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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / hid / hid-logitech-dj.c
blob1ffcfc9a1e033b9015a2c88ce72b2b5710e4ee49
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * HID driver for Logitech receivers
4 *
5 * Copyright (c) 2011 Logitech
6 */
7
8
9
10 #include <linux/device.h>
11 #include <linux/hid.h>
12 #include <linux/module.h>
13 #include <linux/kfifo.h>
14 #include <linux/delay.h>
15 #include <linux/usb.h> /* For to_usb_interface for kvm extra intf check */
16 #include <asm/unaligned.h>
17 #include "hid-ids.h"
18
19 #define DJ_MAX_PAIRED_DEVICES 7
20 #define DJ_MAX_NUMBER_NOTIFS 8
21 #define DJ_RECEIVER_INDEX 0
22 #define DJ_DEVICE_INDEX_MIN 1
23 #define DJ_DEVICE_INDEX_MAX 7
24
25 #define DJREPORT_SHORT_LENGTH 15
26 #define DJREPORT_LONG_LENGTH 32
27
28 #define REPORT_ID_DJ_SHORT 0x20
29 #define REPORT_ID_DJ_LONG 0x21
30
31 #define REPORT_ID_HIDPP_SHORT 0x10
32 #define REPORT_ID_HIDPP_LONG 0x11
33 #define REPORT_ID_HIDPP_VERY_LONG 0x12
34
35 #define HIDPP_REPORT_SHORT_LENGTH 7
36 #define HIDPP_REPORT_LONG_LENGTH 20
37
38 #define HIDPP_RECEIVER_INDEX 0xff
39
40 #define REPORT_TYPE_RFREPORT_FIRST 0x01
41 #define REPORT_TYPE_RFREPORT_LAST 0x1F
42
43 /* Command Switch to DJ mode */
44 #define REPORT_TYPE_CMD_SWITCH 0x80
45 #define CMD_SWITCH_PARAM_DEVBITFIELD 0x00
46 #define CMD_SWITCH_PARAM_TIMEOUT_SECONDS 0x01
47 #define TIMEOUT_NO_KEEPALIVE 0x00
48
49 /* Command to Get the list of Paired devices */
50 #define REPORT_TYPE_CMD_GET_PAIRED_DEVICES 0x81
51
52 /* Device Paired Notification */
53 #define REPORT_TYPE_NOTIF_DEVICE_PAIRED 0x41
54 #define SPFUNCTION_MORE_NOTIF_EXPECTED 0x01
55 #define SPFUNCTION_DEVICE_LIST_EMPTY 0x02
56 #define DEVICE_PAIRED_PARAM_SPFUNCTION 0x00
57 #define DEVICE_PAIRED_PARAM_EQUAD_ID_LSB 0x01
58 #define DEVICE_PAIRED_PARAM_EQUAD_ID_MSB 0x02
59 #define DEVICE_PAIRED_RF_REPORT_TYPE 0x03
60
61 /* Device Un-Paired Notification */
62 #define REPORT_TYPE_NOTIF_DEVICE_UNPAIRED 0x40
63
64 /* Connection Status Notification */
65 #define REPORT_TYPE_NOTIF_CONNECTION_STATUS 0x42
66 #define CONNECTION_STATUS_PARAM_STATUS 0x00
67 #define STATUS_LINKLOSS 0x01
68
69 /* Error Notification */
70 #define REPORT_TYPE_NOTIF_ERROR 0x7F
71 #define NOTIF_ERROR_PARAM_ETYPE 0x00
72 #define ETYPE_KEEPALIVE_TIMEOUT 0x01
73
74 /* supported DJ HID && RF report types */
75 #define REPORT_TYPE_KEYBOARD 0x01
76 #define REPORT_TYPE_MOUSE 0x02
77 #define REPORT_TYPE_CONSUMER_CONTROL 0x03
78 #define REPORT_TYPE_SYSTEM_CONTROL 0x04
79 #define REPORT_TYPE_MEDIA_CENTER 0x08
80 #define REPORT_TYPE_LEDS 0x0E
81
82 /* RF Report types bitfield */
83 #define STD_KEYBOARD BIT(1)
84 #define STD_MOUSE BIT(2)
85 #define MULTIMEDIA BIT(3)
86 #define POWER_KEYS BIT(4)
87 #define MEDIA_CENTER BIT(8)
88 #define KBD_LEDS BIT(14)
89 /* Fake (bitnr > NUMBER_OF_HID_REPORTS) bit to track HID++ capability */
90 #define HIDPP BIT_ULL(63)
91
92 /* HID++ Device Connected Notification */
93 #define REPORT_TYPE_NOTIF_DEVICE_CONNECTED 0x41
94 #define HIDPP_PARAM_PROTO_TYPE 0x00
95 #define HIDPP_PARAM_DEVICE_INFO 0x01
96 #define HIDPP_PARAM_EQUAD_LSB 0x02
97 #define HIDPP_PARAM_EQUAD_MSB 0x03
98 #define HIDPP_PARAM_27MHZ_DEVID 0x03
99 #define HIDPP_DEVICE_TYPE_MASK GENMASK(3, 0)
100 #define HIDPP_LINK_STATUS_MASK BIT(6)
101 #define HIDPP_MANUFACTURER_MASK BIT(7)
102
103 #define HIDPP_DEVICE_TYPE_KEYBOARD 1
104 #define HIDPP_DEVICE_TYPE_MOUSE 2
105
106 #define HIDPP_SET_REGISTER 0x80
107 #define HIDPP_GET_LONG_REGISTER 0x83
108 #define HIDPP_REG_CONNECTION_STATE 0x02
109 #define HIDPP_REG_PAIRING_INFORMATION 0xB5
110 #define HIDPP_PAIRING_INFORMATION 0x20
111 #define HIDPP_FAKE_DEVICE_ARRIVAL 0x02
112
113 enum recvr_type {
114 recvr_type_dj,
115 recvr_type_hidpp,
116 recvr_type_gaming_hidpp,
117 recvr_type_mouse_only,
118 recvr_type_27mhz,
119 recvr_type_bluetooth,
120 };
121
122 struct dj_report {
123 u8 report_id;
124 u8 device_index;
125 u8 report_type;
126 u8 report_params[DJREPORT_SHORT_LENGTH - 3];
127 };
128
129 struct hidpp_event {
130 u8 report_id;
131 u8 device_index;
132 u8 sub_id;
133 u8 params[HIDPP_REPORT_LONG_LENGTH - 3U];
134 } __packed;
135
136 struct dj_receiver_dev {
137 struct hid_device *mouse;
138 struct hid_device *keyboard;
139 struct hid_device *hidpp;
140 struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES +
141 DJ_DEVICE_INDEX_MIN];
142 struct list_head list;
143 struct kref kref;
144 struct work_struct work;
145 struct kfifo notif_fifo;
146 unsigned long last_query; /* in jiffies */
147 bool ready;
148 enum recvr_type type;
149 unsigned int unnumbered_application;
150 spinlock_t lock;
151 };
152
153 struct dj_device {
154 struct hid_device *hdev;
155 struct dj_receiver_dev *dj_receiver_dev;
156 u64 reports_supported;
157 u8 device_index;
158 };
159
160 #define WORKITEM_TYPE_EMPTY 0
161 #define WORKITEM_TYPE_PAIRED 1
162 #define WORKITEM_TYPE_UNPAIRED 2
163 #define WORKITEM_TYPE_UNKNOWN 255
164
165 struct dj_workitem {
166 u8 type; /* WORKITEM_TYPE_* */
167 u8 device_index;
168 u8 device_type;
169 u8 quad_id_msb;
170 u8 quad_id_lsb;
171 u64 reports_supported;
172 };
173
174 /* Keyboard descriptor (1) */
175 static const char kbd_descriptor[] = {
176 0x05, 0x01, /* USAGE_PAGE (generic Desktop) */
177 0x09, 0x06, /* USAGE (Keyboard) */
178 0xA1, 0x01, /* COLLECTION (Application) */
179 0x85, 0x01, /* REPORT_ID (1) */
180 0x95, 0x08, /* REPORT_COUNT (8) */
181 0x75, 0x01, /* REPORT_SIZE (1) */
182 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
183 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
184 0x05, 0x07, /* USAGE_PAGE (Keyboard) */
185 0x19, 0xE0, /* USAGE_MINIMUM (Left Control) */
186 0x29, 0xE7, /* USAGE_MAXIMUM (Right GUI) */
187 0x81, 0x02, /* INPUT (Data,Var,Abs) */
188 0x95, 0x06, /* REPORT_COUNT (6) */
189 0x75, 0x08, /* REPORT_SIZE (8) */
190 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
191 0x26, 0xFF, 0x00, /* LOGICAL_MAXIMUM (255) */
192 0x05, 0x07, /* USAGE_PAGE (Keyboard) */
193 0x19, 0x00, /* USAGE_MINIMUM (no event) */
194 0x2A, 0xFF, 0x00, /* USAGE_MAXIMUM (reserved) */
195 0x81, 0x00, /* INPUT (Data,Ary,Abs) */
196 0x85, 0x0e, /* REPORT_ID (14) */
197 0x05, 0x08, /* USAGE PAGE (LED page) */
198 0x95, 0x05, /* REPORT COUNT (5) */
199 0x75, 0x01, /* REPORT SIZE (1) */
200 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
201 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
202 0x19, 0x01, /* USAGE MINIMUM (1) */
203 0x29, 0x05, /* USAGE MAXIMUM (5) */
204 0x91, 0x02, /* OUTPUT (Data, Variable, Absolute) */
205 0x95, 0x01, /* REPORT COUNT (1) */
206 0x75, 0x03, /* REPORT SIZE (3) */
207 0x91, 0x01, /* OUTPUT (Constant) */
208 0xC0
209 };
210
211 /* Mouse descriptor (2) */
212 static const char mse_descriptor[] = {
213 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
214 0x09, 0x02, /* USAGE (Mouse) */
215 0xA1, 0x01, /* COLLECTION (Application) */
216 0x85, 0x02, /* REPORT_ID = 2 */
217 0x09, 0x01, /* USAGE (pointer) */
218 0xA1, 0x00, /* COLLECTION (physical) */
219 0x05, 0x09, /* USAGE_PAGE (buttons) */
220 0x19, 0x01, /* USAGE_MIN (1) */
221 0x29, 0x10, /* USAGE_MAX (16) */
222 0x15, 0x00, /* LOGICAL_MIN (0) */
223 0x25, 0x01, /* LOGICAL_MAX (1) */
224 0x95, 0x10, /* REPORT_COUNT (16) */
225 0x75, 0x01, /* REPORT_SIZE (1) */
226 0x81, 0x02, /* INPUT (data var abs) */
227 0x05, 0x01, /* USAGE_PAGE (generic desktop) */
228 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */
229 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */
230 0x75, 0x0C, /* REPORT_SIZE (12) */
231 0x95, 0x02, /* REPORT_COUNT (2) */
232 0x09, 0x30, /* USAGE (X) */
233 0x09, 0x31, /* USAGE (Y) */
234 0x81, 0x06, /* INPUT */
235 0x15, 0x81, /* LOGICAL_MIN (-127) */
236 0x25, 0x7F, /* LOGICAL_MAX (127) */
237 0x75, 0x08, /* REPORT_SIZE (8) */
238 0x95, 0x01, /* REPORT_COUNT (1) */
239 0x09, 0x38, /* USAGE (wheel) */
240 0x81, 0x06, /* INPUT */
241 0x05, 0x0C, /* USAGE_PAGE(consumer) */
242 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */
243 0x95, 0x01, /* REPORT_COUNT (1) */
244 0x81, 0x06, /* INPUT */
245 0xC0, /* END_COLLECTION */
246 0xC0, /* END_COLLECTION */
247 };
248
249 /* Mouse descriptor (2) for 27 MHz receiver, only 8 buttons */
250 static const char mse_27mhz_descriptor[] = {
251 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
252 0x09, 0x02, /* USAGE (Mouse) */
253 0xA1, 0x01, /* COLLECTION (Application) */
254 0x85, 0x02, /* REPORT_ID = 2 */
255 0x09, 0x01, /* USAGE (pointer) */
256 0xA1, 0x00, /* COLLECTION (physical) */
257 0x05, 0x09, /* USAGE_PAGE (buttons) */
258 0x19, 0x01, /* USAGE_MIN (1) */
259 0x29, 0x08, /* USAGE_MAX (8) */
260 0x15, 0x00, /* LOGICAL_MIN (0) */
261 0x25, 0x01, /* LOGICAL_MAX (1) */
262 0x95, 0x08, /* REPORT_COUNT (8) */
263 0x75, 0x01, /* REPORT_SIZE (1) */
264 0x81, 0x02, /* INPUT (data var abs) */
265 0x05, 0x01, /* USAGE_PAGE (generic desktop) */
266 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */
267 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */
268 0x75, 0x0C, /* REPORT_SIZE (12) */
269 0x95, 0x02, /* REPORT_COUNT (2) */
270 0x09, 0x30, /* USAGE (X) */
271 0x09, 0x31, /* USAGE (Y) */
272 0x81, 0x06, /* INPUT */
273 0x15, 0x81, /* LOGICAL_MIN (-127) */
274 0x25, 0x7F, /* LOGICAL_MAX (127) */
275 0x75, 0x08, /* REPORT_SIZE (8) */
276 0x95, 0x01, /* REPORT_COUNT (1) */
277 0x09, 0x38, /* USAGE (wheel) */
278 0x81, 0x06, /* INPUT */
279 0x05, 0x0C, /* USAGE_PAGE(consumer) */
280 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */
281 0x95, 0x01, /* REPORT_COUNT (1) */
282 0x81, 0x06, /* INPUT */
283 0xC0, /* END_COLLECTION */
284 0xC0, /* END_COLLECTION */
285 };
286
287 /* Mouse descriptor (2) for Bluetooth receiver, low-res hwheel, 12 buttons */
288 static const char mse_bluetooth_descriptor[] = {
289 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
290 0x09, 0x02, /* USAGE (Mouse) */
291 0xA1, 0x01, /* COLLECTION (Application) */
292 0x85, 0x02, /* REPORT_ID = 2 */
293 0x09, 0x01, /* USAGE (pointer) */
294 0xA1, 0x00, /* COLLECTION (physical) */
295 0x05, 0x09, /* USAGE_PAGE (buttons) */
296 0x19, 0x01, /* USAGE_MIN (1) */
297 0x29, 0x08, /* USAGE_MAX (8) */
298 0x15, 0x00, /* LOGICAL_MIN (0) */
299 0x25, 0x01, /* LOGICAL_MAX (1) */
300 0x95, 0x08, /* REPORT_COUNT (8) */
301 0x75, 0x01, /* REPORT_SIZE (1) */
302 0x81, 0x02, /* INPUT (data var abs) */
303 0x05, 0x01, /* USAGE_PAGE (generic desktop) */
304 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */
305 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */
306 0x75, 0x0C, /* REPORT_SIZE (12) */
307 0x95, 0x02, /* REPORT_COUNT (2) */
308 0x09, 0x30, /* USAGE (X) */
309 0x09, 0x31, /* USAGE (Y) */
310 0x81, 0x06, /* INPUT */
311 0x15, 0x81, /* LOGICAL_MIN (-127) */
312 0x25, 0x7F, /* LOGICAL_MAX (127) */
313 0x75, 0x08, /* REPORT_SIZE (8) */
314 0x95, 0x01, /* REPORT_COUNT (1) */
315 0x09, 0x38, /* USAGE (wheel) */
316 0x81, 0x06, /* INPUT */
317 0x05, 0x0C, /* USAGE_PAGE(consumer) */
318 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */
319 0x15, 0xF9, /* LOGICAL_MIN (-7) */
320 0x25, 0x07, /* LOGICAL_MAX (7) */
321 0x75, 0x04, /* REPORT_SIZE (4) */
322 0x95, 0x01, /* REPORT_COUNT (1) */
323 0x81, 0x06, /* INPUT */
324 0x05, 0x09, /* USAGE_PAGE (buttons) */
325 0x19, 0x09, /* USAGE_MIN (9) */
326 0x29, 0x0C, /* USAGE_MAX (12) */
327 0x15, 0x00, /* LOGICAL_MIN (0) */
328 0x25, 0x01, /* LOGICAL_MAX (1) */
329 0x75, 0x01, /* REPORT_SIZE (1) */
330 0x95, 0x04, /* REPORT_COUNT (4) */
331 0x81, 0x02, /* INPUT (Data,Var,Abs) */
332 0xC0, /* END_COLLECTION */
333 0xC0, /* END_COLLECTION */
334 };
335
336 /* Gaming Mouse descriptor (2) */
337 static const char mse_high_res_descriptor[] = {
338 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
339 0x09, 0x02, /* USAGE (Mouse) */
340 0xA1, 0x01, /* COLLECTION (Application) */
341 0x85, 0x02, /* REPORT_ID = 2 */
342 0x09, 0x01, /* USAGE (pointer) */
343 0xA1, 0x00, /* COLLECTION (physical) */
344 0x05, 0x09, /* USAGE_PAGE (buttons) */
345 0x19, 0x01, /* USAGE_MIN (1) */
346 0x29, 0x10, /* USAGE_MAX (16) */
347 0x15, 0x00, /* LOGICAL_MIN (0) */
348 0x25, 0x01, /* LOGICAL_MAX (1) */
349 0x95, 0x10, /* REPORT_COUNT (16) */
350 0x75, 0x01, /* REPORT_SIZE (1) */
351 0x81, 0x02, /* INPUT (data var abs) */
352 0x05, 0x01, /* USAGE_PAGE (generic desktop) */
353 0x16, 0x01, 0x80, /* LOGICAL_MIN (-32767) */
354 0x26, 0xFF, 0x7F, /* LOGICAL_MAX (32767) */
355 0x75, 0x10, /* REPORT_SIZE (16) */
356 0x95, 0x02, /* REPORT_COUNT (2) */
357 0x09, 0x30, /* USAGE (X) */
358 0x09, 0x31, /* USAGE (Y) */
359 0x81, 0x06, /* INPUT */
360 0x15, 0x81, /* LOGICAL_MIN (-127) */
361 0x25, 0x7F, /* LOGICAL_MAX (127) */
362 0x75, 0x08, /* REPORT_SIZE (8) */
363 0x95, 0x01, /* REPORT_COUNT (1) */
364 0x09, 0x38, /* USAGE (wheel) */
365 0x81, 0x06, /* INPUT */
366 0x05, 0x0C, /* USAGE_PAGE(consumer) */
367 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */
368 0x95, 0x01, /* REPORT_COUNT (1) */
369 0x81, 0x06, /* INPUT */
370 0xC0, /* END_COLLECTION */
371 0xC0, /* END_COLLECTION */
372 };
373
374 /* Consumer Control descriptor (3) */
375 static const char consumer_descriptor[] = {
376 0x05, 0x0C, /* USAGE_PAGE (Consumer Devices) */
377 0x09, 0x01, /* USAGE (Consumer Control) */
378 0xA1, 0x01, /* COLLECTION (Application) */
379 0x85, 0x03, /* REPORT_ID = 3 */
380 0x75, 0x10, /* REPORT_SIZE (16) */
381 0x95, 0x02, /* REPORT_COUNT (2) */
382 0x15, 0x01, /* LOGICAL_MIN (1) */
383 0x26, 0xFF, 0x02, /* LOGICAL_MAX (767) */
384 0x19, 0x01, /* USAGE_MIN (1) */
385 0x2A, 0xFF, 0x02, /* USAGE_MAX (767) */
386 0x81, 0x00, /* INPUT (Data Ary Abs) */
387 0xC0, /* END_COLLECTION */
388 }; /* */
389
390 /* System control descriptor (4) */
391 static const char syscontrol_descriptor[] = {
392 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
393 0x09, 0x80, /* USAGE (System Control) */
394 0xA1, 0x01, /* COLLECTION (Application) */
395 0x85, 0x04, /* REPORT_ID = 4 */
396 0x75, 0x02, /* REPORT_SIZE (2) */
397 0x95, 0x01, /* REPORT_COUNT (1) */
398 0x15, 0x01, /* LOGICAL_MIN (1) */
399 0x25, 0x03, /* LOGICAL_MAX (3) */
400 0x09, 0x82, /* USAGE (System Sleep) */
401 0x09, 0x81, /* USAGE (System Power Down) */
402 0x09, 0x83, /* USAGE (System Wake Up) */
403 0x81, 0x60, /* INPUT (Data Ary Abs NPrf Null) */
404 0x75, 0x06, /* REPORT_SIZE (6) */
405 0x81, 0x03, /* INPUT (Cnst Var Abs) */
406 0xC0, /* END_COLLECTION */
407 };
408
409 /* Media descriptor (8) */
410 static const char media_descriptor[] = {
411 0x06, 0xbc, 0xff, /* Usage Page 0xffbc */
412 0x09, 0x88, /* Usage 0x0088 */
413 0xa1, 0x01, /* BeginCollection */
414 0x85, 0x08, /* Report ID 8 */
415 0x19, 0x01, /* Usage Min 0x0001 */
416 0x29, 0xff, /* Usage Max 0x00ff */
417 0x15, 0x01, /* Logical Min 1 */
418 0x26, 0xff, 0x00, /* Logical Max 255 */
419 0x75, 0x08, /* Report Size 8 */
420 0x95, 0x01, /* Report Count 1 */
421 0x81, 0x00, /* Input */
422 0xc0, /* EndCollection */
423 }; /* */
424
425 /* HIDPP descriptor */
426 static const char hidpp_descriptor[] = {
427 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */
428 0x09, 0x01, /* Usage (Vendor Usage 1) */
429 0xa1, 0x01, /* Collection (Application) */
430 0x85, 0x10, /* Report ID (16) */
431 0x75, 0x08, /* Report Size (8) */
432 0x95, 0x06, /* Report Count (6) */
433 0x15, 0x00, /* Logical Minimum (0) */
434 0x26, 0xff, 0x00, /* Logical Maximum (255) */
435 0x09, 0x01, /* Usage (Vendor Usage 1) */
436 0x81, 0x00, /* Input (Data,Arr,Abs) */
437 0x09, 0x01, /* Usage (Vendor Usage 1) */
438 0x91, 0x00, /* Output (Data,Arr,Abs) */
439 0xc0, /* End Collection */
440 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */
441 0x09, 0x02, /* Usage (Vendor Usage 2) */
442 0xa1, 0x01, /* Collection (Application) */
443 0x85, 0x11, /* Report ID (17) */
444 0x75, 0x08, /* Report Size (8) */
445 0x95, 0x13, /* Report Count (19) */
446 0x15, 0x00, /* Logical Minimum (0) */
447 0x26, 0xff, 0x00, /* Logical Maximum (255) */
448 0x09, 0x02, /* Usage (Vendor Usage 2) */
449 0x81, 0x00, /* Input (Data,Arr,Abs) */
450 0x09, 0x02, /* Usage (Vendor Usage 2) */
451 0x91, 0x00, /* Output (Data,Arr,Abs) */
452 0xc0, /* End Collection */
453 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */
454 0x09, 0x04, /* Usage (Vendor Usage 0x04) */
455 0xa1, 0x01, /* Collection (Application) */
456 0x85, 0x20, /* Report ID (32) */
457 0x75, 0x08, /* Report Size (8) */
458 0x95, 0x0e, /* Report Count (14) */
459 0x15, 0x00, /* Logical Minimum (0) */
460 0x26, 0xff, 0x00, /* Logical Maximum (255) */
461 0x09, 0x41, /* Usage (Vendor Usage 0x41) */
462 0x81, 0x00, /* Input (Data,Arr,Abs) */
463 0x09, 0x41, /* Usage (Vendor Usage 0x41) */
464 0x91, 0x00, /* Output (Data,Arr,Abs) */
465 0x85, 0x21, /* Report ID (33) */
466 0x95, 0x1f, /* Report Count (31) */
467 0x15, 0x00, /* Logical Minimum (0) */
468 0x26, 0xff, 0x00, /* Logical Maximum (255) */
469 0x09, 0x42, /* Usage (Vendor Usage 0x42) */
470 0x81, 0x00, /* Input (Data,Arr,Abs) */
471 0x09, 0x42, /* Usage (Vendor Usage 0x42) */
472 0x91, 0x00, /* Output (Data,Arr,Abs) */
473 0xc0, /* End Collection */
474 };
475
476 /* Maximum size of all defined hid reports in bytes (including report id) */
477 #define MAX_REPORT_SIZE 8
478
479 /* Make sure all descriptors are present here */
480 #define MAX_RDESC_SIZE \
481 (sizeof(kbd_descriptor) + \
482 sizeof(mse_bluetooth_descriptor) + \
483 sizeof(consumer_descriptor) + \
484 sizeof(syscontrol_descriptor) + \
485 sizeof(media_descriptor) + \
486 sizeof(hidpp_descriptor))
487
488 /* Number of possible hid report types that can be created by this driver.
489 *
490 * Right now, RF report types have the same report types (or report id's)
491 * than the hid report created from those RF reports. In the future
492 * this doesnt have to be true.
493 *
494 * For instance, RF report type 0x01 which has a size of 8 bytes, corresponds
495 * to hid report id 0x01, this is standard keyboard. Same thing applies to mice
496 * reports and consumer control, etc. If a new RF report is created, it doesn't
497 * has to have the same report id as its corresponding hid report, so an
498 * translation may have to take place for future report types.
499 */
500 #define NUMBER_OF_HID_REPORTS 32
501 static const u8 hid_reportid_size_map[NUMBER_OF_HID_REPORTS] = {
502 [1] = 8, /* Standard keyboard */
503 [2] = 8, /* Standard mouse */
504 [3] = 5, /* Consumer control */
505 [4] = 2, /* System control */
506 [8] = 2, /* Media Center */
507 };
508
509
510 #define LOGITECH_DJ_INTERFACE_NUMBER 0x02
511
512 static struct hid_ll_driver logi_dj_ll_driver;
513
514 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev);
515 static void delayedwork_callback(struct work_struct *work);
516
517 static LIST_HEAD(dj_hdev_list);
518 static DEFINE_MUTEX(dj_hdev_list_lock);
519
520 /*
521 * dj/HID++ receivers are really a single logical entity, but for BIOS/Windows
522 * compatibility they have multiple USB interfaces. On HID++ receivers we need
523 * to listen for input reports on both interfaces. The functions below are used
524 * to create a single struct dj_receiver_dev for all interfaces belonging to
525 * a single USB-device / receiver.
526 */
527 static struct dj_receiver_dev *dj_find_receiver_dev(struct hid_device *hdev,
528 enum recvr_type type)
529 {
530 struct dj_receiver_dev *djrcv_dev;
531 char sep;
532
533 /*
534 * The bluetooth receiver contains a built-in hub and has separate
535 * USB-devices for the keyboard and mouse interfaces.
536 */
537 sep = (type == recvr_type_bluetooth) ? '.' : '/';
538
539 /* Try to find an already-probed interface from the same device */
540 list_for_each_entry(djrcv_dev, &dj_hdev_list, list) {
541 if (djrcv_dev->mouse &&
542 hid_compare_device_paths(hdev, djrcv_dev->mouse, sep)) {
543 kref_get(&djrcv_dev->kref);
544 return djrcv_dev;
545 }
546 if (djrcv_dev->keyboard &&
547 hid_compare_device_paths(hdev, djrcv_dev->keyboard, sep)) {
548 kref_get(&djrcv_dev->kref);
549 return djrcv_dev;
550 }
551 if (djrcv_dev->hidpp &&
552 hid_compare_device_paths(hdev, djrcv_dev->hidpp, sep)) {
553 kref_get(&djrcv_dev->kref);
554 return djrcv_dev;
555 }
556 }
557
558 return NULL;
559 }
560
561 static void dj_release_receiver_dev(struct kref *kref)
562 {
563 struct dj_receiver_dev *djrcv_dev = container_of(kref, struct dj_receiver_dev, kref);
564
565 list_del(&djrcv_dev->list);
566 kfifo_free(&djrcv_dev->notif_fifo);
567 kfree(djrcv_dev);
568 }
569
570 static void dj_put_receiver_dev(struct hid_device *hdev)
571 {
572 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
573
574 mutex_lock(&dj_hdev_list_lock);
575
576 if (djrcv_dev->mouse == hdev)
577 djrcv_dev->mouse = NULL;
578 if (djrcv_dev->keyboard == hdev)
579 djrcv_dev->keyboard = NULL;
580 if (djrcv_dev->hidpp == hdev)
581 djrcv_dev->hidpp = NULL;
582
583 kref_put(&djrcv_dev->kref, dj_release_receiver_dev);
584
585 mutex_unlock(&dj_hdev_list_lock);
586 }
587
588 static struct dj_receiver_dev *dj_get_receiver_dev(struct hid_device *hdev,
589 enum recvr_type type,
590 unsigned int application,
591 bool is_hidpp)
592 {
593 struct dj_receiver_dev *djrcv_dev;
594
595 mutex_lock(&dj_hdev_list_lock);
596
597 djrcv_dev = dj_find_receiver_dev(hdev, type);
598 if (!djrcv_dev) {
599 djrcv_dev = kzalloc(sizeof(*djrcv_dev), GFP_KERNEL);
600 if (!djrcv_dev)
601 goto out;
602
603 INIT_WORK(&djrcv_dev->work, delayedwork_callback);
604 spin_lock_init(&djrcv_dev->lock);
605 if (kfifo_alloc(&djrcv_dev->notif_fifo,
606 DJ_MAX_NUMBER_NOTIFS * sizeof(struct dj_workitem),
607 GFP_KERNEL)) {
608 kfree(djrcv_dev);
609 djrcv_dev = NULL;
610 goto out;
611 }
612 kref_init(&djrcv_dev->kref);
613 list_add_tail(&djrcv_dev->list, &dj_hdev_list);
614 djrcv_dev->last_query = jiffies;
615 djrcv_dev->type = type;
616 }
617
618 if (application == HID_GD_KEYBOARD)
619 djrcv_dev->keyboard = hdev;
620 if (application == HID_GD_MOUSE)
621 djrcv_dev->mouse = hdev;
622 if (is_hidpp)
623 djrcv_dev->hidpp = hdev;
624
625 hid_set_drvdata(hdev, djrcv_dev);
626 out:
627 mutex_unlock(&dj_hdev_list_lock);
628 return djrcv_dev;
629 }
630
631 static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev *djrcv_dev,
632 struct dj_workitem *workitem)
633 {
634 /* Called in delayed work context */
635 struct dj_device *dj_dev;
636 unsigned long flags;
637
638 spin_lock_irqsave(&djrcv_dev->lock, flags);
639 dj_dev = djrcv_dev->paired_dj_devices[workitem->device_index];
640 djrcv_dev->paired_dj_devices[workitem->device_index] = NULL;
641 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
642
643 if (dj_dev != NULL) {
644 hid_destroy_device(dj_dev->hdev);
645 kfree(dj_dev);
646 } else {
647 hid_err(djrcv_dev->hidpp, "%s: can't destroy a NULL device\n",
648 __func__);
649 }
650 }
651
652 static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
653 struct dj_workitem *workitem)
654 {
655 /* Called in delayed work context */
656 struct hid_device *djrcv_hdev = djrcv_dev->hidpp;
657 struct hid_device *dj_hiddev;
658 struct dj_device *dj_dev;
659 u8 device_index = workitem->device_index;
660 unsigned long flags;
661
662 /* Device index goes from 1 to 6, we need 3 bytes to store the
663 * semicolon, the index, and a null terminator
664 */
665 unsigned char tmpstr[3];
666
667 /* We are the only one ever adding a device, no need to lock */
668 if (djrcv_dev->paired_dj_devices[device_index]) {
669 /* The device is already known. No need to reallocate it. */
670 dbg_hid("%s: device is already known\n", __func__);
671 return;
672 }
673
674 dj_hiddev = hid_allocate_device();
675 if (IS_ERR(dj_hiddev)) {
676 hid_err(djrcv_hdev, "%s: hid_allocate_dev failed\n", __func__);
677 return;
678 }
679
680 dj_hiddev->ll_driver = &logi_dj_ll_driver;
681
682 dj_hiddev->dev.parent = &djrcv_hdev->dev;
683 dj_hiddev->bus = BUS_USB;
684 dj_hiddev->vendor = djrcv_hdev->vendor;
685 dj_hiddev->product = (workitem->quad_id_msb << 8) |
686 workitem->quad_id_lsb;
687 if (workitem->device_type) {
688 const char *type_str = "Device";
689
690 switch (workitem->device_type) {
691 case 0x01: type_str = "Keyboard"; break;
692 case 0x02: type_str = "Mouse"; break;
693 case 0x03: type_str = "Numpad"; break;
694 case 0x04: type_str = "Presenter"; break;
695 case 0x07: type_str = "Remote Control"; break;
696 case 0x08: type_str = "Trackball"; break;
697 case 0x09: type_str = "Touchpad"; break;
698 }
699 snprintf(dj_hiddev->name, sizeof(dj_hiddev->name),
700 "Logitech Wireless %s PID:%04x",
701 type_str, dj_hiddev->product);
702 } else {
703 snprintf(dj_hiddev->name, sizeof(dj_hiddev->name),
704 "Logitech Wireless Device PID:%04x",
705 dj_hiddev->product);
706 }
707
708 if (djrcv_dev->type == recvr_type_27mhz)
709 dj_hiddev->group = HID_GROUP_LOGITECH_27MHZ_DEVICE;
710 else
711 dj_hiddev->group = HID_GROUP_LOGITECH_DJ_DEVICE;
712
713 memcpy(dj_hiddev->phys, djrcv_hdev->phys, sizeof(djrcv_hdev->phys));
714 snprintf(tmpstr, sizeof(tmpstr), ":%d", device_index);
715 strlcat(dj_hiddev->phys, tmpstr, sizeof(dj_hiddev->phys));
716
717 dj_dev = kzalloc(sizeof(struct dj_device), GFP_KERNEL);
718
719 if (!dj_dev) {
720 hid_err(djrcv_hdev, "%s: failed allocating dj_dev\n", __func__);
721 goto dj_device_allocate_fail;
722 }
723
724 dj_dev->reports_supported = workitem->reports_supported;
725 dj_dev->hdev = dj_hiddev;
726 dj_dev->dj_receiver_dev = djrcv_dev;
727 dj_dev->device_index = device_index;
728 dj_hiddev->driver_data = dj_dev;
729
730 spin_lock_irqsave(&djrcv_dev->lock, flags);
731 djrcv_dev->paired_dj_devices[device_index] = dj_dev;
732 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
733
734 if (hid_add_device(dj_hiddev)) {
735 hid_err(djrcv_hdev, "%s: failed adding dj_device\n", __func__);
736 goto hid_add_device_fail;
737 }
738
739 return;
740
741 hid_add_device_fail:
742 spin_lock_irqsave(&djrcv_dev->lock, flags);
743 djrcv_dev->paired_dj_devices[device_index] = NULL;
744 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
745 kfree(dj_dev);
746 dj_device_allocate_fail:
747 hid_destroy_device(dj_hiddev);
748 }
749
750 static void delayedwork_callback(struct work_struct *work)
751 {
752 struct dj_receiver_dev *djrcv_dev =
753 container_of(work, struct dj_receiver_dev, work);
754
755 struct dj_workitem workitem;
756 unsigned long flags;
757 int count;
758 int retval;
759
760 dbg_hid("%s\n", __func__);
761
762 spin_lock_irqsave(&djrcv_dev->lock, flags);
763
764 /*
765 * Since we attach to multiple interfaces, we may get scheduled before
766 * we are bound to the HID++ interface, catch this.
767 */
768 if (!djrcv_dev->ready) {
769 pr_warn("%s: delayedwork queued before hidpp interface was enumerated\n",
770 __func__);
771 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
772 return;
773 }
774
775 count = kfifo_out(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
776
777 if (count != sizeof(workitem)) {
778 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
779 return;
780 }
781
782 if (!kfifo_is_empty(&djrcv_dev->notif_fifo))
783 schedule_work(&djrcv_dev->work);
784
785 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
786
787 switch (workitem.type) {
788 case WORKITEM_TYPE_PAIRED:
789 logi_dj_recv_add_djhid_device(djrcv_dev, &workitem);
790 break;
791 case WORKITEM_TYPE_UNPAIRED:
792 logi_dj_recv_destroy_djhid_device(djrcv_dev, &workitem);
793 break;
794 case WORKITEM_TYPE_UNKNOWN:
795 retval = logi_dj_recv_query_paired_devices(djrcv_dev);
796 if (retval) {
797 hid_err(djrcv_dev->hidpp, "%s: logi_dj_recv_query_paired_devices error: %d\n",
798 __func__, retval);
799 }
800 break;
801 case WORKITEM_TYPE_EMPTY:
802 dbg_hid("%s: device list is empty\n", __func__);
803 break;
804 }
805 }
806
807 /*
808 * Sometimes we receive reports for which we do not have a paired dj_device
809 * associated with the device_index or report-type to forward the report to.
810 * This means that the original "device paired" notification corresponding
811 * to the dj_device never arrived to this driver. Possible reasons for this are:
812 * 1) hid-core discards all packets coming from a device during probe().
813 * 2) if the receiver is plugged into a KVM switch then the pairing reports
814 * are only forwarded to it if the focus is on this PC.
815 * This function deals with this by re-asking the receiver for the list of
816 * connected devices in the delayed work callback.
817 * This function MUST be called with djrcv->lock held.
818 */
819 static void logi_dj_recv_queue_unknown_work(struct dj_receiver_dev *djrcv_dev)
820 {
821 struct dj_workitem workitem = { .type = WORKITEM_TYPE_UNKNOWN };
822
823 /* Rate limit queries done because of unhandled reports to 2/sec */
824 if (time_before(jiffies, djrcv_dev->last_query + HZ / 2))
825 return;
826
827 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
828 schedule_work(&djrcv_dev->work);
829 }
830
831 static void logi_dj_recv_queue_notification(struct dj_receiver_dev *djrcv_dev,
832 struct dj_report *dj_report)
833 {
834 /* We are called from atomic context (tasklet && djrcv->lock held) */
835 struct dj_workitem workitem = {
836 .device_index = dj_report->device_index,
837 };
838
839 switch (dj_report->report_type) {
840 case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
841 workitem.type = WORKITEM_TYPE_PAIRED;
842 if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] &
843 SPFUNCTION_DEVICE_LIST_EMPTY) {
844 workitem.type = WORKITEM_TYPE_EMPTY;
845 break;
846 }
847 fallthrough;
848 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
849 workitem.quad_id_msb =
850 dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB];
851 workitem.quad_id_lsb =
852 dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB];
853 workitem.reports_supported = get_unaligned_le32(
854 dj_report->report_params +
855 DEVICE_PAIRED_RF_REPORT_TYPE);
856 workitem.reports_supported |= HIDPP;
857 if (dj_report->report_type == REPORT_TYPE_NOTIF_DEVICE_UNPAIRED)
858 workitem.type = WORKITEM_TYPE_UNPAIRED;
859 break;
860 default:
861 logi_dj_recv_queue_unknown_work(djrcv_dev);
862 return;
863 }
864
865 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
866 schedule_work(&djrcv_dev->work);
867 }
868
869 /*
870 * Some quad/bluetooth keyboards have a builtin touchpad in this case we see
871 * only 1 paired device with a device_type of REPORT_TYPE_KEYBOARD. For the
872 * touchpad to work we must also forward mouse input reports to the dj_hiddev
873 * created for the keyboard (instead of forwarding them to a second paired
874 * device with a device_type of REPORT_TYPE_MOUSE as we normally would).
875 */
876 static const u16 kbd_builtin_touchpad_ids[] = {
877 0xb309, /* Dinovo Edge */
878 0xb30c, /* Dinovo Mini */
879 };
880
881 static void logi_hidpp_dev_conn_notif_equad(struct hid_device *hdev,
882 struct hidpp_event *hidpp_report,
883 struct dj_workitem *workitem)
884 {
885 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
886 int i, id;
887
888 workitem->type = WORKITEM_TYPE_PAIRED;
889 workitem->device_type = hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] &
890 HIDPP_DEVICE_TYPE_MASK;
891 workitem->quad_id_msb = hidpp_report->params[HIDPP_PARAM_EQUAD_MSB];
892 workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_EQUAD_LSB];
893 switch (workitem->device_type) {
894 case REPORT_TYPE_KEYBOARD:
895 workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA |
896 POWER_KEYS | MEDIA_CENTER |
897 HIDPP;
898 id = (workitem->quad_id_msb << 8) | workitem->quad_id_lsb;
899 for (i = 0; i < ARRAY_SIZE(kbd_builtin_touchpad_ids); i++) {
900 if (id == kbd_builtin_touchpad_ids[i]) {
901 workitem->reports_supported |= STD_MOUSE;
902 break;
903 }
904 }
905 break;
906 case REPORT_TYPE_MOUSE:
907 workitem->reports_supported |= STD_MOUSE | HIDPP;
908 if (djrcv_dev->type == recvr_type_mouse_only)
909 workitem->reports_supported |= MULTIMEDIA;
910 break;
911 }
912 }
913
914 static void logi_hidpp_dev_conn_notif_27mhz(struct hid_device *hdev,
915 struct hidpp_event *hidpp_report,
916 struct dj_workitem *workitem)
917 {
918 workitem->type = WORKITEM_TYPE_PAIRED;
919 workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID];
920 switch (hidpp_report->device_index) {
921 case 1: /* Index 1 is always a mouse */
922 case 2: /* Index 2 is always a mouse */
923 workitem->device_type = HIDPP_DEVICE_TYPE_MOUSE;
924 workitem->reports_supported |= STD_MOUSE | HIDPP;
925 break;
926 case 3: /* Index 3 is always the keyboard */
927 case 4: /* Index 4 is used for an optional separate numpad */
928 workitem->device_type = HIDPP_DEVICE_TYPE_KEYBOARD;
929 workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA |
930 POWER_KEYS | HIDPP;
931 break;
932 default:
933 hid_warn(hdev, "%s: unexpected device-index %d", __func__,
934 hidpp_report->device_index);
935 }
936 }
937
938 static void logi_hidpp_recv_queue_notif(struct hid_device *hdev,
939 struct hidpp_event *hidpp_report)
940 {
941 /* We are called from atomic context (tasklet && djrcv->lock held) */
942 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
943 const char *device_type = "UNKNOWN";
944 struct dj_workitem workitem = {
945 .type = WORKITEM_TYPE_EMPTY,
946 .device_index = hidpp_report->device_index,
947 };
948
949 switch (hidpp_report->params[HIDPP_PARAM_PROTO_TYPE]) {
950 case 0x01:
951 device_type = "Bluetooth";
952 /* Bluetooth connect packet contents is the same as (e)QUAD */
953 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
954 if (!(hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] &
955 HIDPP_MANUFACTURER_MASK)) {
956 hid_info(hdev, "Non Logitech device connected on slot %d\n",
957 hidpp_report->device_index);
958 workitem.reports_supported &= ~HIDPP;
959 }
960 break;
961 case 0x02:
962 device_type = "27 Mhz";
963 logi_hidpp_dev_conn_notif_27mhz(hdev, hidpp_report, &workitem);
964 break;
965 case 0x03:
966 device_type = "QUAD or eQUAD";
967 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
968 break;
969 case 0x04:
970 device_type = "eQUAD step 4 DJ";
971 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
972 break;
973 case 0x05:
974 device_type = "DFU Lite";
975 break;
976 case 0x06:
977 device_type = "eQUAD step 4 Lite";
978 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
979 break;
980 case 0x07:
981 device_type = "eQUAD step 4 Gaming";
982 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
983 break;
984 case 0x08:
985 device_type = "eQUAD step 4 for gamepads";
986 break;
987 case 0x0a:
988 device_type = "eQUAD nano Lite";
989 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
990 break;
991 case 0x0c:
992 device_type = "eQUAD Lightspeed 1";
993 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
994 workitem.reports_supported |= STD_KEYBOARD;
995 break;
996 case 0x0d:
997 device_type = "eQUAD Lightspeed 1_1";
998 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
999 workitem.reports_supported |= STD_KEYBOARD;
1000 break;
1001 }
1002
1003 /* custom receiver device (eg. powerplay) */
1004 if (hidpp_report->device_index == 7) {
1005 workitem.reports_supported |= HIDPP;
1006 }
1007
1008 if (workitem.type == WORKITEM_TYPE_EMPTY) {
1009 hid_warn(hdev,
1010 "unusable device of type %s (0x%02x) connected on slot %d",
1011 device_type,
1012 hidpp_report->params[HIDPP_PARAM_PROTO_TYPE],
1013 hidpp_report->device_index);
1014 return;
1015 }
1016
1017 hid_info(hdev, "device of type %s (0x%02x) connected on slot %d",
1018 device_type, hidpp_report->params[HIDPP_PARAM_PROTO_TYPE],
1019 hidpp_report->device_index);
1020
1021 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
1022 schedule_work(&djrcv_dev->work);
1023 }
1024
1025 static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev,
1026 struct dj_report *dj_report)
1027 {
1028 /* We are called from atomic context (tasklet && djrcv->lock held) */
1029 unsigned int i;
1030 u8 reportbuffer[MAX_REPORT_SIZE];
1031 struct dj_device *djdev;
1032
1033 djdev = djrcv_dev->paired_dj_devices[dj_report->device_index];
1034
1035 memset(reportbuffer, 0, sizeof(reportbuffer));
1036
1037 for (i = 0; i < NUMBER_OF_HID_REPORTS; i++) {
1038 if (djdev->reports_supported & (1 << i)) {
1039 reportbuffer[0] = i;
1040 if (hid_input_report(djdev->hdev,
1041 HID_INPUT_REPORT,
1042 reportbuffer,
1043 hid_reportid_size_map[i], 1)) {
1044 dbg_hid("hid_input_report error sending null "
1045 "report\n");
1046 }
1047 }
1048 }
1049 }
1050
1051 static void logi_dj_recv_forward_dj(struct dj_receiver_dev *djrcv_dev,
1052 struct dj_report *dj_report)
1053 {
1054 /* We are called from atomic context (tasklet && djrcv->lock held) */
1055 struct dj_device *dj_device;
1056
1057 dj_device = djrcv_dev->paired_dj_devices[dj_report->device_index];
1058
1059 if ((dj_report->report_type > ARRAY_SIZE(hid_reportid_size_map) - 1) ||
1060 (hid_reportid_size_map[dj_report->report_type] == 0)) {
1061 dbg_hid("invalid report type:%x\n", dj_report->report_type);
1062 return;
1063 }
1064
1065 if (hid_input_report(dj_device->hdev,
1066 HID_INPUT_REPORT, &dj_report->report_type,
1067 hid_reportid_size_map[dj_report->report_type], 1)) {
1068 dbg_hid("hid_input_report error\n");
1069 }
1070 }
1071
1072 static void logi_dj_recv_forward_report(struct dj_device *dj_dev, u8 *data,
1073 int size)
1074 {
1075 /* We are called from atomic context (tasklet && djrcv->lock held) */
1076 if (hid_input_report(dj_dev->hdev, HID_INPUT_REPORT, data, size, 1))
1077 dbg_hid("hid_input_report error\n");
1078 }
1079
1080 static void logi_dj_recv_forward_input_report(struct hid_device *hdev,
1081 u8 *data, int size)
1082 {
1083 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1084 struct dj_device *dj_dev;
1085 unsigned long flags;
1086 u8 report = data[0];
1087 int i;
1088
1089 if (report > REPORT_TYPE_RFREPORT_LAST) {
1090 hid_err(hdev, "Unexpected input report number %d\n", report);
1091 return;
1092 }
1093
1094 spin_lock_irqsave(&djrcv_dev->lock, flags);
1095 for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) {
1096 dj_dev = djrcv_dev->paired_dj_devices[i];
1097 if (dj_dev && (dj_dev->reports_supported & BIT(report))) {
1098 logi_dj_recv_forward_report(dj_dev, data, size);
1099 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1100 return;
1101 }
1102 }
1103
1104 logi_dj_recv_queue_unknown_work(djrcv_dev);
1105 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1106
1107 dbg_hid("No dj-devs handling input report number %d\n", report);
1108 }
1109
1110 static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev,
1111 struct dj_report *dj_report)
1112 {
1113 struct hid_device *hdev = djrcv_dev->hidpp;
1114 struct hid_report *report;
1115 struct hid_report_enum *output_report_enum;
1116 u8 *data = (u8 *)(&dj_report->device_index);
1117 unsigned int i;
1118
1119 output_report_enum = &hdev->report_enum[HID_OUTPUT_REPORT];
1120 report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT];
1121
1122 if (!report) {
1123 hid_err(hdev, "%s: unable to find dj report\n", __func__);
1124 return -ENODEV;
1125 }
1126
1127 for (i = 0; i < DJREPORT_SHORT_LENGTH - 1; i++)
1128 report->field[0]->value[i] = data[i];
1129
1130 hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
1131
1132 return 0;
1133 }
1134
1135 static int logi_dj_recv_query_hidpp_devices(struct dj_receiver_dev *djrcv_dev)
1136 {
1137 static const u8 template[] = {
1138 REPORT_ID_HIDPP_SHORT,
1139 HIDPP_RECEIVER_INDEX,
1140 HIDPP_SET_REGISTER,
1141 HIDPP_REG_CONNECTION_STATE,
1142 HIDPP_FAKE_DEVICE_ARRIVAL,
1143 0x00, 0x00
1144 };
1145 u8 *hidpp_report;
1146 int retval;
1147
1148 hidpp_report = kmemdup(template, sizeof(template), GFP_KERNEL);
1149 if (!hidpp_report)
1150 return -ENOMEM;
1151
1152 retval = hid_hw_raw_request(djrcv_dev->hidpp,
1153 REPORT_ID_HIDPP_SHORT,
1154 hidpp_report, sizeof(template),
1155 HID_OUTPUT_REPORT,
1156 HID_REQ_SET_REPORT);
1157
1158 kfree(hidpp_report);
1159 return (retval < 0) ? retval : 0;
1160 }
1161
1162 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev)
1163 {
1164 struct dj_report *dj_report;
1165 int retval;
1166
1167 djrcv_dev->last_query = jiffies;
1168
1169 if (djrcv_dev->type != recvr_type_dj)
1170 return logi_dj_recv_query_hidpp_devices(djrcv_dev);
1171
1172 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
1173 if (!dj_report)
1174 return -ENOMEM;
1175 dj_report->report_id = REPORT_ID_DJ_SHORT;
1176 dj_report->device_index = HIDPP_RECEIVER_INDEX;
1177 dj_report->report_type = REPORT_TYPE_CMD_GET_PAIRED_DEVICES;
1178 retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
1179 kfree(dj_report);
1180 return retval;
1181 }
1182
1183
1184 static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev,
1185 unsigned timeout)
1186 {
1187 struct hid_device *hdev = djrcv_dev->hidpp;
1188 struct dj_report *dj_report;
1189 u8 *buf;
1190 int retval = 0;
1191
1192 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
1193 if (!dj_report)
1194 return -ENOMEM;
1195
1196 if (djrcv_dev->type == recvr_type_dj) {
1197 dj_report->report_id = REPORT_ID_DJ_SHORT;
1198 dj_report->device_index = HIDPP_RECEIVER_INDEX;
1199 dj_report->report_type = REPORT_TYPE_CMD_SWITCH;
1200 dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F;
1201 dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] =
1202 (u8)timeout;
1203
1204 retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
1205
1206 /*
1207 * Ugly sleep to work around a USB 3.0 bug when the receiver is
1208 * still processing the "switch-to-dj" command while we send an
1209 * other command.
1210 * 50 msec should gives enough time to the receiver to be ready.
1211 */
1212 msleep(50);
1213 }
1214
1215 /*
1216 * Magical bits to set up hidpp notifications when the dj devices
1217 * are connected/disconnected.
1218 *
1219 * We can reuse dj_report because HIDPP_REPORT_SHORT_LENGTH is smaller
1220 * than DJREPORT_SHORT_LENGTH.
1221 */
1222 buf = (u8 *)dj_report;
1223
1224 memset(buf, 0, HIDPP_REPORT_SHORT_LENGTH);
1225
1226 buf[0] = REPORT_ID_HIDPP_SHORT;
1227 buf[1] = HIDPP_RECEIVER_INDEX;
1228 buf[2] = 0x80;
1229 buf[3] = 0x00;
1230 buf[4] = 0x00;
1231 buf[5] = 0x09;
1232 buf[6] = 0x00;
1233
1234 hid_hw_raw_request(hdev, REPORT_ID_HIDPP_SHORT, buf,
1235 HIDPP_REPORT_SHORT_LENGTH, HID_OUTPUT_REPORT,
1236 HID_REQ_SET_REPORT);
1237
1238 kfree(dj_report);
1239 return retval;
1240 }
1241
1242
1243 static int logi_dj_ll_open(struct hid_device *hid)
1244 {
1245 dbg_hid("%s: %s\n", __func__, hid->phys);
1246 return 0;
1247
1248 }
1249
1250 static void logi_dj_ll_close(struct hid_device *hid)
1251 {
1252 dbg_hid("%s: %s\n", __func__, hid->phys);
1253 }
1254
1255 /*
1256 * Register 0xB5 is "pairing information". It is solely intended for the
1257 * receiver, so do not overwrite the device index.
1258 */
1259 static u8 unifying_pairing_query[] = { REPORT_ID_HIDPP_SHORT,
1260 HIDPP_RECEIVER_INDEX,
1261 HIDPP_GET_LONG_REGISTER,
1262 HIDPP_REG_PAIRING_INFORMATION };
1263 static u8 unifying_pairing_answer[] = { REPORT_ID_HIDPP_LONG,
1264 HIDPP_RECEIVER_INDEX,
1265 HIDPP_GET_LONG_REGISTER,
1266 HIDPP_REG_PAIRING_INFORMATION };
1267
1268 static int logi_dj_ll_raw_request(struct hid_device *hid,
1269 unsigned char reportnum, __u8 *buf,
1270 size_t count, unsigned char report_type,
1271 int reqtype)
1272 {
1273 struct dj_device *djdev = hid->driver_data;
1274 struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev;
1275 u8 *out_buf;
1276 int ret;
1277
1278 if ((buf[0] == REPORT_ID_HIDPP_SHORT) ||
1279 (buf[0] == REPORT_ID_HIDPP_LONG) ||
1280 (buf[0] == REPORT_ID_HIDPP_VERY_LONG)) {
1281 if (count < 2)
1282 return -EINVAL;
1283
1284 /* special case where we should not overwrite
1285 * the device_index */
1286 if (count == 7 && !memcmp(buf, unifying_pairing_query,
1287 sizeof(unifying_pairing_query)))
1288 buf[4] = (buf[4] & 0xf0) | (djdev->device_index - 1);
1289 else
1290 buf[1] = djdev->device_index;
1291 return hid_hw_raw_request(djrcv_dev->hidpp, reportnum, buf,
1292 count, report_type, reqtype);
1293 }
1294
1295 if (buf[0] != REPORT_TYPE_LEDS)
1296 return -EINVAL;
1297
1298 if (djrcv_dev->type != recvr_type_dj && count >= 2) {
1299 if (!djrcv_dev->keyboard) {
1300 hid_warn(hid, "Received REPORT_TYPE_LEDS request before the keyboard interface was enumerated\n");
1301 return 0;
1302 }
1303 /* usbhid overrides the report ID and ignores the first byte */
1304 return hid_hw_raw_request(djrcv_dev->keyboard, 0, buf, count,
1305 report_type, reqtype);
1306 }
1307
1308 out_buf = kzalloc(DJREPORT_SHORT_LENGTH, GFP_ATOMIC);
1309 if (!out_buf)
1310 return -ENOMEM;
1311
1312 if (count > DJREPORT_SHORT_LENGTH - 2)
1313 count = DJREPORT_SHORT_LENGTH - 2;
1314
1315 out_buf[0] = REPORT_ID_DJ_SHORT;
1316 out_buf[1] = djdev->device_index;
1317 memcpy(out_buf + 2, buf, count);
1318
1319 ret = hid_hw_raw_request(djrcv_dev->hidpp, out_buf[0], out_buf,
1320 DJREPORT_SHORT_LENGTH, report_type, reqtype);
1321
1322 kfree(out_buf);
1323 return ret;
1324 }
1325
1326 static void rdcat(char *rdesc, unsigned int *rsize, const char *data, unsigned int size)
1327 {
1328 memcpy(rdesc + *rsize, data, size);
1329 *rsize += size;
1330 }
1331
1332 static int logi_dj_ll_parse(struct hid_device *hid)
1333 {
1334 struct dj_device *djdev = hid->driver_data;
1335 unsigned int rsize = 0;
1336 char *rdesc;
1337 int retval;
1338
1339 dbg_hid("%s\n", __func__);
1340
1341 djdev->hdev->version = 0x0111;
1342 djdev->hdev->country = 0x00;
1343
1344 rdesc = kmalloc(MAX_RDESC_SIZE, GFP_KERNEL);
1345 if (!rdesc)
1346 return -ENOMEM;
1347
1348 if (djdev->reports_supported & STD_KEYBOARD) {
1349 dbg_hid("%s: sending a kbd descriptor, reports_supported: %llx\n",
1350 __func__, djdev->reports_supported);
1351 rdcat(rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor));
1352 }
1353
1354 if (djdev->reports_supported & STD_MOUSE) {
1355 dbg_hid("%s: sending a mouse descriptor, reports_supported: %llx\n",
1356 __func__, djdev->reports_supported);
1357 if (djdev->dj_receiver_dev->type == recvr_type_gaming_hidpp ||
1358 djdev->dj_receiver_dev->type == recvr_type_mouse_only)
1359 rdcat(rdesc, &rsize, mse_high_res_descriptor,
1360 sizeof(mse_high_res_descriptor));
1361 else if (djdev->dj_receiver_dev->type == recvr_type_27mhz)
1362 rdcat(rdesc, &rsize, mse_27mhz_descriptor,
1363 sizeof(mse_27mhz_descriptor));
1364 else if (djdev->dj_receiver_dev->type == recvr_type_bluetooth)
1365 rdcat(rdesc, &rsize, mse_bluetooth_descriptor,
1366 sizeof(mse_bluetooth_descriptor));
1367 else
1368 rdcat(rdesc, &rsize, mse_descriptor,
1369 sizeof(mse_descriptor));
1370 }
1371
1372 if (djdev->reports_supported & MULTIMEDIA) {
1373 dbg_hid("%s: sending a multimedia report descriptor: %llx\n",
1374 __func__, djdev->reports_supported);
1375 rdcat(rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor));
1376 }
1377
1378 if (djdev->reports_supported & POWER_KEYS) {
1379 dbg_hid("%s: sending a power keys report descriptor: %llx\n",
1380 __func__, djdev->reports_supported);
1381 rdcat(rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor));
1382 }
1383
1384 if (djdev->reports_supported & MEDIA_CENTER) {
1385 dbg_hid("%s: sending a media center report descriptor: %llx\n",
1386 __func__, djdev->reports_supported);
1387 rdcat(rdesc, &rsize, media_descriptor, sizeof(media_descriptor));
1388 }
1389
1390 if (djdev->reports_supported & KBD_LEDS) {
1391 dbg_hid("%s: need to send kbd leds report descriptor: %llx\n",
1392 __func__, djdev->reports_supported);
1393 }
1394
1395 if (djdev->reports_supported & HIDPP) {
1396 dbg_hid("%s: sending a HID++ descriptor, reports_supported: %llx\n",
1397 __func__, djdev->reports_supported);
1398 rdcat(rdesc, &rsize, hidpp_descriptor,
1399 sizeof(hidpp_descriptor));
1400 }
1401
1402 retval = hid_parse_report(hid, rdesc, rsize);
1403 kfree(rdesc);
1404
1405 return retval;
1406 }
1407
1408 static int logi_dj_ll_start(struct hid_device *hid)
1409 {
1410 dbg_hid("%s\n", __func__);
1411 return 0;
1412 }
1413
1414 static void logi_dj_ll_stop(struct hid_device *hid)
1415 {
1416 dbg_hid("%s\n", __func__);
1417 }
1418
1419
1420 static struct hid_ll_driver logi_dj_ll_driver = {
1421 .parse = logi_dj_ll_parse,
1422 .start = logi_dj_ll_start,
1423 .stop = logi_dj_ll_stop,
1424 .open = logi_dj_ll_open,
1425 .close = logi_dj_ll_close,
1426 .raw_request = logi_dj_ll_raw_request,
1427 };
1428
1429 static int logi_dj_dj_event(struct hid_device *hdev,
1430 struct hid_report *report, u8 *data,
1431 int size)
1432 {
1433 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1434 struct dj_report *dj_report = (struct dj_report *) data;
1435 unsigned long flags;
1436
1437 /*
1438 * Here we receive all data coming from iface 2, there are 3 cases:
1439 *
1440 * 1) Data is intended for this driver i. e. data contains arrival,
1441 * departure, etc notifications, in which case we queue them for delayed
1442 * processing by the work queue. We return 1 to hid-core as no further
1443 * processing is required from it.
1444 *
1445 * 2) Data informs a connection change, if the change means rf link
1446 * loss, then we must send a null report to the upper layer to discard
1447 * potentially pressed keys that may be repeated forever by the input
1448 * layer. Return 1 to hid-core as no further processing is required.
1449 *
1450 * 3) Data is an actual input event from a paired DJ device in which
1451 * case we forward it to the correct hid device (via hid_input_report()
1452 * ) and return 1 so hid-core does not anything else with it.
1453 */
1454
1455 if ((dj_report->device_index < DJ_DEVICE_INDEX_MIN) ||
1456 (dj_report->device_index > DJ_DEVICE_INDEX_MAX)) {
1457 /*
1458 * Device index is wrong, bail out.
1459 * This driver can ignore safely the receiver notifications,
1460 * so ignore those reports too.
1461 */
1462 if (dj_report->device_index != DJ_RECEIVER_INDEX)
1463 hid_err(hdev, "%s: invalid device index:%d\n",
1464 __func__, dj_report->device_index);
1465 return false;
1466 }
1467
1468 spin_lock_irqsave(&djrcv_dev->lock, flags);
1469
1470 if (!djrcv_dev->paired_dj_devices[dj_report->device_index]) {
1471 /* received an event for an unknown device, bail out */
1472 logi_dj_recv_queue_notification(djrcv_dev, dj_report);
1473 goto out;
1474 }
1475
1476 switch (dj_report->report_type) {
1477 case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
1478 /* pairing notifications are handled above the switch */
1479 break;
1480 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
1481 logi_dj_recv_queue_notification(djrcv_dev, dj_report);
1482 break;
1483 case REPORT_TYPE_NOTIF_CONNECTION_STATUS:
1484 if (dj_report->report_params[CONNECTION_STATUS_PARAM_STATUS] ==
1485 STATUS_LINKLOSS) {
1486 logi_dj_recv_forward_null_report(djrcv_dev, dj_report);
1487 }
1488 break;
1489 default:
1490 logi_dj_recv_forward_dj(djrcv_dev, dj_report);
1491 }
1492
1493 out:
1494 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1495
1496 return true;
1497 }
1498
1499 static int logi_dj_hidpp_event(struct hid_device *hdev,
1500 struct hid_report *report, u8 *data,
1501 int size)
1502 {
1503 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1504 struct hidpp_event *hidpp_report = (struct hidpp_event *) data;
1505 struct dj_device *dj_dev;
1506 unsigned long flags;
1507 u8 device_index = hidpp_report->device_index;
1508
1509 if (device_index == HIDPP_RECEIVER_INDEX) {
1510 /* special case were the device wants to know its unifying
1511 * name */
1512 if (size == HIDPP_REPORT_LONG_LENGTH &&
1513 !memcmp(data, unifying_pairing_answer,
1514 sizeof(unifying_pairing_answer)))
1515 device_index = (data[4] & 0x0F) + 1;
1516 else
1517 return false;
1518 }
1519
1520 /*
1521 * Data is from the HID++ collection, in this case, we forward the
1522 * data to the corresponding child dj device and return 0 to hid-core
1523 * so he data also goes to the hidraw device of the receiver. This
1524 * allows a user space application to implement the full HID++ routing
1525 * via the receiver.
1526 */
1527
1528 if ((device_index < DJ_DEVICE_INDEX_MIN) ||
1529 (device_index > DJ_DEVICE_INDEX_MAX)) {
1530 /*
1531 * Device index is wrong, bail out.
1532 * This driver can ignore safely the receiver notifications,
1533 * so ignore those reports too.
1534 */
1535 hid_err(hdev, "%s: invalid device index:%d\n", __func__,
1536 hidpp_report->device_index);
1537 return false;
1538 }
1539
1540 spin_lock_irqsave(&djrcv_dev->lock, flags);
1541
1542 dj_dev = djrcv_dev->paired_dj_devices[device_index];
1543
1544 /*
1545 * With 27 MHz receivers, we do not get an explicit unpair event,
1546 * remove the old device if the user has paired a *different* device.
1547 */
1548 if (djrcv_dev->type == recvr_type_27mhz && dj_dev &&
1549 hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED &&
1550 hidpp_report->params[HIDPP_PARAM_PROTO_TYPE] == 0x02 &&
1551 hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID] !=
1552 dj_dev->hdev->product) {
1553 struct dj_workitem workitem = {
1554 .device_index = hidpp_report->device_index,
1555 .type = WORKITEM_TYPE_UNPAIRED,
1556 };
1557 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
1558 /* logi_hidpp_recv_queue_notif will queue the work */
1559 dj_dev = NULL;
1560 }
1561
1562 if (dj_dev) {
1563 logi_dj_recv_forward_report(dj_dev, data, size);
1564 } else {
1565 if (hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED)
1566 logi_hidpp_recv_queue_notif(hdev, hidpp_report);
1567 else
1568 logi_dj_recv_queue_unknown_work(djrcv_dev);
1569 }
1570
1571 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1572
1573 return false;
1574 }
1575
1576 static int logi_dj_raw_event(struct hid_device *hdev,
1577 struct hid_report *report, u8 *data,
1578 int size)
1579 {
1580 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1581 dbg_hid("%s, size:%d\n", __func__, size);
1582
1583 if (!djrcv_dev)
1584 return 0;
1585
1586 if (!hdev->report_enum[HID_INPUT_REPORT].numbered) {
1587
1588 if (djrcv_dev->unnumbered_application == HID_GD_KEYBOARD) {
1589 /*
1590 * For the keyboard, we can reuse the same report by
1591 * using the second byte which is constant in the USB
1592 * HID report descriptor.
1593 */
1594 data[1] = data[0];
1595 data[0] = REPORT_TYPE_KEYBOARD;
1596
1597 logi_dj_recv_forward_input_report(hdev, data, size);
1598
1599 /* restore previous state */
1600 data[0] = data[1];
1601 data[1] = 0;
1602 }
1603 /*
1604 * Mouse-only receivers send unnumbered mouse data. The 27 MHz
1605 * receiver uses 6 byte packets, the nano receiver 8 bytes.
1606 */
1607 if (djrcv_dev->unnumbered_application == HID_GD_MOUSE &&
1608 size <= 8) {
1609 u8 mouse_report[9];
1610
1611 /* Prepend report id */
1612 mouse_report[0] = REPORT_TYPE_MOUSE;
1613 memcpy(mouse_report + 1, data, size);
1614 logi_dj_recv_forward_input_report(hdev, mouse_report,
1615 size + 1);
1616 }
1617
1618 return false;
1619 }
1620
1621 switch (data[0]) {
1622 case REPORT_ID_DJ_SHORT:
1623 if (size != DJREPORT_SHORT_LENGTH) {
1624 hid_err(hdev, "Short DJ report bad size (%d)", size);
1625 return false;
1626 }
1627 return logi_dj_dj_event(hdev, report, data, size);
1628 case REPORT_ID_DJ_LONG:
1629 if (size != DJREPORT_LONG_LENGTH) {
1630 hid_err(hdev, "Long DJ report bad size (%d)", size);
1631 return false;
1632 }
1633 return logi_dj_dj_event(hdev, report, data, size);
1634 case REPORT_ID_HIDPP_SHORT:
1635 if (size != HIDPP_REPORT_SHORT_LENGTH) {
1636 hid_err(hdev, "Short HID++ report bad size (%d)", size);
1637 return false;
1638 }
1639 return logi_dj_hidpp_event(hdev, report, data, size);
1640 case REPORT_ID_HIDPP_LONG:
1641 if (size != HIDPP_REPORT_LONG_LENGTH) {
1642 hid_err(hdev, "Long HID++ report bad size (%d)", size);
1643 return false;
1644 }
1645 return logi_dj_hidpp_event(hdev, report, data, size);
1646 }
1647
1648 logi_dj_recv_forward_input_report(hdev, data, size);
1649
1650 return false;
1651 }
1652
1653 static int logi_dj_probe(struct hid_device *hdev,
1654 const struct hid_device_id *id)
1655 {
1656 struct hid_report_enum *rep_enum;
1657 struct hid_report *rep;
1658 struct dj_receiver_dev *djrcv_dev;
1659 struct usb_interface *intf;
1660 unsigned int no_dj_interfaces = 0;
1661 bool has_hidpp = false;
1662 unsigned long flags;
1663 int retval;
1664
1665 /*
1666 * Call to usbhid to fetch the HID descriptors of the current
1667 * interface subsequently call to the hid/hid-core to parse the
1668 * fetched descriptors.
1669 */
1670 retval = hid_parse(hdev);
1671 if (retval) {
1672 hid_err(hdev, "%s: parse failed\n", __func__);
1673 return retval;
1674 }
1675
1676 /*
1677 * Some KVMs add an extra interface for e.g. mouse emulation. If we
1678 * treat these as logitech-dj interfaces then this causes input events
1679 * reported through this extra interface to not be reported correctly.
1680 * To avoid this, we treat these as generic-hid devices.
1681 */
1682 switch (id->driver_data) {
1683 case recvr_type_dj: no_dj_interfaces = 3; break;
1684 case recvr_type_hidpp: no_dj_interfaces = 2; break;
1685 case recvr_type_gaming_hidpp: no_dj_interfaces = 3; break;
1686 case recvr_type_mouse_only: no_dj_interfaces = 2; break;
1687 case recvr_type_27mhz: no_dj_interfaces = 2; break;
1688 case recvr_type_bluetooth: no_dj_interfaces = 2; break;
1689 }
1690 if (hid_is_using_ll_driver(hdev, &usb_hid_driver)) {
1691 intf = to_usb_interface(hdev->dev.parent);
1692 if (intf && intf->altsetting->desc.bInterfaceNumber >=
1693 no_dj_interfaces) {
1694 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1695 return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1696 }
1697 }
1698
1699 rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
1700
1701 /* no input reports, bail out */
1702 if (list_empty(&rep_enum->report_list))
1703 return -ENODEV;
1704
1705 /*
1706 * Check for the HID++ application.
1707 * Note: we should theoretically check for HID++ and DJ
1708 * collections, but this will do.
1709 */
1710 list_for_each_entry(rep, &rep_enum->report_list, list) {
1711 if (rep->application == 0xff000001)
1712 has_hidpp = true;
1713 }
1714
1715 /*
1716 * Ignore interfaces without DJ/HID++ collection, they will not carry
1717 * any data, dont create any hid_device for them.
1718 */
1719 if (!has_hidpp && id->driver_data == recvr_type_dj)
1720 return -ENODEV;
1721
1722 /* get the current application attached to the node */
1723 rep = list_first_entry(&rep_enum->report_list, struct hid_report, list);
1724 djrcv_dev = dj_get_receiver_dev(hdev, id->driver_data,
1725 rep->application, has_hidpp);
1726 if (!djrcv_dev) {
1727 hid_err(hdev, "%s: dj_get_receiver_dev failed\n", __func__);
1728 return -ENOMEM;
1729 }
1730
1731 if (!rep_enum->numbered)
1732 djrcv_dev->unnumbered_application = rep->application;
1733
1734 /* Starts the usb device and connects to upper interfaces hiddev and
1735 * hidraw */
1736 retval = hid_hw_start(hdev, HID_CONNECT_HIDRAW|HID_CONNECT_HIDDEV);
1737 if (retval) {
1738 hid_err(hdev, "%s: hid_hw_start returned error\n", __func__);
1739 goto hid_hw_start_fail;
1740 }
1741
1742 if (has_hidpp) {
1743 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0);
1744 if (retval < 0) {
1745 hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n",
1746 __func__, retval);
1747 goto switch_to_dj_mode_fail;
1748 }
1749 }
1750
1751 /* This is enabling the polling urb on the IN endpoint */
1752 retval = hid_hw_open(hdev);
1753 if (retval < 0) {
1754 hid_err(hdev, "%s: hid_hw_open returned error:%d\n",
1755 __func__, retval);
1756 goto llopen_failed;
1757 }
1758
1759 /* Allow incoming packets to arrive: */
1760 hid_device_io_start(hdev);
1761
1762 if (has_hidpp) {
1763 spin_lock_irqsave(&djrcv_dev->lock, flags);
1764 djrcv_dev->ready = true;
1765 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1766 retval = logi_dj_recv_query_paired_devices(djrcv_dev);
1767 if (retval < 0) {
1768 hid_err(hdev, "%s: logi_dj_recv_query_paired_devices error:%d\n",
1769 __func__, retval);
1770 /*
1771 * This can happen with a KVM, let the probe succeed,
1772 * logi_dj_recv_queue_unknown_work will retry later.
1773 */
1774 }
1775 }
1776
1777 return 0;
1778
1779 llopen_failed:
1780 switch_to_dj_mode_fail:
1781 hid_hw_stop(hdev);
1782
1783 hid_hw_start_fail:
1784 dj_put_receiver_dev(hdev);
1785 return retval;
1786 }
1787
1788 #ifdef CONFIG_PM
1789 static int logi_dj_reset_resume(struct hid_device *hdev)
1790 {
1791 int retval;
1792 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1793
1794 if (!djrcv_dev || djrcv_dev->hidpp != hdev)
1795 return 0;
1796
1797 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0);
1798 if (retval < 0) {
1799 hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n",
1800 __func__, retval);
1801 }
1802
1803 return 0;
1804 }
1805 #endif
1806
1807 static void logi_dj_remove(struct hid_device *hdev)
1808 {
1809 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1810 struct dj_device *dj_dev;
1811 unsigned long flags;
1812 int i;
1813
1814 dbg_hid("%s\n", __func__);
1815
1816 if (!djrcv_dev)
1817 return hid_hw_stop(hdev);
1818
1819 /*
1820 * This ensures that if the work gets requeued from another
1821 * interface of the same receiver it will be a no-op.
1822 */
1823 spin_lock_irqsave(&djrcv_dev->lock, flags);
1824 djrcv_dev->ready = false;
1825 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1826
1827 cancel_work_sync(&djrcv_dev->work);
1828
1829 hid_hw_close(hdev);
1830 hid_hw_stop(hdev);
1831
1832 /*
1833 * For proper operation we need access to all interfaces, so we destroy
1834 * the paired devices when we're unbound from any interface.
1835 *
1836 * Note we may still be bound to other interfaces, sharing the same
1837 * djrcv_dev, so we need locking here.
1838 */
1839 for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) {
1840 spin_lock_irqsave(&djrcv_dev->lock, flags);
1841 dj_dev = djrcv_dev->paired_dj_devices[i];
1842 djrcv_dev->paired_dj_devices[i] = NULL;
1843 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1844 if (dj_dev != NULL) {
1845 hid_destroy_device(dj_dev->hdev);
1846 kfree(dj_dev);
1847 }
1848 }
1849
1850 dj_put_receiver_dev(hdev);
1851 }
1852
1853 static const struct hid_device_id logi_dj_receivers[] = {
1854 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1855 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER),
1856 .driver_data = recvr_type_dj},
1857 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1858 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2),
1859 .driver_data = recvr_type_dj},
1860 { /* Logitech Nano mouse only receiver */
1861 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1862 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER),
1863 .driver_data = recvr_type_mouse_only},
1864 { /* Logitech Nano (non DJ) receiver */
1865 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1866 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_2),
1867 .driver_data = recvr_type_hidpp},
1868 { /* Logitech G700(s) receiver (0xc531) */
1869 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1870 0xc531),
1871 .driver_data = recvr_type_gaming_hidpp},
1872 { /* Logitech lightspeed receiver (0xc539) */
1873 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1874 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1),
1875 .driver_data = recvr_type_gaming_hidpp},
1876 { /* Logitech lightspeed receiver (0xc53f) */
1877 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1878 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1_1),
1879 .driver_data = recvr_type_gaming_hidpp},
1880 { /* Logitech 27 MHz HID++ 1.0 receiver (0xc513) */
1881 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER),
1882 .driver_data = recvr_type_27mhz},
1883 { /* Logitech powerplay receiver (0xc53a) */
1884 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1885 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_POWERPLAY),
1886 .driver_data = recvr_type_gaming_hidpp},
1887 { /* Logitech 27 MHz HID++ 1.0 receiver (0xc517) */
1888 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1889 USB_DEVICE_ID_S510_RECEIVER_2),
1890 .driver_data = recvr_type_27mhz},
1891 { /* Logitech 27 MHz HID++ 1.0 mouse-only receiver (0xc51b) */
1892 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1893 USB_DEVICE_ID_LOGITECH_27MHZ_MOUSE_RECEIVER),
1894 .driver_data = recvr_type_27mhz},
1895 { /* Logitech MX5000 HID++ / bluetooth receiver keyboard intf. */
1896 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1897 0xc70e),
1898 .driver_data = recvr_type_bluetooth},
1899 { /* Logitech MX5000 HID++ / bluetooth receiver mouse intf. */
1900 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1901 0xc70a),
1902 .driver_data = recvr_type_bluetooth},
1903 { /* Logitech MX5500 HID++ / bluetooth receiver keyboard intf. */
1904 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1905 0xc71b),
1906 .driver_data = recvr_type_bluetooth},
1907 { /* Logitech MX5500 HID++ / bluetooth receiver mouse intf. */
1908 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1909 0xc71c),
1910 .driver_data = recvr_type_bluetooth},
1911 {}
1912 };
1913
1914 MODULE_DEVICE_TABLE(hid, logi_dj_receivers);
1915
1916 static struct hid_driver logi_djreceiver_driver = {
1917 .name = "logitech-djreceiver",
1918 .id_table = logi_dj_receivers,
1919 .probe = logi_dj_probe,
1920 .remove = logi_dj_remove,
1921 .raw_event = logi_dj_raw_event,
1922 #ifdef CONFIG_PM
1923 .reset_resume = logi_dj_reset_resume,
1924 #endif
1925 };
1926
1927 module_hid_driver(logi_djreceiver_driver);
1928
1929 MODULE_LICENSE("GPL");
1930 MODULE_AUTHOR("Logitech");
1931 MODULE_AUTHOR("Nestor Lopez Casado");
1932 MODULE_AUTHOR("nlopezcasad@logitech.com");
Linux with added FPC-III support