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x86/build: convert function graph '-Os' error to warning
[linux/fpc-iii.git] / drivers / hid / hid-logitech-hidpp.c
blob2e2515a4c070eac305a834c9229d0e1fa27f722f
1 /*
2 * HIDPP protocol for Logitech Unifying receivers
3 *
4 * Copyright (c) 2011 Logitech (c)
5 * Copyright (c) 2012-2013 Google (c)
6 * Copyright (c) 2013-2014 Red Hat Inc.
7 */
8
9 /*
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; version 2 of the License.
13 */
14
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17 #include <linux/device.h>
18 #include <linux/input.h>
19 #include <linux/usb.h>
20 #include <linux/hid.h>
21 #include <linux/module.h>
22 #include <linux/slab.h>
23 #include <linux/sched.h>
24 #include <linux/kfifo.h>
25 #include <linux/input/mt.h>
26 #include <linux/workqueue.h>
27 #include <linux/atomic.h>
28 #include <linux/fixp-arith.h>
29 #include <asm/unaligned.h>
30 #include "usbhid/usbhid.h"
31 #include "hid-ids.h"
32
33 MODULE_LICENSE("GPL");
34 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
35 MODULE_AUTHOR("Nestor Lopez Casado <nlopezcasad@logitech.com>");
36
37 static bool disable_raw_mode;
38 module_param(disable_raw_mode, bool, 0644);
39 MODULE_PARM_DESC(disable_raw_mode,
40 "Disable Raw mode reporting for touchpads and keep firmware gestures.");
41
42 static bool disable_tap_to_click;
43 module_param(disable_tap_to_click, bool, 0644);
44 MODULE_PARM_DESC(disable_tap_to_click,
45 "Disable Tap-To-Click mode reporting for touchpads (only on the K400 currently).");
46
47 #define REPORT_ID_HIDPP_SHORT 0x10
48 #define REPORT_ID_HIDPP_LONG 0x11
49 #define REPORT_ID_HIDPP_VERY_LONG 0x12
50
51 #define HIDPP_REPORT_SHORT_LENGTH 7
52 #define HIDPP_REPORT_LONG_LENGTH 20
53 #define HIDPP_REPORT_VERY_LONG_LENGTH 64
54
55 #define HIDPP_QUIRK_CLASS_WTP BIT(0)
56 #define HIDPP_QUIRK_CLASS_M560 BIT(1)
57 #define HIDPP_QUIRK_CLASS_K400 BIT(2)
58 #define HIDPP_QUIRK_CLASS_G920 BIT(3)
59
60 /* bits 2..20 are reserved for classes */
61 #define HIDPP_QUIRK_CONNECT_EVENTS BIT(21)
62 #define HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS BIT(22)
63 #define HIDPP_QUIRK_NO_HIDINPUT BIT(23)
64 #define HIDPP_QUIRK_FORCE_OUTPUT_REPORTS BIT(24)
65
66 #define HIDPP_QUIRK_DELAYED_INIT (HIDPP_QUIRK_NO_HIDINPUT | \
67 HIDPP_QUIRK_CONNECT_EVENTS)
68
69 /*
70 * There are two hidpp protocols in use, the first version hidpp10 is known
71 * as register access protocol or RAP, the second version hidpp20 is known as
72 * feature access protocol or FAP
73 *
74 * Most older devices (including the Unifying usb receiver) use the RAP protocol
75 * where as most newer devices use the FAP protocol. Both protocols are
76 * compatible with the underlying transport, which could be usb, Unifiying, or
77 * bluetooth. The message lengths are defined by the hid vendor specific report
78 * descriptor for the HIDPP_SHORT report type (total message lenth 7 bytes) and
79 * the HIDPP_LONG report type (total message length 20 bytes)
80 *
81 * The RAP protocol uses both report types, whereas the FAP only uses HIDPP_LONG
82 * messages. The Unifying receiver itself responds to RAP messages (device index
83 * is 0xFF for the receiver), and all messages (short or long) with a device
84 * index between 1 and 6 are passed untouched to the corresponding paired
85 * Unifying device.
86 *
87 * The paired device can be RAP or FAP, it will receive the message untouched
88 * from the Unifiying receiver.
89 */
90
91 struct fap {
92 u8 feature_index;
93 u8 funcindex_clientid;
94 u8 params[HIDPP_REPORT_VERY_LONG_LENGTH - 4U];
95 };
96
97 struct rap {
98 u8 sub_id;
99 u8 reg_address;
100 u8 params[HIDPP_REPORT_VERY_LONG_LENGTH - 4U];
101 };
102
103 struct hidpp_report {
104 u8 report_id;
105 u8 device_index;
106 union {
107 struct fap fap;
108 struct rap rap;
109 u8 rawbytes[sizeof(struct fap)];
110 };
111 } __packed;
112
113 struct hidpp_device {
114 struct hid_device *hid_dev;
115 struct mutex send_mutex;
116 void *send_receive_buf;
117 char *name; /* will never be NULL and should not be freed */
118 wait_queue_head_t wait;
119 bool answer_available;
120 u8 protocol_major;
121 u8 protocol_minor;
122
123 void *private_data;
124
125 struct work_struct work;
126 struct kfifo delayed_work_fifo;
127 atomic_t connected;
128 struct input_dev *delayed_input;
129
130 unsigned long quirks;
131 };
132
133
134 /* HID++ 1.0 error codes */
135 #define HIDPP_ERROR 0x8f
136 #define HIDPP_ERROR_SUCCESS 0x00
137 #define HIDPP_ERROR_INVALID_SUBID 0x01
138 #define HIDPP_ERROR_INVALID_ADRESS 0x02
139 #define HIDPP_ERROR_INVALID_VALUE 0x03
140 #define HIDPP_ERROR_CONNECT_FAIL 0x04
141 #define HIDPP_ERROR_TOO_MANY_DEVICES 0x05
142 #define HIDPP_ERROR_ALREADY_EXISTS 0x06
143 #define HIDPP_ERROR_BUSY 0x07
144 #define HIDPP_ERROR_UNKNOWN_DEVICE 0x08
145 #define HIDPP_ERROR_RESOURCE_ERROR 0x09
146 #define HIDPP_ERROR_REQUEST_UNAVAILABLE 0x0a
147 #define HIDPP_ERROR_INVALID_PARAM_VALUE 0x0b
148 #define HIDPP_ERROR_WRONG_PIN_CODE 0x0c
149 /* HID++ 2.0 error codes */
150 #define HIDPP20_ERROR 0xff
151
152 static void hidpp_connect_event(struct hidpp_device *hidpp_dev);
153
154 static int __hidpp_send_report(struct hid_device *hdev,
155 struct hidpp_report *hidpp_report)
156 {
157 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
158 int fields_count, ret;
159
160 hidpp = hid_get_drvdata(hdev);
161
162 switch (hidpp_report->report_id) {
163 case REPORT_ID_HIDPP_SHORT:
164 fields_count = HIDPP_REPORT_SHORT_LENGTH;
165 break;
166 case REPORT_ID_HIDPP_LONG:
167 fields_count = HIDPP_REPORT_LONG_LENGTH;
168 break;
169 case REPORT_ID_HIDPP_VERY_LONG:
170 fields_count = HIDPP_REPORT_VERY_LONG_LENGTH;
171 break;
172 default:
173 return -ENODEV;
174 }
175
176 /*
177 * set the device_index as the receiver, it will be overwritten by
178 * hid_hw_request if needed
179 */
180 hidpp_report->device_index = 0xff;
181
182 if (hidpp->quirks & HIDPP_QUIRK_FORCE_OUTPUT_REPORTS) {
183 ret = hid_hw_output_report(hdev, (u8 *)hidpp_report, fields_count);
184 } else {
185 ret = hid_hw_raw_request(hdev, hidpp_report->report_id,
186 (u8 *)hidpp_report, fields_count, HID_OUTPUT_REPORT,
187 HID_REQ_SET_REPORT);
188 }
189
190 return ret == fields_count ? 0 : -1;
191 }
192
193 /**
194 * hidpp_send_message_sync() returns 0 in case of success, and something else
195 * in case of a failure.
196 * - If ' something else' is positive, that means that an error has been raised
197 * by the protocol itself.
198 * - If ' something else' is negative, that means that we had a classic error
199 * (-ENOMEM, -EPIPE, etc...)
200 */
201 static int hidpp_send_message_sync(struct hidpp_device *hidpp,
202 struct hidpp_report *message,
203 struct hidpp_report *response)
204 {
205 int ret;
206
207 mutex_lock(&hidpp->send_mutex);
208
209 hidpp->send_receive_buf = response;
210 hidpp->answer_available = false;
211
212 /*
213 * So that we can later validate the answer when it arrives
214 * in hidpp_raw_event
215 */
216 *response = *message;
217
218 ret = __hidpp_send_report(hidpp->hid_dev, message);
219
220 if (ret) {
221 dbg_hid("__hidpp_send_report returned err: %d\n", ret);
222 memset(response, 0, sizeof(struct hidpp_report));
223 goto exit;
224 }
225
226 if (!wait_event_timeout(hidpp->wait, hidpp->answer_available,
227 5*HZ)) {
228 dbg_hid("%s:timeout waiting for response\n", __func__);
229 memset(response, 0, sizeof(struct hidpp_report));
230 ret = -ETIMEDOUT;
231 }
232
233 if (response->report_id == REPORT_ID_HIDPP_SHORT &&
234 response->rap.sub_id == HIDPP_ERROR) {
235 ret = response->rap.params[1];
236 dbg_hid("%s:got hidpp error %02X\n", __func__, ret);
237 goto exit;
238 }
239
240 if ((response->report_id == REPORT_ID_HIDPP_LONG ||
241 response->report_id == REPORT_ID_HIDPP_VERY_LONG) &&
242 response->fap.feature_index == HIDPP20_ERROR) {
243 ret = response->fap.params[1];
244 dbg_hid("%s:got hidpp 2.0 error %02X\n", __func__, ret);
245 goto exit;
246 }
247
248 exit:
249 mutex_unlock(&hidpp->send_mutex);
250 return ret;
251
252 }
253
254 static int hidpp_send_fap_command_sync(struct hidpp_device *hidpp,
255 u8 feat_index, u8 funcindex_clientid, u8 *params, int param_count,
256 struct hidpp_report *response)
257 {
258 struct hidpp_report *message;
259 int ret;
260
261 if (param_count > sizeof(message->fap.params))
262 return -EINVAL;
263
264 message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
265 if (!message)
266 return -ENOMEM;
267
268 if (param_count > (HIDPP_REPORT_LONG_LENGTH - 4))
269 message->report_id = REPORT_ID_HIDPP_VERY_LONG;
270 else
271 message->report_id = REPORT_ID_HIDPP_LONG;
272 message->fap.feature_index = feat_index;
273 message->fap.funcindex_clientid = funcindex_clientid;
274 memcpy(&message->fap.params, params, param_count);
275
276 ret = hidpp_send_message_sync(hidpp, message, response);
277 kfree(message);
278 return ret;
279 }
280
281 static int hidpp_send_rap_command_sync(struct hidpp_device *hidpp_dev,
282 u8 report_id, u8 sub_id, u8 reg_address, u8 *params, int param_count,
283 struct hidpp_report *response)
284 {
285 struct hidpp_report *message;
286 int ret, max_count;
287
288 switch (report_id) {
289 case REPORT_ID_HIDPP_SHORT:
290 max_count = HIDPP_REPORT_SHORT_LENGTH - 4;
291 break;
292 case REPORT_ID_HIDPP_LONG:
293 max_count = HIDPP_REPORT_LONG_LENGTH - 4;
294 break;
295 case REPORT_ID_HIDPP_VERY_LONG:
296 max_count = HIDPP_REPORT_VERY_LONG_LENGTH - 4;
297 break;
298 default:
299 return -EINVAL;
300 }
301
302 if (param_count > max_count)
303 return -EINVAL;
304
305 message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
306 if (!message)
307 return -ENOMEM;
308 message->report_id = report_id;
309 message->rap.sub_id = sub_id;
310 message->rap.reg_address = reg_address;
311 memcpy(&message->rap.params, params, param_count);
312
313 ret = hidpp_send_message_sync(hidpp_dev, message, response);
314 kfree(message);
315 return ret;
316 }
317
318 static void delayed_work_cb(struct work_struct *work)
319 {
320 struct hidpp_device *hidpp = container_of(work, struct hidpp_device,
321 work);
322 hidpp_connect_event(hidpp);
323 }
324
325 static inline bool hidpp_match_answer(struct hidpp_report *question,
326 struct hidpp_report *answer)
327 {
328 return (answer->fap.feature_index == question->fap.feature_index) &&
329 (answer->fap.funcindex_clientid == question->fap.funcindex_clientid);
330 }
331
332 static inline bool hidpp_match_error(struct hidpp_report *question,
333 struct hidpp_report *answer)
334 {
335 return ((answer->rap.sub_id == HIDPP_ERROR) ||
336 (answer->fap.feature_index == HIDPP20_ERROR)) &&
337 (answer->fap.funcindex_clientid == question->fap.feature_index) &&
338 (answer->fap.params[0] == question->fap.funcindex_clientid);
339 }
340
341 static inline bool hidpp_report_is_connect_event(struct hidpp_report *report)
342 {
343 return (report->report_id == REPORT_ID_HIDPP_SHORT) &&
344 (report->rap.sub_id == 0x41);
345 }
346
347 /**
348 * hidpp_prefix_name() prefixes the current given name with "Logitech ".
349 */
350 static void hidpp_prefix_name(char **name, int name_length)
351 {
352 #define PREFIX_LENGTH 9 /* "Logitech " */
353
354 int new_length;
355 char *new_name;
356
357 if (name_length > PREFIX_LENGTH &&
358 strncmp(*name, "Logitech ", PREFIX_LENGTH) == 0)
359 /* The prefix has is already in the name */
360 return;
361
362 new_length = PREFIX_LENGTH + name_length;
363 new_name = kzalloc(new_length, GFP_KERNEL);
364 if (!new_name)
365 return;
366
367 snprintf(new_name, new_length, "Logitech %s", *name);
368
369 kfree(*name);
370
371 *name = new_name;
372 }
373
374 /* -------------------------------------------------------------------------- */
375 /* HIDP++ 1.0 commands */
376 /* -------------------------------------------------------------------------- */
377
378 #define HIDPP_SET_REGISTER 0x80
379 #define HIDPP_GET_REGISTER 0x81
380 #define HIDPP_SET_LONG_REGISTER 0x82
381 #define HIDPP_GET_LONG_REGISTER 0x83
382
383 #define HIDPP_REG_PAIRING_INFORMATION 0xB5
384 #define DEVICE_NAME 0x40
385
386 static char *hidpp_get_unifying_name(struct hidpp_device *hidpp_dev)
387 {
388 struct hidpp_report response;
389 int ret;
390 /* hid-logitech-dj is in charge of setting the right device index */
391 u8 params[1] = { DEVICE_NAME };
392 char *name;
393 int len;
394
395 ret = hidpp_send_rap_command_sync(hidpp_dev,
396 REPORT_ID_HIDPP_SHORT,
397 HIDPP_GET_LONG_REGISTER,
398 HIDPP_REG_PAIRING_INFORMATION,
399 params, 1, &response);
400 if (ret)
401 return NULL;
402
403 len = response.rap.params[1];
404
405 if (2 + len > sizeof(response.rap.params))
406 return NULL;
407
408 name = kzalloc(len + 1, GFP_KERNEL);
409 if (!name)
410 return NULL;
411
412 memcpy(name, &response.rap.params[2], len);
413
414 /* include the terminating '\0' */
415 hidpp_prefix_name(&name, len + 1);
416
417 return name;
418 }
419
420 /* -------------------------------------------------------------------------- */
421 /* 0x0000: Root */
422 /* -------------------------------------------------------------------------- */
423
424 #define HIDPP_PAGE_ROOT 0x0000
425 #define HIDPP_PAGE_ROOT_IDX 0x00
426
427 #define CMD_ROOT_GET_FEATURE 0x01
428 #define CMD_ROOT_GET_PROTOCOL_VERSION 0x11
429
430 static int hidpp_root_get_feature(struct hidpp_device *hidpp, u16 feature,
431 u8 *feature_index, u8 *feature_type)
432 {
433 struct hidpp_report response;
434 int ret;
435 u8 params[2] = { feature >> 8, feature & 0x00FF };
436
437 ret = hidpp_send_fap_command_sync(hidpp,
438 HIDPP_PAGE_ROOT_IDX,
439 CMD_ROOT_GET_FEATURE,
440 params, 2, &response);
441 if (ret)
442 return ret;
443
444 *feature_index = response.fap.params[0];
445 *feature_type = response.fap.params[1];
446
447 return ret;
448 }
449
450 static int hidpp_root_get_protocol_version(struct hidpp_device *hidpp)
451 {
452 struct hidpp_report response;
453 int ret;
454
455 ret = hidpp_send_fap_command_sync(hidpp,
456 HIDPP_PAGE_ROOT_IDX,
457 CMD_ROOT_GET_PROTOCOL_VERSION,
458 NULL, 0, &response);
459
460 if (ret == HIDPP_ERROR_INVALID_SUBID) {
461 hidpp->protocol_major = 1;
462 hidpp->protocol_minor = 0;
463 return 0;
464 }
465
466 /* the device might not be connected */
467 if (ret == HIDPP_ERROR_RESOURCE_ERROR)
468 return -EIO;
469
470 if (ret > 0) {
471 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
472 __func__, ret);
473 return -EPROTO;
474 }
475 if (ret)
476 return ret;
477
478 hidpp->protocol_major = response.fap.params[0];
479 hidpp->protocol_minor = response.fap.params[1];
480
481 return ret;
482 }
483
484 static bool hidpp_is_connected(struct hidpp_device *hidpp)
485 {
486 int ret;
487
488 ret = hidpp_root_get_protocol_version(hidpp);
489 if (!ret)
490 hid_dbg(hidpp->hid_dev, "HID++ %u.%u device connected.\n",
491 hidpp->protocol_major, hidpp->protocol_minor);
492 return ret == 0;
493 }
494
495 /* -------------------------------------------------------------------------- */
496 /* 0x0005: GetDeviceNameType */
497 /* -------------------------------------------------------------------------- */
498
499 #define HIDPP_PAGE_GET_DEVICE_NAME_TYPE 0x0005
500
501 #define CMD_GET_DEVICE_NAME_TYPE_GET_COUNT 0x01
502 #define CMD_GET_DEVICE_NAME_TYPE_GET_DEVICE_NAME 0x11
503 #define CMD_GET_DEVICE_NAME_TYPE_GET_TYPE 0x21
504
505 static int hidpp_devicenametype_get_count(struct hidpp_device *hidpp,
506 u8 feature_index, u8 *nameLength)
507 {
508 struct hidpp_report response;
509 int ret;
510
511 ret = hidpp_send_fap_command_sync(hidpp, feature_index,
512 CMD_GET_DEVICE_NAME_TYPE_GET_COUNT, NULL, 0, &response);
513
514 if (ret > 0) {
515 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
516 __func__, ret);
517 return -EPROTO;
518 }
519 if (ret)
520 return ret;
521
522 *nameLength = response.fap.params[0];
523
524 return ret;
525 }
526
527 static int hidpp_devicenametype_get_device_name(struct hidpp_device *hidpp,
528 u8 feature_index, u8 char_index, char *device_name, int len_buf)
529 {
530 struct hidpp_report response;
531 int ret, i;
532 int count;
533
534 ret = hidpp_send_fap_command_sync(hidpp, feature_index,
535 CMD_GET_DEVICE_NAME_TYPE_GET_DEVICE_NAME, &char_index, 1,
536 &response);
537
538 if (ret > 0) {
539 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
540 __func__, ret);
541 return -EPROTO;
542 }
543 if (ret)
544 return ret;
545
546 switch (response.report_id) {
547 case REPORT_ID_HIDPP_VERY_LONG:
548 count = HIDPP_REPORT_VERY_LONG_LENGTH - 4;
549 break;
550 case REPORT_ID_HIDPP_LONG:
551 count = HIDPP_REPORT_LONG_LENGTH - 4;
552 break;
553 case REPORT_ID_HIDPP_SHORT:
554 count = HIDPP_REPORT_SHORT_LENGTH - 4;
555 break;
556 default:
557 return -EPROTO;
558 }
559
560 if (len_buf < count)
561 count = len_buf;
562
563 for (i = 0; i < count; i++)
564 device_name[i] = response.fap.params[i];
565
566 return count;
567 }
568
569 static char *hidpp_get_device_name(struct hidpp_device *hidpp)
570 {
571 u8 feature_type;
572 u8 feature_index;
573 u8 __name_length;
574 char *name;
575 unsigned index = 0;
576 int ret;
577
578 ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_GET_DEVICE_NAME_TYPE,
579 &feature_index, &feature_type);
580 if (ret)
581 return NULL;
582
583 ret = hidpp_devicenametype_get_count(hidpp, feature_index,
584 &__name_length);
585 if (ret)
586 return NULL;
587
588 name = kzalloc(__name_length + 1, GFP_KERNEL);
589 if (!name)
590 return NULL;
591
592 while (index < __name_length) {
593 ret = hidpp_devicenametype_get_device_name(hidpp,
594 feature_index, index, name + index,
595 __name_length - index);
596 if (ret <= 0) {
597 kfree(name);
598 return NULL;
599 }
600 index += ret;
601 }
602
603 /* include the terminating '\0' */
604 hidpp_prefix_name(&name, __name_length + 1);
605
606 return name;
607 }
608
609 /* -------------------------------------------------------------------------- */
610 /* 0x6010: Touchpad FW items */
611 /* -------------------------------------------------------------------------- */
612
613 #define HIDPP_PAGE_TOUCHPAD_FW_ITEMS 0x6010
614
615 #define CMD_TOUCHPAD_FW_ITEMS_SET 0x10
616
617 struct hidpp_touchpad_fw_items {
618 uint8_t presence;
619 uint8_t desired_state;
620 uint8_t state;
621 uint8_t persistent;
622 };
623
624 /**
625 * send a set state command to the device by reading the current items->state
626 * field. items is then filled with the current state.
627 */
628 static int hidpp_touchpad_fw_items_set(struct hidpp_device *hidpp,
629 u8 feature_index,
630 struct hidpp_touchpad_fw_items *items)
631 {
632 struct hidpp_report response;
633 int ret;
634 u8 *params = (u8 *)response.fap.params;
635
636 ret = hidpp_send_fap_command_sync(hidpp, feature_index,
637 CMD_TOUCHPAD_FW_ITEMS_SET, &items->state, 1, &response);
638
639 if (ret > 0) {
640 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
641 __func__, ret);
642 return -EPROTO;
643 }
644 if (ret)
645 return ret;
646
647 items->presence = params[0];
648 items->desired_state = params[1];
649 items->state = params[2];
650 items->persistent = params[3];
651
652 return 0;
653 }
654
655 /* -------------------------------------------------------------------------- */
656 /* 0x6100: TouchPadRawXY */
657 /* -------------------------------------------------------------------------- */
658
659 #define HIDPP_PAGE_TOUCHPAD_RAW_XY 0x6100
660
661 #define CMD_TOUCHPAD_GET_RAW_INFO 0x01
662 #define CMD_TOUCHPAD_SET_RAW_REPORT_STATE 0x21
663
664 #define EVENT_TOUCHPAD_RAW_XY 0x00
665
666 #define TOUCHPAD_RAW_XY_ORIGIN_LOWER_LEFT 0x01
667 #define TOUCHPAD_RAW_XY_ORIGIN_UPPER_LEFT 0x03
668
669 struct hidpp_touchpad_raw_info {
670 u16 x_size;
671 u16 y_size;
672 u8 z_range;
673 u8 area_range;
674 u8 timestamp_unit;
675 u8 maxcontacts;
676 u8 origin;
677 u16 res;
678 };
679
680 struct hidpp_touchpad_raw_xy_finger {
681 u8 contact_type;
682 u8 contact_status;
683 u16 x;
684 u16 y;
685 u8 z;
686 u8 area;
687 u8 finger_id;
688 };
689
690 struct hidpp_touchpad_raw_xy {
691 u16 timestamp;
692 struct hidpp_touchpad_raw_xy_finger fingers[2];
693 u8 spurious_flag;
694 u8 end_of_frame;
695 u8 finger_count;
696 u8 button;
697 };
698
699 static int hidpp_touchpad_get_raw_info(struct hidpp_device *hidpp,
700 u8 feature_index, struct hidpp_touchpad_raw_info *raw_info)
701 {
702 struct hidpp_report response;
703 int ret;
704 u8 *params = (u8 *)response.fap.params;
705
706 ret = hidpp_send_fap_command_sync(hidpp, feature_index,
707 CMD_TOUCHPAD_GET_RAW_INFO, NULL, 0, &response);
708
709 if (ret > 0) {
710 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
711 __func__, ret);
712 return -EPROTO;
713 }
714 if (ret)
715 return ret;
716
717 raw_info->x_size = get_unaligned_be16(&params[0]);
718 raw_info->y_size = get_unaligned_be16(&params[2]);
719 raw_info->z_range = params[4];
720 raw_info->area_range = params[5];
721 raw_info->maxcontacts = params[7];
722 raw_info->origin = params[8];
723 /* res is given in unit per inch */
724 raw_info->res = get_unaligned_be16(&params[13]) * 2 / 51;
725
726 return ret;
727 }
728
729 static int hidpp_touchpad_set_raw_report_state(struct hidpp_device *hidpp_dev,
730 u8 feature_index, bool send_raw_reports,
731 bool sensor_enhanced_settings)
732 {
733 struct hidpp_report response;
734
735 /*
736 * Params:
737 * bit 0 - enable raw
738 * bit 1 - 16bit Z, no area
739 * bit 2 - enhanced sensitivity
740 * bit 3 - width, height (4 bits each) instead of area
741 * bit 4 - send raw + gestures (degrades smoothness)
742 * remaining bits - reserved
743 */
744 u8 params = send_raw_reports | (sensor_enhanced_settings << 2);
745
746 return hidpp_send_fap_command_sync(hidpp_dev, feature_index,
747 CMD_TOUCHPAD_SET_RAW_REPORT_STATE, &params, 1, &response);
748 }
749
750 static void hidpp_touchpad_touch_event(u8 *data,
751 struct hidpp_touchpad_raw_xy_finger *finger)
752 {
753 u8 x_m = data[0] << 2;
754 u8 y_m = data[2] << 2;
755
756 finger->x = x_m << 6 | data[1];
757 finger->y = y_m << 6 | data[3];
758
759 finger->contact_type = data[0] >> 6;
760 finger->contact_status = data[2] >> 6;
761
762 finger->z = data[4];
763 finger->area = data[5];
764 finger->finger_id = data[6] >> 4;
765 }
766
767 static void hidpp_touchpad_raw_xy_event(struct hidpp_device *hidpp_dev,
768 u8 *data, struct hidpp_touchpad_raw_xy *raw_xy)
769 {
770 memset(raw_xy, 0, sizeof(struct hidpp_touchpad_raw_xy));
771 raw_xy->end_of_frame = data[8] & 0x01;
772 raw_xy->spurious_flag = (data[8] >> 1) & 0x01;
773 raw_xy->finger_count = data[15] & 0x0f;
774 raw_xy->button = (data[8] >> 2) & 0x01;
775
776 if (raw_xy->finger_count) {
777 hidpp_touchpad_touch_event(&data[2], &raw_xy->fingers[0]);
778 hidpp_touchpad_touch_event(&data[9], &raw_xy->fingers[1]);
779 }
780 }
781
782 /* -------------------------------------------------------------------------- */
783 /* 0x8123: Force feedback support */
784 /* -------------------------------------------------------------------------- */
785
786 #define HIDPP_FF_GET_INFO 0x01
787 #define HIDPP_FF_RESET_ALL 0x11
788 #define HIDPP_FF_DOWNLOAD_EFFECT 0x21
789 #define HIDPP_FF_SET_EFFECT_STATE 0x31
790 #define HIDPP_FF_DESTROY_EFFECT 0x41
791 #define HIDPP_FF_GET_APERTURE 0x51
792 #define HIDPP_FF_SET_APERTURE 0x61
793 #define HIDPP_FF_GET_GLOBAL_GAINS 0x71
794 #define HIDPP_FF_SET_GLOBAL_GAINS 0x81
795
796 #define HIDPP_FF_EFFECT_STATE_GET 0x00
797 #define HIDPP_FF_EFFECT_STATE_STOP 0x01
798 #define HIDPP_FF_EFFECT_STATE_PLAY 0x02
799 #define HIDPP_FF_EFFECT_STATE_PAUSE 0x03
800
801 #define HIDPP_FF_EFFECT_CONSTANT 0x00
802 #define HIDPP_FF_EFFECT_PERIODIC_SINE 0x01
803 #define HIDPP_FF_EFFECT_PERIODIC_SQUARE 0x02
804 #define HIDPP_FF_EFFECT_PERIODIC_TRIANGLE 0x03
805 #define HIDPP_FF_EFFECT_PERIODIC_SAWTOOTHUP 0x04
806 #define HIDPP_FF_EFFECT_PERIODIC_SAWTOOTHDOWN 0x05
807 #define HIDPP_FF_EFFECT_SPRING 0x06
808 #define HIDPP_FF_EFFECT_DAMPER 0x07
809 #define HIDPP_FF_EFFECT_FRICTION 0x08
810 #define HIDPP_FF_EFFECT_INERTIA 0x09
811 #define HIDPP_FF_EFFECT_RAMP 0x0A
812
813 #define HIDPP_FF_EFFECT_AUTOSTART 0x80
814
815 #define HIDPP_FF_EFFECTID_NONE -1
816 #define HIDPP_FF_EFFECTID_AUTOCENTER -2
817
818 #define HIDPP_FF_MAX_PARAMS 20
819 #define HIDPP_FF_RESERVED_SLOTS 1
820
821 struct hidpp_ff_private_data {
822 struct hidpp_device *hidpp;
823 u8 feature_index;
824 u8 version;
825 u16 gain;
826 s16 range;
827 u8 slot_autocenter;
828 u8 num_effects;
829 int *effect_ids;
830 struct workqueue_struct *wq;
831 atomic_t workqueue_size;
832 };
833
834 struct hidpp_ff_work_data {
835 struct work_struct work;
836 struct hidpp_ff_private_data *data;
837 int effect_id;
838 u8 command;
839 u8 params[HIDPP_FF_MAX_PARAMS];
840 u8 size;
841 };
842
843 static const signed short hiddpp_ff_effects[] = {
844 FF_CONSTANT,
845 FF_PERIODIC,
846 FF_SINE,
847 FF_SQUARE,
848 FF_SAW_UP,
849 FF_SAW_DOWN,
850 FF_TRIANGLE,
851 FF_SPRING,
852 FF_DAMPER,
853 FF_AUTOCENTER,
854 FF_GAIN,
855 -1
856 };
857
858 static const signed short hiddpp_ff_effects_v2[] = {
859 FF_RAMP,
860 FF_FRICTION,
861 FF_INERTIA,
862 -1
863 };
864
865 static const u8 HIDPP_FF_CONDITION_CMDS[] = {
866 HIDPP_FF_EFFECT_SPRING,
867 HIDPP_FF_EFFECT_FRICTION,
868 HIDPP_FF_EFFECT_DAMPER,
869 HIDPP_FF_EFFECT_INERTIA
870 };
871
872 static const char *HIDPP_FF_CONDITION_NAMES[] = {
873 "spring",
874 "friction",
875 "damper",
876 "inertia"
877 };
878
879
880 static u8 hidpp_ff_find_effect(struct hidpp_ff_private_data *data, int effect_id)
881 {
882 int i;
883
884 for (i = 0; i < data->num_effects; i++)
885 if (data->effect_ids[i] == effect_id)
886 return i+1;
887
888 return 0;
889 }
890
891 static void hidpp_ff_work_handler(struct work_struct *w)
892 {
893 struct hidpp_ff_work_data *wd = container_of(w, struct hidpp_ff_work_data, work);
894 struct hidpp_ff_private_data *data = wd->data;
895 struct hidpp_report response;
896 u8 slot;
897 int ret;
898
899 /* add slot number if needed */
900 switch (wd->effect_id) {
901 case HIDPP_FF_EFFECTID_AUTOCENTER:
902 wd->params[0] = data->slot_autocenter;
903 break;
904 case HIDPP_FF_EFFECTID_NONE:
905 /* leave slot as zero */
906 break;
907 default:
908 /* find current slot for effect */
909 wd->params[0] = hidpp_ff_find_effect(data, wd->effect_id);
910 break;
911 }
912
913 /* send command and wait for reply */
914 ret = hidpp_send_fap_command_sync(data->hidpp, data->feature_index,
915 wd->command, wd->params, wd->size, &response);
916
917 if (ret) {
918 hid_err(data->hidpp->hid_dev, "Failed to send command to device!\n");
919 goto out;
920 }
921
922 /* parse return data */
923 switch (wd->command) {
924 case HIDPP_FF_DOWNLOAD_EFFECT:
925 slot = response.fap.params[0];
926 if (slot > 0 && slot <= data->num_effects) {
927 if (wd->effect_id >= 0)
928 /* regular effect uploaded */
929 data->effect_ids[slot-1] = wd->effect_id;
930 else if (wd->effect_id >= HIDPP_FF_EFFECTID_AUTOCENTER)
931 /* autocenter spring uploaded */
932 data->slot_autocenter = slot;
933 }
934 break;
935 case HIDPP_FF_DESTROY_EFFECT:
936 if (wd->effect_id >= 0)
937 /* regular effect destroyed */
938 data->effect_ids[wd->params[0]-1] = -1;
939 else if (wd->effect_id >= HIDPP_FF_EFFECTID_AUTOCENTER)
940 /* autocenter spring destoyed */
941 data->slot_autocenter = 0;
942 break;
943 case HIDPP_FF_SET_GLOBAL_GAINS:
944 data->gain = (wd->params[0] << 8) + wd->params[1];
945 break;
946 case HIDPP_FF_SET_APERTURE:
947 data->range = (wd->params[0] << 8) + wd->params[1];
948 break;
949 default:
950 /* no action needed */
951 break;
952 }
953
954 out:
955 atomic_dec(&data->workqueue_size);
956 kfree(wd);
957 }
958
959 static int hidpp_ff_queue_work(struct hidpp_ff_private_data *data, int effect_id, u8 command, u8 *params, u8 size)
960 {
961 struct hidpp_ff_work_data *wd = kzalloc(sizeof(*wd), GFP_KERNEL);
962 int s;
963
964 if (!wd)
965 return -ENOMEM;
966
967 INIT_WORK(&wd->work, hidpp_ff_work_handler);
968
969 wd->data = data;
970 wd->effect_id = effect_id;
971 wd->command = command;
972 wd->size = size;
973 memcpy(wd->params, params, size);
974
975 atomic_inc(&data->workqueue_size);
976 queue_work(data->wq, &wd->work);
977
978 /* warn about excessive queue size */
979 s = atomic_read(&data->workqueue_size);
980 if (s >= 20 && s % 20 == 0)
981 hid_warn(data->hidpp->hid_dev, "Force feedback command queue contains %d commands, causing substantial delays!", s);
982
983 return 0;
984 }
985
986 static int hidpp_ff_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old)
987 {
988 struct hidpp_ff_private_data *data = dev->ff->private;
989 u8 params[20];
990 u8 size;
991 int force;
992
993 /* set common parameters */
994 params[2] = effect->replay.length >> 8;
995 params[3] = effect->replay.length & 255;
996 params[4] = effect->replay.delay >> 8;
997 params[5] = effect->replay.delay & 255;
998
999 switch (effect->type) {
1000 case FF_CONSTANT:
1001 force = (effect->u.constant.level * fixp_sin16((effect->direction * 360) >> 16)) >> 15;
1002 params[1] = HIDPP_FF_EFFECT_CONSTANT;
1003 params[6] = force >> 8;
1004 params[7] = force & 255;
1005 params[8] = effect->u.constant.envelope.attack_level >> 7;
1006 params[9] = effect->u.constant.envelope.attack_length >> 8;
1007 params[10] = effect->u.constant.envelope.attack_length & 255;
1008 params[11] = effect->u.constant.envelope.fade_level >> 7;
1009 params[12] = effect->u.constant.envelope.fade_length >> 8;
1010 params[13] = effect->u.constant.envelope.fade_length & 255;
1011 size = 14;
1012 dbg_hid("Uploading constant force level=%d in dir %d = %d\n",
1013 effect->u.constant.level,
1014 effect->direction, force);
1015 dbg_hid(" envelope attack=(%d, %d ms) fade=(%d, %d ms)\n",
1016 effect->u.constant.envelope.attack_level,
1017 effect->u.constant.envelope.attack_length,
1018 effect->u.constant.envelope.fade_level,
1019 effect->u.constant.envelope.fade_length);
1020 break;
1021 case FF_PERIODIC:
1022 {
1023 switch (effect->u.periodic.waveform) {
1024 case FF_SINE:
1025 params[1] = HIDPP_FF_EFFECT_PERIODIC_SINE;
1026 break;
1027 case FF_SQUARE:
1028 params[1] = HIDPP_FF_EFFECT_PERIODIC_SQUARE;
1029 break;
1030 case FF_SAW_UP:
1031 params[1] = HIDPP_FF_EFFECT_PERIODIC_SAWTOOTHUP;
1032 break;
1033 case FF_SAW_DOWN:
1034 params[1] = HIDPP_FF_EFFECT_PERIODIC_SAWTOOTHDOWN;
1035 break;
1036 case FF_TRIANGLE:
1037 params[1] = HIDPP_FF_EFFECT_PERIODIC_TRIANGLE;
1038 break;
1039 default:
1040 hid_err(data->hidpp->hid_dev, "Unexpected periodic waveform type %i!\n", effect->u.periodic.waveform);
1041 return -EINVAL;
1042 }
1043 force = (effect->u.periodic.magnitude * fixp_sin16((effect->direction * 360) >> 16)) >> 15;
1044 params[6] = effect->u.periodic.magnitude >> 8;
1045 params[7] = effect->u.periodic.magnitude & 255;
1046 params[8] = effect->u.periodic.offset >> 8;
1047 params[9] = effect->u.periodic.offset & 255;
1048 params[10] = effect->u.periodic.period >> 8;
1049 params[11] = effect->u.periodic.period & 255;
1050 params[12] = effect->u.periodic.phase >> 8;
1051 params[13] = effect->u.periodic.phase & 255;
1052 params[14] = effect->u.periodic.envelope.attack_level >> 7;
1053 params[15] = effect->u.periodic.envelope.attack_length >> 8;
1054 params[16] = effect->u.periodic.envelope.attack_length & 255;
1055 params[17] = effect->u.periodic.envelope.fade_level >> 7;
1056 params[18] = effect->u.periodic.envelope.fade_length >> 8;
1057 params[19] = effect->u.periodic.envelope.fade_length & 255;
1058 size = 20;
1059 dbg_hid("Uploading periodic force mag=%d/dir=%d, offset=%d, period=%d ms, phase=%d\n",
1060 effect->u.periodic.magnitude, effect->direction,
1061 effect->u.periodic.offset,
1062 effect->u.periodic.period,
1063 effect->u.periodic.phase);
1064 dbg_hid(" envelope attack=(%d, %d ms) fade=(%d, %d ms)\n",
1065 effect->u.periodic.envelope.attack_level,
1066 effect->u.periodic.envelope.attack_length,
1067 effect->u.periodic.envelope.fade_level,
1068 effect->u.periodic.envelope.fade_length);
1069 break;
1070 }
1071 case FF_RAMP:
1072 params[1] = HIDPP_FF_EFFECT_RAMP;
1073 force = (effect->u.ramp.start_level * fixp_sin16((effect->direction * 360) >> 16)) >> 15;
1074 params[6] = force >> 8;
1075 params[7] = force & 255;
1076 force = (effect->u.ramp.end_level * fixp_sin16((effect->direction * 360) >> 16)) >> 15;
1077 params[8] = force >> 8;
1078 params[9] = force & 255;
1079 params[10] = effect->u.ramp.envelope.attack_level >> 7;
1080 params[11] = effect->u.ramp.envelope.attack_length >> 8;
1081 params[12] = effect->u.ramp.envelope.attack_length & 255;
1082 params[13] = effect->u.ramp.envelope.fade_level >> 7;
1083 params[14] = effect->u.ramp.envelope.fade_length >> 8;
1084 params[15] = effect->u.ramp.envelope.fade_length & 255;
1085 size = 16;
1086 dbg_hid("Uploading ramp force level=%d -> %d in dir %d = %d\n",
1087 effect->u.ramp.start_level,
1088 effect->u.ramp.end_level,
1089 effect->direction, force);
1090 dbg_hid(" envelope attack=(%d, %d ms) fade=(%d, %d ms)\n",
1091 effect->u.ramp.envelope.attack_level,
1092 effect->u.ramp.envelope.attack_length,
1093 effect->u.ramp.envelope.fade_level,
1094 effect->u.ramp.envelope.fade_length);
1095 break;
1096 case FF_FRICTION:
1097 case FF_INERTIA:
1098 case FF_SPRING:
1099 case FF_DAMPER:
1100 params[1] = HIDPP_FF_CONDITION_CMDS[effect->type - FF_SPRING];
1101 params[6] = effect->u.condition[0].left_saturation >> 9;
1102 params[7] = (effect->u.condition[0].left_saturation >> 1) & 255;
1103 params[8] = effect->u.condition[0].left_coeff >> 8;
1104 params[9] = effect->u.condition[0].left_coeff & 255;
1105 params[10] = effect->u.condition[0].deadband >> 9;
1106 params[11] = (effect->u.condition[0].deadband >> 1) & 255;
1107 params[12] = effect->u.condition[0].center >> 8;
1108 params[13] = effect->u.condition[0].center & 255;
1109 params[14] = effect->u.condition[0].right_coeff >> 8;
1110 params[15] = effect->u.condition[0].right_coeff & 255;
1111 params[16] = effect->u.condition[0].right_saturation >> 9;
1112 params[17] = (effect->u.condition[0].right_saturation >> 1) & 255;
1113 size = 18;
1114 dbg_hid("Uploading %s force left coeff=%d, left sat=%d, right coeff=%d, right sat=%d\n",
1115 HIDPP_FF_CONDITION_NAMES[effect->type - FF_SPRING],
1116 effect->u.condition[0].left_coeff,
1117 effect->u.condition[0].left_saturation,
1118 effect->u.condition[0].right_coeff,
1119 effect->u.condition[0].right_saturation);
1120 dbg_hid(" deadband=%d, center=%d\n",
1121 effect->u.condition[0].deadband,
1122 effect->u.condition[0].center);
1123 break;
1124 default:
1125 hid_err(data->hidpp->hid_dev, "Unexpected force type %i!\n", effect->type);
1126 return -EINVAL;
1127 }
1128
1129 return hidpp_ff_queue_work(data, effect->id, HIDPP_FF_DOWNLOAD_EFFECT, params, size);
1130 }
1131
1132 static int hidpp_ff_playback(struct input_dev *dev, int effect_id, int value)
1133 {
1134 struct hidpp_ff_private_data *data = dev->ff->private;
1135 u8 params[2];
1136
1137 params[1] = value ? HIDPP_FF_EFFECT_STATE_PLAY : HIDPP_FF_EFFECT_STATE_STOP;
1138
1139 dbg_hid("St%sing playback of effect %d.\n", value?"art":"opp", effect_id);
1140
1141 return hidpp_ff_queue_work(data, effect_id, HIDPP_FF_SET_EFFECT_STATE, params, ARRAY_SIZE(params));
1142 }
1143
1144 static int hidpp_ff_erase_effect(struct input_dev *dev, int effect_id)
1145 {
1146 struct hidpp_ff_private_data *data = dev->ff->private;
1147 u8 slot = 0;
1148
1149 dbg_hid("Erasing effect %d.\n", effect_id);
1150
1151 return hidpp_ff_queue_work(data, effect_id, HIDPP_FF_DESTROY_EFFECT, &slot, 1);
1152 }
1153
1154 static void hidpp_ff_set_autocenter(struct input_dev *dev, u16 magnitude)
1155 {
1156 struct hidpp_ff_private_data *data = dev->ff->private;
1157 u8 params[18];
1158
1159 dbg_hid("Setting autocenter to %d.\n", magnitude);
1160
1161 /* start a standard spring effect */
1162 params[1] = HIDPP_FF_EFFECT_SPRING | HIDPP_FF_EFFECT_AUTOSTART;
1163 /* zero delay and duration */
1164 params[2] = params[3] = params[4] = params[5] = 0;
1165 /* set coeff to 25% of saturation */
1166 params[8] = params[14] = magnitude >> 11;
1167 params[9] = params[15] = (magnitude >> 3) & 255;
1168 params[6] = params[16] = magnitude >> 9;
1169 params[7] = params[17] = (magnitude >> 1) & 255;
1170 /* zero deadband and center */
1171 params[10] = params[11] = params[12] = params[13] = 0;
1172
1173 hidpp_ff_queue_work(data, HIDPP_FF_EFFECTID_AUTOCENTER, HIDPP_FF_DOWNLOAD_EFFECT, params, ARRAY_SIZE(params));
1174 }
1175
1176 static void hidpp_ff_set_gain(struct input_dev *dev, u16 gain)
1177 {
1178 struct hidpp_ff_private_data *data = dev->ff->private;
1179 u8 params[4];
1180
1181 dbg_hid("Setting gain to %d.\n", gain);
1182
1183 params[0] = gain >> 8;
1184 params[1] = gain & 255;
1185 params[2] = 0; /* no boost */
1186 params[3] = 0;
1187
1188 hidpp_ff_queue_work(data, HIDPP_FF_EFFECTID_NONE, HIDPP_FF_SET_GLOBAL_GAINS, params, ARRAY_SIZE(params));
1189 }
1190
1191 static ssize_t hidpp_ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
1192 {
1193 struct hid_device *hid = to_hid_device(dev);
1194 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
1195 struct input_dev *idev = hidinput->input;
1196 struct hidpp_ff_private_data *data = idev->ff->private;
1197
1198 return scnprintf(buf, PAGE_SIZE, "%u\n", data->range);
1199 }
1200
1201 static ssize_t hidpp_ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1202 {
1203 struct hid_device *hid = to_hid_device(dev);
1204 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
1205 struct input_dev *idev = hidinput->input;
1206 struct hidpp_ff_private_data *data = idev->ff->private;
1207 u8 params[2];
1208 int range = simple_strtoul(buf, NULL, 10);
1209
1210 range = clamp(range, 180, 900);
1211
1212 params[0] = range >> 8;
1213 params[1] = range & 0x00FF;
1214
1215 hidpp_ff_queue_work(data, -1, HIDPP_FF_SET_APERTURE, params, ARRAY_SIZE(params));
1216
1217 return count;
1218 }
1219
1220 static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, hidpp_ff_range_show, hidpp_ff_range_store);
1221
1222 static void hidpp_ff_destroy(struct ff_device *ff)
1223 {
1224 struct hidpp_ff_private_data *data = ff->private;
1225
1226 kfree(data->effect_ids);
1227 }
1228
1229 static int hidpp_ff_init(struct hidpp_device *hidpp, u8 feature_index)
1230 {
1231 struct hid_device *hid = hidpp->hid_dev;
1232 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
1233 struct input_dev *dev = hidinput->input;
1234 const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor);
1235 const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice);
1236 struct ff_device *ff;
1237 struct hidpp_report response;
1238 struct hidpp_ff_private_data *data;
1239 int error, j, num_slots;
1240 u8 version;
1241
1242 if (!dev) {
1243 hid_err(hid, "Struct input_dev not set!\n");
1244 return -EINVAL;
1245 }
1246
1247 /* Get firmware release */
1248 version = bcdDevice & 255;
1249
1250 /* Set supported force feedback capabilities */
1251 for (j = 0; hiddpp_ff_effects[j] >= 0; j++)
1252 set_bit(hiddpp_ff_effects[j], dev->ffbit);
1253 if (version > 1)
1254 for (j = 0; hiddpp_ff_effects_v2[j] >= 0; j++)
1255 set_bit(hiddpp_ff_effects_v2[j], dev->ffbit);
1256
1257 /* Read number of slots available in device */
1258 error = hidpp_send_fap_command_sync(hidpp, feature_index,
1259 HIDPP_FF_GET_INFO, NULL, 0, &response);
1260 if (error) {
1261 if (error < 0)
1262 return error;
1263 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
1264 __func__, error);
1265 return -EPROTO;
1266 }
1267
1268 num_slots = response.fap.params[0] - HIDPP_FF_RESERVED_SLOTS;
1269
1270 error = input_ff_create(dev, num_slots);
1271
1272 if (error) {
1273 hid_err(dev, "Failed to create FF device!\n");
1274 return error;
1275 }
1276
1277 data = kzalloc(sizeof(*data), GFP_KERNEL);
1278 if (!data)
1279 return -ENOMEM;
1280 data->effect_ids = kcalloc(num_slots, sizeof(int), GFP_KERNEL);
1281 if (!data->effect_ids) {
1282 kfree(data);
1283 return -ENOMEM;
1284 }
1285 data->hidpp = hidpp;
1286 data->feature_index = feature_index;
1287 data->version = version;
1288 data->slot_autocenter = 0;
1289 data->num_effects = num_slots;
1290 for (j = 0; j < num_slots; j++)
1291 data->effect_ids[j] = -1;
1292
1293 ff = dev->ff;
1294 ff->private = data;
1295
1296 ff->upload = hidpp_ff_upload_effect;
1297 ff->erase = hidpp_ff_erase_effect;
1298 ff->playback = hidpp_ff_playback;
1299 ff->set_gain = hidpp_ff_set_gain;
1300 ff->set_autocenter = hidpp_ff_set_autocenter;
1301 ff->destroy = hidpp_ff_destroy;
1302
1303
1304 /* reset all forces */
1305 error = hidpp_send_fap_command_sync(hidpp, feature_index,
1306 HIDPP_FF_RESET_ALL, NULL, 0, &response);
1307
1308 /* Read current Range */
1309 error = hidpp_send_fap_command_sync(hidpp, feature_index,
1310 HIDPP_FF_GET_APERTURE, NULL, 0, &response);
1311 if (error)
1312 hid_warn(hidpp->hid_dev, "Failed to read range from device!\n");
1313 data->range = error ? 900 : get_unaligned_be16(&response.fap.params[0]);
1314
1315 /* Create sysfs interface */
1316 error = device_create_file(&(hidpp->hid_dev->dev), &dev_attr_range);
1317 if (error)
1318 hid_warn(hidpp->hid_dev, "Unable to create sysfs interface for \"range\", errno %d!\n", error);
1319
1320 /* Read the current gain values */
1321 error = hidpp_send_fap_command_sync(hidpp, feature_index,
1322 HIDPP_FF_GET_GLOBAL_GAINS, NULL, 0, &response);
1323 if (error)
1324 hid_warn(hidpp->hid_dev, "Failed to read gain values from device!\n");
1325 data->gain = error ? 0xffff : get_unaligned_be16(&response.fap.params[0]);
1326 /* ignore boost value at response.fap.params[2] */
1327
1328 /* init the hardware command queue */
1329 data->wq = create_singlethread_workqueue("hidpp-ff-sendqueue");
1330 atomic_set(&data->workqueue_size, 0);
1331
1332 /* initialize with zero autocenter to get wheel in usable state */
1333 hidpp_ff_set_autocenter(dev, 0);
1334
1335 hid_info(hid, "Force feeback support loaded (firmware release %d).\n", version);
1336
1337 return 0;
1338 }
1339
1340 static int hidpp_ff_deinit(struct hid_device *hid)
1341 {
1342 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
1343 struct input_dev *dev = hidinput->input;
1344 struct hidpp_ff_private_data *data;
1345
1346 if (!dev) {
1347 hid_err(hid, "Struct input_dev not found!\n");
1348 return -EINVAL;
1349 }
1350
1351 hid_info(hid, "Unloading HID++ force feedback.\n");
1352 data = dev->ff->private;
1353 if (!data) {
1354 hid_err(hid, "Private data not found!\n");
1355 return -EINVAL;
1356 }
1357
1358 destroy_workqueue(data->wq);
1359 device_remove_file(&hid->dev, &dev_attr_range);
1360
1361 return 0;
1362 }
1363
1364
1365 /* ************************************************************************** */
1366 /* */
1367 /* Device Support */
1368 /* */
1369 /* ************************************************************************** */
1370
1371 /* -------------------------------------------------------------------------- */
1372 /* Touchpad HID++ devices */
1373 /* -------------------------------------------------------------------------- */
1374
1375 #define WTP_MANUAL_RESOLUTION 39
1376
1377 struct wtp_data {
1378 struct input_dev *input;
1379 u16 x_size, y_size;
1380 u8 finger_count;
1381 u8 mt_feature_index;
1382 u8 button_feature_index;
1383 u8 maxcontacts;
1384 bool flip_y;
1385 unsigned int resolution;
1386 };
1387
1388 static int wtp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1389 struct hid_field *field, struct hid_usage *usage,
1390 unsigned long **bit, int *max)
1391 {
1392 return -1;
1393 }
1394
1395 static void wtp_populate_input(struct hidpp_device *hidpp,
1396 struct input_dev *input_dev, bool origin_is_hid_core)
1397 {
1398 struct wtp_data *wd = hidpp->private_data;
1399
1400 __set_bit(EV_ABS, input_dev->evbit);
1401 __set_bit(EV_KEY, input_dev->evbit);
1402 __clear_bit(EV_REL, input_dev->evbit);
1403 __clear_bit(EV_LED, input_dev->evbit);
1404
1405 input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, wd->x_size, 0, 0);
1406 input_abs_set_res(input_dev, ABS_MT_POSITION_X, wd->resolution);
1407 input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, wd->y_size, 0, 0);
1408 input_abs_set_res(input_dev, ABS_MT_POSITION_Y, wd->resolution);
1409
1410 /* Max pressure is not given by the devices, pick one */
1411 input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 50, 0, 0);
1412
1413 input_set_capability(input_dev, EV_KEY, BTN_LEFT);
1414
1415 if (hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS)
1416 input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
1417 else
1418 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1419
1420 input_mt_init_slots(input_dev, wd->maxcontacts, INPUT_MT_POINTER |
1421 INPUT_MT_DROP_UNUSED);
1422
1423 wd->input = input_dev;
1424 }
1425
1426 static void wtp_touch_event(struct wtp_data *wd,
1427 struct hidpp_touchpad_raw_xy_finger *touch_report)
1428 {
1429 int slot;
1430
1431 if (!touch_report->finger_id || touch_report->contact_type)
1432 /* no actual data */
1433 return;
1434
1435 slot = input_mt_get_slot_by_key(wd->input, touch_report->finger_id);
1436
1437 input_mt_slot(wd->input, slot);
1438 input_mt_report_slot_state(wd->input, MT_TOOL_FINGER,
1439 touch_report->contact_status);
1440 if (touch_report->contact_status) {
1441 input_event(wd->input, EV_ABS, ABS_MT_POSITION_X,
1442 touch_report->x);
1443 input_event(wd->input, EV_ABS, ABS_MT_POSITION_Y,
1444 wd->flip_y ? wd->y_size - touch_report->y :
1445 touch_report->y);
1446 input_event(wd->input, EV_ABS, ABS_MT_PRESSURE,
1447 touch_report->area);
1448 }
1449 }
1450
1451 static void wtp_send_raw_xy_event(struct hidpp_device *hidpp,
1452 struct hidpp_touchpad_raw_xy *raw)
1453 {
1454 struct wtp_data *wd = hidpp->private_data;
1455 int i;
1456
1457 for (i = 0; i < 2; i++)
1458 wtp_touch_event(wd, &(raw->fingers[i]));
1459
1460 if (raw->end_of_frame &&
1461 !(hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS))
1462 input_event(wd->input, EV_KEY, BTN_LEFT, raw->button);
1463
1464 if (raw->end_of_frame || raw->finger_count <= 2) {
1465 input_mt_sync_frame(wd->input);
1466 input_sync(wd->input);
1467 }
1468 }
1469
1470 static int wtp_mouse_raw_xy_event(struct hidpp_device *hidpp, u8 *data)
1471 {
1472 struct wtp_data *wd = hidpp->private_data;
1473 u8 c1_area = ((data[7] & 0xf) * (data[7] & 0xf) +
1474 (data[7] >> 4) * (data[7] >> 4)) / 2;
1475 u8 c2_area = ((data[13] & 0xf) * (data[13] & 0xf) +
1476 (data[13] >> 4) * (data[13] >> 4)) / 2;
1477 struct hidpp_touchpad_raw_xy raw = {
1478 .timestamp = data[1],
1479 .fingers = {
1480 {
1481 .contact_type = 0,
1482 .contact_status = !!data[7],
1483 .x = get_unaligned_le16(&data[3]),
1484 .y = get_unaligned_le16(&data[5]),
1485 .z = c1_area,
1486 .area = c1_area,
1487 .finger_id = data[2],
1488 }, {
1489 .contact_type = 0,
1490 .contact_status = !!data[13],
1491 .x = get_unaligned_le16(&data[9]),
1492 .y = get_unaligned_le16(&data[11]),
1493 .z = c2_area,
1494 .area = c2_area,
1495 .finger_id = data[8],
1496 }
1497 },
1498 .finger_count = wd->maxcontacts,
1499 .spurious_flag = 0,
1500 .end_of_frame = (data[0] >> 7) == 0,
1501 .button = data[0] & 0x01,
1502 };
1503
1504 wtp_send_raw_xy_event(hidpp, &raw);
1505
1506 return 1;
1507 }
1508
1509 static int wtp_raw_event(struct hid_device *hdev, u8 *data, int size)
1510 {
1511 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1512 struct wtp_data *wd = hidpp->private_data;
1513 struct hidpp_report *report = (struct hidpp_report *)data;
1514 struct hidpp_touchpad_raw_xy raw;
1515
1516 if (!wd || !wd->input)
1517 return 1;
1518
1519 switch (data[0]) {
1520 case 0x02:
1521 if (size < 2) {
1522 hid_err(hdev, "Received HID report of bad size (%d)",
1523 size);
1524 return 1;
1525 }
1526 if (hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS) {
1527 input_event(wd->input, EV_KEY, BTN_LEFT,
1528 !!(data[1] & 0x01));
1529 input_event(wd->input, EV_KEY, BTN_RIGHT,
1530 !!(data[1] & 0x02));
1531 input_sync(wd->input);
1532 return 0;
1533 } else {
1534 if (size < 21)
1535 return 1;
1536 return wtp_mouse_raw_xy_event(hidpp, &data[7]);
1537 }
1538 case REPORT_ID_HIDPP_LONG:
1539 /* size is already checked in hidpp_raw_event. */
1540 if ((report->fap.feature_index != wd->mt_feature_index) ||
1541 (report->fap.funcindex_clientid != EVENT_TOUCHPAD_RAW_XY))
1542 return 1;
1543 hidpp_touchpad_raw_xy_event(hidpp, data + 4, &raw);
1544
1545 wtp_send_raw_xy_event(hidpp, &raw);
1546 return 0;
1547 }
1548
1549 return 0;
1550 }
1551
1552 static int wtp_get_config(struct hidpp_device *hidpp)
1553 {
1554 struct wtp_data *wd = hidpp->private_data;
1555 struct hidpp_touchpad_raw_info raw_info = {0};
1556 u8 feature_type;
1557 int ret;
1558
1559 ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_TOUCHPAD_RAW_XY,
1560 &wd->mt_feature_index, &feature_type);
1561 if (ret)
1562 /* means that the device is not powered up */
1563 return ret;
1564
1565 ret = hidpp_touchpad_get_raw_info(hidpp, wd->mt_feature_index,
1566 &raw_info);
1567 if (ret)
1568 return ret;
1569
1570 wd->x_size = raw_info.x_size;
1571 wd->y_size = raw_info.y_size;
1572 wd->maxcontacts = raw_info.maxcontacts;
1573 wd->flip_y = raw_info.origin == TOUCHPAD_RAW_XY_ORIGIN_LOWER_LEFT;
1574 wd->resolution = raw_info.res;
1575 if (!wd->resolution)
1576 wd->resolution = WTP_MANUAL_RESOLUTION;
1577
1578 return 0;
1579 }
1580
1581 static int wtp_allocate(struct hid_device *hdev, const struct hid_device_id *id)
1582 {
1583 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1584 struct wtp_data *wd;
1585
1586 wd = devm_kzalloc(&hdev->dev, sizeof(struct wtp_data),
1587 GFP_KERNEL);
1588 if (!wd)
1589 return -ENOMEM;
1590
1591 hidpp->private_data = wd;
1592
1593 return 0;
1594 };
1595
1596 static int wtp_connect(struct hid_device *hdev, bool connected)
1597 {
1598 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1599 struct wtp_data *wd = hidpp->private_data;
1600 int ret;
1601
1602 if (!connected)
1603 return 0;
1604
1605 if (!wd->x_size) {
1606 ret = wtp_get_config(hidpp);
1607 if (ret) {
1608 hid_err(hdev, "Can not get wtp config: %d\n", ret);
1609 return ret;
1610 }
1611 }
1612
1613 return hidpp_touchpad_set_raw_report_state(hidpp, wd->mt_feature_index,
1614 true, true);
1615 }
1616
1617 /* ------------------------------------------------------------------------- */
1618 /* Logitech M560 devices */
1619 /* ------------------------------------------------------------------------- */
1620
1621 /*
1622 * Logitech M560 protocol overview
1623 *
1624 * The Logitech M560 mouse, is designed for windows 8. When the middle and/or
1625 * the sides buttons are pressed, it sends some keyboard keys events
1626 * instead of buttons ones.
1627 * To complicate things further, the middle button keys sequence
1628 * is different from the odd press and the even press.
1629 *
1630 * forward button -> Super_R
1631 * backward button -> Super_L+'d' (press only)
1632 * middle button -> 1st time: Alt_L+SuperL+XF86TouchpadOff (press only)
1633 * 2nd time: left-click (press only)
1634 * NB: press-only means that when the button is pressed, the
1635 * KeyPress/ButtonPress and KeyRelease/ButtonRelease events are generated
1636 * together sequentially; instead when the button is released, no event is
1637 * generated !
1638 *
1639 * With the command
1640 * 10<xx>0a 3500af03 (where <xx> is the mouse id),
1641 * the mouse reacts differently:
1642 * - it never sends a keyboard key event
1643 * - for the three mouse button it sends:
1644 * middle button press 11<xx>0a 3500af00...
1645 * side 1 button (forward) press 11<xx>0a 3500b000...
1646 * side 2 button (backward) press 11<xx>0a 3500ae00...
1647 * middle/side1/side2 button release 11<xx>0a 35000000...
1648 */
1649
1650 static const u8 m560_config_parameter[] = {0x00, 0xaf, 0x03};
1651
1652 struct m560_private_data {
1653 struct input_dev *input;
1654 };
1655
1656 /* how buttons are mapped in the report */
1657 #define M560_MOUSE_BTN_LEFT 0x01
1658 #define M560_MOUSE_BTN_RIGHT 0x02
1659 #define M560_MOUSE_BTN_WHEEL_LEFT 0x08
1660 #define M560_MOUSE_BTN_WHEEL_RIGHT 0x10
1661
1662 #define M560_SUB_ID 0x0a
1663 #define M560_BUTTON_MODE_REGISTER 0x35
1664
1665 static int m560_send_config_command(struct hid_device *hdev, bool connected)
1666 {
1667 struct hidpp_report response;
1668 struct hidpp_device *hidpp_dev;
1669
1670 hidpp_dev = hid_get_drvdata(hdev);
1671
1672 if (!connected)
1673 return -ENODEV;
1674
1675 return hidpp_send_rap_command_sync(
1676 hidpp_dev,
1677 REPORT_ID_HIDPP_SHORT,
1678 M560_SUB_ID,
1679 M560_BUTTON_MODE_REGISTER,
1680 (u8 *)m560_config_parameter,
1681 sizeof(m560_config_parameter),
1682 &response
1683 );
1684 }
1685
1686 static int m560_allocate(struct hid_device *hdev)
1687 {
1688 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1689 struct m560_private_data *d;
1690
1691 d = devm_kzalloc(&hdev->dev, sizeof(struct m560_private_data),
1692 GFP_KERNEL);
1693 if (!d)
1694 return -ENOMEM;
1695
1696 hidpp->private_data = d;
1697
1698 return 0;
1699 };
1700
1701 static int m560_raw_event(struct hid_device *hdev, u8 *data, int size)
1702 {
1703 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1704 struct m560_private_data *mydata = hidpp->private_data;
1705
1706 /* sanity check */
1707 if (!mydata || !mydata->input) {
1708 hid_err(hdev, "error in parameter\n");
1709 return -EINVAL;
1710 }
1711
1712 if (size < 7) {
1713 hid_err(hdev, "error in report\n");
1714 return 0;
1715 }
1716
1717 if (data[0] == REPORT_ID_HIDPP_LONG &&
1718 data[2] == M560_SUB_ID && data[6] == 0x00) {
1719 /*
1720 * m560 mouse report for middle, forward and backward button
1721 *
1722 * data[0] = 0x11
1723 * data[1] = device-id
1724 * data[2] = 0x0a
1725 * data[5] = 0xaf -> middle
1726 * 0xb0 -> forward
1727 * 0xae -> backward
1728 * 0x00 -> release all
1729 * data[6] = 0x00
1730 */
1731
1732 switch (data[5]) {
1733 case 0xaf:
1734 input_report_key(mydata->input, BTN_MIDDLE, 1);
1735 break;
1736 case 0xb0:
1737 input_report_key(mydata->input, BTN_FORWARD, 1);
1738 break;
1739 case 0xae:
1740 input_report_key(mydata->input, BTN_BACK, 1);
1741 break;
1742 case 0x00:
1743 input_report_key(mydata->input, BTN_BACK, 0);
1744 input_report_key(mydata->input, BTN_FORWARD, 0);
1745 input_report_key(mydata->input, BTN_MIDDLE, 0);
1746 break;
1747 default:
1748 hid_err(hdev, "error in report\n");
1749 return 0;
1750 }
1751 input_sync(mydata->input);
1752
1753 } else if (data[0] == 0x02) {
1754 /*
1755 * Logitech M560 mouse report
1756 *
1757 * data[0] = type (0x02)
1758 * data[1..2] = buttons
1759 * data[3..5] = xy
1760 * data[6] = wheel
1761 */
1762
1763 int v;
1764
1765 input_report_key(mydata->input, BTN_LEFT,
1766 !!(data[1] & M560_MOUSE_BTN_LEFT));
1767 input_report_key(mydata->input, BTN_RIGHT,
1768 !!(data[1] & M560_MOUSE_BTN_RIGHT));
1769
1770 if (data[1] & M560_MOUSE_BTN_WHEEL_LEFT)
1771 input_report_rel(mydata->input, REL_HWHEEL, -1);
1772 else if (data[1] & M560_MOUSE_BTN_WHEEL_RIGHT)
1773 input_report_rel(mydata->input, REL_HWHEEL, 1);
1774
1775 v = hid_snto32(hid_field_extract(hdev, data+3, 0, 12), 12);
1776 input_report_rel(mydata->input, REL_X, v);
1777
1778 v = hid_snto32(hid_field_extract(hdev, data+3, 12, 12), 12);
1779 input_report_rel(mydata->input, REL_Y, v);
1780
1781 v = hid_snto32(data[6], 8);
1782 input_report_rel(mydata->input, REL_WHEEL, v);
1783
1784 input_sync(mydata->input);
1785 }
1786
1787 return 1;
1788 }
1789
1790 static void m560_populate_input(struct hidpp_device *hidpp,
1791 struct input_dev *input_dev, bool origin_is_hid_core)
1792 {
1793 struct m560_private_data *mydata = hidpp->private_data;
1794
1795 mydata->input = input_dev;
1796
1797 __set_bit(EV_KEY, mydata->input->evbit);
1798 __set_bit(BTN_MIDDLE, mydata->input->keybit);
1799 __set_bit(BTN_RIGHT, mydata->input->keybit);
1800 __set_bit(BTN_LEFT, mydata->input->keybit);
1801 __set_bit(BTN_BACK, mydata->input->keybit);
1802 __set_bit(BTN_FORWARD, mydata->input->keybit);
1803
1804 __set_bit(EV_REL, mydata->input->evbit);
1805 __set_bit(REL_X, mydata->input->relbit);
1806 __set_bit(REL_Y, mydata->input->relbit);
1807 __set_bit(REL_WHEEL, mydata->input->relbit);
1808 __set_bit(REL_HWHEEL, mydata->input->relbit);
1809 }
1810
1811 static int m560_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1812 struct hid_field *field, struct hid_usage *usage,
1813 unsigned long **bit, int *max)
1814 {
1815 return -1;
1816 }
1817
1818 /* ------------------------------------------------------------------------- */
1819 /* Logitech K400 devices */
1820 /* ------------------------------------------------------------------------- */
1821
1822 /*
1823 * The Logitech K400 keyboard has an embedded touchpad which is seen
1824 * as a mouse from the OS point of view. There is a hardware shortcut to disable
1825 * tap-to-click but the setting is not remembered accross reset, annoying some
1826 * users.
1827 *
1828 * We can toggle this feature from the host by using the feature 0x6010:
1829 * Touchpad FW items
1830 */
1831
1832 struct k400_private_data {
1833 u8 feature_index;
1834 };
1835
1836 static int k400_disable_tap_to_click(struct hidpp_device *hidpp)
1837 {
1838 struct k400_private_data *k400 = hidpp->private_data;
1839 struct hidpp_touchpad_fw_items items = {};
1840 int ret;
1841 u8 feature_type;
1842
1843 if (!k400->feature_index) {
1844 ret = hidpp_root_get_feature(hidpp,
1845 HIDPP_PAGE_TOUCHPAD_FW_ITEMS,
1846 &k400->feature_index, &feature_type);
1847 if (ret)
1848 /* means that the device is not powered up */
1849 return ret;
1850 }
1851
1852 ret = hidpp_touchpad_fw_items_set(hidpp, k400->feature_index, &items);
1853 if (ret)
1854 return ret;
1855
1856 return 0;
1857 }
1858
1859 static int k400_allocate(struct hid_device *hdev)
1860 {
1861 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1862 struct k400_private_data *k400;
1863
1864 k400 = devm_kzalloc(&hdev->dev, sizeof(struct k400_private_data),
1865 GFP_KERNEL);
1866 if (!k400)
1867 return -ENOMEM;
1868
1869 hidpp->private_data = k400;
1870
1871 return 0;
1872 };
1873
1874 static int k400_connect(struct hid_device *hdev, bool connected)
1875 {
1876 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1877
1878 if (!connected)
1879 return 0;
1880
1881 if (!disable_tap_to_click)
1882 return 0;
1883
1884 return k400_disable_tap_to_click(hidpp);
1885 }
1886
1887 /* ------------------------------------------------------------------------- */
1888 /* Logitech G920 Driving Force Racing Wheel for Xbox One */
1889 /* ------------------------------------------------------------------------- */
1890
1891 #define HIDPP_PAGE_G920_FORCE_FEEDBACK 0x8123
1892
1893 static int g920_get_config(struct hidpp_device *hidpp)
1894 {
1895 u8 feature_type;
1896 u8 feature_index;
1897 int ret;
1898
1899 /* Find feature and store for later use */
1900 ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_G920_FORCE_FEEDBACK,
1901 &feature_index, &feature_type);
1902 if (ret)
1903 return ret;
1904
1905 ret = hidpp_ff_init(hidpp, feature_index);
1906 if (ret)
1907 hid_warn(hidpp->hid_dev, "Unable to initialize force feedback support, errno %d\n",
1908 ret);
1909
1910 return 0;
1911 }
1912
1913 /* -------------------------------------------------------------------------- */
1914 /* Generic HID++ devices */
1915 /* -------------------------------------------------------------------------- */
1916
1917 static int hidpp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1918 struct hid_field *field, struct hid_usage *usage,
1919 unsigned long **bit, int *max)
1920 {
1921 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1922
1923 if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
1924 return wtp_input_mapping(hdev, hi, field, usage, bit, max);
1925 else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560 &&
1926 field->application != HID_GD_MOUSE)
1927 return m560_input_mapping(hdev, hi, field, usage, bit, max);
1928
1929 return 0;
1930 }
1931
1932 static int hidpp_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1933 struct hid_field *field, struct hid_usage *usage,
1934 unsigned long **bit, int *max)
1935 {
1936 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1937
1938 /* Ensure that Logitech G920 is not given a default fuzz/flat value */
1939 if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
1940 if (usage->type == EV_ABS && (usage->code == ABS_X ||
1941 usage->code == ABS_Y || usage->code == ABS_Z ||
1942 usage->code == ABS_RZ)) {
1943 field->application = HID_GD_MULTIAXIS;
1944 }
1945 }
1946
1947 return 0;
1948 }
1949
1950
1951 static void hidpp_populate_input(struct hidpp_device *hidpp,
1952 struct input_dev *input, bool origin_is_hid_core)
1953 {
1954 if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
1955 wtp_populate_input(hidpp, input, origin_is_hid_core);
1956 else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560)
1957 m560_populate_input(hidpp, input, origin_is_hid_core);
1958 }
1959
1960 static int hidpp_input_configured(struct hid_device *hdev,
1961 struct hid_input *hidinput)
1962 {
1963 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1964 struct input_dev *input = hidinput->input;
1965
1966 hidpp_populate_input(hidpp, input, true);
1967
1968 return 0;
1969 }
1970
1971 static int hidpp_raw_hidpp_event(struct hidpp_device *hidpp, u8 *data,
1972 int size)
1973 {
1974 struct hidpp_report *question = hidpp->send_receive_buf;
1975 struct hidpp_report *answer = hidpp->send_receive_buf;
1976 struct hidpp_report *report = (struct hidpp_report *)data;
1977
1978 /*
1979 * If the mutex is locked then we have a pending answer from a
1980 * previously sent command.
1981 */
1982 if (unlikely(mutex_is_locked(&hidpp->send_mutex))) {
1983 /*
1984 * Check for a correct hidpp20 answer or the corresponding
1985 * error
1986 */
1987 if (hidpp_match_answer(question, report) ||
1988 hidpp_match_error(question, report)) {
1989 *answer = *report;
1990 hidpp->answer_available = true;
1991 wake_up(&hidpp->wait);
1992 /*
1993 * This was an answer to a command that this driver sent
1994 * We return 1 to hid-core to avoid forwarding the
1995 * command upstream as it has been treated by the driver
1996 */
1997
1998 return 1;
1999 }
2000 }
2001
2002 if (unlikely(hidpp_report_is_connect_event(report))) {
2003 atomic_set(&hidpp->connected,
2004 !(report->rap.params[0] & (1 << 6)));
2005 if ((hidpp->quirks & HIDPP_QUIRK_CONNECT_EVENTS) &&
2006 (schedule_work(&hidpp->work) == 0))
2007 dbg_hid("%s: connect event already queued\n", __func__);
2008 return 1;
2009 }
2010
2011 return 0;
2012 }
2013
2014 static int hidpp_raw_event(struct hid_device *hdev, struct hid_report *report,
2015 u8 *data, int size)
2016 {
2017 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2018 int ret = 0;
2019
2020 /* Generic HID++ processing. */
2021 switch (data[0]) {
2022 case REPORT_ID_HIDPP_VERY_LONG:
2023 if (size != HIDPP_REPORT_VERY_LONG_LENGTH) {
2024 hid_err(hdev, "received hid++ report of bad size (%d)",
2025 size);
2026 return 1;
2027 }
2028 ret = hidpp_raw_hidpp_event(hidpp, data, size);
2029 break;
2030 case REPORT_ID_HIDPP_LONG:
2031 if (size != HIDPP_REPORT_LONG_LENGTH) {
2032 hid_err(hdev, "received hid++ report of bad size (%d)",
2033 size);
2034 return 1;
2035 }
2036 ret = hidpp_raw_hidpp_event(hidpp, data, size);
2037 break;
2038 case REPORT_ID_HIDPP_SHORT:
2039 if (size != HIDPP_REPORT_SHORT_LENGTH) {
2040 hid_err(hdev, "received hid++ report of bad size (%d)",
2041 size);
2042 return 1;
2043 }
2044 ret = hidpp_raw_hidpp_event(hidpp, data, size);
2045 break;
2046 }
2047
2048 /* If no report is available for further processing, skip calling
2049 * raw_event of subclasses. */
2050 if (ret != 0)
2051 return ret;
2052
2053 if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
2054 return wtp_raw_event(hdev, data, size);
2055 else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560)
2056 return m560_raw_event(hdev, data, size);
2057
2058 return 0;
2059 }
2060
2061 static void hidpp_overwrite_name(struct hid_device *hdev, bool use_unifying)
2062 {
2063 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2064 char *name;
2065
2066 if (use_unifying)
2067 /*
2068 * the device is connected through an Unifying receiver, and
2069 * might not be already connected.
2070 * Ask the receiver for its name.
2071 */
2072 name = hidpp_get_unifying_name(hidpp);
2073 else
2074 name = hidpp_get_device_name(hidpp);
2075
2076 if (!name) {
2077 hid_err(hdev, "unable to retrieve the name of the device");
2078 } else {
2079 dbg_hid("HID++: Got name: %s\n", name);
2080 snprintf(hdev->name, sizeof(hdev->name), "%s", name);
2081 }
2082
2083 kfree(name);
2084 }
2085
2086 static int hidpp_input_open(struct input_dev *dev)
2087 {
2088 struct hid_device *hid = input_get_drvdata(dev);
2089
2090 return hid_hw_open(hid);
2091 }
2092
2093 static void hidpp_input_close(struct input_dev *dev)
2094 {
2095 struct hid_device *hid = input_get_drvdata(dev);
2096
2097 hid_hw_close(hid);
2098 }
2099
2100 static struct input_dev *hidpp_allocate_input(struct hid_device *hdev)
2101 {
2102 struct input_dev *input_dev = devm_input_allocate_device(&hdev->dev);
2103 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2104
2105 if (!input_dev)
2106 return NULL;
2107
2108 input_set_drvdata(input_dev, hdev);
2109 input_dev->open = hidpp_input_open;
2110 input_dev->close = hidpp_input_close;
2111
2112 input_dev->name = hidpp->name;
2113 input_dev->phys = hdev->phys;
2114 input_dev->uniq = hdev->uniq;
2115 input_dev->id.bustype = hdev->bus;
2116 input_dev->id.vendor = hdev->vendor;
2117 input_dev->id.product = hdev->product;
2118 input_dev->id.version = hdev->version;
2119 input_dev->dev.parent = &hdev->dev;
2120
2121 return input_dev;
2122 }
2123
2124 static void hidpp_connect_event(struct hidpp_device *hidpp)
2125 {
2126 struct hid_device *hdev = hidpp->hid_dev;
2127 int ret = 0;
2128 bool connected = atomic_read(&hidpp->connected);
2129 struct input_dev *input;
2130 char *name, *devm_name;
2131
2132 if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP) {
2133 ret = wtp_connect(hdev, connected);
2134 if (ret)
2135 return;
2136 } else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560) {
2137 ret = m560_send_config_command(hdev, connected);
2138 if (ret)
2139 return;
2140 } else if (hidpp->quirks & HIDPP_QUIRK_CLASS_K400) {
2141 ret = k400_connect(hdev, connected);
2142 if (ret)
2143 return;
2144 }
2145
2146 if (!connected || hidpp->delayed_input)
2147 return;
2148
2149 /* the device is already connected, we can ask for its name and
2150 * protocol */
2151 if (!hidpp->protocol_major) {
2152 ret = !hidpp_is_connected(hidpp);
2153 if (ret) {
2154 hid_err(hdev, "Can not get the protocol version.\n");
2155 return;
2156 }
2157 hid_info(hdev, "HID++ %u.%u device connected.\n",
2158 hidpp->protocol_major, hidpp->protocol_minor);
2159 }
2160
2161 if (!(hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT))
2162 /* if HID created the input nodes for us, we can stop now */
2163 return;
2164
2165 if (!hidpp->name || hidpp->name == hdev->name) {
2166 name = hidpp_get_device_name(hidpp);
2167 if (!name) {
2168 hid_err(hdev,
2169 "unable to retrieve the name of the device");
2170 return;
2171 }
2172
2173 devm_name = devm_kasprintf(&hdev->dev, GFP_KERNEL, "%s", name);
2174 kfree(name);
2175 if (!devm_name)
2176 return;
2177
2178 hidpp->name = devm_name;
2179 }
2180
2181 input = hidpp_allocate_input(hdev);
2182 if (!input) {
2183 hid_err(hdev, "cannot allocate new input device: %d\n", ret);
2184 return;
2185 }
2186
2187 hidpp_populate_input(hidpp, input, false);
2188
2189 ret = input_register_device(input);
2190 if (ret)
2191 input_free_device(input);
2192
2193 hidpp->delayed_input = input;
2194 }
2195
2196 static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
2197 {
2198 struct hidpp_device *hidpp;
2199 int ret;
2200 bool connected;
2201 unsigned int connect_mask = HID_CONNECT_DEFAULT;
2202
2203 hidpp = devm_kzalloc(&hdev->dev, sizeof(struct hidpp_device),
2204 GFP_KERNEL);
2205 if (!hidpp)
2206 return -ENOMEM;
2207
2208 hidpp->hid_dev = hdev;
2209 hidpp->name = hdev->name;
2210 hid_set_drvdata(hdev, hidpp);
2211
2212 hidpp->quirks = id->driver_data;
2213
2214 if (disable_raw_mode) {
2215 hidpp->quirks &= ~HIDPP_QUIRK_CLASS_WTP;
2216 hidpp->quirks &= ~HIDPP_QUIRK_CONNECT_EVENTS;
2217 hidpp->quirks &= ~HIDPP_QUIRK_NO_HIDINPUT;
2218 }
2219
2220 if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP) {
2221 ret = wtp_allocate(hdev, id);
2222 if (ret)
2223 goto allocate_fail;
2224 } else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560) {
2225 ret = m560_allocate(hdev);
2226 if (ret)
2227 goto allocate_fail;
2228 } else if (hidpp->quirks & HIDPP_QUIRK_CLASS_K400) {
2229 ret = k400_allocate(hdev);
2230 if (ret)
2231 goto allocate_fail;
2232 }
2233
2234 INIT_WORK(&hidpp->work, delayed_work_cb);
2235 mutex_init(&hidpp->send_mutex);
2236 init_waitqueue_head(&hidpp->wait);
2237
2238 ret = hid_parse(hdev);
2239 if (ret) {
2240 hid_err(hdev, "%s:parse failed\n", __func__);
2241 goto hid_parse_fail;
2242 }
2243
2244 if (hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT)
2245 connect_mask &= ~HID_CONNECT_HIDINPUT;
2246
2247 if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
2248 ret = hid_hw_start(hdev, connect_mask);
2249 if (ret) {
2250 hid_err(hdev, "hw start failed\n");
2251 goto hid_hw_start_fail;
2252 }
2253 ret = hid_hw_open(hdev);
2254 if (ret < 0) {
2255 dev_err(&hdev->dev, "%s:hid_hw_open returned error:%d\n",
2256 __func__, ret);
2257 hid_hw_stop(hdev);
2258 goto hid_hw_start_fail;
2259 }
2260 }
2261
2262
2263 /* Allow incoming packets */
2264 hid_device_io_start(hdev);
2265
2266 connected = hidpp_is_connected(hidpp);
2267 if (id->group != HID_GROUP_LOGITECH_DJ_DEVICE) {
2268 if (!connected) {
2269 ret = -ENODEV;
2270 hid_err(hdev, "Device not connected");
2271 goto hid_hw_open_failed;
2272 }
2273
2274 hid_info(hdev, "HID++ %u.%u device connected.\n",
2275 hidpp->protocol_major, hidpp->protocol_minor);
2276 }
2277
2278 hidpp_overwrite_name(hdev, id->group == HID_GROUP_LOGITECH_DJ_DEVICE);
2279 atomic_set(&hidpp->connected, connected);
2280
2281 if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)) {
2282 ret = wtp_get_config(hidpp);
2283 if (ret)
2284 goto hid_hw_open_failed;
2285 } else if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_G920)) {
2286 ret = g920_get_config(hidpp);
2287 if (ret)
2288 goto hid_hw_open_failed;
2289 }
2290
2291 /* Block incoming packets */
2292 hid_device_io_stop(hdev);
2293
2294 if (!(hidpp->quirks & HIDPP_QUIRK_CLASS_G920)) {
2295 ret = hid_hw_start(hdev, connect_mask);
2296 if (ret) {
2297 hid_err(hdev, "%s:hid_hw_start returned error\n", __func__);
2298 goto hid_hw_start_fail;
2299 }
2300 }
2301
2302 if (hidpp->quirks & HIDPP_QUIRK_CONNECT_EVENTS) {
2303 /* Allow incoming packets */
2304 hid_device_io_start(hdev);
2305
2306 hidpp_connect_event(hidpp);
2307 }
2308
2309 return ret;
2310
2311 hid_hw_open_failed:
2312 hid_device_io_stop(hdev);
2313 if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
2314 hid_hw_close(hdev);
2315 hid_hw_stop(hdev);
2316 }
2317 hid_hw_start_fail:
2318 hid_parse_fail:
2319 cancel_work_sync(&hidpp->work);
2320 mutex_destroy(&hidpp->send_mutex);
2321 allocate_fail:
2322 hid_set_drvdata(hdev, NULL);
2323 return ret;
2324 }
2325
2326 static void hidpp_remove(struct hid_device *hdev)
2327 {
2328 struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2329
2330 if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
2331 hidpp_ff_deinit(hdev);
2332 hid_hw_close(hdev);
2333 }
2334 hid_hw_stop(hdev);
2335 cancel_work_sync(&hidpp->work);
2336 mutex_destroy(&hidpp->send_mutex);
2337 }
2338
2339 static const struct hid_device_id hidpp_devices[] = {
2340 { /* wireless touchpad */
2341 HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
2342 USB_VENDOR_ID_LOGITECH, 0x4011),
2343 .driver_data = HIDPP_QUIRK_CLASS_WTP | HIDPP_QUIRK_DELAYED_INIT |
2344 HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS },
2345 { /* wireless touchpad T650 */
2346 HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
2347 USB_VENDOR_ID_LOGITECH, 0x4101),
2348 .driver_data = HIDPP_QUIRK_CLASS_WTP | HIDPP_QUIRK_DELAYED_INIT },
2349 { /* wireless touchpad T651 */
2350 HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
2351 USB_DEVICE_ID_LOGITECH_T651),
2352 .driver_data = HIDPP_QUIRK_CLASS_WTP },
2353 { /* Mouse logitech M560 */
2354 HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
2355 USB_VENDOR_ID_LOGITECH, 0x402d),
2356 .driver_data = HIDPP_QUIRK_DELAYED_INIT | HIDPP_QUIRK_CLASS_M560 },
2357 { /* Keyboard logitech K400 */
2358 HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
2359 USB_VENDOR_ID_LOGITECH, 0x4024),
2360 .driver_data = HIDPP_QUIRK_CONNECT_EVENTS | HIDPP_QUIRK_CLASS_K400 },
2361
2362 { HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
2363 USB_VENDOR_ID_LOGITECH, HID_ANY_ID)},
2364
2365 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G920_WHEEL),
2366 .driver_data = HIDPP_QUIRK_CLASS_G920 | HIDPP_QUIRK_FORCE_OUTPUT_REPORTS},
2367 {}
2368 };
2369
2370 MODULE_DEVICE_TABLE(hid, hidpp_devices);
2371
2372 static struct hid_driver hidpp_driver = {
2373 .name = "logitech-hidpp-device",
2374 .id_table = hidpp_devices,
2375 .probe = hidpp_probe,
2376 .remove = hidpp_remove,
2377 .raw_event = hidpp_raw_event,
2378 .input_configured = hidpp_input_configured,
2379 .input_mapping = hidpp_input_mapping,
2380 .input_mapped = hidpp_input_mapped,
2381 };
2382
2383 module_hid_driver(hidpp_driver);
Linux with added FPC-III support