 | { | |
1097 | struct steam_device *steam; | |
1098 | int ret; | |
1099 | ||
1100 | ret = param_set_bool(val, kp); | |
1101 | if (ret) | |
1102 | return ret; | |
1103 | ||
1104 | mutex_lock(&steam_devices_lock); | |
1105 | list_for_each_entry(steam, &steam_devices, list) { | |
385a4886 RRC |
1106 | mutex_lock(&steam->mutex); |
1107 | if (!steam->client_opened) | |
1108 | steam_set_lizard_mode(steam, lizard_mode); | |
1109 | mutex_unlock(&steam->mutex); | |
c164d6ab RRC |
1110 | } |
1111 | mutex_unlock(&steam_devices_lock); | |
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | static const struct kernel_param_ops steam_lizard_mode_ops = { | |
1116 | .set = steam_param_set_lizard_mode, | |
1117 | .get = param_get_bool, | |
1118 | }; | |
1119 | ||
1120 | module_param_cb(lizard_mode, &steam_lizard_mode_ops, &lizard_mode, 0644); | |
1121 | MODULE_PARM_DESC(lizard_mode, | |
1122 | "Enable mouse and keyboard emulation (lizard mode) when the gamepad is not in use"); | |
1123 | ||
1124 | static const struct hid_device_id steam_controllers[] = { | |
1125 | { /* Wired Steam Controller */ | |
1126 | HID_USB_DEVICE(USB_VENDOR_ID_VALVE, | |
1127 | USB_DEVICE_ID_STEAM_CONTROLLER) | |
1128 | }, | |
1129 | { /* Wireless Steam Controller */ | |
1130 | HID_USB_DEVICE(USB_VENDOR_ID_VALVE, | |
1131 | USB_DEVICE_ID_STEAM_CONTROLLER_WIRELESS), | |
1132 | .driver_data = STEAM_QUIRK_WIRELESS | |
1133 | }, | |
1134 | {} | |
1135 | }; | |
1136 | ||
1137 | MODULE_DEVICE_TABLE(hid, steam_controllers); | |
1138 | ||
1139 | static struct hid_driver steam_controller_driver = { | |
1140 | .name = "hid-steam", | |
1141 | .id_table = steam_controllers, | |
1142 | .probe = steam_probe, | |
1143 | .remove = steam_remove, | |
1144 | .raw_event = steam_raw_event, | |
1145 | }; | |
1146 | ||
1147 | module_hid_driver(steam_controller_driver); |