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
);
197 static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev
*djrcv_dev
,
198 struct dj_report
*dj_report
)
200 /* Called in delayed work context */
201 struct dj_device
*dj_dev
;
204 spin_lock_irqsave(&djrcv_dev
->lock
, flags
);
205 dj_dev
= djrcv_dev
->paired_dj_devices
[dj_report
->device_index
];
206 djrcv_dev
->paired_dj_devices
[dj_report
->device_index
] = NULL
;
207 spin_unlock_irqrestore(&djrcv_dev
->lock
, flags
);
209 if (dj_dev
!= NULL
) {
210 hid_destroy_device(dj_dev
->hdev
);
213 dev_err(&djrcv_dev
->hdev
->dev
, "%s: can't destroy a NULL device\n",
218 static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev
*djrcv_dev
,
219 struct dj_report
*dj_report
)
221 /* Called in delayed work context */
222 struct hid_device
*djrcv_hdev
= djrcv_dev
->hdev
;
223 struct usb_interface
*intf
= to_usb_interface(djrcv_hdev
->dev
.parent
);
224 struct usb_device
*usbdev
= interface_to_usbdev(intf
);
225 struct hid_device
*dj_hiddev
;
226 struct dj_device
*dj_dev
;
228 /* Device index goes from 1 to 6, we need 3 bytes to store the
229 * semicolon, the index, and a null terminator
231 unsigned char tmpstr
[3];
233 if (dj_report
->report_params
[DEVICE_PAIRED_PARAM_SPFUNCTION
] &
234 SPFUNCTION_DEVICE_LIST_EMPTY
) {
235 dbg_hid("%s: device list is empty\n", __func__
);
239 if ((dj_report
->device_index
< DJ_DEVICE_INDEX_MIN
) ||
240 (dj_report
->device_index
> DJ_DEVICE_INDEX_MAX
)) {
241 dev_err(&djrcv_hdev
->dev
, "%s: invalid device index:%d\n",
242 __func__
, dj_report
->device_index
);
246 dj_hiddev
= hid_allocate_device();
247 if (IS_ERR(dj_hiddev
)) {
248 dev_err(&djrcv_hdev
->dev
, "%s: hid_allocate_device failed\n",
253 dj_hiddev
->ll_driver
= &logi_dj_ll_driver
;
254 dj_hiddev
->hid_output_raw_report
= logi_dj_output_hidraw_report
;
256 dj_hiddev
->dev
.parent
= &djrcv_hdev
->dev
;
257 dj_hiddev
->bus
= BUS_USB
;
258 dj_hiddev
->vendor
= le16_to_cpu(usbdev
->descriptor
.idVendor
);
259 dj_hiddev
->product
= le16_to_cpu(usbdev
->descriptor
.idProduct
);
260 snprintf(dj_hiddev
->name
, sizeof(dj_hiddev
->name
),
261 "Logitech Unifying Device. Wireless PID:%02x%02x",
262 dj_report
->report_params
[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB
],
263 dj_report
->report_params
[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB
]);
265 usb_make_path(usbdev
, dj_hiddev
->phys
, sizeof(dj_hiddev
->phys
));
266 snprintf(tmpstr
, sizeof(tmpstr
), ":%d", dj_report
->device_index
);
267 strlcat(dj_hiddev
->phys
, tmpstr
, sizeof(dj_hiddev
->phys
));
269 dj_dev
= kzalloc(sizeof(struct dj_device
), GFP_KERNEL
);
272 dev_err(&djrcv_hdev
->dev
, "%s: failed allocating dj_device\n",
274 goto dj_device_allocate_fail
;
277 dj_dev
->reports_supported
= get_unaligned_le32(
278 dj_report
->report_params
+ DEVICE_PAIRED_RF_REPORT_TYPE
);
279 dj_dev
->hdev
= dj_hiddev
;
280 dj_dev
->dj_receiver_dev
= djrcv_dev
;
281 dj_dev
->device_index
= dj_report
->device_index
;
282 dj_hiddev
->driver_data
= dj_dev
;
284 djrcv_dev
->paired_dj_devices
[dj_report
->device_index
] = dj_dev
;
286 if (hid_add_device(dj_hiddev
)) {
287 dev_err(&djrcv_hdev
->dev
, "%s: failed adding dj_device\n",
289 goto hid_add_device_fail
;
295 djrcv_dev
->paired_dj_devices
[dj_report
->device_index
] = NULL
;
297 dj_device_allocate_fail
:
298 hid_destroy_device(dj_hiddev
);
301 static void delayedwork_callback(struct work_struct
*work
)
303 struct dj_receiver_dev
*djrcv_dev
=
304 container_of(work
, struct dj_receiver_dev
, work
);
306 struct dj_report dj_report
;
310 dbg_hid("%s\n", __func__
);
312 spin_lock_irqsave(&djrcv_dev
->lock
, flags
);
314 count
= kfifo_out(&djrcv_dev
->notif_fifo
, &dj_report
,
315 sizeof(struct dj_report
));
317 if (count
!= sizeof(struct dj_report
)) {
318 dev_err(&djrcv_dev
->hdev
->dev
, "%s: workitem triggered without "
319 "notifications available\n", __func__
);
320 spin_unlock_irqrestore(&djrcv_dev
->lock
, flags
);
324 if (!kfifo_is_empty(&djrcv_dev
->notif_fifo
)) {
325 if (schedule_work(&djrcv_dev
->work
) == 0) {
326 dbg_hid("%s: did not schedule the work item, was "
327 "already queued\n", __func__
);
331 spin_unlock_irqrestore(&djrcv_dev
->lock
, flags
);
333 switch (dj_report
.report_type
) {
334 case REPORT_TYPE_NOTIF_DEVICE_PAIRED
:
335 logi_dj_recv_add_djhid_device(djrcv_dev
, &dj_report
);
337 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED
:
338 logi_dj_recv_destroy_djhid_device(djrcv_dev
, &dj_report
);
341 dbg_hid("%s: unexpected report type\n", __func__
);
345 static void logi_dj_recv_queue_notification(struct dj_receiver_dev
*djrcv_dev
,
346 struct dj_report
*dj_report
)
348 /* We are called from atomic context (tasklet && djrcv->lock held) */
350 kfifo_in(&djrcv_dev
->notif_fifo
, dj_report
, sizeof(struct dj_report
));
352 if (schedule_work(&djrcv_dev
->work
) == 0) {
353 dbg_hid("%s: did not schedule the work item, was already "
354 "queued\n", __func__
);
358 static void logi_dj_recv_forward_null_report(struct dj_receiver_dev
*djrcv_dev
,
359 struct dj_report
*dj_report
)
361 /* We are called from atomic context (tasklet && djrcv->lock held) */
363 u8 reportbuffer
[MAX_REPORT_SIZE
];
364 struct dj_device
*djdev
;
366 djdev
= djrcv_dev
->paired_dj_devices
[dj_report
->device_index
];
369 dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]"
370 " is NULL, index %d\n", dj_report
->device_index
);
374 memset(reportbuffer
, 0, sizeof(reportbuffer
));
376 for (i
= 0; i
< NUMBER_OF_HID_REPORTS
; i
++) {
377 if (djdev
->reports_supported
& (1 << i
)) {
379 if (hid_input_report(djdev
->hdev
,
382 hid_reportid_size_map
[i
], 1)) {
383 dbg_hid("hid_input_report error sending null "
390 static void logi_dj_recv_forward_report(struct dj_receiver_dev
*djrcv_dev
,
391 struct dj_report
*dj_report
)
393 /* We are called from atomic context (tasklet && djrcv->lock held) */
394 struct dj_device
*dj_device
;
396 dj_device
= djrcv_dev
->paired_dj_devices
[dj_report
->device_index
];
398 if (dj_device
== NULL
) {
399 dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]"
400 " is NULL, index %d\n", dj_report
->device_index
);
404 if ((dj_report
->report_type
> ARRAY_SIZE(hid_reportid_size_map
) - 1) ||
405 (hid_reportid_size_map
[dj_report
->report_type
] == 0)) {
406 dbg_hid("invalid report type:%x\n", dj_report
->report_type
);
410 if (hid_input_report(dj_device
->hdev
,
411 HID_INPUT_REPORT
, &dj_report
->report_type
,
412 hid_reportid_size_map
[dj_report
->report_type
], 1)) {
413 dbg_hid("hid_input_report error\n");
418 static int logi_dj_recv_send_report(struct dj_receiver_dev
*djrcv_dev
,
419 struct dj_report
*dj_report
)
421 struct hid_device
*hdev
= djrcv_dev
->hdev
;
424 if (!hdev
->hid_output_raw_report
) {
425 dev_err(&hdev
->dev
, "%s:"
426 "hid_output_raw_report is null\n", __func__
);
430 sent_bytes
= hdev
->hid_output_raw_report(hdev
, (u8
*) dj_report
,
431 sizeof(struct dj_report
),
434 return (sent_bytes
< 0) ? sent_bytes
: 0;
437 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev
*djrcv_dev
)
439 struct dj_report
*dj_report
;
442 dj_report
= kzalloc(sizeof(struct dj_report
), GFP_KERNEL
);
445 dj_report
->report_id
= REPORT_ID_DJ_SHORT
;
446 dj_report
->device_index
= 0xFF;
447 dj_report
->report_type
= REPORT_TYPE_CMD_GET_PAIRED_DEVICES
;
448 retval
= logi_dj_recv_send_report(djrcv_dev
, dj_report
);
453 static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev
*djrcv_dev
,
456 struct dj_report
*dj_report
;
459 dj_report
= kzalloc(sizeof(struct dj_report
), GFP_KERNEL
);
462 dj_report
->report_id
= REPORT_ID_DJ_SHORT
;
463 dj_report
->device_index
= 0xFF;
464 dj_report
->report_type
= REPORT_TYPE_CMD_SWITCH
;
465 dj_report
->report_params
[CMD_SWITCH_PARAM_DEVBITFIELD
] = 0x3F;
466 dj_report
->report_params
[CMD_SWITCH_PARAM_TIMEOUT_SECONDS
] = (u8
)timeout
;
467 retval
= logi_dj_recv_send_report(djrcv_dev
, dj_report
);
473 static int logi_dj_ll_open(struct hid_device
*hid
)
475 dbg_hid("%s:%s\n", __func__
, hid
->phys
);
480 static void logi_dj_ll_close(struct hid_device
*hid
)
482 dbg_hid("%s:%s\n", __func__
, hid
->phys
);
485 static int logi_dj_output_hidraw_report(struct hid_device
*hid
, u8
* buf
,
487 unsigned char report_type
)
489 /* Called by hid raw to send data */
490 dbg_hid("%s\n", __func__
);
495 static void rdcat(char **rdesc
, unsigned int *rsize
, const char *data
, unsigned int size
)
497 memcpy(*rdesc
+ *rsize
, data
, size
);
501 static int logi_dj_ll_parse(struct hid_device
*hid
)
503 struct dj_device
*djdev
= hid
->driver_data
;
504 unsigned int rsize
= 0;
508 dbg_hid("%s\n", __func__
);
510 djdev
->hdev
->version
= 0x0111;
511 djdev
->hdev
->country
= 0x00;
513 rdesc
= kmalloc(MAX_RDESC_SIZE
, GFP_KERNEL
);
517 if (djdev
->reports_supported
& STD_KEYBOARD
) {
518 dbg_hid("%s: sending a kbd descriptor, reports_supported: %x\n",
519 __func__
, djdev
->reports_supported
);
520 rdcat(&rdesc
, &rsize
, kbd_descriptor
, sizeof(kbd_descriptor
));
523 if (djdev
->reports_supported
& STD_MOUSE
) {
524 dbg_hid("%s: sending a mouse descriptor, reports_supported: "
525 "%x\n", __func__
, djdev
->reports_supported
);
526 rdcat(&rdesc
, &rsize
, mse_descriptor
, sizeof(mse_descriptor
));
529 if (djdev
->reports_supported
& MULTIMEDIA
) {
530 dbg_hid("%s: sending a multimedia report descriptor: %x\n",
531 __func__
, djdev
->reports_supported
);
532 rdcat(&rdesc
, &rsize
, consumer_descriptor
, sizeof(consumer_descriptor
));
535 if (djdev
->reports_supported
& POWER_KEYS
) {
536 dbg_hid("%s: sending a power keys report descriptor: %x\n",
537 __func__
, djdev
->reports_supported
);
538 rdcat(&rdesc
, &rsize
, syscontrol_descriptor
, sizeof(syscontrol_descriptor
));
541 if (djdev
->reports_supported
& MEDIA_CENTER
) {
542 dbg_hid("%s: sending a media center report descriptor: %x\n",
543 __func__
, djdev
->reports_supported
);
544 rdcat(&rdesc
, &rsize
, media_descriptor
, sizeof(media_descriptor
));
547 if (djdev
->reports_supported
& KBD_LEDS
) {
548 dbg_hid("%s: need to send kbd leds report descriptor: %x\n",
549 __func__
, djdev
->reports_supported
);
552 retval
= hid_parse_report(hid
, rdesc
, rsize
);
558 static int logi_dj_ll_input_event(struct input_dev
*dev
, unsigned int type
,
559 unsigned int code
, int value
)
561 /* Sent by the input layer to handle leds and Force Feedback */
562 struct hid_device
*dj_hiddev
= input_get_drvdata(dev
);
563 struct dj_device
*dj_dev
= dj_hiddev
->driver_data
;
565 struct dj_receiver_dev
*djrcv_dev
=
566 dev_get_drvdata(dj_hiddev
->dev
.parent
);
567 struct hid_device
*dj_rcv_hiddev
= djrcv_dev
->hdev
;
568 struct hid_report_enum
*output_report_enum
;
570 struct hid_field
*field
;
571 struct hid_report
*report
;
572 unsigned char data
[8];
575 dbg_hid("%s: %s, type:%d | code:%d | value:%d\n",
576 __func__
, dev
->phys
, type
, code
, value
);
581 offset
= hidinput_find_field(dj_hiddev
, type
, code
, &field
);
584 dev_warn(&dev
->dev
, "event field not found\n");
587 hid_set_field(field
, offset
, value
);
588 hid_output_report(field
->report
, &data
[0]);
590 output_report_enum
= &dj_rcv_hiddev
->report_enum
[HID_OUTPUT_REPORT
];
591 report
= output_report_enum
->report_id_hash
[REPORT_ID_DJ_SHORT
];
592 hid_set_field(report
->field
[0], 0, dj_dev
->device_index
);
593 hid_set_field(report
->field
[0], 1, REPORT_TYPE_LEDS
);
594 hid_set_field(report
->field
[0], 2, data
[1]);
596 usbhid_submit_report(dj_rcv_hiddev
, report
, USB_DIR_OUT
);
602 static int logi_dj_ll_start(struct hid_device
*hid
)
604 dbg_hid("%s\n", __func__
);
608 static void logi_dj_ll_stop(struct hid_device
*hid
)
610 dbg_hid("%s\n", __func__
);
614 static struct hid_ll_driver logi_dj_ll_driver
= {
615 .parse
= logi_dj_ll_parse
,
616 .start
= logi_dj_ll_start
,
617 .stop
= logi_dj_ll_stop
,
618 .open
= logi_dj_ll_open
,
619 .close
= logi_dj_ll_close
,
620 .hidinput_input_event
= logi_dj_ll_input_event
,
624 static int logi_dj_raw_event(struct hid_device
*hdev
,
625 struct hid_report
*report
, u8
*data
,
628 struct dj_receiver_dev
*djrcv_dev
= hid_get_drvdata(hdev
);
629 struct dj_report
*dj_report
= (struct dj_report
*) data
;
631 bool report_processed
= false;
633 dbg_hid("%s, size:%d\n", __func__
, size
);
635 /* Here we receive all data coming from iface 2, there are 4 cases:
637 * 1) Data should continue its normal processing i.e. data does not
638 * come from the DJ collection, in which case we do nothing and
639 * return 0, so hid-core can continue normal processing (will forward
640 * to associated hidraw device)
642 * 2) Data is from DJ collection, and is intended for this driver i. e.
643 * data contains arrival, departure, etc notifications, in which case
644 * we queue them for delayed processing by the work queue. We return 1
645 * to hid-core as no further processing is required from it.
647 * 3) Data is from DJ collection, and informs a connection change,
648 * if the change means rf link loss, then we must send a null report
649 * to the upper layer to discard potentially pressed keys that may be
650 * repeated forever by the input layer. Return 1 to hid-core as no
651 * further processing is required.
653 * 4) Data is from DJ collection and is an actual input event from
654 * a paired DJ device in which case we forward it to the correct hid
655 * device (via hid_input_report() ) and return 1 so hid-core does not do
656 * anything else with it.
659 spin_lock_irqsave(&djrcv_dev
->lock
, flags
);
660 if (dj_report
->report_id
== REPORT_ID_DJ_SHORT
) {
661 switch (dj_report
->report_type
) {
662 case REPORT_TYPE_NOTIF_DEVICE_PAIRED
:
663 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED
:
664 logi_dj_recv_queue_notification(djrcv_dev
, dj_report
);
666 case REPORT_TYPE_NOTIF_CONNECTION_STATUS
:
667 if (dj_report
->report_params
[CONNECTION_STATUS_PARAM_STATUS
] ==
669 logi_dj_recv_forward_null_report(djrcv_dev
, dj_report
);
673 logi_dj_recv_forward_report(djrcv_dev
, dj_report
);
675 report_processed
= true;
677 spin_unlock_irqrestore(&djrcv_dev
->lock
, flags
);
679 return report_processed
;
682 static int logi_dj_probe(struct hid_device
*hdev
,
683 const struct hid_device_id
*id
)
685 struct usb_interface
*intf
= to_usb_interface(hdev
->dev
.parent
);
686 struct dj_receiver_dev
*djrcv_dev
;
689 if (is_dj_device((struct dj_device
*)hdev
->driver_data
))
692 dbg_hid("%s called for ifnum %d\n", __func__
,
693 intf
->cur_altsetting
->desc
.bInterfaceNumber
);
695 /* Ignore interfaces 0 and 1, they will not carry any data, dont create
696 * any hid_device for them */
697 if (intf
->cur_altsetting
->desc
.bInterfaceNumber
!=
698 LOGITECH_DJ_INTERFACE_NUMBER
) {
699 dbg_hid("%s: ignoring ifnum %d\n", __func__
,
700 intf
->cur_altsetting
->desc
.bInterfaceNumber
);
704 /* Treat interface 2 */
706 djrcv_dev
= kzalloc(sizeof(struct dj_receiver_dev
), GFP_KERNEL
);
709 "%s:failed allocating dj_receiver_dev\n", __func__
);
712 djrcv_dev
->hdev
= hdev
;
713 INIT_WORK(&djrcv_dev
->work
, delayedwork_callback
);
714 spin_lock_init(&djrcv_dev
->lock
);
715 if (kfifo_alloc(&djrcv_dev
->notif_fifo
,
716 DJ_MAX_NUMBER_NOTIFICATIONS
* sizeof(struct dj_report
),
719 "%s:failed allocating notif_fifo\n", __func__
);
723 hid_set_drvdata(hdev
, djrcv_dev
);
725 /* Call to usbhid to fetch the HID descriptors of interface 2 and
726 * subsequently call to the hid/hid-core to parse the fetched
727 * descriptors, this will in turn create the hidraw and hiddev nodes
728 * for interface 2 of the receiver */
729 retval
= hid_parse(hdev
);
732 "%s:parse of interface 2 failed\n", __func__
);
736 /* Starts the usb device and connects to upper interfaces hiddev and
738 retval
= hid_hw_start(hdev
, HID_CONNECT_DEFAULT
);
741 "%s:hid_hw_start returned error\n", __func__
);
742 goto hid_hw_start_fail
;
745 retval
= logi_dj_recv_switch_to_dj_mode(djrcv_dev
, 0);
748 "%s:logi_dj_recv_switch_to_dj_mode returned error:%d\n",
750 goto switch_to_dj_mode_fail
;
753 /* This is enabling the polling urb on the IN endpoint */
754 retval
= hdev
->ll_driver
->open(hdev
);
756 dev_err(&hdev
->dev
, "%s:hdev->ll_driver->open returned "
757 "error:%d\n", __func__
, retval
);
761 retval
= logi_dj_recv_query_paired_devices(djrcv_dev
);
763 dev_err(&hdev
->dev
, "%s:logi_dj_recv_query_paired_devices "
764 "error:%d\n", __func__
, retval
);
765 goto logi_dj_recv_query_paired_devices_failed
;
770 logi_dj_recv_query_paired_devices_failed
:
771 hdev
->ll_driver
->close(hdev
);
774 switch_to_dj_mode_fail
:
779 kfifo_free(&djrcv_dev
->notif_fifo
);
781 hid_set_drvdata(hdev
, NULL
);
787 static int logi_dj_reset_resume(struct hid_device
*hdev
)
790 struct dj_receiver_dev
*djrcv_dev
= hid_get_drvdata(hdev
);
792 retval
= logi_dj_recv_switch_to_dj_mode(djrcv_dev
, 0);
795 "%s:logi_dj_recv_switch_to_dj_mode returned error:%d\n",
803 static void logi_dj_remove(struct hid_device
*hdev
)
805 struct dj_receiver_dev
*djrcv_dev
= hid_get_drvdata(hdev
);
806 struct dj_device
*dj_dev
;
809 dbg_hid("%s\n", __func__
);
811 cancel_work_sync(&djrcv_dev
->work
);
813 hdev
->ll_driver
->close(hdev
);
816 /* I suppose that at this point the only context that can access
817 * the djrecv_data is this thread as the work item is guaranteed to
818 * have finished and no more raw_event callbacks should arrive after
819 * the remove callback was triggered so no locks are put around the
821 for (i
= 0; i
< (DJ_MAX_PAIRED_DEVICES
+ DJ_DEVICE_INDEX_MIN
); i
++) {
822 dj_dev
= djrcv_dev
->paired_dj_devices
[i
];
823 if (dj_dev
!= NULL
) {
824 hid_destroy_device(dj_dev
->hdev
);
826 djrcv_dev
->paired_dj_devices
[i
] = NULL
;
830 kfifo_free(&djrcv_dev
->notif_fifo
);
832 hid_set_drvdata(hdev
, NULL
);
835 static int logi_djdevice_probe(struct hid_device
*hdev
,
836 const struct hid_device_id
*id
)
839 struct dj_device
*dj_dev
= hdev
->driver_data
;
841 if (!is_dj_device(dj_dev
))
844 ret
= hid_parse(hdev
);
846 ret
= hid_hw_start(hdev
, HID_CONNECT_DEFAULT
);
851 static const struct hid_device_id logi_dj_receivers
[] = {
852 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH
,
853 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER
)},
854 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH
,
855 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2
)},
859 MODULE_DEVICE_TABLE(hid
, logi_dj_receivers
);
861 static struct hid_driver logi_djreceiver_driver
= {
862 .name
= "logitech-djreceiver",
863 .id_table
= logi_dj_receivers
,
864 .probe
= logi_dj_probe
,
865 .remove
= logi_dj_remove
,
866 .raw_event
= logi_dj_raw_event
,
868 .reset_resume
= logi_dj_reset_resume
,
873 static const struct hid_device_id logi_dj_devices
[] = {
874 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH
,
875 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER
)},
876 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH
,
877 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2
)},
881 static struct hid_driver logi_djdevice_driver
= {
882 .name
= "logitech-djdevice",
883 .id_table
= logi_dj_devices
,
884 .probe
= logi_djdevice_probe
,
888 static int __init
logi_dj_init(void)
892 dbg_hid("Logitech-DJ:%s\n", __func__
);
894 retval
= hid_register_driver(&logi_djreceiver_driver
);
898 retval
= hid_register_driver(&logi_djdevice_driver
);
900 hid_unregister_driver(&logi_djreceiver_driver
);
906 static void __exit
logi_dj_exit(void)
908 dbg_hid("Logitech-DJ:%s\n", __func__
);
910 hid_unregister_driver(&logi_djdevice_driver
);
911 hid_unregister_driver(&logi_djreceiver_driver
);
915 module_init(logi_dj_init
);
916 module_exit(logi_dj_exit
);
917 MODULE_LICENSE("GPL");
918 MODULE_AUTHOR("Logitech");
919 MODULE_AUTHOR("Nestor Lopez Casado");
920 MODULE_AUTHOR("nlopezcasad@logitech.com");