xref: /linux/drivers/hid/hid-logitech-dj.c (revision 4b660dbd9ee2059850fd30e0df420ca7a38a1856)
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 KBD_MOUSE				BIT(5)
88 #define MEDIA_CENTER				BIT(8)
89 #define KBD_LEDS				BIT(14)
90 /* Fake (bitnr > NUMBER_OF_HID_REPORTS) bit to track HID++ capability */
91 #define HIDPP					BIT_ULL(63)
92 
93 /* HID++ Device Connected Notification */
94 #define REPORT_TYPE_NOTIF_DEVICE_CONNECTED	0x41
95 #define HIDPP_PARAM_PROTO_TYPE			0x00
96 #define HIDPP_PARAM_DEVICE_INFO			0x01
97 #define HIDPP_PARAM_EQUAD_LSB			0x02
98 #define HIDPP_PARAM_EQUAD_MSB			0x03
99 #define HIDPP_PARAM_27MHZ_DEVID			0x03
100 #define HIDPP_DEVICE_TYPE_MASK			GENMASK(3, 0)
101 #define HIDPP_LINK_STATUS_MASK			BIT(6)
102 #define HIDPP_MANUFACTURER_MASK			BIT(7)
103 #define HIDPP_27MHZ_SECURE_MASK			BIT(7)
104 
105 #define HIDPP_DEVICE_TYPE_KEYBOARD		1
106 #define HIDPP_DEVICE_TYPE_MOUSE			2
107 
108 #define HIDPP_SET_REGISTER			0x80
109 #define HIDPP_GET_LONG_REGISTER			0x83
110 #define HIDPP_REG_CONNECTION_STATE		0x02
111 #define HIDPP_REG_PAIRING_INFORMATION		0xB5
112 #define HIDPP_PAIRING_INFORMATION		0x20
113 #define HIDPP_FAKE_DEVICE_ARRIVAL		0x02
114 
115 enum recvr_type {
116 	recvr_type_dj,
117 	recvr_type_hidpp,
118 	recvr_type_gaming_hidpp,
119 	recvr_type_mouse_only,
120 	recvr_type_27mhz,
121 	recvr_type_bluetooth,
122 	recvr_type_dinovo,
123 };
124 
125 struct dj_report {
126 	u8 report_id;
127 	u8 device_index;
128 	u8 report_type;
129 	u8 report_params[DJREPORT_SHORT_LENGTH - 3];
130 };
131 
132 struct hidpp_event {
133 	u8 report_id;
134 	u8 device_index;
135 	u8 sub_id;
136 	u8 params[HIDPP_REPORT_LONG_LENGTH - 3U];
137 } __packed;
138 
139 struct dj_receiver_dev {
140 	struct hid_device *mouse;
141 	struct hid_device *keyboard;
142 	struct hid_device *hidpp;
143 	struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES +
144 					    DJ_DEVICE_INDEX_MIN];
145 	struct list_head list;
146 	struct kref kref;
147 	struct work_struct work;
148 	struct kfifo notif_fifo;
149 	unsigned long last_query; /* in jiffies */
150 	bool ready;
151 	enum recvr_type type;
152 	unsigned int unnumbered_application;
153 	spinlock_t lock;
154 };
155 
156 struct dj_device {
157 	struct hid_device *hdev;
158 	struct dj_receiver_dev *dj_receiver_dev;
159 	u64 reports_supported;
160 	u8 device_index;
161 };
162 
163 #define WORKITEM_TYPE_EMPTY	0
164 #define WORKITEM_TYPE_PAIRED	1
165 #define WORKITEM_TYPE_UNPAIRED	2
166 #define WORKITEM_TYPE_UNKNOWN	255
167 
168 struct dj_workitem {
169 	u8 type;		/* WORKITEM_TYPE_* */
170 	u8 device_index;
171 	u8 device_type;
172 	u8 quad_id_msb;
173 	u8 quad_id_lsb;
174 	u64 reports_supported;
175 };
176 
177 /* Keyboard descriptor (1) */
178 static const char kbd_descriptor[] = {
179 	0x05, 0x01,		/* USAGE_PAGE (generic Desktop)     */
180 	0x09, 0x06,		/* USAGE (Keyboard)         */
181 	0xA1, 0x01,		/* COLLECTION (Application)     */
182 	0x85, 0x01,		/* REPORT_ID (1)            */
183 	0x95, 0x08,		/*   REPORT_COUNT (8)           */
184 	0x75, 0x01,		/*   REPORT_SIZE (1)            */
185 	0x15, 0x00,		/*   LOGICAL_MINIMUM (0)        */
186 	0x25, 0x01,		/*   LOGICAL_MAXIMUM (1)        */
187 	0x05, 0x07,		/*   USAGE_PAGE (Keyboard)      */
188 	0x19, 0xE0,		/*   USAGE_MINIMUM (Left Control)   */
189 	0x29, 0xE7,		/*   USAGE_MAXIMUM (Right GUI)      */
190 	0x81, 0x02,		/*   INPUT (Data,Var,Abs)       */
191 	0x95, 0x06,		/*   REPORT_COUNT (6)           */
192 	0x75, 0x08,		/*   REPORT_SIZE (8)            */
193 	0x15, 0x00,		/*   LOGICAL_MINIMUM (0)        */
194 	0x26, 0xFF, 0x00,	/*   LOGICAL_MAXIMUM (255)      */
195 	0x05, 0x07,		/*   USAGE_PAGE (Keyboard)      */
196 	0x19, 0x00,		/*   USAGE_MINIMUM (no event)       */
197 	0x2A, 0xFF, 0x00,	/*   USAGE_MAXIMUM (reserved)       */
198 	0x81, 0x00,		/*   INPUT (Data,Ary,Abs)       */
199 	0x85, 0x0e,		/* REPORT_ID (14)               */
200 	0x05, 0x08,		/*   USAGE PAGE (LED page)      */
201 	0x95, 0x05,		/*   REPORT COUNT (5)           */
202 	0x75, 0x01,		/*   REPORT SIZE (1)            */
203 	0x15, 0x00,		/*   LOGICAL_MINIMUM (0)        */
204 	0x25, 0x01,		/*   LOGICAL_MAXIMUM (1)        */
205 	0x19, 0x01,		/*   USAGE MINIMUM (1)          */
206 	0x29, 0x05,		/*   USAGE MAXIMUM (5)          */
207 	0x91, 0x02,		/*   OUTPUT (Data, Variable, Absolute)  */
208 	0x95, 0x01,		/*   REPORT COUNT (1)           */
209 	0x75, 0x03,		/*   REPORT SIZE (3)            */
210 	0x91, 0x01,		/*   OUTPUT (Constant)          */
211 	0xC0
212 };
213 
214 /* Mouse descriptor (2)     */
215 static const char mse_descriptor[] = {
216 	0x05, 0x01,		/*  USAGE_PAGE (Generic Desktop)        */
217 	0x09, 0x02,		/*  USAGE (Mouse)                       */
218 	0xA1, 0x01,		/*  COLLECTION (Application)            */
219 	0x85, 0x02,		/*    REPORT_ID = 2                     */
220 	0x09, 0x01,		/*    USAGE (pointer)                   */
221 	0xA1, 0x00,		/*    COLLECTION (physical)             */
222 	0x05, 0x09,		/*      USAGE_PAGE (buttons)            */
223 	0x19, 0x01,		/*      USAGE_MIN (1)                   */
224 	0x29, 0x10,		/*      USAGE_MAX (16)                  */
225 	0x15, 0x00,		/*      LOGICAL_MIN (0)                 */
226 	0x25, 0x01,		/*      LOGICAL_MAX (1)                 */
227 	0x95, 0x10,		/*      REPORT_COUNT (16)               */
228 	0x75, 0x01,		/*      REPORT_SIZE (1)                 */
229 	0x81, 0x02,		/*      INPUT (data var abs)            */
230 	0x05, 0x01,		/*      USAGE_PAGE (generic desktop)    */
231 	0x16, 0x01, 0xF8,	/*      LOGICAL_MIN (-2047)             */
232 	0x26, 0xFF, 0x07,	/*      LOGICAL_MAX (2047)              */
233 	0x75, 0x0C,		/*      REPORT_SIZE (12)                */
234 	0x95, 0x02,		/*      REPORT_COUNT (2)                */
235 	0x09, 0x30,		/*      USAGE (X)                       */
236 	0x09, 0x31,		/*      USAGE (Y)                       */
237 	0x81, 0x06,		/*      INPUT                           */
238 	0x15, 0x81,		/*      LOGICAL_MIN (-127)              */
239 	0x25, 0x7F,		/*      LOGICAL_MAX (127)               */
240 	0x75, 0x08,		/*      REPORT_SIZE (8)                 */
241 	0x95, 0x01,		/*      REPORT_COUNT (1)                */
242 	0x09, 0x38,		/*      USAGE (wheel)                   */
243 	0x81, 0x06,		/*      INPUT                           */
244 	0x05, 0x0C,		/*      USAGE_PAGE(consumer)            */
245 	0x0A, 0x38, 0x02,	/*      USAGE(AC Pan)                   */
246 	0x95, 0x01,		/*      REPORT_COUNT (1)                */
247 	0x81, 0x06,		/*      INPUT                           */
248 	0xC0,			/*    END_COLLECTION                    */
249 	0xC0,			/*  END_COLLECTION                      */
250 };
251 
252 /* Mouse descriptor (2) for 27 MHz receiver, only 8 buttons */
253 static const char mse_27mhz_descriptor[] = {
254 	0x05, 0x01,		/*  USAGE_PAGE (Generic Desktop)        */
255 	0x09, 0x02,		/*  USAGE (Mouse)                       */
256 	0xA1, 0x01,		/*  COLLECTION (Application)            */
257 	0x85, 0x02,		/*    REPORT_ID = 2                     */
258 	0x09, 0x01,		/*    USAGE (pointer)                   */
259 	0xA1, 0x00,		/*    COLLECTION (physical)             */
260 	0x05, 0x09,		/*      USAGE_PAGE (buttons)            */
261 	0x19, 0x01,		/*      USAGE_MIN (1)                   */
262 	0x29, 0x08,		/*      USAGE_MAX (8)                   */
263 	0x15, 0x00,		/*      LOGICAL_MIN (0)                 */
264 	0x25, 0x01,		/*      LOGICAL_MAX (1)                 */
265 	0x95, 0x08,		/*      REPORT_COUNT (8)                */
266 	0x75, 0x01,		/*      REPORT_SIZE (1)                 */
267 	0x81, 0x02,		/*      INPUT (data var abs)            */
268 	0x05, 0x01,		/*      USAGE_PAGE (generic desktop)    */
269 	0x16, 0x01, 0xF8,	/*      LOGICAL_MIN (-2047)             */
270 	0x26, 0xFF, 0x07,	/*      LOGICAL_MAX (2047)              */
271 	0x75, 0x0C,		/*      REPORT_SIZE (12)                */
272 	0x95, 0x02,		/*      REPORT_COUNT (2)                */
273 	0x09, 0x30,		/*      USAGE (X)                       */
274 	0x09, 0x31,		/*      USAGE (Y)                       */
275 	0x81, 0x06,		/*      INPUT                           */
276 	0x15, 0x81,		/*      LOGICAL_MIN (-127)              */
277 	0x25, 0x7F,		/*      LOGICAL_MAX (127)               */
278 	0x75, 0x08,		/*      REPORT_SIZE (8)                 */
279 	0x95, 0x01,		/*      REPORT_COUNT (1)                */
280 	0x09, 0x38,		/*      USAGE (wheel)                   */
281 	0x81, 0x06,		/*      INPUT                           */
282 	0x05, 0x0C,		/*      USAGE_PAGE(consumer)            */
283 	0x0A, 0x38, 0x02,	/*      USAGE(AC Pan)                   */
284 	0x95, 0x01,		/*      REPORT_COUNT (1)                */
285 	0x81, 0x06,		/*      INPUT                           */
286 	0xC0,			/*    END_COLLECTION                    */
287 	0xC0,			/*  END_COLLECTION                      */
288 };
289 
290 /* Mouse descriptor (2) for Bluetooth receiver, low-res hwheel, 12 buttons */
291 static const char mse_bluetooth_descriptor[] = {
292 	0x05, 0x01,		/*  USAGE_PAGE (Generic Desktop)        */
293 	0x09, 0x02,		/*  USAGE (Mouse)                       */
294 	0xA1, 0x01,		/*  COLLECTION (Application)            */
295 	0x85, 0x02,		/*    REPORT_ID = 2                     */
296 	0x09, 0x01,		/*    USAGE (pointer)                   */
297 	0xA1, 0x00,		/*    COLLECTION (physical)             */
298 	0x05, 0x09,		/*      USAGE_PAGE (buttons)            */
299 	0x19, 0x01,		/*      USAGE_MIN (1)                   */
300 	0x29, 0x08,		/*      USAGE_MAX (8)                   */
301 	0x15, 0x00,		/*      LOGICAL_MIN (0)                 */
302 	0x25, 0x01,		/*      LOGICAL_MAX (1)                 */
303 	0x95, 0x08,		/*      REPORT_COUNT (8)                */
304 	0x75, 0x01,		/*      REPORT_SIZE (1)                 */
305 	0x81, 0x02,		/*      INPUT (data var abs)            */
306 	0x05, 0x01,		/*      USAGE_PAGE (generic desktop)    */
307 	0x16, 0x01, 0xF8,	/*      LOGICAL_MIN (-2047)             */
308 	0x26, 0xFF, 0x07,	/*      LOGICAL_MAX (2047)              */
309 	0x75, 0x0C,		/*      REPORT_SIZE (12)                */
310 	0x95, 0x02,		/*      REPORT_COUNT (2)                */
311 	0x09, 0x30,		/*      USAGE (X)                       */
312 	0x09, 0x31,		/*      USAGE (Y)                       */
313 	0x81, 0x06,		/*      INPUT                           */
314 	0x15, 0x81,		/*      LOGICAL_MIN (-127)              */
315 	0x25, 0x7F,		/*      LOGICAL_MAX (127)               */
316 	0x75, 0x08,		/*      REPORT_SIZE (8)                 */
317 	0x95, 0x01,		/*      REPORT_COUNT (1)                */
318 	0x09, 0x38,		/*      USAGE (wheel)                   */
319 	0x81, 0x06,		/*      INPUT                           */
320 	0x05, 0x0C,		/*      USAGE_PAGE(consumer)            */
321 	0x0A, 0x38, 0x02,	/*      USAGE(AC Pan)                   */
322 	0x15, 0xF9,		/*      LOGICAL_MIN (-7)                */
323 	0x25, 0x07,		/*      LOGICAL_MAX (7)                 */
324 	0x75, 0x04,		/*      REPORT_SIZE (4)                 */
325 	0x95, 0x01,		/*      REPORT_COUNT (1)                */
326 	0x81, 0x06,		/*      INPUT                           */
327 	0x05, 0x09,		/*      USAGE_PAGE (buttons)            */
328 	0x19, 0x09,		/*      USAGE_MIN (9)                   */
329 	0x29, 0x0C,		/*      USAGE_MAX (12)                  */
330 	0x15, 0x00,		/*      LOGICAL_MIN (0)                 */
331 	0x25, 0x01,		/*      LOGICAL_MAX (1)                 */
332 	0x75, 0x01,		/*      REPORT_SIZE (1)                 */
333 	0x95, 0x04,		/*      REPORT_COUNT (4)                */
334 	0x81, 0x02,		/*      INPUT (Data,Var,Abs)            */
335 	0xC0,			/*    END_COLLECTION                    */
336 	0xC0,			/*  END_COLLECTION                      */
337 };
338 
339 /* Mouse descriptor (5) for Bluetooth receiver, normal-res hwheel, 8 buttons */
340 static const char mse5_bluetooth_descriptor[] = {
341 	0x05, 0x01,		/*  USAGE_PAGE (Generic Desktop)        */
342 	0x09, 0x02,		/*  Usage (Mouse)                       */
343 	0xa1, 0x01,		/*  Collection (Application)            */
344 	0x85, 0x05,		/*   Report ID (5)                      */
345 	0x09, 0x01,		/*   Usage (Pointer)                    */
346 	0xa1, 0x00,		/*   Collection (Physical)              */
347 	0x05, 0x09,		/*    Usage Page (Button)               */
348 	0x19, 0x01,		/*    Usage Minimum (1)                 */
349 	0x29, 0x08,		/*    Usage Maximum (8)                 */
350 	0x15, 0x00,		/*    Logical Minimum (0)               */
351 	0x25, 0x01,		/*    Logical Maximum (1)               */
352 	0x95, 0x08,		/*    Report Count (8)                  */
353 	0x75, 0x01,		/*    Report Size (1)                   */
354 	0x81, 0x02,		/*    Input (Data,Var,Abs)              */
355 	0x05, 0x01,		/*    Usage Page (Generic Desktop)      */
356 	0x16, 0x01, 0xf8,	/*    Logical Minimum (-2047)           */
357 	0x26, 0xff, 0x07,	/*    Logical Maximum (2047)            */
358 	0x75, 0x0c,		/*    Report Size (12)                  */
359 	0x95, 0x02,		/*    Report Count (2)                  */
360 	0x09, 0x30,		/*    Usage (X)                         */
361 	0x09, 0x31,		/*    Usage (Y)                         */
362 	0x81, 0x06,		/*    Input (Data,Var,Rel)              */
363 	0x15, 0x81,		/*    Logical Minimum (-127)            */
364 	0x25, 0x7f,		/*    Logical Maximum (127)             */
365 	0x75, 0x08,		/*    Report Size (8)                   */
366 	0x95, 0x01,		/*    Report Count (1)                  */
367 	0x09, 0x38,		/*    Usage (Wheel)                     */
368 	0x81, 0x06,		/*    Input (Data,Var,Rel)              */
369 	0x05, 0x0c,		/*    Usage Page (Consumer Devices)     */
370 	0x0a, 0x38, 0x02,	/*    Usage (AC Pan)                    */
371 	0x15, 0x81,		/*    Logical Minimum (-127)            */
372 	0x25, 0x7f,		/*    Logical Maximum (127)             */
373 	0x75, 0x08,		/*    Report Size (8)                   */
374 	0x95, 0x01,		/*    Report Count (1)                  */
375 	0x81, 0x06,		/*    Input (Data,Var,Rel)              */
376 	0xc0,			/*   End Collection                     */
377 	0xc0,			/*  End Collection                      */
378 };
379 
380 /* Gaming Mouse descriptor (2) */
381 static const char mse_high_res_descriptor[] = {
382 	0x05, 0x01,		/*  USAGE_PAGE (Generic Desktop)        */
383 	0x09, 0x02,		/*  USAGE (Mouse)                       */
384 	0xA1, 0x01,		/*  COLLECTION (Application)            */
385 	0x85, 0x02,		/*    REPORT_ID = 2                     */
386 	0x09, 0x01,		/*    USAGE (pointer)                   */
387 	0xA1, 0x00,		/*    COLLECTION (physical)             */
388 	0x05, 0x09,		/*      USAGE_PAGE (buttons)            */
389 	0x19, 0x01,		/*      USAGE_MIN (1)                   */
390 	0x29, 0x10,		/*      USAGE_MAX (16)                  */
391 	0x15, 0x00,		/*      LOGICAL_MIN (0)                 */
392 	0x25, 0x01,		/*      LOGICAL_MAX (1)                 */
393 	0x95, 0x10,		/*      REPORT_COUNT (16)               */
394 	0x75, 0x01,		/*      REPORT_SIZE (1)                 */
395 	0x81, 0x02,		/*      INPUT (data var abs)            */
396 	0x05, 0x01,		/*      USAGE_PAGE (generic desktop)    */
397 	0x16, 0x01, 0x80,	/*      LOGICAL_MIN (-32767)            */
398 	0x26, 0xFF, 0x7F,	/*      LOGICAL_MAX (32767)             */
399 	0x75, 0x10,		/*      REPORT_SIZE (16)                */
400 	0x95, 0x02,		/*      REPORT_COUNT (2)                */
401 	0x09, 0x30,		/*      USAGE (X)                       */
402 	0x09, 0x31,		/*      USAGE (Y)                       */
403 	0x81, 0x06,		/*      INPUT                           */
404 	0x15, 0x81,		/*      LOGICAL_MIN (-127)              */
405 	0x25, 0x7F,		/*      LOGICAL_MAX (127)               */
406 	0x75, 0x08,		/*      REPORT_SIZE (8)                 */
407 	0x95, 0x01,		/*      REPORT_COUNT (1)                */
408 	0x09, 0x38,		/*      USAGE (wheel)                   */
409 	0x81, 0x06,		/*      INPUT                           */
410 	0x05, 0x0C,		/*      USAGE_PAGE(consumer)            */
411 	0x0A, 0x38, 0x02,	/*      USAGE(AC Pan)                   */
412 	0x95, 0x01,		/*      REPORT_COUNT (1)                */
413 	0x81, 0x06,		/*      INPUT                           */
414 	0xC0,			/*    END_COLLECTION                    */
415 	0xC0,			/*  END_COLLECTION                      */
416 };
417 
418 /* Consumer Control descriptor (3) */
419 static const char consumer_descriptor[] = {
420 	0x05, 0x0C,		/* USAGE_PAGE (Consumer Devices)       */
421 	0x09, 0x01,		/* USAGE (Consumer Control)            */
422 	0xA1, 0x01,		/* COLLECTION (Application)            */
423 	0x85, 0x03,		/* REPORT_ID = 3                       */
424 	0x75, 0x10,		/* REPORT_SIZE (16)                    */
425 	0x95, 0x02,		/* REPORT_COUNT (2)                    */
426 	0x15, 0x01,		/* LOGICAL_MIN (1)                     */
427 	0x26, 0xFF, 0x02,	/* LOGICAL_MAX (767)                   */
428 	0x19, 0x01,		/* USAGE_MIN (1)                       */
429 	0x2A, 0xFF, 0x02,	/* USAGE_MAX (767)                     */
430 	0x81, 0x00,		/* INPUT (Data Ary Abs)                */
431 	0xC0,			/* END_COLLECTION                      */
432 };				/*                                     */
433 
434 /* System control descriptor (4) */
435 static const char syscontrol_descriptor[] = {
436 	0x05, 0x01,		/*   USAGE_PAGE (Generic Desktop)      */
437 	0x09, 0x80,		/*   USAGE (System Control)            */
438 	0xA1, 0x01,		/*   COLLECTION (Application)          */
439 	0x85, 0x04,		/*   REPORT_ID = 4                     */
440 	0x75, 0x02,		/*   REPORT_SIZE (2)                   */
441 	0x95, 0x01,		/*   REPORT_COUNT (1)                  */
442 	0x15, 0x01,		/*   LOGICAL_MIN (1)                   */
443 	0x25, 0x03,		/*   LOGICAL_MAX (3)                   */
444 	0x09, 0x82,		/*   USAGE (System Sleep)              */
445 	0x09, 0x81,		/*   USAGE (System Power Down)         */
446 	0x09, 0x83,		/*   USAGE (System Wake Up)            */
447 	0x81, 0x60,		/*   INPUT (Data Ary Abs NPrf Null)    */
448 	0x75, 0x06,		/*   REPORT_SIZE (6)                   */
449 	0x81, 0x03,		/*   INPUT (Cnst Var Abs)              */
450 	0xC0,			/*   END_COLLECTION                    */
451 };
452 
453 /* Media descriptor (8) */
454 static const char media_descriptor[] = {
455 	0x06, 0xbc, 0xff,	/* Usage Page 0xffbc                   */
456 	0x09, 0x88,		/* Usage 0x0088                        */
457 	0xa1, 0x01,		/* BeginCollection                     */
458 	0x85, 0x08,		/*   Report ID 8                       */
459 	0x19, 0x01,		/*   Usage Min 0x0001                  */
460 	0x29, 0xff,		/*   Usage Max 0x00ff                  */
461 	0x15, 0x01,		/*   Logical Min 1                     */
462 	0x26, 0xff, 0x00,	/*   Logical Max 255                   */
463 	0x75, 0x08,		/*   Report Size 8                     */
464 	0x95, 0x01,		/*   Report Count 1                    */
465 	0x81, 0x00,		/*   Input                             */
466 	0xc0,			/* EndCollection                       */
467 };				/*                                     */
468 
469 /* HIDPP descriptor */
470 static const char hidpp_descriptor[] = {
471 	0x06, 0x00, 0xff,	/* Usage Page (Vendor Defined Page 1)  */
472 	0x09, 0x01,		/* Usage (Vendor Usage 1)              */
473 	0xa1, 0x01,		/* Collection (Application)            */
474 	0x85, 0x10,		/*   Report ID (16)                    */
475 	0x75, 0x08,		/*   Report Size (8)                   */
476 	0x95, 0x06,		/*   Report Count (6)                  */
477 	0x15, 0x00,		/*   Logical Minimum (0)               */
478 	0x26, 0xff, 0x00,	/*   Logical Maximum (255)             */
479 	0x09, 0x01,		/*   Usage (Vendor Usage 1)            */
480 	0x81, 0x00,		/*   Input (Data,Arr,Abs)              */
481 	0x09, 0x01,		/*   Usage (Vendor Usage 1)            */
482 	0x91, 0x00,		/*   Output (Data,Arr,Abs)             */
483 	0xc0,			/* End Collection                      */
484 	0x06, 0x00, 0xff,	/* Usage Page (Vendor Defined Page 1)  */
485 	0x09, 0x02,		/* Usage (Vendor Usage 2)              */
486 	0xa1, 0x01,		/* Collection (Application)            */
487 	0x85, 0x11,		/*   Report ID (17)                    */
488 	0x75, 0x08,		/*   Report Size (8)                   */
489 	0x95, 0x13,		/*   Report Count (19)                 */
490 	0x15, 0x00,		/*   Logical Minimum (0)               */
491 	0x26, 0xff, 0x00,	/*   Logical Maximum (255)             */
492 	0x09, 0x02,		/*   Usage (Vendor Usage 2)            */
493 	0x81, 0x00,		/*   Input (Data,Arr,Abs)              */
494 	0x09, 0x02,		/*   Usage (Vendor Usage 2)            */
495 	0x91, 0x00,		/*   Output (Data,Arr,Abs)             */
496 	0xc0,			/* End Collection                      */
497 	0x06, 0x00, 0xff,	/* Usage Page (Vendor Defined Page 1)  */
498 	0x09, 0x04,		/* Usage (Vendor Usage 0x04)           */
499 	0xa1, 0x01,		/* Collection (Application)            */
500 	0x85, 0x20,		/*   Report ID (32)                    */
501 	0x75, 0x08,		/*   Report Size (8)                   */
502 	0x95, 0x0e,		/*   Report Count (14)                 */
503 	0x15, 0x00,		/*   Logical Minimum (0)               */
504 	0x26, 0xff, 0x00,	/*   Logical Maximum (255)             */
505 	0x09, 0x41,		/*   Usage (Vendor Usage 0x41)         */
506 	0x81, 0x00,		/*   Input (Data,Arr,Abs)              */
507 	0x09, 0x41,		/*   Usage (Vendor Usage 0x41)         */
508 	0x91, 0x00,		/*   Output (Data,Arr,Abs)             */
509 	0x85, 0x21,		/*   Report ID (33)                    */
510 	0x95, 0x1f,		/*   Report Count (31)                 */
511 	0x15, 0x00,		/*   Logical Minimum (0)               */
512 	0x26, 0xff, 0x00,	/*   Logical Maximum (255)             */
513 	0x09, 0x42,		/*   Usage (Vendor Usage 0x42)         */
514 	0x81, 0x00,		/*   Input (Data,Arr,Abs)              */
515 	0x09, 0x42,		/*   Usage (Vendor Usage 0x42)         */
516 	0x91, 0x00,		/*   Output (Data,Arr,Abs)             */
517 	0xc0,			/* End Collection                      */
518 };
519 
520 /* Maximum size of all defined hid reports in bytes (including report id) */
521 #define MAX_REPORT_SIZE 8
522 
523 /* Make sure all descriptors are present here */
524 #define MAX_RDESC_SIZE				\
525 	(sizeof(kbd_descriptor) +		\
526 	 sizeof(mse_bluetooth_descriptor) +	\
527 	 sizeof(mse5_bluetooth_descriptor) +	\
528 	 sizeof(consumer_descriptor) +		\
529 	 sizeof(syscontrol_descriptor) +	\
530 	 sizeof(media_descriptor) +	\
531 	 sizeof(hidpp_descriptor))
532 
533 /* Number of possible hid report types that can be created by this driver.
534  *
535  * Right now, RF report types have the same report types (or report id's)
536  * than the hid report created from those RF reports. In the future
537  * this doesnt have to be true.
538  *
539  * For instance, RF report type 0x01 which has a size of 8 bytes, corresponds
540  * to hid report id 0x01, this is standard keyboard. Same thing applies to mice
541  * reports and consumer control, etc. If a new RF report is created, it doesn't
542  * has to have the same report id as its corresponding hid report, so an
543  * translation may have to take place for future report types.
544  */
545 #define NUMBER_OF_HID_REPORTS 32
546 static const u8 hid_reportid_size_map[NUMBER_OF_HID_REPORTS] = {
547 	[1] = 8,		/* Standard keyboard */
548 	[2] = 8,		/* Standard mouse */
549 	[3] = 5,		/* Consumer control */
550 	[4] = 2,		/* System control */
551 	[8] = 2,		/* Media Center */
552 };
553 
554 
555 #define LOGITECH_DJ_INTERFACE_NUMBER 0x02
556 
557 static const struct hid_ll_driver logi_dj_ll_driver;
558 
559 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev);
560 static void delayedwork_callback(struct work_struct *work);
561 
562 static LIST_HEAD(dj_hdev_list);
563 static DEFINE_MUTEX(dj_hdev_list_lock);
564 
565 static bool recvr_type_is_bluetooth(enum recvr_type type)
566 {
567 	return type == recvr_type_bluetooth || type == recvr_type_dinovo;
568 }
569 
570 /*
571  * dj/HID++ receivers are really a single logical entity, but for BIOS/Windows
572  * compatibility they have multiple USB interfaces. On HID++ receivers we need
573  * to listen for input reports on both interfaces. The functions below are used
574  * to create a single struct dj_receiver_dev for all interfaces belonging to
575  * a single USB-device / receiver.
576  */
577 static struct dj_receiver_dev *dj_find_receiver_dev(struct hid_device *hdev,
578 						    enum recvr_type type)
579 {
580 	struct dj_receiver_dev *djrcv_dev;
581 	char sep;
582 
583 	/*
584 	 * The bluetooth receiver contains a built-in hub and has separate
585 	 * USB-devices for the keyboard and mouse interfaces.
586 	 */
587 	sep = recvr_type_is_bluetooth(type) ? '.' : '/';
588 
589 	/* Try to find an already-probed interface from the same device */
590 	list_for_each_entry(djrcv_dev, &dj_hdev_list, list) {
591 		if (djrcv_dev->mouse &&
592 		    hid_compare_device_paths(hdev, djrcv_dev->mouse, sep)) {
593 			kref_get(&djrcv_dev->kref);
594 			return djrcv_dev;
595 		}
596 		if (djrcv_dev->keyboard &&
597 		    hid_compare_device_paths(hdev, djrcv_dev->keyboard, sep)) {
598 			kref_get(&djrcv_dev->kref);
599 			return djrcv_dev;
600 		}
601 		if (djrcv_dev->hidpp &&
602 		    hid_compare_device_paths(hdev, djrcv_dev->hidpp, sep)) {
603 			kref_get(&djrcv_dev->kref);
604 			return djrcv_dev;
605 		}
606 	}
607 
608 	return NULL;
609 }
610 
611 static void dj_release_receiver_dev(struct kref *kref)
612 {
613 	struct dj_receiver_dev *djrcv_dev = container_of(kref, struct dj_receiver_dev, kref);
614 
615 	list_del(&djrcv_dev->list);
616 	kfifo_free(&djrcv_dev->notif_fifo);
617 	kfree(djrcv_dev);
618 }
619 
620 static void dj_put_receiver_dev(struct hid_device *hdev)
621 {
622 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
623 
624 	mutex_lock(&dj_hdev_list_lock);
625 
626 	if (djrcv_dev->mouse == hdev)
627 		djrcv_dev->mouse = NULL;
628 	if (djrcv_dev->keyboard == hdev)
629 		djrcv_dev->keyboard = NULL;
630 	if (djrcv_dev->hidpp == hdev)
631 		djrcv_dev->hidpp = NULL;
632 
633 	kref_put(&djrcv_dev->kref, dj_release_receiver_dev);
634 
635 	mutex_unlock(&dj_hdev_list_lock);
636 }
637 
638 static struct dj_receiver_dev *dj_get_receiver_dev(struct hid_device *hdev,
639 						   enum recvr_type type,
640 						   unsigned int application,
641 						   bool is_hidpp)
642 {
643 	struct dj_receiver_dev *djrcv_dev;
644 
645 	mutex_lock(&dj_hdev_list_lock);
646 
647 	djrcv_dev = dj_find_receiver_dev(hdev, type);
648 	if (!djrcv_dev) {
649 		djrcv_dev = kzalloc(sizeof(*djrcv_dev), GFP_KERNEL);
650 		if (!djrcv_dev)
651 			goto out;
652 
653 		INIT_WORK(&djrcv_dev->work, delayedwork_callback);
654 		spin_lock_init(&djrcv_dev->lock);
655 		if (kfifo_alloc(&djrcv_dev->notif_fifo,
656 			    DJ_MAX_NUMBER_NOTIFS * sizeof(struct dj_workitem),
657 			    GFP_KERNEL)) {
658 			kfree(djrcv_dev);
659 			djrcv_dev = NULL;
660 			goto out;
661 		}
662 		kref_init(&djrcv_dev->kref);
663 		list_add_tail(&djrcv_dev->list, &dj_hdev_list);
664 		djrcv_dev->last_query = jiffies;
665 		djrcv_dev->type = type;
666 	}
667 
668 	if (application == HID_GD_KEYBOARD)
669 		djrcv_dev->keyboard = hdev;
670 	if (application == HID_GD_MOUSE)
671 		djrcv_dev->mouse = hdev;
672 	if (is_hidpp)
673 		djrcv_dev->hidpp = hdev;
674 
675 	hid_set_drvdata(hdev, djrcv_dev);
676 out:
677 	mutex_unlock(&dj_hdev_list_lock);
678 	return djrcv_dev;
679 }
680 
681 static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev *djrcv_dev,
682 					      struct dj_workitem *workitem)
683 {
684 	/* Called in delayed work context */
685 	struct dj_device *dj_dev;
686 	unsigned long flags;
687 
688 	spin_lock_irqsave(&djrcv_dev->lock, flags);
689 	dj_dev = djrcv_dev->paired_dj_devices[workitem->device_index];
690 	djrcv_dev->paired_dj_devices[workitem->device_index] = NULL;
691 	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
692 
693 	if (dj_dev != NULL) {
694 		hid_destroy_device(dj_dev->hdev);
695 		kfree(dj_dev);
696 	} else {
697 		hid_err(djrcv_dev->hidpp, "%s: can't destroy a NULL device\n",
698 			__func__);
699 	}
700 }
701 
702 static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
703 					  struct dj_workitem *workitem)
704 {
705 	/* Called in delayed work context */
706 	struct hid_device *djrcv_hdev = djrcv_dev->hidpp;
707 	struct hid_device *dj_hiddev;
708 	struct dj_device *dj_dev;
709 	u8 device_index = workitem->device_index;
710 	unsigned long flags;
711 
712 	/* Device index goes from 1 to 6, we need 3 bytes to store the
713 	 * semicolon, the index, and a null terminator
714 	 */
715 	unsigned char tmpstr[3];
716 
717 	/* We are the only one ever adding a device, no need to lock */
718 	if (djrcv_dev->paired_dj_devices[device_index]) {
719 		/* The device is already known. No need to reallocate it. */
720 		dbg_hid("%s: device is already known\n", __func__);
721 		return;
722 	}
723 
724 	dj_hiddev = hid_allocate_device();
725 	if (IS_ERR(dj_hiddev)) {
726 		hid_err(djrcv_hdev, "%s: hid_allocate_dev failed\n", __func__);
727 		return;
728 	}
729 
730 	dj_hiddev->ll_driver = &logi_dj_ll_driver;
731 
732 	dj_hiddev->dev.parent = &djrcv_hdev->dev;
733 	dj_hiddev->bus = BUS_USB;
734 	dj_hiddev->vendor = djrcv_hdev->vendor;
735 	dj_hiddev->product = (workitem->quad_id_msb << 8) |
736 			      workitem->quad_id_lsb;
737 	if (workitem->device_type) {
738 		const char *type_str = "Device";
739 
740 		switch (workitem->device_type) {
741 		case 0x01: type_str = "Keyboard";	break;
742 		case 0x02: type_str = "Mouse";		break;
743 		case 0x03: type_str = "Numpad";		break;
744 		case 0x04: type_str = "Presenter";	break;
745 		case 0x07: type_str = "Remote Control";	break;
746 		case 0x08: type_str = "Trackball";	break;
747 		case 0x09: type_str = "Touchpad";	break;
748 		}
749 		snprintf(dj_hiddev->name, sizeof(dj_hiddev->name),
750 			"Logitech Wireless %s PID:%04x",
751 			type_str, dj_hiddev->product);
752 	} else {
753 		snprintf(dj_hiddev->name, sizeof(dj_hiddev->name),
754 			"Logitech Wireless Device PID:%04x",
755 			dj_hiddev->product);
756 	}
757 
758 	if (djrcv_dev->type == recvr_type_27mhz)
759 		dj_hiddev->group = HID_GROUP_LOGITECH_27MHZ_DEVICE;
760 	else
761 		dj_hiddev->group = HID_GROUP_LOGITECH_DJ_DEVICE;
762 
763 	memcpy(dj_hiddev->phys, djrcv_hdev->phys, sizeof(djrcv_hdev->phys));
764 	snprintf(tmpstr, sizeof(tmpstr), ":%d", device_index);
765 	strlcat(dj_hiddev->phys, tmpstr, sizeof(dj_hiddev->phys));
766 
767 	dj_dev = kzalloc(sizeof(struct dj_device), GFP_KERNEL);
768 
769 	if (!dj_dev) {
770 		hid_err(djrcv_hdev, "%s: failed allocating dj_dev\n", __func__);
771 		goto dj_device_allocate_fail;
772 	}
773 
774 	dj_dev->reports_supported = workitem->reports_supported;
775 	dj_dev->hdev = dj_hiddev;
776 	dj_dev->dj_receiver_dev = djrcv_dev;
777 	dj_dev->device_index = device_index;
778 	dj_hiddev->driver_data = dj_dev;
779 
780 	spin_lock_irqsave(&djrcv_dev->lock, flags);
781 	djrcv_dev->paired_dj_devices[device_index] = dj_dev;
782 	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
783 
784 	if (hid_add_device(dj_hiddev)) {
785 		hid_err(djrcv_hdev, "%s: failed adding dj_device\n", __func__);
786 		goto hid_add_device_fail;
787 	}
788 
789 	return;
790 
791 hid_add_device_fail:
792 	spin_lock_irqsave(&djrcv_dev->lock, flags);
793 	djrcv_dev->paired_dj_devices[device_index] = NULL;
794 	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
795 	kfree(dj_dev);
796 dj_device_allocate_fail:
797 	hid_destroy_device(dj_hiddev);
798 }
799 
800 static void delayedwork_callback(struct work_struct *work)
801 {
802 	struct dj_receiver_dev *djrcv_dev =
803 		container_of(work, struct dj_receiver_dev, work);
804 
805 	struct dj_workitem workitem;
806 	unsigned long flags;
807 	int count;
808 	int retval;
809 
810 	dbg_hid("%s\n", __func__);
811 
812 	spin_lock_irqsave(&djrcv_dev->lock, flags);
813 
814 	/*
815 	 * Since we attach to multiple interfaces, we may get scheduled before
816 	 * we are bound to the HID++ interface, catch this.
817 	 */
818 	if (!djrcv_dev->ready) {
819 		pr_warn("%s: delayedwork queued before hidpp interface was enumerated\n",
820 			__func__);
821 		spin_unlock_irqrestore(&djrcv_dev->lock, flags);
822 		return;
823 	}
824 
825 	count = kfifo_out(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
826 
827 	if (count != sizeof(workitem)) {
828 		spin_unlock_irqrestore(&djrcv_dev->lock, flags);
829 		return;
830 	}
831 
832 	if (!kfifo_is_empty(&djrcv_dev->notif_fifo))
833 		schedule_work(&djrcv_dev->work);
834 
835 	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
836 
837 	switch (workitem.type) {
838 	case WORKITEM_TYPE_PAIRED:
839 		logi_dj_recv_add_djhid_device(djrcv_dev, &workitem);
840 		break;
841 	case WORKITEM_TYPE_UNPAIRED:
842 		logi_dj_recv_destroy_djhid_device(djrcv_dev, &workitem);
843 		break;
844 	case WORKITEM_TYPE_UNKNOWN:
845 		retval = logi_dj_recv_query_paired_devices(djrcv_dev);
846 		if (retval) {
847 			hid_err(djrcv_dev->hidpp, "%s: logi_dj_recv_query_paired_devices error: %d\n",
848 				__func__, retval);
849 		}
850 		break;
851 	case WORKITEM_TYPE_EMPTY:
852 		dbg_hid("%s: device list is empty\n", __func__);
853 		break;
854 	}
855 }
856 
857 /*
858  * Sometimes we receive reports for which we do not have a paired dj_device
859  * associated with the device_index or report-type to forward the report to.
860  * This means that the original "device paired" notification corresponding
861  * to the dj_device never arrived to this driver. Possible reasons for this are:
862  * 1) hid-core discards all packets coming from a device during probe().
863  * 2) if the receiver is plugged into a KVM switch then the pairing reports
864  * are only forwarded to it if the focus is on this PC.
865  * This function deals with this by re-asking the receiver for the list of
866  * connected devices in the delayed work callback.
867  * This function MUST be called with djrcv->lock held.
868  */
869 static void logi_dj_recv_queue_unknown_work(struct dj_receiver_dev *djrcv_dev)
870 {
871 	struct dj_workitem workitem = { .type = WORKITEM_TYPE_UNKNOWN };
872 
873 	/* Rate limit queries done because of unhandled reports to 2/sec */
874 	if (time_before(jiffies, djrcv_dev->last_query + HZ / 2))
875 		return;
876 
877 	kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
878 	schedule_work(&djrcv_dev->work);
879 }
880 
881 static void logi_dj_recv_queue_notification(struct dj_receiver_dev *djrcv_dev,
882 					   struct dj_report *dj_report)
883 {
884 	/* We are called from atomic context (tasklet && djrcv->lock held) */
885 	struct dj_workitem workitem = {
886 		.device_index = dj_report->device_index,
887 	};
888 
889 	switch (dj_report->report_type) {
890 	case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
891 		workitem.type = WORKITEM_TYPE_PAIRED;
892 		if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] &
893 		    SPFUNCTION_DEVICE_LIST_EMPTY) {
894 			workitem.type = WORKITEM_TYPE_EMPTY;
895 			break;
896 		}
897 		fallthrough;
898 	case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
899 		workitem.quad_id_msb =
900 			dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB];
901 		workitem.quad_id_lsb =
902 			dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB];
903 		workitem.reports_supported = get_unaligned_le32(
904 						dj_report->report_params +
905 						DEVICE_PAIRED_RF_REPORT_TYPE);
906 		workitem.reports_supported |= HIDPP;
907 		if (dj_report->report_type == REPORT_TYPE_NOTIF_DEVICE_UNPAIRED)
908 			workitem.type = WORKITEM_TYPE_UNPAIRED;
909 		break;
910 	default:
911 		logi_dj_recv_queue_unknown_work(djrcv_dev);
912 		return;
913 	}
914 
915 	kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
916 	schedule_work(&djrcv_dev->work);
917 }
918 
919 /*
920  * Some quad/bluetooth keyboards have a builtin touchpad in this case we see
921  * only 1 paired device with a device_type of REPORT_TYPE_KEYBOARD. For the
922  * touchpad to work we must also forward mouse input reports to the dj_hiddev
923  * created for the keyboard (instead of forwarding them to a second paired
924  * device with a device_type of REPORT_TYPE_MOUSE as we normally would).
925  *
926  * On Dinovo receivers the keyboard's touchpad and an optional paired actual
927  * mouse send separate input reports, INPUT(2) aka STD_MOUSE for the mouse
928  * and INPUT(5) aka KBD_MOUSE for the keyboard's touchpad.
929  *
930  * On MX5x00 receivers (which can also be paired with a Dinovo keyboard)
931  * INPUT(2) is used for both an optional paired actual mouse and for the
932  * keyboard's touchpad.
933  */
934 static const u16 kbd_builtin_touchpad_ids[] = {
935 	0xb309, /* Dinovo Edge */
936 	0xb30c, /* Dinovo Mini */
937 };
938 
939 static void logi_hidpp_dev_conn_notif_equad(struct hid_device *hdev,
940 					    struct hidpp_event *hidpp_report,
941 					    struct dj_workitem *workitem)
942 {
943 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
944 	int i, id;
945 
946 	workitem->type = WORKITEM_TYPE_PAIRED;
947 	workitem->device_type = hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] &
948 				HIDPP_DEVICE_TYPE_MASK;
949 	workitem->quad_id_msb = hidpp_report->params[HIDPP_PARAM_EQUAD_MSB];
950 	workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_EQUAD_LSB];
951 	switch (workitem->device_type) {
952 	case REPORT_TYPE_KEYBOARD:
953 		workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA |
954 					       POWER_KEYS | MEDIA_CENTER |
955 					       HIDPP;
956 		id = (workitem->quad_id_msb << 8) | workitem->quad_id_lsb;
957 		for (i = 0; i < ARRAY_SIZE(kbd_builtin_touchpad_ids); i++) {
958 			if (id == kbd_builtin_touchpad_ids[i]) {
959 				if (djrcv_dev->type == recvr_type_dinovo)
960 					workitem->reports_supported |= KBD_MOUSE;
961 				else
962 					workitem->reports_supported |= STD_MOUSE;
963 				break;
964 			}
965 		}
966 		break;
967 	case REPORT_TYPE_MOUSE:
968 		workitem->reports_supported |= STD_MOUSE | HIDPP;
969 		if (djrcv_dev->type == recvr_type_mouse_only)
970 			workitem->reports_supported |= MULTIMEDIA;
971 		break;
972 	}
973 }
974 
975 static void logi_hidpp_dev_conn_notif_27mhz(struct hid_device *hdev,
976 					    struct hidpp_event *hidpp_report,
977 					    struct dj_workitem *workitem)
978 {
979 	workitem->type = WORKITEM_TYPE_PAIRED;
980 	workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID];
981 	switch (hidpp_report->device_index) {
982 	case 1: /* Index 1 is always a mouse */
983 	case 2: /* Index 2 is always a mouse */
984 		workitem->device_type = HIDPP_DEVICE_TYPE_MOUSE;
985 		workitem->reports_supported |= STD_MOUSE | HIDPP;
986 		break;
987 	case 3: /* Index 3 is always the keyboard */
988 		if (hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] & HIDPP_27MHZ_SECURE_MASK) {
989 			hid_info(hdev, "Keyboard connection is encrypted\n");
990 		} else {
991 			hid_warn(hdev, "Keyboard events are send over the air in plain-text / unencrypted\n");
992 			hid_warn(hdev, "See: https://gitlab.freedesktop.org/jwrdegoede/logitech-27mhz-keyboard-encryption-setup/\n");
993 		}
994 		fallthrough;
995 	case 4: /* Index 4 is used for an optional separate numpad */
996 		workitem->device_type = HIDPP_DEVICE_TYPE_KEYBOARD;
997 		workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA |
998 					       POWER_KEYS | HIDPP;
999 		break;
1000 	default:
1001 		hid_warn(hdev, "%s: unexpected device-index %d", __func__,
1002 			 hidpp_report->device_index);
1003 	}
1004 }
1005 
1006 static void logi_hidpp_recv_queue_notif(struct hid_device *hdev,
1007 					struct hidpp_event *hidpp_report)
1008 {
1009 	/* We are called from atomic context (tasklet && djrcv->lock held) */
1010 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1011 	const char *device_type = "UNKNOWN";
1012 	struct dj_workitem workitem = {
1013 		.type = WORKITEM_TYPE_EMPTY,
1014 		.device_index = hidpp_report->device_index,
1015 	};
1016 
1017 	switch (hidpp_report->params[HIDPP_PARAM_PROTO_TYPE]) {
1018 	case 0x01:
1019 		device_type = "Bluetooth";
1020 		/* Bluetooth connect packet contents is the same as (e)QUAD */
1021 		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
1022 		if (!(hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] &
1023 						HIDPP_MANUFACTURER_MASK)) {
1024 			hid_info(hdev, "Non Logitech device connected on slot %d\n",
1025 				 hidpp_report->device_index);
1026 			workitem.reports_supported &= ~HIDPP;
1027 		}
1028 		break;
1029 	case 0x02:
1030 		device_type = "27 Mhz";
1031 		logi_hidpp_dev_conn_notif_27mhz(hdev, hidpp_report, &workitem);
1032 		break;
1033 	case 0x03:
1034 		device_type = "QUAD or eQUAD";
1035 		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
1036 		break;
1037 	case 0x04:
1038 		device_type = "eQUAD step 4 DJ";
1039 		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
1040 		break;
1041 	case 0x05:
1042 		device_type = "DFU Lite";
1043 		break;
1044 	case 0x06:
1045 		device_type = "eQUAD step 4 Lite";
1046 		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
1047 		break;
1048 	case 0x07:
1049 		device_type = "eQUAD step 4 Gaming";
1050 		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
1051 		workitem.reports_supported |= STD_KEYBOARD;
1052 		break;
1053 	case 0x08:
1054 		device_type = "eQUAD step 4 for gamepads";
1055 		break;
1056 	case 0x0a:
1057 		device_type = "eQUAD nano Lite";
1058 		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
1059 		break;
1060 	case 0x0c:
1061 		device_type = "eQUAD Lightspeed 1";
1062 		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
1063 		workitem.reports_supported |= STD_KEYBOARD;
1064 		break;
1065 	case 0x0d:
1066 		device_type = "eQUAD Lightspeed 1.1";
1067 		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
1068 		workitem.reports_supported |= STD_KEYBOARD;
1069 		break;
1070 	case 0x0f:
1071 	case 0x11:
1072 		device_type = "eQUAD Lightspeed 1.2";
1073 		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
1074 		workitem.reports_supported |= STD_KEYBOARD;
1075 		break;
1076 	}
1077 
1078 	/* custom receiver device (eg. powerplay) */
1079 	if (hidpp_report->device_index == 7) {
1080 		workitem.reports_supported |= HIDPP;
1081 	}
1082 
1083 	if (workitem.type == WORKITEM_TYPE_EMPTY) {
1084 		hid_warn(hdev,
1085 			 "unusable device of type %s (0x%02x) connected on slot %d",
1086 			 device_type,
1087 			 hidpp_report->params[HIDPP_PARAM_PROTO_TYPE],
1088 			 hidpp_report->device_index);
1089 		return;
1090 	}
1091 
1092 	hid_info(hdev, "device of type %s (0x%02x) connected on slot %d",
1093 		 device_type, hidpp_report->params[HIDPP_PARAM_PROTO_TYPE],
1094 		 hidpp_report->device_index);
1095 
1096 	kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
1097 	schedule_work(&djrcv_dev->work);
1098 }
1099 
1100 static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev,
1101 					     struct dj_report *dj_report)
1102 {
1103 	/* We are called from atomic context (tasklet && djrcv->lock held) */
1104 	unsigned int i;
1105 	u8 reportbuffer[MAX_REPORT_SIZE];
1106 	struct dj_device *djdev;
1107 
1108 	djdev = djrcv_dev->paired_dj_devices[dj_report->device_index];
1109 
1110 	memset(reportbuffer, 0, sizeof(reportbuffer));
1111 
1112 	for (i = 0; i < NUMBER_OF_HID_REPORTS; i++) {
1113 		if (djdev->reports_supported & (1 << i)) {
1114 			reportbuffer[0] = i;
1115 			if (hid_input_report(djdev->hdev,
1116 					     HID_INPUT_REPORT,
1117 					     reportbuffer,
1118 					     hid_reportid_size_map[i], 1)) {
1119 				dbg_hid("hid_input_report error sending null "
1120 					"report\n");
1121 			}
1122 		}
1123 	}
1124 }
1125 
1126 static void logi_dj_recv_forward_dj(struct dj_receiver_dev *djrcv_dev,
1127 				    struct dj_report *dj_report)
1128 {
1129 	/* We are called from atomic context (tasklet && djrcv->lock held) */
1130 	struct dj_device *dj_device;
1131 
1132 	dj_device = djrcv_dev->paired_dj_devices[dj_report->device_index];
1133 
1134 	if ((dj_report->report_type > ARRAY_SIZE(hid_reportid_size_map) - 1) ||
1135 	    (hid_reportid_size_map[dj_report->report_type] == 0)) {
1136 		dbg_hid("invalid report type:%x\n", dj_report->report_type);
1137 		return;
1138 	}
1139 
1140 	if (hid_input_report(dj_device->hdev,
1141 			HID_INPUT_REPORT, &dj_report->report_type,
1142 			hid_reportid_size_map[dj_report->report_type], 1)) {
1143 		dbg_hid("hid_input_report error\n");
1144 	}
1145 }
1146 
1147 static void logi_dj_recv_forward_report(struct dj_device *dj_dev, u8 *data,
1148 					int size)
1149 {
1150 	/* We are called from atomic context (tasklet && djrcv->lock held) */
1151 	if (hid_input_report(dj_dev->hdev, HID_INPUT_REPORT, data, size, 1))
1152 		dbg_hid("hid_input_report error\n");
1153 }
1154 
1155 static void logi_dj_recv_forward_input_report(struct hid_device *hdev,
1156 					      u8 *data, int size)
1157 {
1158 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1159 	struct dj_device *dj_dev;
1160 	unsigned long flags;
1161 	u8 report = data[0];
1162 	int i;
1163 
1164 	if (report > REPORT_TYPE_RFREPORT_LAST) {
1165 		hid_err(hdev, "Unexpected input report number %d\n", report);
1166 		return;
1167 	}
1168 
1169 	spin_lock_irqsave(&djrcv_dev->lock, flags);
1170 	for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) {
1171 		dj_dev = djrcv_dev->paired_dj_devices[i];
1172 		if (dj_dev && (dj_dev->reports_supported & BIT(report))) {
1173 			logi_dj_recv_forward_report(dj_dev, data, size);
1174 			spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1175 			return;
1176 		}
1177 	}
1178 
1179 	logi_dj_recv_queue_unknown_work(djrcv_dev);
1180 	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1181 
1182 	dbg_hid("No dj-devs handling input report number %d\n", report);
1183 }
1184 
1185 static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev,
1186 				    struct dj_report *dj_report)
1187 {
1188 	struct hid_device *hdev = djrcv_dev->hidpp;
1189 	struct hid_report *report;
1190 	struct hid_report_enum *output_report_enum;
1191 	u8 *data = (u8 *)(&dj_report->device_index);
1192 	unsigned int i;
1193 
1194 	output_report_enum = &hdev->report_enum[HID_OUTPUT_REPORT];
1195 	report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT];
1196 
1197 	if (!report) {
1198 		hid_err(hdev, "%s: unable to find dj report\n", __func__);
1199 		return -ENODEV;
1200 	}
1201 
1202 	for (i = 0; i < DJREPORT_SHORT_LENGTH - 1; i++)
1203 		report->field[0]->value[i] = data[i];
1204 
1205 	hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
1206 
1207 	return 0;
1208 }
1209 
1210 static int logi_dj_recv_query_hidpp_devices(struct dj_receiver_dev *djrcv_dev)
1211 {
1212 	static const u8 template[] = {
1213 		REPORT_ID_HIDPP_SHORT,
1214 		HIDPP_RECEIVER_INDEX,
1215 		HIDPP_SET_REGISTER,
1216 		HIDPP_REG_CONNECTION_STATE,
1217 		HIDPP_FAKE_DEVICE_ARRIVAL,
1218 		0x00, 0x00
1219 	};
1220 	u8 *hidpp_report;
1221 	int retval;
1222 
1223 	hidpp_report = kmemdup(template, sizeof(template), GFP_KERNEL);
1224 	if (!hidpp_report)
1225 		return -ENOMEM;
1226 
1227 	retval = hid_hw_raw_request(djrcv_dev->hidpp,
1228 				    REPORT_ID_HIDPP_SHORT,
1229 				    hidpp_report, sizeof(template),
1230 				    HID_OUTPUT_REPORT,
1231 				    HID_REQ_SET_REPORT);
1232 
1233 	kfree(hidpp_report);
1234 	return (retval < 0) ? retval : 0;
1235 }
1236 
1237 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev)
1238 {
1239 	struct dj_report *dj_report;
1240 	int retval;
1241 
1242 	djrcv_dev->last_query = jiffies;
1243 
1244 	if (djrcv_dev->type != recvr_type_dj)
1245 		return logi_dj_recv_query_hidpp_devices(djrcv_dev);
1246 
1247 	dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
1248 	if (!dj_report)
1249 		return -ENOMEM;
1250 	dj_report->report_id = REPORT_ID_DJ_SHORT;
1251 	dj_report->device_index = HIDPP_RECEIVER_INDEX;
1252 	dj_report->report_type = REPORT_TYPE_CMD_GET_PAIRED_DEVICES;
1253 	retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
1254 	kfree(dj_report);
1255 	return retval;
1256 }
1257 
1258 
1259 static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev,
1260 					  unsigned timeout)
1261 {
1262 	struct hid_device *hdev = djrcv_dev->hidpp;
1263 	struct dj_report *dj_report;
1264 	u8 *buf;
1265 	int retval = 0;
1266 
1267 	dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
1268 	if (!dj_report)
1269 		return -ENOMEM;
1270 
1271 	if (djrcv_dev->type == recvr_type_dj) {
1272 		dj_report->report_id = REPORT_ID_DJ_SHORT;
1273 		dj_report->device_index = HIDPP_RECEIVER_INDEX;
1274 		dj_report->report_type = REPORT_TYPE_CMD_SWITCH;
1275 		dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F;
1276 		dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] =
1277 								(u8)timeout;
1278 
1279 		retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
1280 
1281 		/*
1282 		 * Ugly sleep to work around a USB 3.0 bug when the receiver is
1283 		 * still processing the "switch-to-dj" command while we send an
1284 		 * other command.
1285 		 * 50 msec should gives enough time to the receiver to be ready.
1286 		 */
1287 		msleep(50);
1288 
1289 		if (retval)
1290 			return retval;
1291 	}
1292 
1293 	/*
1294 	 * Magical bits to set up hidpp notifications when the dj devices
1295 	 * are connected/disconnected.
1296 	 *
1297 	 * We can reuse dj_report because HIDPP_REPORT_SHORT_LENGTH is smaller
1298 	 * than DJREPORT_SHORT_LENGTH.
1299 	 */
1300 	buf = (u8 *)dj_report;
1301 
1302 	memset(buf, 0, HIDPP_REPORT_SHORT_LENGTH);
1303 
1304 	buf[0] = REPORT_ID_HIDPP_SHORT;
1305 	buf[1] = HIDPP_RECEIVER_INDEX;
1306 	buf[2] = 0x80;
1307 	buf[3] = 0x00;
1308 	buf[4] = 0x00;
1309 	buf[5] = 0x09;
1310 	buf[6] = 0x00;
1311 
1312 	retval = hid_hw_raw_request(hdev, REPORT_ID_HIDPP_SHORT, buf,
1313 			HIDPP_REPORT_SHORT_LENGTH, HID_OUTPUT_REPORT,
1314 			HID_REQ_SET_REPORT);
1315 
1316 	kfree(dj_report);
1317 	return retval;
1318 }
1319 
1320 
1321 static int logi_dj_ll_open(struct hid_device *hid)
1322 {
1323 	dbg_hid("%s: %s\n", __func__, hid->phys);
1324 	return 0;
1325 
1326 }
1327 
1328 static void logi_dj_ll_close(struct hid_device *hid)
1329 {
1330 	dbg_hid("%s: %s\n", __func__, hid->phys);
1331 }
1332 
1333 /*
1334  * Register 0xB5 is "pairing information". It is solely intended for the
1335  * receiver, so do not overwrite the device index.
1336  */
1337 static u8 unifying_pairing_query[]  = { REPORT_ID_HIDPP_SHORT,
1338 					HIDPP_RECEIVER_INDEX,
1339 					HIDPP_GET_LONG_REGISTER,
1340 					HIDPP_REG_PAIRING_INFORMATION };
1341 static u8 unifying_pairing_answer[] = { REPORT_ID_HIDPP_LONG,
1342 					HIDPP_RECEIVER_INDEX,
1343 					HIDPP_GET_LONG_REGISTER,
1344 					HIDPP_REG_PAIRING_INFORMATION };
1345 
1346 static int logi_dj_ll_raw_request(struct hid_device *hid,
1347 				  unsigned char reportnum, __u8 *buf,
1348 				  size_t count, unsigned char report_type,
1349 				  int reqtype)
1350 {
1351 	struct dj_device *djdev = hid->driver_data;
1352 	struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev;
1353 	u8 *out_buf;
1354 	int ret;
1355 
1356 	if ((buf[0] == REPORT_ID_HIDPP_SHORT) ||
1357 	    (buf[0] == REPORT_ID_HIDPP_LONG) ||
1358 	    (buf[0] == REPORT_ID_HIDPP_VERY_LONG)) {
1359 		if (count < 2)
1360 			return -EINVAL;
1361 
1362 		/* special case where we should not overwrite
1363 		 * the device_index */
1364 		if (count == 7 && !memcmp(buf, unifying_pairing_query,
1365 					  sizeof(unifying_pairing_query)))
1366 			buf[4] = (buf[4] & 0xf0) | (djdev->device_index - 1);
1367 		else
1368 			buf[1] = djdev->device_index;
1369 		return hid_hw_raw_request(djrcv_dev->hidpp, reportnum, buf,
1370 				count, report_type, reqtype);
1371 	}
1372 
1373 	if (buf[0] != REPORT_TYPE_LEDS)
1374 		return -EINVAL;
1375 
1376 	if (djrcv_dev->type != recvr_type_dj && count >= 2) {
1377 		if (!djrcv_dev->keyboard) {
1378 			hid_warn(hid, "Received REPORT_TYPE_LEDS request before the keyboard interface was enumerated\n");
1379 			return 0;
1380 		}
1381 		/* usbhid overrides the report ID and ignores the first byte */
1382 		return hid_hw_raw_request(djrcv_dev->keyboard, 0, buf, count,
1383 					  report_type, reqtype);
1384 	}
1385 
1386 	out_buf = kzalloc(DJREPORT_SHORT_LENGTH, GFP_ATOMIC);
1387 	if (!out_buf)
1388 		return -ENOMEM;
1389 
1390 	if (count > DJREPORT_SHORT_LENGTH - 2)
1391 		count = DJREPORT_SHORT_LENGTH - 2;
1392 
1393 	out_buf[0] = REPORT_ID_DJ_SHORT;
1394 	out_buf[1] = djdev->device_index;
1395 	memcpy(out_buf + 2, buf, count);
1396 
1397 	ret = hid_hw_raw_request(djrcv_dev->hidpp, out_buf[0], out_buf,
1398 		DJREPORT_SHORT_LENGTH, report_type, reqtype);
1399 
1400 	kfree(out_buf);
1401 	return ret;
1402 }
1403 
1404 static void rdcat(char *rdesc, unsigned int *rsize, const char *data, unsigned int size)
1405 {
1406 	memcpy(rdesc + *rsize, data, size);
1407 	*rsize += size;
1408 }
1409 
1410 static int logi_dj_ll_parse(struct hid_device *hid)
1411 {
1412 	struct dj_device *djdev = hid->driver_data;
1413 	unsigned int rsize = 0;
1414 	char *rdesc;
1415 	int retval;
1416 
1417 	dbg_hid("%s\n", __func__);
1418 
1419 	djdev->hdev->version = 0x0111;
1420 	djdev->hdev->country = 0x00;
1421 
1422 	rdesc = kmalloc(MAX_RDESC_SIZE, GFP_KERNEL);
1423 	if (!rdesc)
1424 		return -ENOMEM;
1425 
1426 	if (djdev->reports_supported & STD_KEYBOARD) {
1427 		dbg_hid("%s: sending a kbd descriptor, reports_supported: %llx\n",
1428 			__func__, djdev->reports_supported);
1429 		rdcat(rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor));
1430 	}
1431 
1432 	if (djdev->reports_supported & STD_MOUSE) {
1433 		dbg_hid("%s: sending a mouse descriptor, reports_supported: %llx\n",
1434 			__func__, djdev->reports_supported);
1435 		if (djdev->dj_receiver_dev->type == recvr_type_gaming_hidpp ||
1436 		    djdev->dj_receiver_dev->type == recvr_type_mouse_only)
1437 			rdcat(rdesc, &rsize, mse_high_res_descriptor,
1438 			      sizeof(mse_high_res_descriptor));
1439 		else if (djdev->dj_receiver_dev->type == recvr_type_27mhz)
1440 			rdcat(rdesc, &rsize, mse_27mhz_descriptor,
1441 			      sizeof(mse_27mhz_descriptor));
1442 		else if (recvr_type_is_bluetooth(djdev->dj_receiver_dev->type))
1443 			rdcat(rdesc, &rsize, mse_bluetooth_descriptor,
1444 			      sizeof(mse_bluetooth_descriptor));
1445 		else
1446 			rdcat(rdesc, &rsize, mse_descriptor,
1447 			      sizeof(mse_descriptor));
1448 	}
1449 
1450 	if (djdev->reports_supported & KBD_MOUSE) {
1451 		dbg_hid("%s: sending a kbd-mouse descriptor, reports_supported: %llx\n",
1452 			__func__, djdev->reports_supported);
1453 		rdcat(rdesc, &rsize, mse5_bluetooth_descriptor,
1454 		      sizeof(mse5_bluetooth_descriptor));
1455 	}
1456 
1457 	if (djdev->reports_supported & MULTIMEDIA) {
1458 		dbg_hid("%s: sending a multimedia report descriptor: %llx\n",
1459 			__func__, djdev->reports_supported);
1460 		rdcat(rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor));
1461 	}
1462 
1463 	if (djdev->reports_supported & POWER_KEYS) {
1464 		dbg_hid("%s: sending a power keys report descriptor: %llx\n",
1465 			__func__, djdev->reports_supported);
1466 		rdcat(rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor));
1467 	}
1468 
1469 	if (djdev->reports_supported & MEDIA_CENTER) {
1470 		dbg_hid("%s: sending a media center report descriptor: %llx\n",
1471 			__func__, djdev->reports_supported);
1472 		rdcat(rdesc, &rsize, media_descriptor, sizeof(media_descriptor));
1473 	}
1474 
1475 	if (djdev->reports_supported & KBD_LEDS) {
1476 		dbg_hid("%s: need to send kbd leds report descriptor: %llx\n",
1477 			__func__, djdev->reports_supported);
1478 	}
1479 
1480 	if (djdev->reports_supported & HIDPP) {
1481 		dbg_hid("%s: sending a HID++ descriptor, reports_supported: %llx\n",
1482 			__func__, djdev->reports_supported);
1483 		rdcat(rdesc, &rsize, hidpp_descriptor,
1484 		      sizeof(hidpp_descriptor));
1485 	}
1486 
1487 	retval = hid_parse_report(hid, rdesc, rsize);
1488 	kfree(rdesc);
1489 
1490 	return retval;
1491 }
1492 
1493 static int logi_dj_ll_start(struct hid_device *hid)
1494 {
1495 	dbg_hid("%s\n", __func__);
1496 	return 0;
1497 }
1498 
1499 static void logi_dj_ll_stop(struct hid_device *hid)
1500 {
1501 	dbg_hid("%s\n", __func__);
1502 }
1503 
1504 static bool logi_dj_ll_may_wakeup(struct hid_device *hid)
1505 {
1506 	struct dj_device *djdev = hid->driver_data;
1507 	struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev;
1508 
1509 	return hid_hw_may_wakeup(djrcv_dev->hidpp);
1510 }
1511 
1512 static const struct hid_ll_driver logi_dj_ll_driver = {
1513 	.parse = logi_dj_ll_parse,
1514 	.start = logi_dj_ll_start,
1515 	.stop = logi_dj_ll_stop,
1516 	.open = logi_dj_ll_open,
1517 	.close = logi_dj_ll_close,
1518 	.raw_request = logi_dj_ll_raw_request,
1519 	.may_wakeup = logi_dj_ll_may_wakeup,
1520 };
1521 
1522 static int logi_dj_dj_event(struct hid_device *hdev,
1523 			     struct hid_report *report, u8 *data,
1524 			     int size)
1525 {
1526 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1527 	struct dj_report *dj_report = (struct dj_report *) data;
1528 	unsigned long flags;
1529 
1530 	/*
1531 	 * Here we receive all data coming from iface 2, there are 3 cases:
1532 	 *
1533 	 * 1) Data is intended for this driver i. e. data contains arrival,
1534 	 * departure, etc notifications, in which case we queue them for delayed
1535 	 * processing by the work queue. We return 1 to hid-core as no further
1536 	 * processing is required from it.
1537 	 *
1538 	 * 2) Data informs a connection change, if the change means rf link
1539 	 * loss, then we must send a null report to the upper layer to discard
1540 	 * potentially pressed keys that may be repeated forever by the input
1541 	 * layer. Return 1 to hid-core as no further processing is required.
1542 	 *
1543 	 * 3) Data is an actual input event from a paired DJ device in which
1544 	 * case we forward it to the correct hid device (via hid_input_report()
1545 	 * ) and return 1 so hid-core does not anything else with it.
1546 	 */
1547 
1548 	if ((dj_report->device_index < DJ_DEVICE_INDEX_MIN) ||
1549 	    (dj_report->device_index > DJ_DEVICE_INDEX_MAX)) {
1550 		/*
1551 		 * Device index is wrong, bail out.
1552 		 * This driver can ignore safely the receiver notifications,
1553 		 * so ignore those reports too.
1554 		 */
1555 		if (dj_report->device_index != DJ_RECEIVER_INDEX)
1556 			hid_err(hdev, "%s: invalid device index:%d\n",
1557 				__func__, dj_report->device_index);
1558 		return false;
1559 	}
1560 
1561 	spin_lock_irqsave(&djrcv_dev->lock, flags);
1562 
1563 	if (!djrcv_dev->paired_dj_devices[dj_report->device_index]) {
1564 		/* received an event for an unknown device, bail out */
1565 		logi_dj_recv_queue_notification(djrcv_dev, dj_report);
1566 		goto out;
1567 	}
1568 
1569 	switch (dj_report->report_type) {
1570 	case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
1571 		/* pairing notifications are handled above the switch */
1572 		break;
1573 	case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
1574 		logi_dj_recv_queue_notification(djrcv_dev, dj_report);
1575 		break;
1576 	case REPORT_TYPE_NOTIF_CONNECTION_STATUS:
1577 		if (dj_report->report_params[CONNECTION_STATUS_PARAM_STATUS] ==
1578 		    STATUS_LINKLOSS) {
1579 			logi_dj_recv_forward_null_report(djrcv_dev, dj_report);
1580 		}
1581 		break;
1582 	default:
1583 		logi_dj_recv_forward_dj(djrcv_dev, dj_report);
1584 	}
1585 
1586 out:
1587 	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1588 
1589 	return true;
1590 }
1591 
1592 static int logi_dj_hidpp_event(struct hid_device *hdev,
1593 			     struct hid_report *report, u8 *data,
1594 			     int size)
1595 {
1596 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1597 	struct hidpp_event *hidpp_report = (struct hidpp_event *) data;
1598 	struct dj_device *dj_dev;
1599 	unsigned long flags;
1600 	u8 device_index = hidpp_report->device_index;
1601 
1602 	if (device_index == HIDPP_RECEIVER_INDEX) {
1603 		/* special case were the device wants to know its unifying
1604 		 * name */
1605 		if (size == HIDPP_REPORT_LONG_LENGTH &&
1606 		    !memcmp(data, unifying_pairing_answer,
1607 			    sizeof(unifying_pairing_answer)))
1608 			device_index = (data[4] & 0x0F) + 1;
1609 		else
1610 			return false;
1611 	}
1612 
1613 	/*
1614 	 * Data is from the HID++ collection, in this case, we forward the
1615 	 * data to the corresponding child dj device and return 0 to hid-core
1616 	 * so he data also goes to the hidraw device of the receiver. This
1617 	 * allows a user space application to implement the full HID++ routing
1618 	 * via the receiver.
1619 	 */
1620 
1621 	if ((device_index < DJ_DEVICE_INDEX_MIN) ||
1622 	    (device_index > DJ_DEVICE_INDEX_MAX)) {
1623 		/*
1624 		 * Device index is wrong, bail out.
1625 		 * This driver can ignore safely the receiver notifications,
1626 		 * so ignore those reports too.
1627 		 */
1628 		hid_err(hdev, "%s: invalid device index:%d\n", __func__,
1629 			hidpp_report->device_index);
1630 		return false;
1631 	}
1632 
1633 	spin_lock_irqsave(&djrcv_dev->lock, flags);
1634 
1635 	dj_dev = djrcv_dev->paired_dj_devices[device_index];
1636 
1637 	/*
1638 	 * With 27 MHz receivers, we do not get an explicit unpair event,
1639 	 * remove the old device if the user has paired a *different* device.
1640 	 */
1641 	if (djrcv_dev->type == recvr_type_27mhz && dj_dev &&
1642 	    hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED &&
1643 	    hidpp_report->params[HIDPP_PARAM_PROTO_TYPE] == 0x02 &&
1644 	    hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID] !=
1645 						dj_dev->hdev->product) {
1646 		struct dj_workitem workitem = {
1647 			.device_index = hidpp_report->device_index,
1648 			.type = WORKITEM_TYPE_UNPAIRED,
1649 		};
1650 		kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
1651 		/* logi_hidpp_recv_queue_notif will queue the work */
1652 		dj_dev = NULL;
1653 	}
1654 
1655 	if (dj_dev) {
1656 		logi_dj_recv_forward_report(dj_dev, data, size);
1657 	} else {
1658 		if (hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED)
1659 			logi_hidpp_recv_queue_notif(hdev, hidpp_report);
1660 		else
1661 			logi_dj_recv_queue_unknown_work(djrcv_dev);
1662 	}
1663 
1664 	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1665 
1666 	return false;
1667 }
1668 
1669 static int logi_dj_raw_event(struct hid_device *hdev,
1670 			     struct hid_report *report, u8 *data,
1671 			     int size)
1672 {
1673 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1674 	dbg_hid("%s, size:%d\n", __func__, size);
1675 
1676 	if (!djrcv_dev)
1677 		return 0;
1678 
1679 	if (!hdev->report_enum[HID_INPUT_REPORT].numbered) {
1680 
1681 		if (djrcv_dev->unnumbered_application == HID_GD_KEYBOARD) {
1682 			/*
1683 			 * For the keyboard, we can reuse the same report by
1684 			 * using the second byte which is constant in the USB
1685 			 * HID report descriptor.
1686 			 */
1687 			data[1] = data[0];
1688 			data[0] = REPORT_TYPE_KEYBOARD;
1689 
1690 			logi_dj_recv_forward_input_report(hdev, data, size);
1691 
1692 			/* restore previous state */
1693 			data[0] = data[1];
1694 			data[1] = 0;
1695 		}
1696 		/*
1697 		 * Mouse-only receivers send unnumbered mouse data. The 27 MHz
1698 		 * receiver uses 6 byte packets, the nano receiver 8 bytes.
1699 		 */
1700 		if (djrcv_dev->unnumbered_application == HID_GD_MOUSE &&
1701 		    size <= 8) {
1702 			u8 mouse_report[9];
1703 
1704 			/* Prepend report id */
1705 			mouse_report[0] = REPORT_TYPE_MOUSE;
1706 			memcpy(mouse_report + 1, data, size);
1707 			logi_dj_recv_forward_input_report(hdev, mouse_report,
1708 							  size + 1);
1709 		}
1710 
1711 		return false;
1712 	}
1713 
1714 	switch (data[0]) {
1715 	case REPORT_ID_DJ_SHORT:
1716 		if (size != DJREPORT_SHORT_LENGTH) {
1717 			hid_err(hdev, "Short DJ report bad size (%d)", size);
1718 			return false;
1719 		}
1720 		return logi_dj_dj_event(hdev, report, data, size);
1721 	case REPORT_ID_DJ_LONG:
1722 		if (size != DJREPORT_LONG_LENGTH) {
1723 			hid_err(hdev, "Long DJ report bad size (%d)", size);
1724 			return false;
1725 		}
1726 		return logi_dj_dj_event(hdev, report, data, size);
1727 	case REPORT_ID_HIDPP_SHORT:
1728 		if (size != HIDPP_REPORT_SHORT_LENGTH) {
1729 			hid_err(hdev, "Short HID++ report bad size (%d)", size);
1730 			return false;
1731 		}
1732 		return logi_dj_hidpp_event(hdev, report, data, size);
1733 	case REPORT_ID_HIDPP_LONG:
1734 		if (size != HIDPP_REPORT_LONG_LENGTH) {
1735 			hid_err(hdev, "Long HID++ report bad size (%d)", size);
1736 			return false;
1737 		}
1738 		return logi_dj_hidpp_event(hdev, report, data, size);
1739 	}
1740 
1741 	logi_dj_recv_forward_input_report(hdev, data, size);
1742 
1743 	return false;
1744 }
1745 
1746 static int logi_dj_probe(struct hid_device *hdev,
1747 			 const struct hid_device_id *id)
1748 {
1749 	struct hid_report_enum *rep_enum;
1750 	struct hid_report *rep;
1751 	struct dj_receiver_dev *djrcv_dev;
1752 	struct usb_interface *intf;
1753 	unsigned int no_dj_interfaces = 0;
1754 	bool has_hidpp = false;
1755 	unsigned long flags;
1756 	int retval;
1757 
1758 	/*
1759 	 * Call to usbhid to fetch the HID descriptors of the current
1760 	 * interface subsequently call to the hid/hid-core to parse the
1761 	 * fetched descriptors.
1762 	 */
1763 	retval = hid_parse(hdev);
1764 	if (retval) {
1765 		hid_err(hdev, "%s: parse failed\n", __func__);
1766 		return retval;
1767 	}
1768 
1769 	/*
1770 	 * Some KVMs add an extra interface for e.g. mouse emulation. If we
1771 	 * treat these as logitech-dj interfaces then this causes input events
1772 	 * reported through this extra interface to not be reported correctly.
1773 	 * To avoid this, we treat these as generic-hid devices.
1774 	 */
1775 	switch (id->driver_data) {
1776 	case recvr_type_dj:		no_dj_interfaces = 3; break;
1777 	case recvr_type_hidpp:		no_dj_interfaces = 2; break;
1778 	case recvr_type_gaming_hidpp:	no_dj_interfaces = 3; break;
1779 	case recvr_type_mouse_only:	no_dj_interfaces = 2; break;
1780 	case recvr_type_27mhz:		no_dj_interfaces = 2; break;
1781 	case recvr_type_bluetooth:	no_dj_interfaces = 2; break;
1782 	case recvr_type_dinovo:		no_dj_interfaces = 2; break;
1783 	}
1784 	if (hid_is_usb(hdev)) {
1785 		intf = to_usb_interface(hdev->dev.parent);
1786 		if (intf && intf->altsetting->desc.bInterfaceNumber >=
1787 							no_dj_interfaces) {
1788 			hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1789 			return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1790 		}
1791 	}
1792 
1793 	rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
1794 
1795 	/* no input reports, bail out */
1796 	if (list_empty(&rep_enum->report_list))
1797 		return -ENODEV;
1798 
1799 	/*
1800 	 * Check for the HID++ application.
1801 	 * Note: we should theoretically check for HID++ and DJ
1802 	 * collections, but this will do.
1803 	 */
1804 	list_for_each_entry(rep, &rep_enum->report_list, list) {
1805 		if (rep->application == 0xff000001)
1806 			has_hidpp = true;
1807 	}
1808 
1809 	/*
1810 	 * Ignore interfaces without DJ/HID++ collection, they will not carry
1811 	 * any data, dont create any hid_device for them.
1812 	 */
1813 	if (!has_hidpp && id->driver_data == recvr_type_dj)
1814 		return -ENODEV;
1815 
1816 	/* get the current application attached to the node */
1817 	rep = list_first_entry(&rep_enum->report_list, struct hid_report, list);
1818 	djrcv_dev = dj_get_receiver_dev(hdev, id->driver_data,
1819 					rep->application, has_hidpp);
1820 	if (!djrcv_dev) {
1821 		hid_err(hdev, "%s: dj_get_receiver_dev failed\n", __func__);
1822 		return -ENOMEM;
1823 	}
1824 
1825 	if (!rep_enum->numbered)
1826 		djrcv_dev->unnumbered_application = rep->application;
1827 
1828 	/* Starts the usb device and connects to upper interfaces hiddev and
1829 	 * hidraw */
1830 	retval = hid_hw_start(hdev, HID_CONNECT_HIDRAW|HID_CONNECT_HIDDEV);
1831 	if (retval) {
1832 		hid_err(hdev, "%s: hid_hw_start returned error\n", __func__);
1833 		goto hid_hw_start_fail;
1834 	}
1835 
1836 	if (has_hidpp) {
1837 		retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0);
1838 		if (retval < 0) {
1839 			hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n",
1840 				__func__, retval);
1841 			goto switch_to_dj_mode_fail;
1842 		}
1843 	}
1844 
1845 	/* This is enabling the polling urb on the IN endpoint */
1846 	retval = hid_hw_open(hdev);
1847 	if (retval < 0) {
1848 		hid_err(hdev, "%s: hid_hw_open returned error:%d\n",
1849 			__func__, retval);
1850 		goto llopen_failed;
1851 	}
1852 
1853 	/* Allow incoming packets to arrive: */
1854 	hid_device_io_start(hdev);
1855 
1856 	if (has_hidpp) {
1857 		spin_lock_irqsave(&djrcv_dev->lock, flags);
1858 		djrcv_dev->ready = true;
1859 		spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1860 		retval = logi_dj_recv_query_paired_devices(djrcv_dev);
1861 		if (retval < 0) {
1862 			hid_err(hdev, "%s: logi_dj_recv_query_paired_devices error:%d\n",
1863 				__func__, retval);
1864 			/*
1865 			 * This can happen with a KVM, let the probe succeed,
1866 			 * logi_dj_recv_queue_unknown_work will retry later.
1867 			 */
1868 		}
1869 	}
1870 
1871 	return 0;
1872 
1873 llopen_failed:
1874 switch_to_dj_mode_fail:
1875 	hid_hw_stop(hdev);
1876 
1877 hid_hw_start_fail:
1878 	dj_put_receiver_dev(hdev);
1879 	return retval;
1880 }
1881 
1882 #ifdef CONFIG_PM
1883 static int logi_dj_reset_resume(struct hid_device *hdev)
1884 {
1885 	int retval;
1886 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1887 
1888 	if (!djrcv_dev || djrcv_dev->hidpp != hdev)
1889 		return 0;
1890 
1891 	retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0);
1892 	if (retval < 0) {
1893 		hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n",
1894 			__func__, retval);
1895 	}
1896 
1897 	return 0;
1898 }
1899 #endif
1900 
1901 static void logi_dj_remove(struct hid_device *hdev)
1902 {
1903 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1904 	struct dj_device *dj_dev;
1905 	unsigned long flags;
1906 	int i;
1907 
1908 	dbg_hid("%s\n", __func__);
1909 
1910 	if (!djrcv_dev)
1911 		return hid_hw_stop(hdev);
1912 
1913 	/*
1914 	 * This ensures that if the work gets requeued from another
1915 	 * interface of the same receiver it will be a no-op.
1916 	 */
1917 	spin_lock_irqsave(&djrcv_dev->lock, flags);
1918 	djrcv_dev->ready = false;
1919 	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1920 
1921 	cancel_work_sync(&djrcv_dev->work);
1922 
1923 	hid_hw_close(hdev);
1924 	hid_hw_stop(hdev);
1925 
1926 	/*
1927 	 * For proper operation we need access to all interfaces, so we destroy
1928 	 * the paired devices when we're unbound from any interface.
1929 	 *
1930 	 * Note we may still be bound to other interfaces, sharing the same
1931 	 * djrcv_dev, so we need locking here.
1932 	 */
1933 	for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) {
1934 		spin_lock_irqsave(&djrcv_dev->lock, flags);
1935 		dj_dev = djrcv_dev->paired_dj_devices[i];
1936 		djrcv_dev->paired_dj_devices[i] = NULL;
1937 		spin_unlock_irqrestore(&djrcv_dev->lock, flags);
1938 		if (dj_dev != NULL) {
1939 			hid_destroy_device(dj_dev->hdev);
1940 			kfree(dj_dev);
1941 		}
1942 	}
1943 
1944 	dj_put_receiver_dev(hdev);
1945 }
1946 
1947 static const struct hid_device_id logi_dj_receivers[] = {
1948 	{ /* Logitech unifying receiver (0xc52b) */
1949 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1950 		USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER),
1951 	 .driver_data = recvr_type_dj},
1952 	{ /* Logitech unifying receiver (0xc532) */
1953 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1954 		USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2),
1955 	 .driver_data = recvr_type_dj},
1956 
1957 	{ /* Logitech Nano mouse only receiver (0xc52f) */
1958 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1959 			 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER),
1960 	 .driver_data = recvr_type_mouse_only},
1961 	{ /* Logitech Nano (non DJ) receiver (0xc534) */
1962 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1963 			 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_2),
1964 	 .driver_data = recvr_type_hidpp},
1965 
1966 	{ /* Logitech G700(s) receiver (0xc531) */
1967 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1968 			 USB_DEVICE_ID_LOGITECH_G700_RECEIVER),
1969 	 .driver_data = recvr_type_gaming_hidpp},
1970 	{ /* Logitech G602 receiver (0xc537) */
1971 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1972 		0xc537),
1973 	 .driver_data = recvr_type_gaming_hidpp},
1974 	{ /* Logitech lightspeed receiver (0xc539) */
1975 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1976 		USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1),
1977 	 .driver_data = recvr_type_gaming_hidpp},
1978 	{ /* Logitech powerplay receiver (0xc53a) */
1979 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1980 		USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_POWERPLAY),
1981 	 .driver_data = recvr_type_gaming_hidpp},
1982 	{ /* Logitech lightspeed receiver (0xc53f) */
1983 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1984 		USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1_1),
1985 	 .driver_data = recvr_type_gaming_hidpp},
1986 
1987 	{ /* Logitech 27 MHz HID++ 1.0 receiver (0xc513) */
1988 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER),
1989 	 .driver_data = recvr_type_27mhz},
1990 	{ /* Logitech 27 MHz HID++ 1.0 receiver (0xc517) */
1991 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1992 		USB_DEVICE_ID_S510_RECEIVER_2),
1993 	 .driver_data = recvr_type_27mhz},
1994 	{ /* Logitech 27 MHz HID++ 1.0 mouse-only receiver (0xc51b) */
1995 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1996 		USB_DEVICE_ID_LOGITECH_27MHZ_MOUSE_RECEIVER),
1997 	 .driver_data = recvr_type_27mhz},
1998 
1999 	{ /* Logitech MX5000 HID++ / bluetooth receiver keyboard intf. (0xc70e) */
2000 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
2001 		USB_DEVICE_ID_MX5000_RECEIVER_KBD_DEV),
2002 	 .driver_data = recvr_type_bluetooth},
2003 	{ /* Logitech MX5000 HID++ / bluetooth receiver mouse intf. (0xc70a) */
2004 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
2005 		USB_DEVICE_ID_MX5000_RECEIVER_MOUSE_DEV),
2006 	 .driver_data = recvr_type_bluetooth},
2007 	{ /* Logitech MX5500 HID++ / bluetooth receiver keyboard intf. (0xc71b) */
2008 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
2009 		USB_DEVICE_ID_MX5500_RECEIVER_KBD_DEV),
2010 	 .driver_data = recvr_type_bluetooth},
2011 	{ /* Logitech MX5500 HID++ / bluetooth receiver mouse intf. (0xc71c) */
2012 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
2013 		USB_DEVICE_ID_MX5500_RECEIVER_MOUSE_DEV),
2014 	 .driver_data = recvr_type_bluetooth},
2015 
2016 	{ /* Logitech Dinovo Edge HID++ / bluetooth receiver keyboard intf. (0xc713) */
2017 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
2018 		USB_DEVICE_ID_DINOVO_EDGE_RECEIVER_KBD_DEV),
2019 	 .driver_data = recvr_type_dinovo},
2020 	{ /* Logitech Dinovo Edge HID++ / bluetooth receiver mouse intf. (0xc714) */
2021 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
2022 		USB_DEVICE_ID_DINOVO_EDGE_RECEIVER_MOUSE_DEV),
2023 	 .driver_data = recvr_type_dinovo},
2024 	{ /* Logitech DiNovo Mini HID++ / bluetooth receiver mouse intf. (0xc71e) */
2025 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
2026 		USB_DEVICE_ID_DINOVO_MINI_RECEIVER_KBD_DEV),
2027 	 .driver_data = recvr_type_dinovo},
2028 	{ /* Logitech DiNovo Mini HID++ / bluetooth receiver keyboard intf. (0xc71f) */
2029 	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
2030 		USB_DEVICE_ID_DINOVO_MINI_RECEIVER_MOUSE_DEV),
2031 	 .driver_data = recvr_type_dinovo},
2032 	{}
2033 };
2034 
2035 MODULE_DEVICE_TABLE(hid, logi_dj_receivers);
2036 
2037 static struct hid_driver logi_djreceiver_driver = {
2038 	.name = "logitech-djreceiver",
2039 	.id_table = logi_dj_receivers,
2040 	.probe = logi_dj_probe,
2041 	.remove = logi_dj_remove,
2042 	.raw_event = logi_dj_raw_event,
2043 #ifdef CONFIG_PM
2044 	.reset_resume = logi_dj_reset_resume,
2045 #endif
2046 };
2047 
2048 module_hid_driver(logi_djreceiver_driver);
2049 
2050 MODULE_LICENSE("GPL");
2051 MODULE_AUTHOR("Logitech");
2052 MODULE_AUTHOR("Nestor Lopez Casado");
2053 MODULE_AUTHOR("nlopezcasad@logitech.com");
2054