1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * HID driver for Logitech Unifying 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 6
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 6
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, 0x06, /* INPUT */
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 */
dj_find_receiver_dev(struct hid_device * hdev,enum recvr_type type)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
dj_release_receiver_dev(struct kref * kref)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
dj_put_receiver_dev(struct hid_device * hdev)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
dj_get_receiver_dev(struct hid_device * hdev,enum recvr_type type,unsigned int application,bool is_hidpp)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
logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev * djrcv_dev,struct dj_workitem * workitem)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
logi_dj_recv_add_djhid_device(struct dj_receiver_dev * djrcv_dev,struct dj_workitem * workitem)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 Unifying Device. Wireless 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
delayedwork_callback(struct work_struct * work)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 */
logi_dj_recv_queue_unknown_work(struct dj_receiver_dev * djrcv_dev)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 unhandeled 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
logi_dj_recv_queue_notification(struct dj_receiver_dev * djrcv_dev,struct dj_report * dj_report)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 /* fall-through */
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
logi_hidpp_dev_conn_notif_equad(struct hid_device * hdev,struct hidpp_event * hidpp_report,struct dj_workitem * workitem)869 static void logi_hidpp_dev_conn_notif_equad(struct hid_device *hdev,
870 struct hidpp_event *hidpp_report,
871 struct dj_workitem *workitem)
872 {
873 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
874
875 workitem->type = WORKITEM_TYPE_PAIRED;
876 workitem->device_type = hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] &
877 HIDPP_DEVICE_TYPE_MASK;
878 workitem->quad_id_msb = hidpp_report->params[HIDPP_PARAM_EQUAD_MSB];
879 workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_EQUAD_LSB];
880 switch (workitem->device_type) {
881 case REPORT_TYPE_KEYBOARD:
882 workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA |
883 POWER_KEYS | MEDIA_CENTER |
884 HIDPP;
885 break;
886 case REPORT_TYPE_MOUSE:
887 workitem->reports_supported |= STD_MOUSE | HIDPP;
888 if (djrcv_dev->type == recvr_type_mouse_only)
889 workitem->reports_supported |= MULTIMEDIA;
890 break;
891 }
892 }
893
logi_hidpp_dev_conn_notif_27mhz(struct hid_device * hdev,struct hidpp_event * hidpp_report,struct dj_workitem * workitem)894 static void logi_hidpp_dev_conn_notif_27mhz(struct hid_device *hdev,
895 struct hidpp_event *hidpp_report,
896 struct dj_workitem *workitem)
897 {
898 workitem->type = WORKITEM_TYPE_PAIRED;
899 workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID];
900 switch (hidpp_report->device_index) {
901 case 1: /* Index 1 is always a mouse */
902 case 2: /* Index 2 is always a mouse */
903 workitem->device_type = HIDPP_DEVICE_TYPE_MOUSE;
904 workitem->reports_supported |= STD_MOUSE | HIDPP;
905 break;
906 case 3: /* Index 3 is always the keyboard */
907 case 4: /* Index 4 is used for an optional separate numpad */
908 workitem->device_type = HIDPP_DEVICE_TYPE_KEYBOARD;
909 workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA |
910 POWER_KEYS | HIDPP;
911 break;
912 default:
913 hid_warn(hdev, "%s: unexpected device-index %d", __func__,
914 hidpp_report->device_index);
915 }
916 }
917
logi_hidpp_recv_queue_notif(struct hid_device * hdev,struct hidpp_event * hidpp_report)918 static void logi_hidpp_recv_queue_notif(struct hid_device *hdev,
919 struct hidpp_event *hidpp_report)
920 {
921 /* We are called from atomic context (tasklet && djrcv->lock held) */
922 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
923 const char *device_type = "UNKNOWN";
924 struct dj_workitem workitem = {
925 .type = WORKITEM_TYPE_EMPTY,
926 .device_index = hidpp_report->device_index,
927 };
928
929 switch (hidpp_report->params[HIDPP_PARAM_PROTO_TYPE]) {
930 case 0x01:
931 device_type = "Bluetooth";
932 /* Bluetooth connect packet contents is the same as (e)QUAD */
933 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
934 if (!(hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] &
935 HIDPP_MANUFACTURER_MASK)) {
936 hid_info(hdev, "Non Logitech device connected on slot %d\n",
937 hidpp_report->device_index);
938 workitem.reports_supported &= ~HIDPP;
939 }
940 break;
941 case 0x02:
942 device_type = "27 Mhz";
943 logi_hidpp_dev_conn_notif_27mhz(hdev, hidpp_report, &workitem);
944 break;
945 case 0x03:
946 device_type = "QUAD or eQUAD";
947 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
948 break;
949 case 0x04:
950 device_type = "eQUAD step 4 DJ";
951 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
952 break;
953 case 0x05:
954 device_type = "DFU Lite";
955 break;
956 case 0x06:
957 device_type = "eQUAD step 4 Lite";
958 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
959 break;
960 case 0x07:
961 device_type = "eQUAD step 4 Gaming";
962 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
963 break;
964 case 0x08:
965 device_type = "eQUAD step 4 for gamepads";
966 break;
967 case 0x0a:
968 device_type = "eQUAD nano Lite";
969 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
970 break;
971 case 0x0c:
972 device_type = "eQUAD Lightspeed 1";
973 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
974 workitem.reports_supported |= STD_KEYBOARD;
975 break;
976 case 0x0d:
977 device_type = "eQUAD Lightspeed 1_1";
978 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
979 workitem.reports_supported |= STD_KEYBOARD;
980 break;
981 }
982
983 if (workitem.type == WORKITEM_TYPE_EMPTY) {
984 hid_warn(hdev,
985 "unusable device of type %s (0x%02x) connected on slot %d",
986 device_type,
987 hidpp_report->params[HIDPP_PARAM_PROTO_TYPE],
988 hidpp_report->device_index);
989 return;
990 }
991
992 hid_info(hdev, "device of type %s (0x%02x) connected on slot %d",
993 device_type, hidpp_report->params[HIDPP_PARAM_PROTO_TYPE],
994 hidpp_report->device_index);
995
996 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
997 schedule_work(&djrcv_dev->work);
998 }
999
logi_dj_recv_forward_null_report(struct dj_receiver_dev * djrcv_dev,struct dj_report * dj_report)1000 static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev,
1001 struct dj_report *dj_report)
1002 {
1003 /* We are called from atomic context (tasklet && djrcv->lock held) */
1004 unsigned int i;
1005 u8 reportbuffer[MAX_REPORT_SIZE];
1006 struct dj_device *djdev;
1007
1008 djdev = djrcv_dev->paired_dj_devices[dj_report->device_index];
1009
1010 memset(reportbuffer, 0, sizeof(reportbuffer));
1011
1012 for (i = 0; i < NUMBER_OF_HID_REPORTS; i++) {
1013 if (djdev->reports_supported & (1 << i)) {
1014 reportbuffer[0] = i;
1015 if (hid_input_report(djdev->hdev,
1016 HID_INPUT_REPORT,
1017 reportbuffer,
1018 hid_reportid_size_map[i], 1)) {
1019 dbg_hid("hid_input_report error sending null "
1020 "report\n");
1021 }
1022 }
1023 }
1024 }
1025
logi_dj_recv_forward_dj(struct dj_receiver_dev * djrcv_dev,struct dj_report * dj_report)1026 static void logi_dj_recv_forward_dj(struct dj_receiver_dev *djrcv_dev,
1027 struct dj_report *dj_report)
1028 {
1029 /* We are called from atomic context (tasklet && djrcv->lock held) */
1030 struct dj_device *dj_device;
1031
1032 dj_device = djrcv_dev->paired_dj_devices[dj_report->device_index];
1033
1034 if ((dj_report->report_type > ARRAY_SIZE(hid_reportid_size_map) - 1) ||
1035 (hid_reportid_size_map[dj_report->report_type] == 0)) {
1036 dbg_hid("invalid report type:%x\n", dj_report->report_type);
1037 return;
1038 }
1039
1040 if (hid_input_report(dj_device->hdev,
1041 HID_INPUT_REPORT, &dj_report->report_type,
1042 hid_reportid_size_map[dj_report->report_type], 1)) {
1043 dbg_hid("hid_input_report error\n");
1044 }
1045 }
1046
logi_dj_recv_forward_report(struct dj_device * dj_dev,u8 * data,int size)1047 static void logi_dj_recv_forward_report(struct dj_device *dj_dev, u8 *data,
1048 int size)
1049 {
1050 /* We are called from atomic context (tasklet && djrcv->lock held) */
1051 if (hid_input_report(dj_dev->hdev, HID_INPUT_REPORT, data, size, 1))
1052 dbg_hid("hid_input_report error\n");
1053 }
1054
logi_dj_recv_forward_input_report(struct hid_device * hdev,u8 * data,int size)1055 static void logi_dj_recv_forward_input_report(struct hid_device *hdev,
1056 u8 *data, int size)
1057 {
1058 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1059 struct dj_device *dj_dev;
1060 unsigned long flags;
1061 u8 report = data[0];
1062 int i;
1063
1064 if (report > REPORT_TYPE_RFREPORT_LAST) {
1065 hid_err(hdev, "Unexpected input report number %d\n", report);
1066 return;
1067 }
1068
1069 spin_lock_irqsave(&djrcv_dev->lock, flags);
1070 for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) {
1071 dj_dev = djrcv_dev->paired_dj_devices[i];
1072 if (dj_dev && (dj_dev->reports_supported & BIT(report))) {
1073 logi_dj_recv_forward_report(dj_dev, data, size);
1074 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1075 return;
1076 }
1077 }
1078
1079 logi_dj_recv_queue_unknown_work(djrcv_dev);
1080 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1081
1082 dbg_hid("No dj-devs handling input report number %d\n", report);
1083 }
1084
logi_dj_recv_send_report(struct dj_receiver_dev * djrcv_dev,struct dj_report * dj_report)1085 static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev,
1086 struct dj_report *dj_report)
1087 {
1088 struct hid_device *hdev = djrcv_dev->hidpp;
1089 struct hid_report *report;
1090 struct hid_report_enum *output_report_enum;
1091 u8 *data = (u8 *)(&dj_report->device_index);
1092 unsigned int i;
1093
1094 output_report_enum = &hdev->report_enum[HID_OUTPUT_REPORT];
1095 report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT];
1096
1097 if (!report) {
1098 hid_err(hdev, "%s: unable to find dj report\n", __func__);
1099 return -ENODEV;
1100 }
1101
1102 for (i = 0; i < DJREPORT_SHORT_LENGTH - 1; i++)
1103 report->field[0]->value[i] = data[i];
1104
1105 hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
1106
1107 return 0;
1108 }
1109
logi_dj_recv_query_hidpp_devices(struct dj_receiver_dev * djrcv_dev)1110 static int logi_dj_recv_query_hidpp_devices(struct dj_receiver_dev *djrcv_dev)
1111 {
1112 static const u8 template[] = {
1113 REPORT_ID_HIDPP_SHORT,
1114 HIDPP_RECEIVER_INDEX,
1115 HIDPP_SET_REGISTER,
1116 HIDPP_REG_CONNECTION_STATE,
1117 HIDPP_FAKE_DEVICE_ARRIVAL,
1118 0x00, 0x00
1119 };
1120 u8 *hidpp_report;
1121 int retval;
1122
1123 hidpp_report = kmemdup(template, sizeof(template), GFP_KERNEL);
1124 if (!hidpp_report)
1125 return -ENOMEM;
1126
1127 retval = hid_hw_raw_request(djrcv_dev->hidpp,
1128 REPORT_ID_HIDPP_SHORT,
1129 hidpp_report, sizeof(template),
1130 HID_OUTPUT_REPORT,
1131 HID_REQ_SET_REPORT);
1132
1133 kfree(hidpp_report);
1134 return (retval < 0) ? retval : 0;
1135 }
1136
logi_dj_recv_query_paired_devices(struct dj_receiver_dev * djrcv_dev)1137 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev)
1138 {
1139 struct dj_report *dj_report;
1140 int retval;
1141
1142 djrcv_dev->last_query = jiffies;
1143
1144 if (djrcv_dev->type != recvr_type_dj)
1145 return logi_dj_recv_query_hidpp_devices(djrcv_dev);
1146
1147 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
1148 if (!dj_report)
1149 return -ENOMEM;
1150 dj_report->report_id = REPORT_ID_DJ_SHORT;
1151 dj_report->device_index = 0xFF;
1152 dj_report->report_type = REPORT_TYPE_CMD_GET_PAIRED_DEVICES;
1153 retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
1154 kfree(dj_report);
1155 return retval;
1156 }
1157
1158
logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev * djrcv_dev,unsigned timeout)1159 static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev,
1160 unsigned timeout)
1161 {
1162 struct hid_device *hdev = djrcv_dev->hidpp;
1163 struct dj_report *dj_report;
1164 u8 *buf;
1165 int retval = 0;
1166
1167 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
1168 if (!dj_report)
1169 return -ENOMEM;
1170
1171 if (djrcv_dev->type == recvr_type_dj) {
1172 dj_report->report_id = REPORT_ID_DJ_SHORT;
1173 dj_report->device_index = 0xFF;
1174 dj_report->report_type = REPORT_TYPE_CMD_SWITCH;
1175 dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F;
1176 dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] =
1177 (u8)timeout;
1178
1179 retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
1180
1181 /*
1182 * Ugly sleep to work around a USB 3.0 bug when the receiver is
1183 * still processing the "switch-to-dj" command while we send an
1184 * other command.
1185 * 50 msec should gives enough time to the receiver to be ready.
1186 */
1187 msleep(50);
1188 }
1189
1190 /*
1191 * Magical bits to set up hidpp notifications when the dj devices
1192 * are connected/disconnected.
1193 *
1194 * We can reuse dj_report because HIDPP_REPORT_SHORT_LENGTH is smaller
1195 * than DJREPORT_SHORT_LENGTH.
1196 */
1197 buf = (u8 *)dj_report;
1198
1199 memset(buf, 0, HIDPP_REPORT_SHORT_LENGTH);
1200
1201 buf[0] = REPORT_ID_HIDPP_SHORT;
1202 buf[1] = 0xFF;
1203 buf[2] = 0x80;
1204 buf[3] = 0x00;
1205 buf[4] = 0x00;
1206 buf[5] = 0x09;
1207 buf[6] = 0x00;
1208
1209 hid_hw_raw_request(hdev, REPORT_ID_HIDPP_SHORT, buf,
1210 HIDPP_REPORT_SHORT_LENGTH, HID_OUTPUT_REPORT,
1211 HID_REQ_SET_REPORT);
1212
1213 kfree(dj_report);
1214 return retval;
1215 }
1216
1217
logi_dj_ll_open(struct hid_device * hid)1218 static int logi_dj_ll_open(struct hid_device *hid)
1219 {
1220 dbg_hid("%s: %s\n", __func__, hid->phys);
1221 return 0;
1222
1223 }
1224
logi_dj_ll_close(struct hid_device * hid)1225 static void logi_dj_ll_close(struct hid_device *hid)
1226 {
1227 dbg_hid("%s: %s\n", __func__, hid->phys);
1228 }
1229
1230 /*
1231 * Register 0xB5 is "pairing information". It is solely intended for the
1232 * receiver, so do not overwrite the device index.
1233 */
1234 static u8 unifying_pairing_query[] = { REPORT_ID_HIDPP_SHORT,
1235 HIDPP_RECEIVER_INDEX,
1236 HIDPP_GET_LONG_REGISTER,
1237 HIDPP_REG_PAIRING_INFORMATION };
1238 static u8 unifying_pairing_answer[] = { REPORT_ID_HIDPP_LONG,
1239 HIDPP_RECEIVER_INDEX,
1240 HIDPP_GET_LONG_REGISTER,
1241 HIDPP_REG_PAIRING_INFORMATION };
1242
logi_dj_ll_raw_request(struct hid_device * hid,unsigned char reportnum,__u8 * buf,size_t count,unsigned char report_type,int reqtype)1243 static int logi_dj_ll_raw_request(struct hid_device *hid,
1244 unsigned char reportnum, __u8 *buf,
1245 size_t count, unsigned char report_type,
1246 int reqtype)
1247 {
1248 struct dj_device *djdev = hid->driver_data;
1249 struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev;
1250 u8 *out_buf;
1251 int ret;
1252
1253 if ((buf[0] == REPORT_ID_HIDPP_SHORT) ||
1254 (buf[0] == REPORT_ID_HIDPP_LONG) ||
1255 (buf[0] == REPORT_ID_HIDPP_VERY_LONG)) {
1256 if (count < 2)
1257 return -EINVAL;
1258
1259 /* special case where we should not overwrite
1260 * the device_index */
1261 if (count == 7 && !memcmp(buf, unifying_pairing_query,
1262 sizeof(unifying_pairing_query)))
1263 buf[4] = (buf[4] & 0xf0) | (djdev->device_index - 1);
1264 else
1265 buf[1] = djdev->device_index;
1266 return hid_hw_raw_request(djrcv_dev->hidpp, reportnum, buf,
1267 count, report_type, reqtype);
1268 }
1269
1270 if (buf[0] != REPORT_TYPE_LEDS)
1271 return -EINVAL;
1272
1273 if (djrcv_dev->type != recvr_type_dj && count >= 2) {
1274 if (!djrcv_dev->keyboard) {
1275 hid_warn(hid, "Received REPORT_TYPE_LEDS request before the keyboard interface was enumerated\n");
1276 return 0;
1277 }
1278 /* usbhid overrides the report ID and ignores the first byte */
1279 return hid_hw_raw_request(djrcv_dev->keyboard, 0, buf, count,
1280 report_type, reqtype);
1281 }
1282
1283 out_buf = kzalloc(DJREPORT_SHORT_LENGTH, GFP_ATOMIC);
1284 if (!out_buf)
1285 return -ENOMEM;
1286
1287 if (count > DJREPORT_SHORT_LENGTH - 2)
1288 count = DJREPORT_SHORT_LENGTH - 2;
1289
1290 out_buf[0] = REPORT_ID_DJ_SHORT;
1291 out_buf[1] = djdev->device_index;
1292 memcpy(out_buf + 2, buf, count);
1293
1294 ret = hid_hw_raw_request(djrcv_dev->hidpp, out_buf[0], out_buf,
1295 DJREPORT_SHORT_LENGTH, report_type, reqtype);
1296
1297 kfree(out_buf);
1298 return ret;
1299 }
1300
rdcat(char * rdesc,unsigned int * rsize,const char * data,unsigned int size)1301 static void rdcat(char *rdesc, unsigned int *rsize, const char *data, unsigned int size)
1302 {
1303 memcpy(rdesc + *rsize, data, size);
1304 *rsize += size;
1305 }
1306
logi_dj_ll_parse(struct hid_device * hid)1307 static int logi_dj_ll_parse(struct hid_device *hid)
1308 {
1309 struct dj_device *djdev = hid->driver_data;
1310 unsigned int rsize = 0;
1311 char *rdesc;
1312 int retval;
1313
1314 dbg_hid("%s\n", __func__);
1315
1316 djdev->hdev->version = 0x0111;
1317 djdev->hdev->country = 0x00;
1318
1319 rdesc = kmalloc(MAX_RDESC_SIZE, GFP_KERNEL);
1320 if (!rdesc)
1321 return -ENOMEM;
1322
1323 if (djdev->reports_supported & STD_KEYBOARD) {
1324 dbg_hid("%s: sending a kbd descriptor, reports_supported: %llx\n",
1325 __func__, djdev->reports_supported);
1326 rdcat(rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor));
1327 }
1328
1329 if (djdev->reports_supported & STD_MOUSE) {
1330 dbg_hid("%s: sending a mouse descriptor, reports_supported: %llx\n",
1331 __func__, djdev->reports_supported);
1332 if (djdev->dj_receiver_dev->type == recvr_type_gaming_hidpp ||
1333 djdev->dj_receiver_dev->type == recvr_type_mouse_only)
1334 rdcat(rdesc, &rsize, mse_high_res_descriptor,
1335 sizeof(mse_high_res_descriptor));
1336 else if (djdev->dj_receiver_dev->type == recvr_type_27mhz)
1337 rdcat(rdesc, &rsize, mse_27mhz_descriptor,
1338 sizeof(mse_27mhz_descriptor));
1339 else if (djdev->dj_receiver_dev->type == recvr_type_bluetooth)
1340 rdcat(rdesc, &rsize, mse_bluetooth_descriptor,
1341 sizeof(mse_bluetooth_descriptor));
1342 else
1343 rdcat(rdesc, &rsize, mse_descriptor,
1344 sizeof(mse_descriptor));
1345 }
1346
1347 if (djdev->reports_supported & MULTIMEDIA) {
1348 dbg_hid("%s: sending a multimedia report descriptor: %llx\n",
1349 __func__, djdev->reports_supported);
1350 rdcat(rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor));
1351 }
1352
1353 if (djdev->reports_supported & POWER_KEYS) {
1354 dbg_hid("%s: sending a power keys report descriptor: %llx\n",
1355 __func__, djdev->reports_supported);
1356 rdcat(rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor));
1357 }
1358
1359 if (djdev->reports_supported & MEDIA_CENTER) {
1360 dbg_hid("%s: sending a media center report descriptor: %llx\n",
1361 __func__, djdev->reports_supported);
1362 rdcat(rdesc, &rsize, media_descriptor, sizeof(media_descriptor));
1363 }
1364
1365 if (djdev->reports_supported & KBD_LEDS) {
1366 dbg_hid("%s: need to send kbd leds report descriptor: %llx\n",
1367 __func__, djdev->reports_supported);
1368 }
1369
1370 if (djdev->reports_supported & HIDPP) {
1371 rdcat(rdesc, &rsize, hidpp_descriptor,
1372 sizeof(hidpp_descriptor));
1373 }
1374
1375 retval = hid_parse_report(hid, rdesc, rsize);
1376 kfree(rdesc);
1377
1378 return retval;
1379 }
1380
logi_dj_ll_start(struct hid_device * hid)1381 static int logi_dj_ll_start(struct hid_device *hid)
1382 {
1383 dbg_hid("%s\n", __func__);
1384 return 0;
1385 }
1386
logi_dj_ll_stop(struct hid_device * hid)1387 static void logi_dj_ll_stop(struct hid_device *hid)
1388 {
1389 dbg_hid("%s\n", __func__);
1390 }
1391
1392
1393 static struct hid_ll_driver logi_dj_ll_driver = {
1394 .parse = logi_dj_ll_parse,
1395 .start = logi_dj_ll_start,
1396 .stop = logi_dj_ll_stop,
1397 .open = logi_dj_ll_open,
1398 .close = logi_dj_ll_close,
1399 .raw_request = logi_dj_ll_raw_request,
1400 };
1401
logi_dj_dj_event(struct hid_device * hdev,struct hid_report * report,u8 * data,int size)1402 static int logi_dj_dj_event(struct hid_device *hdev,
1403 struct hid_report *report, u8 *data,
1404 int size)
1405 {
1406 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1407 struct dj_report *dj_report = (struct dj_report *) data;
1408 unsigned long flags;
1409
1410 /*
1411 * Here we receive all data coming from iface 2, there are 3 cases:
1412 *
1413 * 1) Data is intended for this driver i. e. data contains arrival,
1414 * departure, etc notifications, in which case we queue them for delayed
1415 * processing by the work queue. We return 1 to hid-core as no further
1416 * processing is required from it.
1417 *
1418 * 2) Data informs a connection change, if the change means rf link
1419 * loss, then we must send a null report to the upper layer to discard
1420 * potentially pressed keys that may be repeated forever by the input
1421 * layer. Return 1 to hid-core as no further processing is required.
1422 *
1423 * 3) Data is an actual input event from a paired DJ device in which
1424 * case we forward it to the correct hid device (via hid_input_report()
1425 * ) and return 1 so hid-core does not anything else with it.
1426 */
1427
1428 if ((dj_report->device_index < DJ_DEVICE_INDEX_MIN) ||
1429 (dj_report->device_index > DJ_DEVICE_INDEX_MAX)) {
1430 /*
1431 * Device index is wrong, bail out.
1432 * This driver can ignore safely the receiver notifications,
1433 * so ignore those reports too.
1434 */
1435 if (dj_report->device_index != DJ_RECEIVER_INDEX)
1436 hid_err(hdev, "%s: invalid device index:%d\n",
1437 __func__, dj_report->device_index);
1438 return false;
1439 }
1440
1441 spin_lock_irqsave(&djrcv_dev->lock, flags);
1442
1443 if (!djrcv_dev->paired_dj_devices[dj_report->device_index]) {
1444 /* received an event for an unknown device, bail out */
1445 logi_dj_recv_queue_notification(djrcv_dev, dj_report);
1446 goto out;
1447 }
1448
1449 switch (dj_report->report_type) {
1450 case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
1451 /* pairing notifications are handled above the switch */
1452 break;
1453 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
1454 logi_dj_recv_queue_notification(djrcv_dev, dj_report);
1455 break;
1456 case REPORT_TYPE_NOTIF_CONNECTION_STATUS:
1457 if (dj_report->report_params[CONNECTION_STATUS_PARAM_STATUS] ==
1458 STATUS_LINKLOSS) {
1459 logi_dj_recv_forward_null_report(djrcv_dev, dj_report);
1460 }
1461 break;
1462 default:
1463 logi_dj_recv_forward_dj(djrcv_dev, dj_report);
1464 }
1465
1466 out:
1467 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1468
1469 return true;
1470 }
1471
logi_dj_hidpp_event(struct hid_device * hdev,struct hid_report * report,u8 * data,int size)1472 static int logi_dj_hidpp_event(struct hid_device *hdev,
1473 struct hid_report *report, u8 *data,
1474 int size)
1475 {
1476 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1477 struct hidpp_event *hidpp_report = (struct hidpp_event *) data;
1478 struct dj_device *dj_dev;
1479 unsigned long flags;
1480 u8 device_index = hidpp_report->device_index;
1481
1482 if (device_index == HIDPP_RECEIVER_INDEX) {
1483 /* special case were the device wants to know its unifying
1484 * name */
1485 if (size == HIDPP_REPORT_LONG_LENGTH &&
1486 !memcmp(data, unifying_pairing_answer,
1487 sizeof(unifying_pairing_answer)))
1488 device_index = (data[4] & 0x0F) + 1;
1489 else
1490 return false;
1491 }
1492
1493 /*
1494 * Data is from the HID++ collection, in this case, we forward the
1495 * data to the corresponding child dj device and return 0 to hid-core
1496 * so he data also goes to the hidraw device of the receiver. This
1497 * allows a user space application to implement the full HID++ routing
1498 * via the receiver.
1499 */
1500
1501 if ((device_index < DJ_DEVICE_INDEX_MIN) ||
1502 (device_index > DJ_DEVICE_INDEX_MAX)) {
1503 /*
1504 * Device index is wrong, bail out.
1505 * This driver can ignore safely the receiver notifications,
1506 * so ignore those reports too.
1507 */
1508 hid_err(hdev, "%s: invalid device index:%d\n", __func__,
1509 hidpp_report->device_index);
1510 return false;
1511 }
1512
1513 spin_lock_irqsave(&djrcv_dev->lock, flags);
1514
1515 dj_dev = djrcv_dev->paired_dj_devices[device_index];
1516
1517 /*
1518 * With 27 MHz receivers, we do not get an explicit unpair event,
1519 * remove the old device if the user has paired a *different* device.
1520 */
1521 if (djrcv_dev->type == recvr_type_27mhz && dj_dev &&
1522 hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED &&
1523 hidpp_report->params[HIDPP_PARAM_PROTO_TYPE] == 0x02 &&
1524 hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID] !=
1525 dj_dev->hdev->product) {
1526 struct dj_workitem workitem = {
1527 .device_index = hidpp_report->device_index,
1528 .type = WORKITEM_TYPE_UNPAIRED,
1529 };
1530 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
1531 /* logi_hidpp_recv_queue_notif will queue the work */
1532 dj_dev = NULL;
1533 }
1534
1535 if (dj_dev) {
1536 logi_dj_recv_forward_report(dj_dev, data, size);
1537 } else {
1538 if (hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED)
1539 logi_hidpp_recv_queue_notif(hdev, hidpp_report);
1540 else
1541 logi_dj_recv_queue_unknown_work(djrcv_dev);
1542 }
1543
1544 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1545
1546 return false;
1547 }
1548
logi_dj_raw_event(struct hid_device * hdev,struct hid_report * report,u8 * data,int size)1549 static int logi_dj_raw_event(struct hid_device *hdev,
1550 struct hid_report *report, u8 *data,
1551 int size)
1552 {
1553 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1554 dbg_hid("%s, size:%d\n", __func__, size);
1555
1556 if (!djrcv_dev)
1557 return 0;
1558
1559 if (!hdev->report_enum[HID_INPUT_REPORT].numbered) {
1560
1561 if (djrcv_dev->unnumbered_application == HID_GD_KEYBOARD) {
1562 /*
1563 * For the keyboard, we can reuse the same report by
1564 * using the second byte which is constant in the USB
1565 * HID report descriptor.
1566 */
1567 data[1] = data[0];
1568 data[0] = REPORT_TYPE_KEYBOARD;
1569
1570 logi_dj_recv_forward_input_report(hdev, data, size);
1571
1572 /* restore previous state */
1573 data[0] = data[1];
1574 data[1] = 0;
1575 }
1576 /*
1577 * Mouse-only receivers send unnumbered mouse data. The 27 MHz
1578 * receiver uses 6 byte packets, the nano receiver 8 bytes.
1579 */
1580 if (djrcv_dev->unnumbered_application == HID_GD_MOUSE &&
1581 size <= 8) {
1582 u8 mouse_report[9];
1583
1584 /* Prepend report id */
1585 mouse_report[0] = REPORT_TYPE_MOUSE;
1586 memcpy(mouse_report + 1, data, size);
1587 logi_dj_recv_forward_input_report(hdev, mouse_report,
1588 size + 1);
1589 }
1590
1591 return false;
1592 }
1593
1594 switch (data[0]) {
1595 case REPORT_ID_DJ_SHORT:
1596 if (size != DJREPORT_SHORT_LENGTH) {
1597 hid_err(hdev, "Short DJ report bad size (%d)", size);
1598 return false;
1599 }
1600 return logi_dj_dj_event(hdev, report, data, size);
1601 case REPORT_ID_DJ_LONG:
1602 if (size != DJREPORT_LONG_LENGTH) {
1603 hid_err(hdev, "Long DJ report bad size (%d)", size);
1604 return false;
1605 }
1606 return logi_dj_dj_event(hdev, report, data, size);
1607 case REPORT_ID_HIDPP_SHORT:
1608 if (size != HIDPP_REPORT_SHORT_LENGTH) {
1609 hid_err(hdev, "Short HID++ report bad size (%d)", size);
1610 return false;
1611 }
1612 return logi_dj_hidpp_event(hdev, report, data, size);
1613 case REPORT_ID_HIDPP_LONG:
1614 if (size != HIDPP_REPORT_LONG_LENGTH) {
1615 hid_err(hdev, "Long HID++ report bad size (%d)", size);
1616 return false;
1617 }
1618 return logi_dj_hidpp_event(hdev, report, data, size);
1619 }
1620
1621 logi_dj_recv_forward_input_report(hdev, data, size);
1622
1623 return false;
1624 }
1625
logi_dj_probe(struct hid_device * hdev,const struct hid_device_id * id)1626 static int logi_dj_probe(struct hid_device *hdev,
1627 const struct hid_device_id *id)
1628 {
1629 struct hid_report_enum *rep_enum;
1630 struct hid_report *rep;
1631 struct dj_receiver_dev *djrcv_dev;
1632 struct usb_interface *intf;
1633 unsigned int no_dj_interfaces = 0;
1634 bool has_hidpp = false;
1635 unsigned long flags;
1636 int retval;
1637
1638 /*
1639 * Call to usbhid to fetch the HID descriptors of the current
1640 * interface subsequently call to the hid/hid-core to parse the
1641 * fetched descriptors.
1642 */
1643 retval = hid_parse(hdev);
1644 if (retval) {
1645 hid_err(hdev, "%s: parse failed\n", __func__);
1646 return retval;
1647 }
1648
1649 /*
1650 * Some KVMs add an extra interface for e.g. mouse emulation. If we
1651 * treat these as logitech-dj interfaces then this causes input events
1652 * reported through this extra interface to not be reported correctly.
1653 * To avoid this, we treat these as generic-hid devices.
1654 */
1655 switch (id->driver_data) {
1656 case recvr_type_dj: no_dj_interfaces = 3; break;
1657 case recvr_type_hidpp: no_dj_interfaces = 2; break;
1658 case recvr_type_gaming_hidpp: no_dj_interfaces = 3; break;
1659 case recvr_type_mouse_only: no_dj_interfaces = 2; break;
1660 case recvr_type_27mhz: no_dj_interfaces = 2; break;
1661 case recvr_type_bluetooth: no_dj_interfaces = 2; break;
1662 }
1663 if (hid_is_using_ll_driver(hdev, &usb_hid_driver)) {
1664 intf = to_usb_interface(hdev->dev.parent);
1665 if (intf && intf->altsetting->desc.bInterfaceNumber >=
1666 no_dj_interfaces) {
1667 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1668 return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1669 }
1670 }
1671
1672 rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
1673
1674 /* no input reports, bail out */
1675 if (list_empty(&rep_enum->report_list))
1676 return -ENODEV;
1677
1678 /*
1679 * Check for the HID++ application.
1680 * Note: we should theoretically check for HID++ and DJ
1681 * collections, but this will do.
1682 */
1683 list_for_each_entry(rep, &rep_enum->report_list, list) {
1684 if (rep->application == 0xff000001)
1685 has_hidpp = true;
1686 }
1687
1688 /*
1689 * Ignore interfaces without DJ/HID++ collection, they will not carry
1690 * any data, dont create any hid_device for them.
1691 */
1692 if (!has_hidpp && id->driver_data == recvr_type_dj)
1693 return -ENODEV;
1694
1695 /* get the current application attached to the node */
1696 rep = list_first_entry(&rep_enum->report_list, struct hid_report, list);
1697 djrcv_dev = dj_get_receiver_dev(hdev, id->driver_data,
1698 rep->application, has_hidpp);
1699 if (!djrcv_dev) {
1700 hid_err(hdev, "%s: dj_get_receiver_dev failed\n", __func__);
1701 return -ENOMEM;
1702 }
1703
1704 if (!rep_enum->numbered)
1705 djrcv_dev->unnumbered_application = rep->application;
1706
1707 /* Starts the usb device and connects to upper interfaces hiddev and
1708 * hidraw */
1709 retval = hid_hw_start(hdev, HID_CONNECT_HIDRAW|HID_CONNECT_HIDDEV);
1710 if (retval) {
1711 hid_err(hdev, "%s: hid_hw_start returned error\n", __func__);
1712 goto hid_hw_start_fail;
1713 }
1714
1715 if (has_hidpp) {
1716 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0);
1717 if (retval < 0) {
1718 hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n",
1719 __func__, retval);
1720 goto switch_to_dj_mode_fail;
1721 }
1722 }
1723
1724 /* This is enabling the polling urb on the IN endpoint */
1725 retval = hid_hw_open(hdev);
1726 if (retval < 0) {
1727 hid_err(hdev, "%s: hid_hw_open returned error:%d\n",
1728 __func__, retval);
1729 goto llopen_failed;
1730 }
1731
1732 /* Allow incoming packets to arrive: */
1733 hid_device_io_start(hdev);
1734
1735 if (has_hidpp) {
1736 spin_lock_irqsave(&djrcv_dev->lock, flags);
1737 djrcv_dev->ready = true;
1738 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1739 retval = logi_dj_recv_query_paired_devices(djrcv_dev);
1740 if (retval < 0) {
1741 hid_err(hdev, "%s: logi_dj_recv_query_paired_devices error:%d\n",
1742 __func__, retval);
1743 /*
1744 * This can happen with a KVM, let the probe succeed,
1745 * logi_dj_recv_queue_unknown_work will retry later.
1746 */
1747 }
1748 }
1749
1750 return 0;
1751
1752 llopen_failed:
1753 switch_to_dj_mode_fail:
1754 hid_hw_stop(hdev);
1755
1756 hid_hw_start_fail:
1757 dj_put_receiver_dev(hdev);
1758 return retval;
1759 }
1760
1761 #ifdef CONFIG_PM
logi_dj_reset_resume(struct hid_device * hdev)1762 static int logi_dj_reset_resume(struct hid_device *hdev)
1763 {
1764 int retval;
1765 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1766
1767 if (!djrcv_dev || djrcv_dev->hidpp != hdev)
1768 return 0;
1769
1770 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0);
1771 if (retval < 0) {
1772 hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n",
1773 __func__, retval);
1774 }
1775
1776 return 0;
1777 }
1778 #endif
1779
logi_dj_remove(struct hid_device * hdev)1780 static void logi_dj_remove(struct hid_device *hdev)
1781 {
1782 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1783 struct dj_device *dj_dev;
1784 unsigned long flags;
1785 int i;
1786
1787 dbg_hid("%s\n", __func__);
1788
1789 if (!djrcv_dev)
1790 return hid_hw_stop(hdev);
1791
1792 /*
1793 * This ensures that if the work gets requeued from another
1794 * interface of the same receiver it will be a no-op.
1795 */
1796 spin_lock_irqsave(&djrcv_dev->lock, flags);
1797 djrcv_dev->ready = false;
1798 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1799
1800 cancel_work_sync(&djrcv_dev->work);
1801
1802 hid_hw_close(hdev);
1803 hid_hw_stop(hdev);
1804
1805 /*
1806 * For proper operation we need access to all interfaces, so we destroy
1807 * the paired devices when we're unbound from any interface.
1808 *
1809 * Note we may still be bound to other interfaces, sharing the same
1810 * djrcv_dev, so we need locking here.
1811 */
1812 for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) {
1813 spin_lock_irqsave(&djrcv_dev->lock, flags);
1814 dj_dev = djrcv_dev->paired_dj_devices[i];
1815 djrcv_dev->paired_dj_devices[i] = NULL;
1816 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1817 if (dj_dev != NULL) {
1818 hid_destroy_device(dj_dev->hdev);
1819 kfree(dj_dev);
1820 }
1821 }
1822
1823 dj_put_receiver_dev(hdev);
1824 }
1825
1826 static const struct hid_device_id logi_dj_receivers[] = {
1827 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1828 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER),
1829 .driver_data = recvr_type_dj},
1830 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1831 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2),
1832 .driver_data = recvr_type_dj},
1833 { /* Logitech Nano mouse only receiver */
1834 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1835 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER),
1836 .driver_data = recvr_type_mouse_only},
1837 { /* Logitech Nano (non DJ) receiver */
1838 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1839 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_2),
1840 .driver_data = recvr_type_hidpp},
1841 { /* Logitech G700(s) receiver (0xc531) */
1842 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1843 0xc531),
1844 .driver_data = recvr_type_gaming_hidpp},
1845 { /* Logitech lightspeed receiver (0xc539) */
1846 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1847 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1),
1848 .driver_data = recvr_type_gaming_hidpp},
1849 { /* Logitech lightspeed receiver (0xc53f) */
1850 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1851 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1_1),
1852 .driver_data = recvr_type_gaming_hidpp},
1853 { /* Logitech 27 MHz HID++ 1.0 receiver (0xc513) */
1854 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER),
1855 .driver_data = recvr_type_27mhz},
1856 { /* Logitech powerplay receiver (0xc53a) */
1857 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1858 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_POWERPLAY),
1859 .driver_data = recvr_type_gaming_hidpp},
1860 { /* Logitech 27 MHz HID++ 1.0 receiver (0xc517) */
1861 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1862 USB_DEVICE_ID_S510_RECEIVER_2),
1863 .driver_data = recvr_type_27mhz},
1864 { /* Logitech 27 MHz HID++ 1.0 mouse-only receiver (0xc51b) */
1865 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1866 USB_DEVICE_ID_LOGITECH_27MHZ_MOUSE_RECEIVER),
1867 .driver_data = recvr_type_27mhz},
1868 { /* Logitech MX5000 HID++ / bluetooth receiver keyboard intf. */
1869 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1870 0xc70e),
1871 .driver_data = recvr_type_bluetooth},
1872 { /* Logitech MX5000 HID++ / bluetooth receiver mouse intf. */
1873 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1874 0xc70a),
1875 .driver_data = recvr_type_bluetooth},
1876 { /* Logitech MX5500 HID++ / bluetooth receiver keyboard intf. */
1877 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1878 0xc71b),
1879 .driver_data = recvr_type_bluetooth},
1880 { /* Logitech MX5500 HID++ / bluetooth receiver mouse intf. */
1881 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1882 0xc71c),
1883 .driver_data = recvr_type_bluetooth},
1884 {}
1885 };
1886
1887 MODULE_DEVICE_TABLE(hid, logi_dj_receivers);
1888
1889 static struct hid_driver logi_djreceiver_driver = {
1890 .name = "logitech-djreceiver",
1891 .id_table = logi_dj_receivers,
1892 .probe = logi_dj_probe,
1893 .remove = logi_dj_remove,
1894 .raw_event = logi_dj_raw_event,
1895 #ifdef CONFIG_PM
1896 .reset_resume = logi_dj_reset_resume,
1897 #endif
1898 };
1899
1900 module_hid_driver(logi_djreceiver_driver);
1901
1902 MODULE_LICENSE("GPL");
1903 MODULE_AUTHOR("Logitech");
1904 MODULE_AUTHOR("Nestor Lopez Casado");
1905 MODULE_AUTHOR("nlopezcasad@logitech.com");
1906
