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HID: logitech-dj: remove unused querying_devices variable
[mirror_ubuntu-jammy-kernel.git] / drivers / hid / hid-logitech-dj.c
CommitLineData
534a7b8e
NLC		 1/*
2 * HID driver for Logitech Unifying receivers
3 *
4 * Copyright (c) 2011 Logitech
5 */
6
7/*
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24
25#include <linux/device.h>
26#include <linux/hid.h>
27#include <linux/module.h>
8cb3746a 28#include <linux/kfifo.h>
82c0beb8 29#include <linux/delay.h>
44d27f7d 30#include <asm/unaligned.h>
534a7b8e 31#include "hid-ids.h"
8cb3746a
BT		 32
33#define DJ_MAX_PAIRED_DEVICES 6
4fcad95a 34#define DJ_MAX_NUMBER_NOTIFS 8
8cb3746a
BT		 35#define DJ_RECEIVER_INDEX 0
36#define DJ_DEVICE_INDEX_MIN 1
37#define DJ_DEVICE_INDEX_MAX 6
38
39#define DJREPORT_SHORT_LENGTH 15
40#define DJREPORT_LONG_LENGTH 32
41
42#define REPORT_ID_DJ_SHORT 0x20
43#define REPORT_ID_DJ_LONG 0x21
44
925f0f3e
BT		 45#define REPORT_ID_HIDPP_SHORT 0x10
46#define REPORT_ID_HIDPP_LONG 0x11
47
48#define HIDPP_REPORT_SHORT_LENGTH 7
49#define HIDPP_REPORT_LONG_LENGTH 20
50
51#define HIDPP_RECEIVER_INDEX 0xff
52
53#define REPORT_TYPE_RFREPORT_FIRST 0x01
8cb3746a
BT		 54#define REPORT_TYPE_RFREPORT_LAST 0x1F
55
56/* Command Switch to DJ mode */
57#define REPORT_TYPE_CMD_SWITCH 0x80
58#define CMD_SWITCH_PARAM_DEVBITFIELD 0x00
59#define CMD_SWITCH_PARAM_TIMEOUT_SECONDS 0x01
60#define TIMEOUT_NO_KEEPALIVE 0x00
61
62/* Command to Get the list of Paired devices */
63#define REPORT_TYPE_CMD_GET_PAIRED_DEVICES 0x81
64
65/* Device Paired Notification */
66#define REPORT_TYPE_NOTIF_DEVICE_PAIRED 0x41
67#define SPFUNCTION_MORE_NOTIF_EXPECTED 0x01
68#define SPFUNCTION_DEVICE_LIST_EMPTY 0x02
69#define DEVICE_PAIRED_PARAM_SPFUNCTION 0x00
70#define DEVICE_PAIRED_PARAM_EQUAD_ID_LSB 0x01
71#define DEVICE_PAIRED_PARAM_EQUAD_ID_MSB 0x02
72#define DEVICE_PAIRED_RF_REPORT_TYPE 0x03
73
74/* Device Un-Paired Notification */
75#define REPORT_TYPE_NOTIF_DEVICE_UNPAIRED 0x40
76
8cb3746a
BT		 77/* Connection Status Notification */
78#define REPORT_TYPE_NOTIF_CONNECTION_STATUS 0x42
79#define CONNECTION_STATUS_PARAM_STATUS 0x00
80#define STATUS_LINKLOSS 0x01
81
82/* Error Notification */
83#define REPORT_TYPE_NOTIF_ERROR 0x7F
84#define NOTIF_ERROR_PARAM_ETYPE 0x00
85#define ETYPE_KEEPALIVE_TIMEOUT 0x01
86
87/* supported DJ HID && RF report types */
88#define REPORT_TYPE_KEYBOARD 0x01
89#define REPORT_TYPE_MOUSE 0x02
90#define REPORT_TYPE_CONSUMER_CONTROL 0x03
91#define REPORT_TYPE_SYSTEM_CONTROL 0x04
92#define REPORT_TYPE_MEDIA_CENTER 0x08
93#define REPORT_TYPE_LEDS 0x0E
94
95/* RF Report types bitfield */
a17dd1f2
BT		 96#define STD_KEYBOARD BIT(1)
97#define STD_MOUSE BIT(2)
98#define MULTIMEDIA BIT(3)
99#define POWER_KEYS BIT(4)
100#define MEDIA_CENTER BIT(8)
101#define KBD_LEDS BIT(14)
8cb3746a 102
c0340412
BT		 103#define HIDPP_GET_LONG_REGISTER 0x83
104#define HIDPP_REG_PAIRING_INFORMATION 0xB5
105#define HIDPP_PAIRING_INFORMATION 0x20
106
8cb3746a
BT		 107struct dj_report {
108 u8 report_id;
109 u8 device_index;
110 u8 report_type;
111 u8 report_params[DJREPORT_SHORT_LENGTH - 3];
112};
113
7bb56a5f
BT		 114struct hidpp_event {
115 u8 report_id;
116 u8 device_index;
117 u8 sub_id;
118 u8 params[HIDPP_REPORT_LONG_LENGTH - 3U];
119} __packed;
120
8cb3746a
BT		 121struct dj_receiver_dev {
122 struct hid_device *hdev;
123 struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES +
124 DJ_DEVICE_INDEX_MIN];
125 struct work_struct work;
126 struct kfifo notif_fifo;
127 spinlock_t lock;
8cb3746a
BT		 128};
129
130struct dj_device {
131 struct hid_device *hdev;
132 struct dj_receiver_dev *dj_receiver_dev;
133 u32 reports_supported;
134 u8 device_index;
135};
534a7b8e 136
4fcad95a
BT		 137#define WORKITEM_TYPE_EMPTY 0
138#define WORKITEM_TYPE_PAIRED 1
139#define WORKITEM_TYPE_UNPAIRED 2
140#define WORKITEM_TYPE_UNKNOWN 255
141
142struct dj_workitem {
143 u8 type; /* WORKITEM_TYPE_* */
144 u8 device_index;
145 u8 quad_id_msb;
146 u8 quad_id_lsb;
147 u32 reports_supported;
148};
149
534a7b8e
NLC		 150/* Keyboard descriptor (1) */
151static const char kbd_descriptor[] = {
152 0x05, 0x01, /* USAGE_PAGE (generic Desktop) */
153 0x09, 0x06, /* USAGE (Keyboard) */
154 0xA1, 0x01, /* COLLECTION (Application) */
155 0x85, 0x01, /* REPORT_ID (1) */
156 0x95, 0x08, /* REPORT_COUNT (8) */
157 0x75, 0x01, /* REPORT_SIZE (1) */
158 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
159 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
160 0x05, 0x07, /* USAGE_PAGE (Keyboard) */
161 0x19, 0xE0, /* USAGE_MINIMUM (Left Control) */
162 0x29, 0xE7, /* USAGE_MAXIMUM (Right GUI) */
163 0x81, 0x02, /* INPUT (Data,Var,Abs) */
534a7b8e
NLC		 164 0x95, 0x06, /* REPORT_COUNT (6) */
165 0x75, 0x08, /* REPORT_SIZE (8) */
166 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
167 0x26, 0xFF, 0x00, /* LOGICAL_MAXIMUM (255) */
168 0x05, 0x07, /* USAGE_PAGE (Keyboard) */
169 0x19, 0x00, /* USAGE_MINIMUM (no event) */
170 0x2A, 0xFF, 0x00, /* USAGE_MAXIMUM (reserved) */
171 0x81, 0x00, /* INPUT (Data,Ary,Abs) */
0e40d356
BT		 172 0x85, 0x0e, /* REPORT_ID (14) */
173 0x05, 0x08, /* USAGE PAGE (LED page) */
174 0x95, 0x05, /* REPORT COUNT (5) */
175 0x75, 0x01, /* REPORT SIZE (1) */
176 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
177 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
178 0x19, 0x01, /* USAGE MINIMUM (1) */
179 0x29, 0x05, /* USAGE MAXIMUM (5) */
180 0x91, 0x02, /* OUTPUT (Data, Variable, Absolute) */
181 0x95, 0x01, /* REPORT COUNT (1) */
182 0x75, 0x03, /* REPORT SIZE (3) */
183 0x91, 0x01, /* OUTPUT (Constant) */
534a7b8e
NLC		 184 0xC0
185};
186
187/* Mouse descriptor (2) */
188static const char mse_descriptor[] = {
189 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
190 0x09, 0x02, /* USAGE (Mouse) */
191 0xA1, 0x01, /* COLLECTION (Application) */
192 0x85, 0x02, /* REPORT_ID = 2 */
193 0x09, 0x01, /* USAGE (pointer) */
194 0xA1, 0x00, /* COLLECTION (physical) */
195 0x05, 0x09, /* USAGE_PAGE (buttons) */
196 0x19, 0x01, /* USAGE_MIN (1) */
197 0x29, 0x10, /* USAGE_MAX (16) */
198 0x15, 0x00, /* LOGICAL_MIN (0) */
199 0x25, 0x01, /* LOGICAL_MAX (1) */
200 0x95, 0x10, /* REPORT_COUNT (16) */
201 0x75, 0x01, /* REPORT_SIZE (1) */
202 0x81, 0x02, /* INPUT (data var abs) */
203 0x05, 0x01, /* USAGE_PAGE (generic desktop) */
204 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */
205 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */
206 0x75, 0x0C, /* REPORT_SIZE (12) */
207 0x95, 0x02, /* REPORT_COUNT (2) */
208 0x09, 0x30, /* USAGE (X) */
209 0x09, 0x31, /* USAGE (Y) */
210 0x81, 0x06, /* INPUT */
211 0x15, 0x81, /* LOGICAL_MIN (-127) */
212 0x25, 0x7F, /* LOGICAL_MAX (127) */
213 0x75, 0x08, /* REPORT_SIZE (8) */
214 0x95, 0x01, /* REPORT_COUNT (1) */
215 0x09, 0x38, /* USAGE (wheel) */
216 0x81, 0x06, /* INPUT */
217 0x05, 0x0C, /* USAGE_PAGE(consumer) */
218 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */
219 0x95, 0x01, /* REPORT_COUNT (1) */
220 0x81, 0x06, /* INPUT */
221 0xC0, /* END_COLLECTION */
222 0xC0, /* END_COLLECTION */
223};
224
225/* Consumer Control descriptor (3) */
226static const char consumer_descriptor[] = {
227 0x05, 0x0C, /* USAGE_PAGE (Consumer Devices) */
228 0x09, 0x01, /* USAGE (Consumer Control) */
229 0xA1, 0x01, /* COLLECTION (Application) */
230 0x85, 0x03, /* REPORT_ID = 3 */
231 0x75, 0x10, /* REPORT_SIZE (16) */
232 0x95, 0x02, /* REPORT_COUNT (2) */
233 0x15, 0x01, /* LOGICAL_MIN (1) */
234 0x26, 0x8C, 0x02, /* LOGICAL_MAX (652) */
235 0x19, 0x01, /* USAGE_MIN (1) */
236 0x2A, 0x8C, 0x02, /* USAGE_MAX (652) */
237 0x81, 0x00, /* INPUT (Data Ary Abs) */
238 0xC0, /* END_COLLECTION */
239}; /* */
240
241/* System control descriptor (4) */
242static const char syscontrol_descriptor[] = {
243 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
244 0x09, 0x80, /* USAGE (System Control) */
245 0xA1, 0x01, /* COLLECTION (Application) */
246 0x85, 0x04, /* REPORT_ID = 4 */
247 0x75, 0x02, /* REPORT_SIZE (2) */
248 0x95, 0x01, /* REPORT_COUNT (1) */
249 0x15, 0x01, /* LOGICAL_MIN (1) */
250 0x25, 0x03, /* LOGICAL_MAX (3) */
251 0x09, 0x82, /* USAGE (System Sleep) */
252 0x09, 0x81, /* USAGE (System Power Down) */
253 0x09, 0x83, /* USAGE (System Wake Up) */
254 0x81, 0x60, /* INPUT (Data Ary Abs NPrf Null) */
255 0x75, 0x06, /* REPORT_SIZE (6) */
256 0x81, 0x03, /* INPUT (Cnst Var Abs) */
257 0xC0, /* END_COLLECTION */
258};
259
260/* Media descriptor (8) */
261static const char media_descriptor[] = {
262 0x06, 0xbc, 0xff, /* Usage Page 0xffbc */
263 0x09, 0x88, /* Usage 0x0088 */
264 0xa1, 0x01, /* BeginCollection */
265 0x85, 0x08, /* Report ID 8 */
266 0x19, 0x01, /* Usage Min 0x0001 */
267 0x29, 0xff, /* Usage Max 0x00ff */
268 0x15, 0x01, /* Logical Min 1 */
269 0x26, 0xff, 0x00, /* Logical Max 255 */
270 0x75, 0x08, /* Report Size 8 */
271 0x95, 0x01, /* Report Count 1 */
272 0x81, 0x00, /* Input */
273 0xc0, /* EndCollection */
274}; /* */
275
925f0f3e
BT		 276/* HIDPP descriptor */
277static const char hidpp_descriptor[] = {
278 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */
279 0x09, 0x01, /* Usage (Vendor Usage 1) */
280 0xa1, 0x01, /* Collection (Application) */
281 0x85, 0x10, /* Report ID (16) */
282 0x75, 0x08, /* Report Size (8) */
283 0x95, 0x06, /* Report Count (6) */
284 0x15, 0x00, /* Logical Minimum (0) */
285 0x26, 0xff, 0x00, /* Logical Maximum (255) */
286 0x09, 0x01, /* Usage (Vendor Usage 1) */
287 0x81, 0x00, /* Input (Data,Arr,Abs) */
288 0x09, 0x01, /* Usage (Vendor Usage 1) */
289 0x91, 0x00, /* Output (Data,Arr,Abs) */
290 0xc0, /* End Collection */
291 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */
292 0x09, 0x02, /* Usage (Vendor Usage 2) */
293 0xa1, 0x01, /* Collection (Application) */
294 0x85, 0x11, /* Report ID (17) */
295 0x75, 0x08, /* Report Size (8) */
296 0x95, 0x13, /* Report Count (19) */
297 0x15, 0x00, /* Logical Minimum (0) */
298 0x26, 0xff, 0x00, /* Logical Maximum (255) */
299 0x09, 0x02, /* Usage (Vendor Usage 2) */
300 0x81, 0x00, /* Input (Data,Arr,Abs) */
301 0x09, 0x02, /* Usage (Vendor Usage 2) */
302 0x91, 0x00, /* Output (Data,Arr,Abs) */
303 0xc0, /* End Collection */
304 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */
305 0x09, 0x04, /* Usage (Vendor Usage 0x04) */
306 0xa1, 0x01, /* Collection (Application) */
307 0x85, 0x20, /* Report ID (32) */
308 0x75, 0x08, /* Report Size (8) */
309 0x95, 0x0e, /* Report Count (14) */
310 0x15, 0x00, /* Logical Minimum (0) */
311 0x26, 0xff, 0x00, /* Logical Maximum (255) */
312 0x09, 0x41, /* Usage (Vendor Usage 0x41) */
313 0x81, 0x00, /* Input (Data,Arr,Abs) */
314 0x09, 0x41, /* Usage (Vendor Usage 0x41) */
315 0x91, 0x00, /* Output (Data,Arr,Abs) */
316 0x85, 0x21, /* Report ID (33) */
317 0x95, 0x1f, /* Report Count (31) */
318 0x15, 0x00, /* Logical Minimum (0) */
319 0x26, 0xff, 0x00, /* Logical Maximum (255) */
320 0x09, 0x42, /* Usage (Vendor Usage 0x42) */
321 0x81, 0x00, /* Input (Data,Arr,Abs) */
322 0x09, 0x42, /* Usage (Vendor Usage 0x42) */
323 0x91, 0x00, /* Output (Data,Arr,Abs) */
324 0xc0, /* End Collection */
325};
326
534a7b8e
NLC		 327/* Maximum size of all defined hid reports in bytes (including report id) */
328#define MAX_REPORT_SIZE 8
329
2a039bf5
HR		 330/* Make sure all descriptors are present here */
331#define MAX_RDESC_SIZE \
332 (sizeof(kbd_descriptor) + \
333 sizeof(mse_descriptor) + \
334 sizeof(consumer_descriptor) + \
335 sizeof(syscontrol_descriptor) + \
925f0f3e
BT		 336 sizeof(media_descriptor) + \
337 sizeof(hidpp_descriptor))
2a039bf5 338
534a7b8e
NLC		 339/* Number of possible hid report types that can be created by this driver.
340 *
341 * Right now, RF report types have the same report types (or report id's)
342 * than the hid report created from those RF reports. In the future
343 * this doesnt have to be true.
344 *
345 * For instance, RF report type 0x01 which has a size of 8 bytes, corresponds
346 * to hid report id 0x01, this is standard keyboard. Same thing applies to mice
347 * reports and consumer control, etc. If a new RF report is created, it doesn't
348 * has to have the same report id as its corresponding hid report, so an
349 * translation may have to take place for future report types.
350 */
351#define NUMBER_OF_HID_REPORTS 32
352static const u8 hid_reportid_size_map[NUMBER_OF_HID_REPORTS] = {
353 [1] = 8, /* Standard keyboard */
354 [2] = 8, /* Standard mouse */
355 [3] = 5, /* Consumer control */
356 [4] = 2, /* System control */
357 [8] = 2, /* Media Center */
358};
359
360
361#define LOGITECH_DJ_INTERFACE_NUMBER 0x02
362
534a7b8e
NLC		 363static struct hid_ll_driver logi_dj_ll_driver;
364
c63e0e37 365static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev);
534a7b8e
NLC		 366
367static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev *djrcv_dev,
4fcad95a 368 struct dj_workitem *workitem)
534a7b8e
NLC		 369{
370 /* Called in delayed work context */
371 struct dj_device *dj_dev;
372 unsigned long flags;
373
374 spin_lock_irqsave(&djrcv_dev->lock, flags);
4fcad95a
BT		 375 dj_dev = djrcv_dev->paired_dj_devices[workitem->device_index];
376 djrcv_dev->paired_dj_devices[workitem->device_index] = NULL;
534a7b8e
NLC		 377 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
378
379 if (dj_dev != NULL) {
380 hid_destroy_device(dj_dev->hdev);
381 kfree(dj_dev);
382 } else {
383 dev_err(&djrcv_dev->hdev->dev, "%s: can't destroy a NULL device\n",
384 __func__);
385 }
386}
387
388static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
4fcad95a 389 struct dj_workitem *workitem)
534a7b8e
NLC		 390{
391 /* Called in delayed work context */
392 struct hid_device *djrcv_hdev = djrcv_dev->hdev;
534a7b8e
NLC		 393 struct hid_device *dj_hiddev;
394 struct dj_device *dj_dev;
4fcad95a 395 u8 device_index = workitem->device_index;
534a7b8e
NLC		 396
397 /* Device index goes from 1 to 6, we need 3 bytes to store the
398 * semicolon, the index, and a null terminator
399 */
400 unsigned char tmpstr[3];
401
4fcad95a 402 if (djrcv_dev->paired_dj_devices[device_index]) {
c63e0e37
NLC		 403 /* The device is already known. No need to reallocate it. */
404 dbg_hid("%s: device is already known\n", __func__);
405 return;
406 }
407
534a7b8e
NLC		 408 dj_hiddev = hid_allocate_device();
409 if (IS_ERR(dj_hiddev)) {
410 dev_err(&djrcv_hdev->dev, "%s: hid_allocate_device failed\n",
411 __func__);
412 return;
413 }
414
415 dj_hiddev->ll_driver = &logi_dj_ll_driver;
534a7b8e
NLC		 416
417 dj_hiddev->dev.parent = &djrcv_hdev->dev;
418 dj_hiddev->bus = BUS_USB;
82c0beb8 419 dj_hiddev->vendor = djrcv_hdev->vendor;
4fcad95a
BT		 420 dj_hiddev->product = (workitem->quad_id_msb << 8) |
421 workitem->quad_id_lsb;
534a7b8e 422 snprintf(dj_hiddev->name, sizeof(dj_hiddev->name),
d610274b
BT		 423 "Logitech Unifying Device. Wireless PID:%04x",
424 dj_hiddev->product);
425
426 dj_hiddev->group = HID_GROUP_LOGITECH_DJ_DEVICE;
534a7b8e 427
82c0beb8 428 memcpy(dj_hiddev->phys, djrcv_hdev->phys, sizeof(djrcv_hdev->phys));
4fcad95a 429 snprintf(tmpstr, sizeof(tmpstr), ":%d", device_index);
534a7b8e
NLC		 430 strlcat(dj_hiddev->phys, tmpstr, sizeof(dj_hiddev->phys));
431
432 dj_dev = kzalloc(sizeof(struct dj_device), GFP_KERNEL);
433
434 if (!dj_dev) {
435 dev_err(&djrcv_hdev->dev, "%s: failed allocating dj_device\n",
436 __func__);
437 goto dj_device_allocate_fail;
438 }
439
4fcad95a 440 dj_dev->reports_supported = workitem->reports_supported;
534a7b8e
NLC		 441 dj_dev->hdev = dj_hiddev;
442 dj_dev->dj_receiver_dev = djrcv_dev;
4fcad95a 443 dj_dev->device_index = device_index;
534a7b8e
NLC		 444 dj_hiddev->driver_data = dj_dev;
445
4fcad95a 446 djrcv_dev->paired_dj_devices[device_index] = dj_dev;
534a7b8e
NLC		 447
448 if (hid_add_device(dj_hiddev)) {
449 dev_err(&djrcv_hdev->dev, "%s: failed adding dj_device\n",
450 __func__);
451 goto hid_add_device_fail;
452 }
453
454 return;
455
456hid_add_device_fail:
4fcad95a 457 djrcv_dev->paired_dj_devices[device_index] = NULL;
534a7b8e
NLC		 458 kfree(dj_dev);
459dj_device_allocate_fail:
460 hid_destroy_device(dj_hiddev);
461}
462
463static void delayedwork_callback(struct work_struct *work)
464{
465 struct dj_receiver_dev *djrcv_dev =
466 container_of(work, struct dj_receiver_dev, work);
467
4fcad95a 468 struct dj_workitem workitem;
534a7b8e
NLC		 469 unsigned long flags;
470 int count;
c63e0e37 471 int retval;
534a7b8e
NLC		 472
473 dbg_hid("%s\n", __func__);
474
475 spin_lock_irqsave(&djrcv_dev->lock, flags);
476
4fcad95a 477 count = kfifo_out(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
534a7b8e 478
4fcad95a 479 if (count != sizeof(workitem)) {
534a7b8e
NLC		 480 dev_err(&djrcv_dev->hdev->dev, "%s: workitem triggered without "
481 "notifications available\n", __func__);
482 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
483 return;
484 }
485
486 if (!kfifo_is_empty(&djrcv_dev->notif_fifo)) {
487 if (schedule_work(&djrcv_dev->work) == 0) {
488 dbg_hid("%s: did not schedule the work item, was "
489 "already queued\n", __func__);
490 }
491 }
492
493 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
494
4fcad95a
BT		 495 switch (workitem.type) {
496 case WORKITEM_TYPE_PAIRED:
497 logi_dj_recv_add_djhid_device(djrcv_dev, &workitem);
534a7b8e 498 break;
4fcad95a
BT		 499 case WORKITEM_TYPE_UNPAIRED:
500 logi_dj_recv_destroy_djhid_device(djrcv_dev, &workitem);
501 break;
502 case WORKITEM_TYPE_UNKNOWN:
503 retval = logi_dj_recv_query_paired_devices(djrcv_dev);
504 if (retval) {
505 dev_err(&djrcv_dev->hdev->dev,
506 "%s: logi_dj_recv_query_paired_devices error: %d\n",
507 __func__, retval);
508 }
509 break;
510 case WORKITEM_TYPE_EMPTY:
511 dbg_hid("%s: device list is empty\n", __func__);
512 break;
513 }
514}
515
516static void logi_dj_recv_queue_notification(struct dj_receiver_dev *djrcv_dev,
517 struct dj_report *dj_report)
518{
519 /* We are called from atomic context (tasklet && djrcv->lock held) */
520 struct dj_workitem workitem = {
521 .device_index = dj_report->device_index,
522 };
523
524 switch (dj_report->report_type) {
525 case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
526 workitem.type = WORKITEM_TYPE_PAIRED;
527 if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] &
528 SPFUNCTION_DEVICE_LIST_EMPTY) {
529 workitem.type = WORKITEM_TYPE_EMPTY;
530 break;
531 }
532 /* fall-through */
534a7b8e 533 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
4fcad95a
BT		 534 workitem.quad_id_msb =
535 dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB];
536 workitem.quad_id_lsb =
537 dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB];
538 workitem.reports_supported = get_unaligned_le32(
539 dj_report->report_params +
540 DEVICE_PAIRED_RF_REPORT_TYPE);
541 if (dj_report->report_type == REPORT_TYPE_NOTIF_DEVICE_UNPAIRED)
542 workitem.type = WORKITEM_TYPE_UNPAIRED;
534a7b8e
NLC		 543 break;
544 default:
c63e0e37
NLC		 545 /* A normal report (i. e. not belonging to a pair/unpair notification)
546 * arriving here, means that the report arrived but we did not have a
547 * paired dj_device associated to the report's device_index, this
548 * means that the original "device paired" notification corresponding
549 * to this dj_device never arrived to this driver. The reason is that
550 * hid-core discards all packets coming from a device while probe() is
551 * executing. */
4fcad95a
BT		 552 if (!djrcv_dev->paired_dj_devices[dj_report->device_index]) {
553 /*
554 * ok, we don't know the device, just re-ask the
555 * receiver for the list of connected devices in
556 * the delayed work callback.
557 */
558 workitem.type = WORKITEM_TYPE_UNKNOWN;
c63e0e37 559 }
534a7b8e 560 }
534a7b8e 561
4fcad95a 562 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
534a7b8e
NLC		 563
564 if (schedule_work(&djrcv_dev->work) == 0) {
565 dbg_hid("%s: did not schedule the work item, was already "
566 "queued\n", __func__);
567 }
568}
569
570static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev,
571 struct dj_report *dj_report)
572{
573 /* We are called from atomic context (tasklet && djrcv->lock held) */
574 unsigned int i;
575 u8 reportbuffer[MAX_REPORT_SIZE];
576 struct dj_device *djdev;
577
578 djdev = djrcv_dev->paired_dj_devices[dj_report->device_index];
579
534a7b8e
NLC		 580 memset(reportbuffer, 0, sizeof(reportbuffer));
581
582 for (i = 0; i < NUMBER_OF_HID_REPORTS; i++) {
583 if (djdev->reports_supported & (1 << i)) {
584 reportbuffer[0] = i;
585 if (hid_input_report(djdev->hdev,
586 HID_INPUT_REPORT,
587 reportbuffer,
588 hid_reportid_size_map[i], 1)) {
589 dbg_hid("hid_input_report error sending null "
590 "report\n");
591 }
592 }
593 }
594}
595
83898234
BT		 596static void logi_dj_recv_forward_dj(struct dj_receiver_dev *djrcv_dev,
597 struct dj_report *dj_report)
534a7b8e
NLC		 598{
599 /* We are called from atomic context (tasklet && djrcv->lock held) */
600 struct dj_device *dj_device;
601
602 dj_device = djrcv_dev->paired_dj_devices[dj_report->device_index];
603
534a7b8e
NLC		 604 if ((dj_report->report_type > ARRAY_SIZE(hid_reportid_size_map) - 1) ||
605 (hid_reportid_size_map[dj_report->report_type] == 0)) {
606 dbg_hid("invalid report type:%x\n", dj_report->report_type);
607 return;
608 }
609
610 if (hid_input_report(dj_device->hdev,
611 HID_INPUT_REPORT, &dj_report->report_type,
612 hid_reportid_size_map[dj_report->report_type], 1)) {
613 dbg_hid("hid_input_report error\n");
614 }
615}
616
83898234
BT		 617static void logi_dj_recv_forward_report(struct dj_device *dj_dev, u8 *data,
618 int size)
925f0f3e
BT		 619{
620 /* We are called from atomic context (tasklet && djrcv->lock held) */
621 if (hid_input_report(dj_dev->hdev, HID_INPUT_REPORT, data, size, 1))
622 dbg_hid("hid_input_report error\n");
623}
534a7b8e
NLC		 624
625static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev,
626 struct dj_report *dj_report)
627{
628 struct hid_device *hdev = djrcv_dev->hdev;
dcd9006b
BT		 629 struct hid_report *report;
630 struct hid_report_enum *output_report_enum;
631 u8 *data = (u8 *)(&dj_report->device_index);
297502ab 632 unsigned int i;
534a7b8e 633
dcd9006b
BT		 634 output_report_enum = &hdev->report_enum[HID_OUTPUT_REPORT];
635 report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT];
636
637 if (!report) {
638 dev_err(&hdev->dev, "%s: unable to find dj report\n", __func__);
534a7b8e
NLC		 639 return -ENODEV;
640 }
641
297502ab 642 for (i = 0; i < DJREPORT_SHORT_LENGTH - 1; i++)
dcd9006b
BT		 643 report->field[0]->value[i] = data[i];
644
83a44ac8 645 hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
534a7b8e 646
dcd9006b 647 return 0;
534a7b8e
NLC		 648}
649
650static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev)
651{
d8dc3494
MD		 652 struct dj_report *dj_report;
653 int retval;
534a7b8e 654
8a55ade7 655 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
d8dc3494
MD		 656 if (!dj_report)
657 return -ENOMEM;
658 dj_report->report_id = REPORT_ID_DJ_SHORT;
659 dj_report->device_index = 0xFF;
660 dj_report->report_type = REPORT_TYPE_CMD_GET_PAIRED_DEVICES;
661 retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
662 kfree(dj_report);
663 return retval;
534a7b8e
NLC		 664}
665
c63e0e37 666
534a7b8e
NLC		 667static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev,
668 unsigned timeout)
669{
6a9ddc89 670 struct hid_device *hdev = djrcv_dev->hdev;
d8dc3494 671 struct dj_report *dj_report;
6a9ddc89 672 u8 *buf;
d8dc3494 673 int retval;
534a7b8e 674
8a55ade7 675 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
d8dc3494
MD		 676 if (!dj_report)
677 return -ENOMEM;
678 dj_report->report_id = REPORT_ID_DJ_SHORT;
679 dj_report->device_index = 0xFF;
680 dj_report->report_type = REPORT_TYPE_CMD_SWITCH;
681 dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F;
682 dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] = (u8)timeout;
683 retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
42c22dbf
BT		 684
685 /*
686 * Ugly sleep to work around a USB 3.0 bug when the receiver is still
687 * processing the "switch-to-dj" command while we send an other command.
688 * 50 msec should gives enough time to the receiver to be ready.
689 */
690 msleep(50);
691
6a9ddc89
BT		 692 /*
693 * Magical bits to set up hidpp notifications when the dj devices
694 * are connected/disconnected.
695 *
696 * We can reuse dj_report because HIDPP_REPORT_SHORT_LENGTH is smaller
697 * than DJREPORT_SHORT_LENGTH.
698 */
699 buf = (u8 *)dj_report;
700
701 memset(buf, 0, HIDPP_REPORT_SHORT_LENGTH);
702
703 buf[0] = REPORT_ID_HIDPP_SHORT;
704 buf[1] = 0xFF;
705 buf[2] = 0x80;
706 buf[3] = 0x00;
707 buf[4] = 0x00;
708 buf[5] = 0x09;
709 buf[6] = 0x00;
710
711 hid_hw_raw_request(hdev, REPORT_ID_HIDPP_SHORT, buf,
712 HIDPP_REPORT_SHORT_LENGTH, HID_OUTPUT_REPORT,
713 HID_REQ_SET_REPORT);
714
715 kfree(dj_report);
d8dc3494 716 return retval;
534a7b8e
NLC		 717}
718
719
720static int logi_dj_ll_open(struct hid_device *hid)
721{
722 dbg_hid("%s:%s\n", __func__, hid->phys);
723 return 0;
724
725}
726
727static void logi_dj_ll_close(struct hid_device *hid)
728{
729 dbg_hid("%s:%s\n", __func__, hid->phys);
730}
731
8dba3026
BT		 732/*
733 * Register 0xB5 is "pairing information". It is solely intended for the
734 * receiver, so do not overwrite the device index.
735 */
c0340412
BT		 736static u8 unifying_pairing_query[] = { REPORT_ID_HIDPP_SHORT,
737 HIDPP_RECEIVER_INDEX,
738 HIDPP_GET_LONG_REGISTER,
739 HIDPP_REG_PAIRING_INFORMATION };
740static u8 unifying_pairing_answer[] = { REPORT_ID_HIDPP_LONG,
741 HIDPP_RECEIVER_INDEX,
742 HIDPP_GET_LONG_REGISTER,
743 HIDPP_REG_PAIRING_INFORMATION };
33797820 744
bd27e202
BT		 745static int logi_dj_ll_raw_request(struct hid_device *hid,
746 unsigned char reportnum, __u8 *buf,
747 size_t count, unsigned char report_type,
748 int reqtype)
534a7b8e 749{
0e40d356
BT		 750 struct dj_device *djdev = hid->driver_data;
751 struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev;
752 u8 *out_buf;
753 int ret;
534a7b8e 754
925f0f3e
BT		 755 if ((buf[0] == REPORT_ID_HIDPP_SHORT) ||
756 (buf[0] == REPORT_ID_HIDPP_LONG)) {
757 if (count < 2)
758 return -EINVAL;
759
33797820
BT		 760 /* special case where we should not overwrite
761 * the device_index */
8dba3026
BT		 762 if (count == 7 && !memcmp(buf, unifying_pairing_query,
763 sizeof(unifying_pairing_query)))
764 buf[4] = (buf[4] & 0xf0) | (djdev->device_index - 1);
33797820
BT		 765 else
766 buf[1] = djdev->device_index;
925f0f3e
BT		 767 return hid_hw_raw_request(djrcv_dev->hdev, reportnum, buf,
768 count, report_type, reqtype);
769 }
770
0e40d356
BT		 771 if (buf[0] != REPORT_TYPE_LEDS)
772 return -EINVAL;
773
774 out_buf = kzalloc(DJREPORT_SHORT_LENGTH, GFP_ATOMIC);
775 if (!out_buf)
776 return -ENOMEM;
777
51217e69 778 if (count > DJREPORT_SHORT_LENGTH - 2)
0e40d356
BT		 779 count = DJREPORT_SHORT_LENGTH - 2;
780
781 out_buf[0] = REPORT_ID_DJ_SHORT;
782 out_buf[1] = djdev->device_index;
783 memcpy(out_buf + 2, buf, count);
784
0e40d356 785 ret = hid_hw_raw_request(djrcv_dev->hdev, out_buf[0], out_buf,
bd27e202 786 DJREPORT_SHORT_LENGTH, report_type, reqtype);
0e40d356
BT		 787
788 kfree(out_buf);
789 return ret;
534a7b8e
NLC		 790}
791
6d603326 792static void rdcat(char *rdesc, unsigned int *rsize, const char *data, unsigned int size)
2a039bf5 793{
6d603326 794 memcpy(rdesc + *rsize, data, size);
2a039bf5
HR		 795 *rsize += size;
796}
797
534a7b8e
NLC		 798static int logi_dj_ll_parse(struct hid_device *hid)
799{
800 struct dj_device *djdev = hid->driver_data;
2a039bf5
HR		 801 unsigned int rsize = 0;
802 char *rdesc;
534a7b8e
NLC		 803 int retval;
804
805 dbg_hid("%s\n", __func__);
806
807 djdev->hdev->version = 0x0111;
808 djdev->hdev->country = 0x00;
809
2a039bf5
HR		 810 rdesc = kmalloc(MAX_RDESC_SIZE, GFP_KERNEL);
811 if (!rdesc)
812 return -ENOMEM;
813
534a7b8e
NLC		 814 if (djdev->reports_supported & STD_KEYBOARD) {
815 dbg_hid("%s: sending a kbd descriptor, reports_supported: %x\n",
816 __func__, djdev->reports_supported);
6d603326 817 rdcat(rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor));
534a7b8e
NLC		 818 }
819
820 if (djdev->reports_supported & STD_MOUSE) {
821 dbg_hid("%s: sending a mouse descriptor, reports_supported: "
822 "%x\n", __func__, djdev->reports_supported);
6d603326 823 rdcat(rdesc, &rsize, mse_descriptor, sizeof(mse_descriptor));
534a7b8e
NLC		 824 }
825
826 if (djdev->reports_supported & MULTIMEDIA) {
827 dbg_hid("%s: sending a multimedia report descriptor: %x\n",
828 __func__, djdev->reports_supported);
6d603326 829 rdcat(rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor));
534a7b8e
NLC		 830 }
831
832 if (djdev->reports_supported & POWER_KEYS) {
833 dbg_hid("%s: sending a power keys report descriptor: %x\n",
834 __func__, djdev->reports_supported);
6d603326 835 rdcat(rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor));
534a7b8e
NLC		 836 }
837
838 if (djdev->reports_supported & MEDIA_CENTER) {
839 dbg_hid("%s: sending a media center report descriptor: %x\n",
840 __func__, djdev->reports_supported);
6d603326 841 rdcat(rdesc, &rsize, media_descriptor, sizeof(media_descriptor));
534a7b8e
NLC		 842 }
843
844 if (djdev->reports_supported & KBD_LEDS) {
845 dbg_hid("%s: need to send kbd leds report descriptor: %x\n",
846 __func__, djdev->reports_supported);
847 }
848
925f0f3e
BT		 849 rdcat(rdesc, &rsize, hidpp_descriptor, sizeof(hidpp_descriptor));
850
2a039bf5
HR		 851 retval = hid_parse_report(hid, rdesc, rsize);
852 kfree(rdesc);
853
854 return retval;
534a7b8e
NLC		 855}
856
534a7b8e
NLC		 857static int logi_dj_ll_start(struct hid_device *hid)
858{
859 dbg_hid("%s\n", __func__);
860 return 0;
861}
862
863static void logi_dj_ll_stop(struct hid_device *hid)
864{
865 dbg_hid("%s\n", __func__);
866}
867
868
869static struct hid_ll_driver logi_dj_ll_driver = {
870 .parse = logi_dj_ll_parse,
871 .start = logi_dj_ll_start,
872 .stop = logi_dj_ll_stop,
873 .open = logi_dj_ll_open,
874 .close = logi_dj_ll_close,
bd27e202 875 .raw_request = logi_dj_ll_raw_request,
534a7b8e
NLC		 876};
877
925f0f3e 878static int logi_dj_dj_event(struct hid_device *hdev,
534a7b8e
NLC		 879 struct hid_report *report, u8 *data,
880 int size)
881{
882 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
883 struct dj_report *dj_report = (struct dj_report *) data;
884 unsigned long flags;
534a7b8e 885
925f0f3e
BT		 886 /*
887 * Here we receive all data coming from iface 2, there are 3 cases:
534a7b8e 888 *
925f0f3e
BT		 889 * 1) Data is intended for this driver i. e. data contains arrival,
890 * departure, etc notifications, in which case we queue them for delayed
891 * processing by the work queue. We return 1 to hid-core as no further
892 * processing is required from it.
534a7b8e 893 *
925f0f3e
BT		 894 * 2) Data informs a connection change, if the change means rf link
895 * loss, then we must send a null report to the upper layer to discard
896 * potentially pressed keys that may be repeated forever by the input
897 * layer. Return 1 to hid-core as no further processing is required.
534a7b8e 898 *
925f0f3e
BT		 899 * 3) Data is an actual input event from a paired DJ device in which
900 * case we forward it to the correct hid device (via hid_input_report()
901 * ) and return 1 so hid-core does not anything else with it.
534a7b8e 902 */
5abfe85c 903
ad3e14d7
JK		 904 if ((dj_report->device_index < DJ_DEVICE_INDEX_MIN) ||
905 (dj_report->device_index > DJ_DEVICE_INDEX_MAX)) {
5abfe85c
BT		 906 /*
907 * Device index is wrong, bail out.
908 * This driver can ignore safely the receiver notifications,
909 * so ignore those reports too.
910 */
911 if (dj_report->device_index != DJ_RECEIVER_INDEX)
912 dev_err(&hdev->dev, "%s: invalid device index:%d\n",
ad3e14d7
JK		 913 __func__, dj_report->device_index);
914 return false;
915 }
534a7b8e
NLC		 916
917 spin_lock_irqsave(&djrcv_dev->lock, flags);
368d4e59
BT		 918
919 if (!djrcv_dev->paired_dj_devices[dj_report->device_index]) {
920 /* received an event for an unknown device, bail out */
921 logi_dj_recv_queue_notification(djrcv_dev, dj_report);
922 goto out;
923 }
924
5abfe85c
BT		 925 switch (dj_report->report_type) {
926 case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
368d4e59
BT		 927 /* pairing notifications are handled above the switch */
928 break;
5abfe85c
BT		 929 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
930 logi_dj_recv_queue_notification(djrcv_dev, dj_report);
931 break;
932 case REPORT_TYPE_NOTIF_CONNECTION_STATUS:
933 if (dj_report->report_params[CONNECTION_STATUS_PARAM_STATUS] ==
934 STATUS_LINKLOSS) {
935 logi_dj_recv_forward_null_report(djrcv_dev, dj_report);
534a7b8e 936 }
5abfe85c
BT		 937 break;
938 default:
83898234 939 logi_dj_recv_forward_dj(djrcv_dev, dj_report);
534a7b8e 940 }
368d4e59
BT		 941
942out:
534a7b8e
NLC		 943 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
944
5abfe85c 945 return true;
534a7b8e
NLC		 946}
947
925f0f3e
BT		 948static int logi_dj_hidpp_event(struct hid_device *hdev,
949 struct hid_report *report, u8 *data,
950 int size)
951{
952 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
7bb56a5f 953 struct hidpp_event *hidpp_report = (struct hidpp_event *) data;
925f0f3e 954 unsigned long flags;
7bb56a5f 955 u8 device_index = hidpp_report->device_index;
925f0f3e 956
33797820
BT		 957 if (device_index == HIDPP_RECEIVER_INDEX) {
958 /* special case were the device wants to know its unifying
959 * name */
960 if (size == HIDPP_REPORT_LONG_LENGTH &&
8dba3026
BT		 961 !memcmp(data, unifying_pairing_answer,
962 sizeof(unifying_pairing_answer)))
33797820
BT		 963 device_index = (data[4] & 0x0F) + 1;
964 else
965 return false;
966 }
925f0f3e
BT		 967
968 /*
969 * Data is from the HID++ collection, in this case, we forward the
970 * data to the corresponding child dj device and return 0 to hid-core
971 * so he data also goes to the hidraw device of the receiver. This
972 * allows a user space application to implement the full HID++ routing
973 * via the receiver.
974 */
975
976 if ((device_index < DJ_DEVICE_INDEX_MIN) ||
977 (device_index > DJ_DEVICE_INDEX_MAX)) {
978 /*
979 * Device index is wrong, bail out.
980 * This driver can ignore safely the receiver notifications,
981 * so ignore those reports too.
982 */
983 dev_err(&hdev->dev, "%s: invalid device index:%d\n",
7bb56a5f 984 __func__, hidpp_report->device_index);
925f0f3e
BT		 985 return false;
986 }
987
988 spin_lock_irqsave(&djrcv_dev->lock, flags);
989
990 if (!djrcv_dev->paired_dj_devices[device_index])
991 /* received an event for an unknown device, bail out */
992 goto out;
993
83898234
BT		 994 logi_dj_recv_forward_report(djrcv_dev->paired_dj_devices[device_index],
995 data, size);
925f0f3e
BT		 996
997out:
998 spin_unlock_irqrestore(&djrcv_dev->lock, flags);
999
1000 return false;
1001}
1002
1003static int logi_dj_raw_event(struct hid_device *hdev,
1004 struct hid_report *report, u8 *data,
1005 int size)
1006{
1007 dbg_hid("%s, size:%d\n", __func__, size);
1008
1009 switch (data[0]) {
1010 case REPORT_ID_DJ_SHORT:
f254ae93
PW		 1011 if (size != DJREPORT_SHORT_LENGTH) {
1012 dev_err(&hdev->dev, "DJ report of bad size (%d)", size);
1013 return false;
1014 }
925f0f3e
BT		 1015 return logi_dj_dj_event(hdev, report, data, size);
1016 case REPORT_ID_HIDPP_SHORT:
f254ae93
PW		 1017 if (size != HIDPP_REPORT_SHORT_LENGTH) {
1018 dev_err(&hdev->dev,
1019 "Short HID++ report of bad size (%d)", size);
1020 return false;
1021 }
1022 return logi_dj_hidpp_event(hdev, report, data, size);
925f0f3e 1023 case REPORT_ID_HIDPP_LONG:
f254ae93
PW		 1024 if (size != HIDPP_REPORT_LONG_LENGTH) {
1025 dev_err(&hdev->dev,
1026 "Long HID++ report of bad size (%d)", size);
1027 return false;
1028 }
925f0f3e
BT		 1029 return logi_dj_hidpp_event(hdev, report, data, size);
1030 }
1031
1032 return false;
1033}
1034
534a7b8e
NLC		 1035static int logi_dj_probe(struct hid_device *hdev,
1036 const struct hid_device_id *id)
1037{
82c0beb8
BT		 1038 struct hid_report_enum *rep_enum;
1039 struct hid_report *rep;
534a7b8e 1040 struct dj_receiver_dev *djrcv_dev;
82c0beb8 1041 bool has_hidpp = false;
534a7b8e
NLC		 1042 int retval;
1043
82c0beb8
BT		 1044 /*
1045 * Call to usbhid to fetch the HID descriptors of the current
1046 * interface subsequently call to the hid/hid-core to parse the
1047 * fetched descriptors.
1048 */
1049 retval = hid_parse(hdev);
1050 if (retval) {
1051 dev_err(&hdev->dev,
1052 "%s:parse failed\n", __func__);
1053 return retval;
1054 }
534a7b8e 1055
82c0beb8
BT		 1056 rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
1057
1058 /*
1059 * Check for the HID++ application.
1060 * Note: we should theoretically check for HID++ and DJ
1061 * collections, but this will do.
1062 */
1063 list_for_each_entry(rep, &rep_enum->report_list, list) {
1064 if (rep->application == 0xff000001)
1065 has_hidpp = true;
534a7b8e
NLC		 1066 }
1067
82c0beb8
BT		 1068 /*
1069 * Ignore interfaces without DJ/HID++ collection, they will not carry
1070 * any data, dont create any hid_device for them.
1071 */
1072 if (!has_hidpp)
1073 return -ENODEV;
1074
1075 /* Treat DJ/HID++ interface */
534a7b8e
NLC		 1076
1077 djrcv_dev = kzalloc(sizeof(struct dj_receiver_dev), GFP_KERNEL);
1078 if (!djrcv_dev) {
1079 dev_err(&hdev->dev,
1080 "%s:failed allocating dj_receiver_dev\n", __func__);
1081 return -ENOMEM;
1082 }
1083 djrcv_dev->hdev = hdev;
1084 INIT_WORK(&djrcv_dev->work, delayedwork_callback);
1085 spin_lock_init(&djrcv_dev->lock);
1086 if (kfifo_alloc(&djrcv_dev->notif_fifo,
4fcad95a 1087 DJ_MAX_NUMBER_NOTIFS * sizeof(struct dj_workitem),
534a7b8e
NLC		 1088 GFP_KERNEL)) {
1089 dev_err(&hdev->dev,
1090 "%s:failed allocating notif_fifo\n", __func__);
1091 kfree(djrcv_dev);
1092 return -ENOMEM;
1093 }
1094 hid_set_drvdata(hdev, djrcv_dev);
1095
297502ab 1096
534a7b8e
NLC		 1097 /* Starts the usb device and connects to upper interfaces hiddev and
1098 * hidraw */
1099 retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1100 if (retval) {
1101 dev_err(&hdev->dev,
1102 "%s:hid_hw_start returned error\n", __func__);
1103 goto hid_hw_start_fail;
1104 }
1105
1106 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0);
1107 if (retval < 0) {
1108 dev_err(&hdev->dev,
1109 "%s:logi_dj_recv_switch_to_dj_mode returned error:%d\n",
1110 __func__, retval);
1111 goto switch_to_dj_mode_fail;
1112 }
1113
1114 /* This is enabling the polling urb on the IN endpoint */
ddf7540e 1115 retval = hid_hw_open(hdev);
534a7b8e 1116 if (retval < 0) {
ddf7540e
BT		 1117 dev_err(&hdev->dev, "%s:hid_hw_open returned error:%d\n",
1118 __func__, retval);
534a7b8e
NLC		 1119 goto llopen_failed;
1120 }
1121
a9dd22b7
AR		 1122 /* Allow incoming packets to arrive: */
1123 hid_device_io_start(hdev);
1124
534a7b8e
NLC		 1125 retval = logi_dj_recv_query_paired_devices(djrcv_dev);
1126 if (retval < 0) {
1127 dev_err(&hdev->dev, "%s:logi_dj_recv_query_paired_devices "
1128 "error:%d\n", __func__, retval);
1129 goto logi_dj_recv_query_paired_devices_failed;
1130 }
1131
1132 return retval;
1133
1134logi_dj_recv_query_paired_devices_failed:
ddf7540e 1135 hid_hw_close(hdev);
534a7b8e
NLC		 1136
1137llopen_failed:
1138switch_to_dj_mode_fail:
1139 hid_hw_stop(hdev);
1140
1141hid_hw_start_fail:
534a7b8e
NLC		 1142 kfifo_free(&djrcv_dev->notif_fifo);
1143 kfree(djrcv_dev);
534a7b8e
NLC		 1144 return retval;
1145
1146}
1147
1148#ifdef CONFIG_PM
1149static int logi_dj_reset_resume(struct hid_device *hdev)
1150{
1151 int retval;
1152 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1153
1154 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0);
1155 if (retval < 0) {
1156 dev_err(&hdev->dev,
1157 "%s:logi_dj_recv_switch_to_dj_mode returned error:%d\n",
1158 __func__, retval);
1159 }
1160
1161 return 0;
1162}
1163#endif
1164
1165static void logi_dj_remove(struct hid_device *hdev)
1166{
1167 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
1168 struct dj_device *dj_dev;
1169 int i;
1170
1171 dbg_hid("%s\n", __func__);
1172
1173 cancel_work_sync(&djrcv_dev->work);
1174
ddf7540e 1175 hid_hw_close(hdev);
534a7b8e
NLC		 1176 hid_hw_stop(hdev);
1177
1178 /* I suppose that at this point the only context that can access
1179 * the djrecv_data is this thread as the work item is guaranteed to
1180 * have finished and no more raw_event callbacks should arrive after
1181 * the remove callback was triggered so no locks are put around the
1182 * code below */
844580ff 1183 for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) {
534a7b8e
NLC		 1184 dj_dev = djrcv_dev->paired_dj_devices[i];
1185 if (dj_dev != NULL) {
1186 hid_destroy_device(dj_dev->hdev);
1187 kfree(dj_dev);
1188 djrcv_dev->paired_dj_devices[i] = NULL;
1189 }
1190 }
1191
1192 kfifo_free(&djrcv_dev->notif_fifo);
1193 kfree(djrcv_dev);
534a7b8e
NLC		 1194}
1195
534a7b8e
NLC		 1196static const struct hid_device_id logi_dj_receivers[] = {
1197 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1198 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER)},
1199 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
1200 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2)},
1201 {}
1202};
1203
1204MODULE_DEVICE_TABLE(hid, logi_dj_receivers);
1205
1206static struct hid_driver logi_djreceiver_driver = {
1207 .name = "logitech-djreceiver",
1208 .id_table = logi_dj_receivers,
1209 .probe = logi_dj_probe,
1210 .remove = logi_dj_remove,
1211 .raw_event = logi_dj_raw_event,
1212#ifdef CONFIG_PM
1213 .reset_resume = logi_dj_reset_resume,
1214#endif
1215};
1216
ab94e562 1217module_hid_driver(logi_djreceiver_driver);
534a7b8e 1218
534a7b8e
NLC		 1219MODULE_LICENSE("GPL");
1220MODULE_AUTHOR("Logitech");
1221MODULE_AUTHOR("Nestor Lopez Casado");
1222MODULE_AUTHOR("nlopezcasad@logitech.com");
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