2 * HID driver for Logitech Unifying receivers
4 * Copyright (c) 2011 Logitech
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.
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.
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
25 #include <linux/device.h>
26 #include <linux/hid.h>
27 #include <linux/module.h>
28 #include <linux/usb.h>
29 #include <asm/unaligned.h>
30 #include "usbhid/usbhid.h"
32 #include "hid-logitech-dj.h"
34 /* Keyboard descriptor (1) */
35 static const char kbd_descriptor
[] = {
36 0x05, 0x01, /* USAGE_PAGE (generic Desktop) */
37 0x09, 0x06, /* USAGE (Keyboard) */
38 0xA1, 0x01, /* COLLECTION (Application) */
39 0x85, 0x01, /* REPORT_ID (1) */
40 0x95, 0x08, /* REPORT_COUNT (8) */
41 0x75, 0x01, /* REPORT_SIZE (1) */
42 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
43 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
44 0x05, 0x07, /* USAGE_PAGE (Keyboard) */
45 0x19, 0xE0, /* USAGE_MINIMUM (Left Control) */
46 0x29, 0xE7, /* USAGE_MAXIMUM (Right GUI) */
47 0x81, 0x02, /* INPUT (Data,Var,Abs) */
48 0x95, 0x05, /* REPORT COUNT (5) */
49 0x05, 0x08, /* USAGE PAGE (LED page) */
50 0x19, 0x01, /* USAGE MINIMUM (1) */
51 0x29, 0x05, /* USAGE MAXIMUM (5) */
52 0x91, 0x02, /* OUTPUT (Data, Variable, Absolute) */
53 0x95, 0x01, /* REPORT COUNT (1) */
54 0x75, 0x03, /* REPORT SIZE (3) */
55 0x91, 0x01, /* OUTPUT (Constant) */
56 0x95, 0x06, /* REPORT_COUNT (6) */
57 0x75, 0x08, /* REPORT_SIZE (8) */
58 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
59 0x26, 0xFF, 0x00, /* LOGICAL_MAXIMUM (255) */
60 0x05, 0x07, /* USAGE_PAGE (Keyboard) */
61 0x19, 0x00, /* USAGE_MINIMUM (no event) */
62 0x2A, 0xFF, 0x00, /* USAGE_MAXIMUM (reserved) */
63 0x81, 0x00, /* INPUT (Data,Ary,Abs) */
67 /* Mouse descriptor (2) */
68 static const char mse_descriptor
[] = {
69 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
70 0x09, 0x02, /* USAGE (Mouse) */
71 0xA1, 0x01, /* COLLECTION (Application) */
72 0x85, 0x02, /* REPORT_ID = 2 */
73 0x09, 0x01, /* USAGE (pointer) */
74 0xA1, 0x00, /* COLLECTION (physical) */
75 0x05, 0x09, /* USAGE_PAGE (buttons) */
76 0x19, 0x01, /* USAGE_MIN (1) */
77 0x29, 0x10, /* USAGE_MAX (16) */
78 0x15, 0x00, /* LOGICAL_MIN (0) */
79 0x25, 0x01, /* LOGICAL_MAX (1) */
80 0x95, 0x10, /* REPORT_COUNT (16) */
81 0x75, 0x01, /* REPORT_SIZE (1) */
82 0x81, 0x02, /* INPUT (data var abs) */
83 0x05, 0x01, /* USAGE_PAGE (generic desktop) */
84 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */
85 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */
86 0x75, 0x0C, /* REPORT_SIZE (12) */
87 0x95, 0x02, /* REPORT_COUNT (2) */
88 0x09, 0x30, /* USAGE (X) */
89 0x09, 0x31, /* USAGE (Y) */
90 0x81, 0x06, /* INPUT */
91 0x15, 0x81, /* LOGICAL_MIN (-127) */
92 0x25, 0x7F, /* LOGICAL_MAX (127) */
93 0x75, 0x08, /* REPORT_SIZE (8) */
94 0x95, 0x01, /* REPORT_COUNT (1) */
95 0x09, 0x38, /* USAGE (wheel) */
96 0x81, 0x06, /* INPUT */
97 0x05, 0x0C, /* USAGE_PAGE(consumer) */
98 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */
99 0x95, 0x01, /* REPORT_COUNT (1) */
100 0x81, 0x06, /* INPUT */
101 0xC0, /* END_COLLECTION */
102 0xC0, /* END_COLLECTION */
105 /* Consumer Control descriptor (3) */
106 static const char consumer_descriptor
[] = {
107 0x05, 0x0C, /* USAGE_PAGE (Consumer Devices) */
108 0x09, 0x01, /* USAGE (Consumer Control) */
109 0xA1, 0x01, /* COLLECTION (Application) */
110 0x85, 0x03, /* REPORT_ID = 3 */
111 0x75, 0x10, /* REPORT_SIZE (16) */
112 0x95, 0x02, /* REPORT_COUNT (2) */
113 0x15, 0x01, /* LOGICAL_MIN (1) */
114 0x26, 0x8C, 0x02, /* LOGICAL_MAX (652) */
115 0x19, 0x01, /* USAGE_MIN (1) */
116 0x2A, 0x8C, 0x02, /* USAGE_MAX (652) */
117 0x81, 0x00, /* INPUT (Data Ary Abs) */
118 0xC0, /* END_COLLECTION */
121 /* System control descriptor (4) */
122 static const char syscontrol_descriptor
[] = {
123 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
124 0x09, 0x80, /* USAGE (System Control) */
125 0xA1, 0x01, /* COLLECTION (Application) */
126 0x85, 0x04, /* REPORT_ID = 4 */
127 0x75, 0x02, /* REPORT_SIZE (2) */
128 0x95, 0x01, /* REPORT_COUNT (1) */
129 0x15, 0x01, /* LOGICAL_MIN (1) */
130 0x25, 0x03, /* LOGICAL_MAX (3) */
131 0x09, 0x82, /* USAGE (System Sleep) */
132 0x09, 0x81, /* USAGE (System Power Down) */
133 0x09, 0x83, /* USAGE (System Wake Up) */
134 0x81, 0x60, /* INPUT (Data Ary Abs NPrf Null) */
135 0x75, 0x06, /* REPORT_SIZE (6) */
136 0x81, 0x03, /* INPUT (Cnst Var Abs) */
137 0xC0, /* END_COLLECTION */
140 /* Media descriptor (8) */
141 static const char media_descriptor
[] = {
142 0x06, 0xbc, 0xff, /* Usage Page 0xffbc */
143 0x09, 0x88, /* Usage 0x0088 */
144 0xa1, 0x01, /* BeginCollection */
145 0x85, 0x08, /* Report ID 8 */
146 0x19, 0x01, /* Usage Min 0x0001 */
147 0x29, 0xff, /* Usage Max 0x00ff */
148 0x15, 0x01, /* Logical Min 1 */
149 0x26, 0xff, 0x00, /* Logical Max 255 */
150 0x75, 0x08, /* Report Size 8 */
151 0x95, 0x01, /* Report Count 1 */
152 0x81, 0x00, /* Input */
153 0xc0, /* EndCollection */
156 /* Maximum size of all defined hid reports in bytes (including report id) */
157 #define MAX_REPORT_SIZE 8
159 /* Make sure all descriptors are present here */
160 #define MAX_RDESC_SIZE \
161 (sizeof(kbd_descriptor) + \
162 sizeof(mse_descriptor) + \
163 sizeof(consumer_descriptor) + \
164 sizeof(syscontrol_descriptor) + \
165 sizeof(media_descriptor))
167 /* Number of possible hid report types that can be created by this driver.
169 * Right now, RF report types have the same report types (or report id's)
170 * than the hid report created from those RF reports. In the future
171 * this doesnt have to be true.
173 * For instance, RF report type 0x01 which has a size of 8 bytes, corresponds
174 * to hid report id 0x01, this is standard keyboard. Same thing applies to mice
175 * reports and consumer control, etc. If a new RF report is created, it doesn't
176 * has to have the same report id as its corresponding hid report, so an
177 * translation may have to take place for future report types.
179 #define NUMBER_OF_HID_REPORTS 32
180 static const u8 hid_reportid_size_map
[NUMBER_OF_HID_REPORTS
] = {
181 [1] = 8, /* Standard keyboard */
182 [2] = 8, /* Standard mouse */
183 [3] = 5, /* Consumer control */
184 [4] = 2, /* System control */
185 [8] = 2, /* Media Center */
189 #define LOGITECH_DJ_INTERFACE_NUMBER 0x02
191 static struct hid_ll_driver logi_dj_ll_driver
;
193 static int logi_dj_output_hidraw_report(struct hid_device
*hid
, u8
* buf
,
195 unsigned char report_type
);
196 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev
*djrcv_dev
);
198 static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev
*djrcv_dev
,
199 struct dj_report
*dj_report
)
201 /* Called in delayed work context */
202 struct dj_device
*dj_dev
;
205 spin_lock_irqsave(&djrcv_dev
->lock
, flags
);
206 dj_dev
= djrcv_dev
->paired_dj_devices
[dj_report
->device_index
];
207 djrcv_dev
->paired_dj_devices
[dj_report
->device_index
] = NULL
;
208 spin_unlock_irqrestore(&djrcv_dev
->lock
, flags
);
210 if (dj_dev
!= NULL
) {
211 hid_destroy_device(dj_dev
->hdev
);
214 dev_err(&djrcv_dev
->hdev
->dev
, "%s: can't destroy a NULL device\n",
219 static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev
*djrcv_dev
,
220 struct dj_report
*dj_report
)
222 /* Called in delayed work context */
223 struct hid_device
*djrcv_hdev
= djrcv_dev
->hdev
;
224 struct usb_interface
*intf
= to_usb_interface(djrcv_hdev
->dev
.parent
);
225 struct usb_device
*usbdev
= interface_to_usbdev(intf
);
226 struct hid_device
*dj_hiddev
;
227 struct dj_device
*dj_dev
;
229 /* Device index goes from 1 to 6, we need 3 bytes to store the
230 * semicolon, the index, and a null terminator
232 unsigned char tmpstr
[3];
234 if (dj_report
->report_params
[DEVICE_PAIRED_PARAM_SPFUNCTION
] &
235 SPFUNCTION_DEVICE_LIST_EMPTY
) {
236 dbg_hid("%s: device list is empty\n", __func__
);
237 djrcv_dev
->querying_devices
= false;
241 if ((dj_report
->device_index
< DJ_DEVICE_INDEX_MIN
) ||
242 (dj_report
->device_index
> DJ_DEVICE_INDEX_MAX
)) {
243 dev_err(&djrcv_hdev
->dev
, "%s: invalid device index:%d\n",
244 __func__
, dj_report
->device_index
);
248 if (djrcv_dev
->paired_dj_devices
[dj_report
->device_index
]) {
249 /* The device is already known. No need to reallocate it. */
250 dbg_hid("%s: device is already known\n", __func__
);
254 dj_hiddev
= hid_allocate_device();
255 if (IS_ERR(dj_hiddev
)) {
256 dev_err(&djrcv_hdev
->dev
, "%s: hid_allocate_device failed\n",
261 dj_hiddev
->ll_driver
= &logi_dj_ll_driver
;
262 dj_hiddev
->hid_output_raw_report
= logi_dj_output_hidraw_report
;
264 dj_hiddev
->dev
.parent
= &djrcv_hdev
->dev
;
265 dj_hiddev
->bus
= BUS_USB
;
266 dj_hiddev
->vendor
= le16_to_cpu(usbdev
->descriptor
.idVendor
);
267 dj_hiddev
->product
= le16_to_cpu(usbdev
->descriptor
.idProduct
);
268 snprintf(dj_hiddev
->name
, sizeof(dj_hiddev
->name
),
269 "Logitech Unifying Device. Wireless PID:%02x%02x",
270 dj_report
->report_params
[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB
],
271 dj_report
->report_params
[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB
]);
273 usb_make_path(usbdev
, dj_hiddev
->phys
, sizeof(dj_hiddev
->phys
));
274 snprintf(tmpstr
, sizeof(tmpstr
), ":%d", dj_report
->device_index
);
275 strlcat(dj_hiddev
->phys
, tmpstr
, sizeof(dj_hiddev
->phys
));
277 dj_dev
= kzalloc(sizeof(struct dj_device
), GFP_KERNEL
);
280 dev_err(&djrcv_hdev
->dev
, "%s: failed allocating dj_device\n",
282 goto dj_device_allocate_fail
;
285 dj_dev
->reports_supported
= get_unaligned_le32(
286 dj_report
->report_params
+ DEVICE_PAIRED_RF_REPORT_TYPE
);
287 dj_dev
->hdev
= dj_hiddev
;
288 dj_dev
->dj_receiver_dev
= djrcv_dev
;
289 dj_dev
->device_index
= dj_report
->device_index
;
290 dj_hiddev
->driver_data
= dj_dev
;
292 djrcv_dev
->paired_dj_devices
[dj_report
->device_index
] = dj_dev
;
294 if (hid_add_device(dj_hiddev
)) {
295 dev_err(&djrcv_hdev
->dev
, "%s: failed adding dj_device\n",
297 goto hid_add_device_fail
;
303 djrcv_dev
->paired_dj_devices
[dj_report
->device_index
] = NULL
;
305 dj_device_allocate_fail
:
306 hid_destroy_device(dj_hiddev
);
309 static void delayedwork_callback(struct work_struct
*work
)
311 struct dj_receiver_dev
*djrcv_dev
=
312 container_of(work
, struct dj_receiver_dev
, work
);
314 struct dj_report dj_report
;
319 dbg_hid("%s\n", __func__
);
321 spin_lock_irqsave(&djrcv_dev
->lock
, flags
);
323 count
= kfifo_out(&djrcv_dev
->notif_fifo
, &dj_report
,
324 sizeof(struct dj_report
));
326 if (count
!= sizeof(struct dj_report
)) {
327 dev_err(&djrcv_dev
->hdev
->dev
, "%s: workitem triggered without "
328 "notifications available\n", __func__
);
329 spin_unlock_irqrestore(&djrcv_dev
->lock
, flags
);
333 if (!kfifo_is_empty(&djrcv_dev
->notif_fifo
)) {
334 if (schedule_work(&djrcv_dev
->work
) == 0) {
335 dbg_hid("%s: did not schedule the work item, was "
336 "already queued\n", __func__
);
340 spin_unlock_irqrestore(&djrcv_dev
->lock
, flags
);
342 switch (dj_report
.report_type
) {
343 case REPORT_TYPE_NOTIF_DEVICE_PAIRED
:
344 logi_dj_recv_add_djhid_device(djrcv_dev
, &dj_report
);
346 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED
:
347 logi_dj_recv_destroy_djhid_device(djrcv_dev
, &dj_report
);
350 /* A normal report (i. e. not belonging to a pair/unpair notification)
351 * arriving here, means that the report arrived but we did not have a
352 * paired dj_device associated to the report's device_index, this
353 * means that the original "device paired" notification corresponding
354 * to this dj_device never arrived to this driver. The reason is that
355 * hid-core discards all packets coming from a device while probe() is
357 if (!djrcv_dev
->paired_dj_devices
[dj_report
.device_index
]) {
358 /* ok, we don't know the device, just re-ask the
359 * receiver for the list of connected devices. */
360 retval
= logi_dj_recv_query_paired_devices(djrcv_dev
);
362 /* everything went fine, so just leave */
365 dev_err(&djrcv_dev
->hdev
->dev
,
366 "%s:logi_dj_recv_query_paired_devices "
367 "error:%d\n", __func__
, retval
);
369 dbg_hid("%s: unexpected report type\n", __func__
);
373 static void logi_dj_recv_queue_notification(struct dj_receiver_dev
*djrcv_dev
,
374 struct dj_report
*dj_report
)
376 /* We are called from atomic context (tasklet && djrcv->lock held) */
378 kfifo_in(&djrcv_dev
->notif_fifo
, dj_report
, sizeof(struct dj_report
));
380 if (schedule_work(&djrcv_dev
->work
) == 0) {
381 dbg_hid("%s: did not schedule the work item, was already "
382 "queued\n", __func__
);
386 static void logi_dj_recv_forward_null_report(struct dj_receiver_dev
*djrcv_dev
,
387 struct dj_report
*dj_report
)
389 /* We are called from atomic context (tasklet && djrcv->lock held) */
391 u8 reportbuffer
[MAX_REPORT_SIZE
];
392 struct dj_device
*djdev
;
394 djdev
= djrcv_dev
->paired_dj_devices
[dj_report
->device_index
];
397 dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]"
398 " is NULL, index %d\n", dj_report
->device_index
);
399 kfifo_in(&djrcv_dev
->notif_fifo
, dj_report
, sizeof(struct dj_report
));
401 if (schedule_work(&djrcv_dev
->work
) == 0) {
402 dbg_hid("%s: did not schedule the work item, was already "
403 "queued\n", __func__
);
408 memset(reportbuffer
, 0, sizeof(reportbuffer
));
410 for (i
= 0; i
< NUMBER_OF_HID_REPORTS
; i
++) {
411 if (djdev
->reports_supported
& (1 << i
)) {
413 if (hid_input_report(djdev
->hdev
,
416 hid_reportid_size_map
[i
], 1)) {
417 dbg_hid("hid_input_report error sending null "
424 static void logi_dj_recv_forward_report(struct dj_receiver_dev
*djrcv_dev
,
425 struct dj_report
*dj_report
)
427 /* We are called from atomic context (tasklet && djrcv->lock held) */
428 struct dj_device
*dj_device
;
430 dj_device
= djrcv_dev
->paired_dj_devices
[dj_report
->device_index
];
432 if (dj_device
== NULL
) {
433 dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]"
434 " is NULL, index %d\n", dj_report
->device_index
);
435 kfifo_in(&djrcv_dev
->notif_fifo
, dj_report
, sizeof(struct dj_report
));
437 if (schedule_work(&djrcv_dev
->work
) == 0) {
438 dbg_hid("%s: did not schedule the work item, was already "
439 "queued\n", __func__
);
444 if ((dj_report
->report_type
> ARRAY_SIZE(hid_reportid_size_map
) - 1) ||
445 (hid_reportid_size_map
[dj_report
->report_type
] == 0)) {
446 dbg_hid("invalid report type:%x\n", dj_report
->report_type
);
450 if (hid_input_report(dj_device
->hdev
,
451 HID_INPUT_REPORT
, &dj_report
->report_type
,
452 hid_reportid_size_map
[dj_report
->report_type
], 1)) {
453 dbg_hid("hid_input_report error\n");
458 static int logi_dj_recv_send_report(struct dj_receiver_dev
*djrcv_dev
,
459 struct dj_report
*dj_report
)
461 struct hid_device
*hdev
= djrcv_dev
->hdev
;
464 if (!hdev
->hid_output_raw_report
) {
465 dev_err(&hdev
->dev
, "%s:"
466 "hid_output_raw_report is null\n", __func__
);
470 sent_bytes
= hdev
->hid_output_raw_report(hdev
, (u8
*) dj_report
,
471 sizeof(struct dj_report
),
474 return (sent_bytes
< 0) ? sent_bytes
: 0;
477 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev
*djrcv_dev
)
479 struct dj_report
*dj_report
;
482 /* no need to protect djrcv_dev->querying_devices */
483 if (djrcv_dev
->querying_devices
)
486 dj_report
= kzalloc(sizeof(struct dj_report
), GFP_KERNEL
);
489 dj_report
->report_id
= REPORT_ID_DJ_SHORT
;
490 dj_report
->device_index
= 0xFF;
491 dj_report
->report_type
= REPORT_TYPE_CMD_GET_PAIRED_DEVICES
;
492 retval
= logi_dj_recv_send_report(djrcv_dev
, dj_report
);
498 static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev
*djrcv_dev
,
501 struct dj_report
*dj_report
;
504 dj_report
= kzalloc(sizeof(struct dj_report
), GFP_KERNEL
);
507 dj_report
->report_id
= REPORT_ID_DJ_SHORT
;
508 dj_report
->device_index
= 0xFF;
509 dj_report
->report_type
= REPORT_TYPE_CMD_SWITCH
;
510 dj_report
->report_params
[CMD_SWITCH_PARAM_DEVBITFIELD
] = 0x3F;
511 dj_report
->report_params
[CMD_SWITCH_PARAM_TIMEOUT_SECONDS
] = (u8
)timeout
;
512 retval
= logi_dj_recv_send_report(djrcv_dev
, dj_report
);
518 static int logi_dj_ll_open(struct hid_device
*hid
)
520 dbg_hid("%s:%s\n", __func__
, hid
->phys
);
525 static void logi_dj_ll_close(struct hid_device
*hid
)
527 dbg_hid("%s:%s\n", __func__
, hid
->phys
);
530 static int logi_dj_output_hidraw_report(struct hid_device
*hid
, u8
* buf
,
532 unsigned char report_type
)
534 /* Called by hid raw to send data */
535 dbg_hid("%s\n", __func__
);
540 static void rdcat(char **rdesc
, unsigned int *rsize
, const char *data
, unsigned int size
)
542 memcpy(*rdesc
+ *rsize
, data
, size
);
546 static int logi_dj_ll_parse(struct hid_device
*hid
)
548 struct dj_device
*djdev
= hid
->driver_data
;
549 unsigned int rsize
= 0;
553 dbg_hid("%s\n", __func__
);
555 djdev
->hdev
->version
= 0x0111;
556 djdev
->hdev
->country
= 0x00;
558 rdesc
= kmalloc(MAX_RDESC_SIZE
, GFP_KERNEL
);
562 if (djdev
->reports_supported
& STD_KEYBOARD
) {
563 dbg_hid("%s: sending a kbd descriptor, reports_supported: %x\n",
564 __func__
, djdev
->reports_supported
);
565 rdcat(&rdesc
, &rsize
, kbd_descriptor
, sizeof(kbd_descriptor
));
568 if (djdev
->reports_supported
& STD_MOUSE
) {
569 dbg_hid("%s: sending a mouse descriptor, reports_supported: "
570 "%x\n", __func__
, djdev
->reports_supported
);
571 rdcat(&rdesc
, &rsize
, mse_descriptor
, sizeof(mse_descriptor
));
574 if (djdev
->reports_supported
& MULTIMEDIA
) {
575 dbg_hid("%s: sending a multimedia report descriptor: %x\n",
576 __func__
, djdev
->reports_supported
);
577 rdcat(&rdesc
, &rsize
, consumer_descriptor
, sizeof(consumer_descriptor
));
580 if (djdev
->reports_supported
& POWER_KEYS
) {
581 dbg_hid("%s: sending a power keys report descriptor: %x\n",
582 __func__
, djdev
->reports_supported
);
583 rdcat(&rdesc
, &rsize
, syscontrol_descriptor
, sizeof(syscontrol_descriptor
));
586 if (djdev
->reports_supported
& MEDIA_CENTER
) {
587 dbg_hid("%s: sending a media center report descriptor: %x\n",
588 __func__
, djdev
->reports_supported
);
589 rdcat(&rdesc
, &rsize
, media_descriptor
, sizeof(media_descriptor
));
592 if (djdev
->reports_supported
& KBD_LEDS
) {
593 dbg_hid("%s: need to send kbd leds report descriptor: %x\n",
594 __func__
, djdev
->reports_supported
);
597 retval
= hid_parse_report(hid
, rdesc
, rsize
);
603 static int logi_dj_ll_input_event(struct input_dev
*dev
, unsigned int type
,
604 unsigned int code
, int value
)
606 /* Sent by the input layer to handle leds and Force Feedback */
607 struct hid_device
*dj_hiddev
= input_get_drvdata(dev
);
608 struct dj_device
*dj_dev
= dj_hiddev
->driver_data
;
610 struct dj_receiver_dev
*djrcv_dev
=
611 dev_get_drvdata(dj_hiddev
->dev
.parent
);
612 struct hid_device
*dj_rcv_hiddev
= djrcv_dev
->hdev
;
613 struct hid_report_enum
*output_report_enum
;
615 struct hid_field
*field
;
616 struct hid_report
*report
;
617 unsigned char data
[8];
620 dbg_hid("%s: %s, type:%d | code:%d | value:%d\n",
621 __func__
, dev
->phys
, type
, code
, value
);
626 offset
= hidinput_find_field(dj_hiddev
, type
, code
, &field
);
629 dev_warn(&dev
->dev
, "event field not found\n");
632 hid_set_field(field
, offset
, value
);
633 hid_output_report(field
->report
, &data
[0]);
635 output_report_enum
= &dj_rcv_hiddev
->report_enum
[HID_OUTPUT_REPORT
];
636 report
= output_report_enum
->report_id_hash
[REPORT_ID_DJ_SHORT
];
637 hid_set_field(report
->field
[0], 0, dj_dev
->device_index
);
638 hid_set_field(report
->field
[0], 1, REPORT_TYPE_LEDS
);
639 hid_set_field(report
->field
[0], 2, data
[1]);
641 usbhid_submit_report(dj_rcv_hiddev
, report
, USB_DIR_OUT
);
647 static int logi_dj_ll_start(struct hid_device
*hid
)
649 dbg_hid("%s\n", __func__
);
653 static void logi_dj_ll_stop(struct hid_device
*hid
)
655 dbg_hid("%s\n", __func__
);
659 static struct hid_ll_driver logi_dj_ll_driver
= {
660 .parse
= logi_dj_ll_parse
,
661 .start
= logi_dj_ll_start
,
662 .stop
= logi_dj_ll_stop
,
663 .open
= logi_dj_ll_open
,
664 .close
= logi_dj_ll_close
,
665 .hidinput_input_event
= logi_dj_ll_input_event
,
669 static int logi_dj_raw_event(struct hid_device
*hdev
,
670 struct hid_report
*report
, u8
*data
,
673 struct dj_receiver_dev
*djrcv_dev
= hid_get_drvdata(hdev
);
674 struct dj_report
*dj_report
= (struct dj_report
*) data
;
676 bool report_processed
= false;
678 dbg_hid("%s, size:%d\n", __func__
, size
);
680 /* Here we receive all data coming from iface 2, there are 4 cases:
682 * 1) Data should continue its normal processing i.e. data does not
683 * come from the DJ collection, in which case we do nothing and
684 * return 0, so hid-core can continue normal processing (will forward
685 * to associated hidraw device)
687 * 2) Data is from DJ collection, and is intended for this driver i. e.
688 * data contains arrival, departure, etc notifications, in which case
689 * we queue them for delayed processing by the work queue. We return 1
690 * to hid-core as no further processing is required from it.
692 * 3) Data is from DJ collection, and informs a connection change,
693 * if the change means rf link loss, then we must send a null report
694 * to the upper layer to discard potentially pressed keys that may be
695 * repeated forever by the input layer. Return 1 to hid-core as no
696 * further processing is required.
698 * 4) Data is from DJ collection and is an actual input event from
699 * a paired DJ device in which case we forward it to the correct hid
700 * device (via hid_input_report() ) and return 1 so hid-core does not do
701 * anything else with it.
704 spin_lock_irqsave(&djrcv_dev
->lock
, flags
);
705 if (dj_report
->report_id
== REPORT_ID_DJ_SHORT
) {
706 switch (dj_report
->report_type
) {
707 case REPORT_TYPE_NOTIF_DEVICE_PAIRED
:
708 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED
:
709 logi_dj_recv_queue_notification(djrcv_dev
, dj_report
);
711 case REPORT_TYPE_NOTIF_CONNECTION_STATUS
:
712 if (dj_report
->report_params
[CONNECTION_STATUS_PARAM_STATUS
] ==
714 logi_dj_recv_forward_null_report(djrcv_dev
, dj_report
);
718 logi_dj_recv_forward_report(djrcv_dev
, dj_report
);
720 report_processed
= true;
722 spin_unlock_irqrestore(&djrcv_dev
->lock
, flags
);
724 return report_processed
;
727 static int logi_dj_probe(struct hid_device
*hdev
,
728 const struct hid_device_id
*id
)
730 struct usb_interface
*intf
= to_usb_interface(hdev
->dev
.parent
);
731 struct dj_receiver_dev
*djrcv_dev
;
734 if (is_dj_device((struct dj_device
*)hdev
->driver_data
))
737 dbg_hid("%s called for ifnum %d\n", __func__
,
738 intf
->cur_altsetting
->desc
.bInterfaceNumber
);
740 /* Ignore interfaces 0 and 1, they will not carry any data, dont create
741 * any hid_device for them */
742 if (intf
->cur_altsetting
->desc
.bInterfaceNumber
!=
743 LOGITECH_DJ_INTERFACE_NUMBER
) {
744 dbg_hid("%s: ignoring ifnum %d\n", __func__
,
745 intf
->cur_altsetting
->desc
.bInterfaceNumber
);
749 /* Treat interface 2 */
751 djrcv_dev
= kzalloc(sizeof(struct dj_receiver_dev
), GFP_KERNEL
);
754 "%s:failed allocating dj_receiver_dev\n", __func__
);
757 djrcv_dev
->hdev
= hdev
;
758 INIT_WORK(&djrcv_dev
->work
, delayedwork_callback
);
759 spin_lock_init(&djrcv_dev
->lock
);
760 if (kfifo_alloc(&djrcv_dev
->notif_fifo
,
761 DJ_MAX_NUMBER_NOTIFICATIONS
* sizeof(struct dj_report
),
764 "%s:failed allocating notif_fifo\n", __func__
);
768 hid_set_drvdata(hdev
, djrcv_dev
);
770 /* Call to usbhid to fetch the HID descriptors of interface 2 and
771 * subsequently call to the hid/hid-core to parse the fetched
772 * descriptors, this will in turn create the hidraw and hiddev nodes
773 * for interface 2 of the receiver */
774 retval
= hid_parse(hdev
);
777 "%s:parse of interface 2 failed\n", __func__
);
781 /* Starts the usb device and connects to upper interfaces hiddev and
783 retval
= hid_hw_start(hdev
, HID_CONNECT_DEFAULT
);
786 "%s:hid_hw_start returned error\n", __func__
);
787 goto hid_hw_start_fail
;
790 retval
= logi_dj_recv_switch_to_dj_mode(djrcv_dev
, 0);
793 "%s:logi_dj_recv_switch_to_dj_mode returned error:%d\n",
795 goto switch_to_dj_mode_fail
;
798 /* This is enabling the polling urb on the IN endpoint */
799 retval
= hdev
->ll_driver
->open(hdev
);
801 dev_err(&hdev
->dev
, "%s:hdev->ll_driver->open returned "
802 "error:%d\n", __func__
, retval
);
806 retval
= logi_dj_recv_query_paired_devices(djrcv_dev
);
808 dev_err(&hdev
->dev
, "%s:logi_dj_recv_query_paired_devices "
809 "error:%d\n", __func__
, retval
);
810 goto logi_dj_recv_query_paired_devices_failed
;
815 logi_dj_recv_query_paired_devices_failed
:
816 hdev
->ll_driver
->close(hdev
);
819 switch_to_dj_mode_fail
:
824 kfifo_free(&djrcv_dev
->notif_fifo
);
826 hid_set_drvdata(hdev
, NULL
);
832 static int logi_dj_reset_resume(struct hid_device
*hdev
)
835 struct dj_receiver_dev
*djrcv_dev
= hid_get_drvdata(hdev
);
837 retval
= logi_dj_recv_switch_to_dj_mode(djrcv_dev
, 0);
840 "%s:logi_dj_recv_switch_to_dj_mode returned error:%d\n",
848 static void logi_dj_remove(struct hid_device
*hdev
)
850 struct dj_receiver_dev
*djrcv_dev
= hid_get_drvdata(hdev
);
851 struct dj_device
*dj_dev
;
854 dbg_hid("%s\n", __func__
);
856 cancel_work_sync(&djrcv_dev
->work
);
858 hdev
->ll_driver
->close(hdev
);
861 /* I suppose that at this point the only context that can access
862 * the djrecv_data is this thread as the work item is guaranteed to
863 * have finished and no more raw_event callbacks should arrive after
864 * the remove callback was triggered so no locks are put around the
866 for (i
= 0; i
< (DJ_MAX_PAIRED_DEVICES
+ DJ_DEVICE_INDEX_MIN
); i
++) {
867 dj_dev
= djrcv_dev
->paired_dj_devices
[i
];
868 if (dj_dev
!= NULL
) {
869 hid_destroy_device(dj_dev
->hdev
);
871 djrcv_dev
->paired_dj_devices
[i
] = NULL
;
875 kfifo_free(&djrcv_dev
->notif_fifo
);
877 hid_set_drvdata(hdev
, NULL
);
880 static int logi_djdevice_probe(struct hid_device
*hdev
,
881 const struct hid_device_id
*id
)
884 struct dj_device
*dj_dev
= hdev
->driver_data
;
886 if (!is_dj_device(dj_dev
))
889 ret
= hid_parse(hdev
);
891 ret
= hid_hw_start(hdev
, HID_CONNECT_DEFAULT
);
896 static const struct hid_device_id logi_dj_receivers
[] = {
897 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH
,
898 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER
)},
899 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH
,
900 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2
)},
904 MODULE_DEVICE_TABLE(hid
, logi_dj_receivers
);
906 static struct hid_driver logi_djreceiver_driver
= {
907 .name
= "logitech-djreceiver",
908 .id_table
= logi_dj_receivers
,
909 .probe
= logi_dj_probe
,
910 .remove
= logi_dj_remove
,
911 .raw_event
= logi_dj_raw_event
,
913 .reset_resume
= logi_dj_reset_resume
,
918 static const struct hid_device_id logi_dj_devices
[] = {
919 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH
,
920 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER
)},
921 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH
,
922 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2
)},
926 static struct hid_driver logi_djdevice_driver
= {
927 .name
= "logitech-djdevice",
928 .id_table
= logi_dj_devices
,
929 .probe
= logi_djdevice_probe
,
933 static int __init
logi_dj_init(void)
937 dbg_hid("Logitech-DJ:%s\n", __func__
);
939 retval
= hid_register_driver(&logi_djreceiver_driver
);
943 retval
= hid_register_driver(&logi_djdevice_driver
);
945 hid_unregister_driver(&logi_djreceiver_driver
);
951 static void __exit
logi_dj_exit(void)
953 dbg_hid("Logitech-DJ:%s\n", __func__
);
955 hid_unregister_driver(&logi_djdevice_driver
);
956 hid_unregister_driver(&logi_djreceiver_driver
);
960 module_init(logi_dj_init
);
961 module_exit(logi_dj_exit
);
962 MODULE_LICENSE("GPL");
963 MODULE_AUTHOR("Logitech");
964 MODULE_AUTHOR("Nestor Lopez Casado");
965 MODULE_AUTHOR("nlopezcasad@logitech.com");