Commit | Line | Data |
---|---|---|
2025cf9e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b95f5bcb S |
2 | /* |
3 | * Copyright (c) 2009, Citrix Systems, Inc. | |
4 | * Copyright (c) 2010, Microsoft Corporation. | |
5 | * Copyright (c) 2011, Novell Inc. | |
b95f5bcb S |
6 | */ |
7 | #include <linux/init.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/device.h> | |
10 | #include <linux/completion.h> | |
11 | #include <linux/input.h> | |
12 | #include <linux/hid.h> | |
13 | #include <linux/hiddev.h> | |
14 | #include <linux/hyperv.h> | |
15 | ||
16 | ||
17 | struct hv_input_dev_info { | |
18 | unsigned int size; | |
19 | unsigned short vendor; | |
20 | unsigned short product; | |
21 | unsigned short version; | |
22 | unsigned short reserved[11]; | |
23 | }; | |
24 | ||
b95f5bcb S |
25 | /* |
26 | * Current version | |
27 | * | |
28 | * History: | |
29 | * Beta, RC < 2008/1/22 1,0 | |
30 | * RC > 2008/1/22 2,0 | |
31 | */ | |
32 | #define SYNTHHID_INPUT_VERSION_MAJOR 2 | |
33 | #define SYNTHHID_INPUT_VERSION_MINOR 0 | |
34 | #define SYNTHHID_INPUT_VERSION (SYNTHHID_INPUT_VERSION_MINOR | \ | |
35 | (SYNTHHID_INPUT_VERSION_MAJOR << 16)) | |
36 | ||
37 | ||
38 | #pragma pack(push, 1) | |
39 | /* | |
40 | * Message types in the synthetic input protocol | |
41 | */ | |
42 | enum synthhid_msg_type { | |
43 | SYNTH_HID_PROTOCOL_REQUEST, | |
44 | SYNTH_HID_PROTOCOL_RESPONSE, | |
45 | SYNTH_HID_INITIAL_DEVICE_INFO, | |
46 | SYNTH_HID_INITIAL_DEVICE_INFO_ACK, | |
47 | SYNTH_HID_INPUT_REPORT, | |
48 | SYNTH_HID_MAX | |
49 | }; | |
50 | ||
51 | /* | |
52 | * Basic message structures. | |
53 | */ | |
54 | struct synthhid_msg_hdr { | |
55 | enum synthhid_msg_type type; | |
56 | u32 size; | |
57 | }; | |
58 | ||
b95f5bcb S |
59 | union synthhid_version { |
60 | struct { | |
61 | u16 minor_version; | |
62 | u16 major_version; | |
63 | }; | |
64 | u32 version; | |
65 | }; | |
66 | ||
67 | /* | |
68 | * Protocol messages | |
69 | */ | |
70 | struct synthhid_protocol_request { | |
71 | struct synthhid_msg_hdr header; | |
72 | union synthhid_version version_requested; | |
73 | }; | |
74 | ||
75 | struct synthhid_protocol_response { | |
76 | struct synthhid_msg_hdr header; | |
77 | union synthhid_version version_requested; | |
78 | unsigned char approved; | |
79 | }; | |
80 | ||
81 | struct synthhid_device_info { | |
82 | struct synthhid_msg_hdr header; | |
83 | struct hv_input_dev_info hid_dev_info; | |
84 | struct hid_descriptor hid_descriptor; | |
85 | }; | |
86 | ||
87 | struct synthhid_device_info_ack { | |
88 | struct synthhid_msg_hdr header; | |
89 | unsigned char reserved; | |
90 | }; | |
91 | ||
92 | struct synthhid_input_report { | |
93 | struct synthhid_msg_hdr header; | |
542f25a9 | 94 | char buffer[]; |
b95f5bcb S |
95 | }; |
96 | ||
97 | #pragma pack(pop) | |
98 | ||
d02a2699 BF |
99 | #define INPUTVSC_SEND_RING_BUFFER_SIZE VMBUS_RING_SIZE(36 * 1024) |
100 | #define INPUTVSC_RECV_RING_BUFFER_SIZE VMBUS_RING_SIZE(36 * 1024) | |
b95f5bcb S |
101 | |
102 | ||
103 | enum pipe_prot_msg_type { | |
104 | PIPE_MESSAGE_INVALID, | |
105 | PIPE_MESSAGE_DATA, | |
106 | PIPE_MESSAGE_MAXIMUM | |
107 | }; | |
108 | ||
109 | ||
110 | struct pipe_prt_msg { | |
111 | enum pipe_prot_msg_type type; | |
112 | u32 size; | |
542f25a9 | 113 | char data[]; |
b95f5bcb S |
114 | }; |
115 | ||
116 | struct mousevsc_prt_msg { | |
117 | enum pipe_prot_msg_type type; | |
118 | u32 size; | |
119 | union { | |
120 | struct synthhid_protocol_request request; | |
121 | struct synthhid_protocol_response response; | |
122 | struct synthhid_device_info_ack ack; | |
123 | }; | |
124 | }; | |
125 | ||
126 | /* | |
127 | * Represents an mousevsc device | |
128 | */ | |
129 | struct mousevsc_dev { | |
130 | struct hv_device *device; | |
131 | bool init_complete; | |
132 | bool connected; | |
133 | struct mousevsc_prt_msg protocol_req; | |
134 | struct mousevsc_prt_msg protocol_resp; | |
135 | /* Synchronize the request/response if needed */ | |
136 | struct completion wait_event; | |
137 | int dev_info_status; | |
138 | ||
139 | struct hid_descriptor *hid_desc; | |
140 | unsigned char *report_desc; | |
141 | u32 report_desc_size; | |
142 | struct hv_input_dev_info hid_dev_info; | |
143 | struct hid_device *hid_device; | |
3ccfd0a8 | 144 | u8 input_buf[HID_MAX_BUFFER_SIZE]; |
b95f5bcb S |
145 | }; |
146 | ||
147 | ||
148 | static struct mousevsc_dev *mousevsc_alloc_device(struct hv_device *device) | |
149 | { | |
150 | struct mousevsc_dev *input_dev; | |
151 | ||
152 | input_dev = kzalloc(sizeof(struct mousevsc_dev), GFP_KERNEL); | |
153 | ||
154 | if (!input_dev) | |
155 | return NULL; | |
156 | ||
157 | input_dev->device = device; | |
158 | hv_set_drvdata(device, input_dev); | |
159 | init_completion(&input_dev->wait_event); | |
160 | input_dev->init_complete = false; | |
161 | ||
162 | return input_dev; | |
163 | } | |
164 | ||
165 | static void mousevsc_free_device(struct mousevsc_dev *device) | |
166 | { | |
167 | kfree(device->hid_desc); | |
168 | kfree(device->report_desc); | |
169 | hv_set_drvdata(device->device, NULL); | |
170 | kfree(device); | |
171 | } | |
172 | ||
173 | static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device, | |
174 | struct synthhid_device_info *device_info) | |
175 | { | |
176 | int ret = 0; | |
177 | struct hid_descriptor *desc; | |
178 | struct mousevsc_prt_msg ack; | |
179 | ||
180 | input_device->dev_info_status = -ENOMEM; | |
181 | ||
182 | input_device->hid_dev_info = device_info->hid_dev_info; | |
183 | desc = &device_info->hid_descriptor; | |
184 | if (desc->bLength == 0) | |
185 | goto cleanup; | |
186 | ||
af13f9ed | 187 | /* The pointer is not NULL when we resume from hibernation */ |
5313b2a5 | 188 | kfree(input_device->hid_desc); |
a4a23f6d | 189 | input_device->hid_desc = kmemdup(desc, desc->bLength, GFP_ATOMIC); |
b95f5bcb S |
190 | |
191 | if (!input_device->hid_desc) | |
192 | goto cleanup; | |
193 | ||
f5f93d7f MK |
194 | input_device->report_desc_size = le16_to_cpu( |
195 | desc->desc[0].wDescriptorLength); | |
b95f5bcb S |
196 | if (input_device->report_desc_size == 0) { |
197 | input_device->dev_info_status = -EINVAL; | |
198 | goto cleanup; | |
199 | } | |
200 | ||
af13f9ed | 201 | /* The pointer is not NULL when we resume from hibernation */ |
5313b2a5 | 202 | kfree(input_device->report_desc); |
b95f5bcb S |
203 | input_device->report_desc = kzalloc(input_device->report_desc_size, |
204 | GFP_ATOMIC); | |
205 | ||
206 | if (!input_device->report_desc) { | |
207 | input_device->dev_info_status = -ENOMEM; | |
208 | goto cleanup; | |
209 | } | |
210 | ||
211 | memcpy(input_device->report_desc, | |
212 | ((unsigned char *)desc) + desc->bLength, | |
f5f93d7f | 213 | le16_to_cpu(desc->desc[0].wDescriptorLength)); |
b95f5bcb S |
214 | |
215 | /* Send the ack */ | |
216 | memset(&ack, 0, sizeof(struct mousevsc_prt_msg)); | |
217 | ||
218 | ack.type = PIPE_MESSAGE_DATA; | |
219 | ack.size = sizeof(struct synthhid_device_info_ack); | |
220 | ||
221 | ack.ack.header.type = SYNTH_HID_INITIAL_DEVICE_INFO_ACK; | |
222 | ack.ack.header.size = 1; | |
223 | ack.ack.reserved = 0; | |
224 | ||
225 | ret = vmbus_sendpacket(input_device->device->channel, | |
226 | &ack, | |
542f25a9 | 227 | sizeof(struct pipe_prt_msg) + |
b95f5bcb S |
228 | sizeof(struct synthhid_device_info_ack), |
229 | (unsigned long)&ack, | |
230 | VM_PKT_DATA_INBAND, | |
231 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
232 | ||
233 | if (!ret) | |
234 | input_device->dev_info_status = 0; | |
235 | ||
236 | cleanup: | |
237 | complete(&input_device->wait_event); | |
238 | ||
239 | return; | |
240 | } | |
241 | ||
242 | static void mousevsc_on_receive(struct hv_device *device, | |
243 | struct vmpacket_descriptor *packet) | |
244 | { | |
245 | struct pipe_prt_msg *pipe_msg; | |
6a462899 | 246 | struct synthhid_msg_hdr *hid_msg_hdr; |
b95f5bcb S |
247 | struct mousevsc_dev *input_dev = hv_get_drvdata(device); |
248 | struct synthhid_input_report *input_report; | |
3ccfd0a8 | 249 | size_t len; |
b95f5bcb S |
250 | |
251 | pipe_msg = (struct pipe_prt_msg *)((unsigned long)packet + | |
252 | (packet->offset8 << 3)); | |
253 | ||
254 | if (pipe_msg->type != PIPE_MESSAGE_DATA) | |
255 | return; | |
256 | ||
6a462899 | 257 | hid_msg_hdr = (struct synthhid_msg_hdr *)pipe_msg->data; |
b95f5bcb | 258 | |
6a462899 | 259 | switch (hid_msg_hdr->type) { |
b95f5bcb | 260 | case SYNTH_HID_PROTOCOL_RESPONSE: |
5f151364 AB |
261 | len = struct_size(pipe_msg, data, pipe_msg->size); |
262 | ||
b95f5bcb S |
263 | /* |
264 | * While it will be impossible for us to protect against | |
265 | * malicious/buggy hypervisor/host, add a check here to | |
266 | * ensure we don't corrupt memory. | |
267 | */ | |
5f151364 | 268 | if (WARN_ON(len > sizeof(struct mousevsc_prt_msg))) |
b95f5bcb | 269 | break; |
b95f5bcb | 270 | |
5f151364 | 271 | memcpy(&input_dev->protocol_resp, pipe_msg, len); |
b95f5bcb S |
272 | complete(&input_dev->wait_event); |
273 | break; | |
274 | ||
275 | case SYNTH_HID_INITIAL_DEVICE_INFO: | |
276 | WARN_ON(pipe_msg->size < sizeof(struct hv_input_dev_info)); | |
277 | ||
278 | /* | |
279 | * Parse out the device info into device attr, | |
280 | * hid desc and report desc | |
281 | */ | |
282 | mousevsc_on_receive_device_info(input_dev, | |
283 | (struct synthhid_device_info *)pipe_msg->data); | |
284 | break; | |
285 | case SYNTH_HID_INPUT_REPORT: | |
286 | input_report = | |
287 | (struct synthhid_input_report *)pipe_msg->data; | |
288 | if (!input_dev->init_complete) | |
289 | break; | |
3ccfd0a8 DH |
290 | |
291 | len = min(input_report->header.size, | |
292 | (u32)sizeof(input_dev->input_buf)); | |
293 | memcpy(input_dev->input_buf, input_report->buffer, len); | |
294 | hid_input_report(input_dev->hid_device, HID_INPUT_REPORT, | |
295 | input_dev->input_buf, len, 1); | |
f1210455 | 296 | |
10f91c73 | 297 | pm_wakeup_hard_event(&input_dev->device->device); |
f1210455 | 298 | |
b95f5bcb S |
299 | break; |
300 | default: | |
af423779 | 301 | pr_err("unsupported hid msg type - type %d len %d\n", |
6a462899 | 302 | hid_msg_hdr->type, hid_msg_hdr->size); |
b95f5bcb S |
303 | break; |
304 | } | |
305 | ||
306 | } | |
307 | ||
308 | static void mousevsc_on_channel_callback(void *context) | |
309 | { | |
b95f5bcb | 310 | struct hv_device *device = context; |
b95f5bcb | 311 | struct vmpacket_descriptor *desc; |
b95f5bcb | 312 | |
6a297c90 DC |
313 | foreach_vmbus_pkt(desc, device->channel) { |
314 | switch (desc->type) { | |
315 | case VM_PKT_COMP: | |
b95f5bcb S |
316 | break; |
317 | ||
6a297c90 DC |
318 | case VM_PKT_DATA_INBAND: |
319 | mousevsc_on_receive(device, desc); | |
320 | break; | |
b95f5bcb | 321 | |
6a297c90 DC |
322 | default: |
323 | pr_err("Unhandled packet type %d, tid %llx len %d\n", | |
324 | desc->type, desc->trans_id, desc->len8 * 8); | |
b95f5bcb S |
325 | break; |
326 | } | |
6a297c90 | 327 | } |
b95f5bcb S |
328 | } |
329 | ||
330 | static int mousevsc_connect_to_vsp(struct hv_device *device) | |
331 | { | |
332 | int ret = 0; | |
3458e4c0 | 333 | unsigned long t; |
b95f5bcb S |
334 | struct mousevsc_dev *input_dev = hv_get_drvdata(device); |
335 | struct mousevsc_prt_msg *request; | |
336 | struct mousevsc_prt_msg *response; | |
337 | ||
af13f9ed DC |
338 | reinit_completion(&input_dev->wait_event); |
339 | ||
b95f5bcb S |
340 | request = &input_dev->protocol_req; |
341 | memset(request, 0, sizeof(struct mousevsc_prt_msg)); | |
342 | ||
343 | request->type = PIPE_MESSAGE_DATA; | |
344 | request->size = sizeof(struct synthhid_protocol_request); | |
345 | request->request.header.type = SYNTH_HID_PROTOCOL_REQUEST; | |
346 | request->request.header.size = sizeof(unsigned int); | |
347 | request->request.version_requested.version = SYNTHHID_INPUT_VERSION; | |
348 | ||
349 | ret = vmbus_sendpacket(device->channel, request, | |
542f25a9 | 350 | sizeof(struct pipe_prt_msg) + |
b95f5bcb S |
351 | sizeof(struct synthhid_protocol_request), |
352 | (unsigned long)request, | |
353 | VM_PKT_DATA_INBAND, | |
354 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
355 | if (ret) | |
356 | goto cleanup; | |
357 | ||
358 | t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ); | |
359 | if (!t) { | |
360 | ret = -ETIMEDOUT; | |
361 | goto cleanup; | |
362 | } | |
363 | ||
364 | response = &input_dev->protocol_resp; | |
365 | ||
366 | if (!response->response.approved) { | |
367 | pr_err("synthhid protocol request failed (version %d)\n", | |
368 | SYNTHHID_INPUT_VERSION); | |
369 | ret = -ENODEV; | |
370 | goto cleanup; | |
371 | } | |
372 | ||
373 | t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ); | |
374 | if (!t) { | |
375 | ret = -ETIMEDOUT; | |
376 | goto cleanup; | |
377 | } | |
378 | ||
379 | /* | |
380 | * We should have gotten the device attr, hid desc and report | |
381 | * desc at this point | |
382 | */ | |
383 | ret = input_dev->dev_info_status; | |
384 | ||
385 | cleanup: | |
386 | return ret; | |
387 | } | |
388 | ||
07d9ab4f HR |
389 | static int mousevsc_hid_parse(struct hid_device *hid) |
390 | { | |
391 | struct hv_device *dev = hid_get_drvdata(hid); | |
392 | struct mousevsc_dev *input_dev = hv_get_drvdata(dev); | |
393 | ||
394 | return hid_parse_report(hid, input_dev->report_desc, | |
395 | input_dev->report_desc_size); | |
396 | } | |
397 | ||
b95f5bcb S |
398 | static int mousevsc_hid_open(struct hid_device *hid) |
399 | { | |
400 | return 0; | |
401 | } | |
402 | ||
403 | static int mousevsc_hid_start(struct hid_device *hid) | |
404 | { | |
405 | return 0; | |
406 | } | |
407 | ||
408 | static void mousevsc_hid_close(struct hid_device *hid) | |
409 | { | |
410 | } | |
411 | ||
412 | static void mousevsc_hid_stop(struct hid_device *hid) | |
413 | { | |
414 | } | |
415 | ||
269ddfc6 S |
416 | static int mousevsc_hid_raw_request(struct hid_device *hid, |
417 | unsigned char report_num, | |
c3d77fab | 418 | __u8 *buf, size_t len, |
269ddfc6 S |
419 | unsigned char rtype, |
420 | int reqtype) | |
421 | { | |
422 | return 0; | |
423 | } | |
424 | ||
d38213a9 | 425 | static const struct hid_ll_driver mousevsc_ll_driver = { |
07d9ab4f | 426 | .parse = mousevsc_hid_parse, |
b95f5bcb S |
427 | .open = mousevsc_hid_open, |
428 | .close = mousevsc_hid_close, | |
429 | .start = mousevsc_hid_start, | |
430 | .stop = mousevsc_hid_stop, | |
269ddfc6 | 431 | .raw_request = mousevsc_hid_raw_request, |
b95f5bcb S |
432 | }; |
433 | ||
434 | static struct hid_driver mousevsc_hid_driver; | |
435 | ||
436 | static int mousevsc_probe(struct hv_device *device, | |
437 | const struct hv_vmbus_device_id *dev_id) | |
438 | { | |
439 | int ret; | |
440 | struct mousevsc_dev *input_dev; | |
441 | struct hid_device *hid_dev; | |
442 | ||
443 | input_dev = mousevsc_alloc_device(device); | |
444 | ||
445 | if (!input_dev) | |
446 | return -ENOMEM; | |
447 | ||
448 | ret = vmbus_open(device->channel, | |
449 | INPUTVSC_SEND_RING_BUFFER_SIZE, | |
450 | INPUTVSC_RECV_RING_BUFFER_SIZE, | |
451 | NULL, | |
452 | 0, | |
453 | mousevsc_on_channel_callback, | |
454 | device | |
455 | ); | |
456 | ||
457 | if (ret) | |
458 | goto probe_err0; | |
459 | ||
460 | ret = mousevsc_connect_to_vsp(device); | |
461 | ||
462 | if (ret) | |
463 | goto probe_err1; | |
464 | ||
465 | /* workaround SA-167 */ | |
466 | if (input_dev->report_desc[14] == 0x25) | |
467 | input_dev->report_desc[14] = 0x29; | |
468 | ||
469 | hid_dev = hid_allocate_device(); | |
470 | if (IS_ERR(hid_dev)) { | |
471 | ret = PTR_ERR(hid_dev); | |
472 | goto probe_err1; | |
473 | } | |
474 | ||
475 | hid_dev->ll_driver = &mousevsc_ll_driver; | |
476 | hid_dev->driver = &mousevsc_hid_driver; | |
477 | hid_dev->bus = BUS_VIRTUAL; | |
478 | hid_dev->vendor = input_dev->hid_dev_info.vendor; | |
479 | hid_dev->product = input_dev->hid_dev_info.product; | |
480 | hid_dev->version = input_dev->hid_dev_info.version; | |
481 | input_dev->hid_device = hid_dev; | |
482 | ||
483 | sprintf(hid_dev->name, "%s", "Microsoft Vmbus HID-compliant Mouse"); | |
484 | ||
b565a390 S |
485 | hid_set_drvdata(hid_dev, device); |
486 | ||
74c4fb05 S |
487 | ret = hid_add_device(hid_dev); |
488 | if (ret) | |
b5bcb94b | 489 | goto probe_err2; |
74c4fb05 | 490 | |
b95f5bcb | 491 | |
07d9ab4f | 492 | ret = hid_parse(hid_dev); |
b95f5bcb S |
493 | if (ret) { |
494 | hid_err(hid_dev, "parse failed\n"); | |
495 | goto probe_err2; | |
496 | } | |
497 | ||
498 | ret = hid_hw_start(hid_dev, HID_CONNECT_HIDINPUT | HID_CONNECT_HIDDEV); | |
499 | ||
500 | if (ret) { | |
501 | hid_err(hid_dev, "hw start failed\n"); | |
502 | goto probe_err2; | |
503 | } | |
504 | ||
f1210455 DC |
505 | device_init_wakeup(&device->device, true); |
506 | ||
b95f5bcb S |
507 | input_dev->connected = true; |
508 | input_dev->init_complete = true; | |
509 | ||
510 | return ret; | |
511 | ||
512 | probe_err2: | |
513 | hid_destroy_device(hid_dev); | |
514 | ||
515 | probe_err1: | |
516 | vmbus_close(device->channel); | |
517 | ||
518 | probe_err0: | |
519 | mousevsc_free_device(input_dev); | |
520 | ||
521 | return ret; | |
522 | } | |
523 | ||
524 | ||
96ec2939 | 525 | static void mousevsc_remove(struct hv_device *dev) |
b95f5bcb S |
526 | { |
527 | struct mousevsc_dev *input_dev = hv_get_drvdata(dev); | |
528 | ||
f1210455 | 529 | device_init_wakeup(&dev->device, false); |
b95f5bcb | 530 | vmbus_close(dev->channel); |
c1c454b8 | 531 | hid_hw_stop(input_dev->hid_device); |
b95f5bcb S |
532 | hid_destroy_device(input_dev->hid_device); |
533 | mousevsc_free_device(input_dev); | |
b95f5bcb S |
534 | } |
535 | ||
af13f9ed DC |
536 | static int mousevsc_suspend(struct hv_device *dev) |
537 | { | |
538 | vmbus_close(dev->channel); | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
543 | static int mousevsc_resume(struct hv_device *dev) | |
544 | { | |
545 | int ret; | |
546 | ||
547 | ret = vmbus_open(dev->channel, | |
548 | INPUTVSC_SEND_RING_BUFFER_SIZE, | |
549 | INPUTVSC_RECV_RING_BUFFER_SIZE, | |
550 | NULL, 0, | |
551 | mousevsc_on_channel_callback, | |
552 | dev); | |
553 | if (ret) | |
554 | return ret; | |
555 | ||
556 | ret = mousevsc_connect_to_vsp(dev); | |
557 | return ret; | |
558 | } | |
559 | ||
b95f5bcb S |
560 | static const struct hv_vmbus_device_id id_table[] = { |
561 | /* Mouse guid */ | |
048c5add | 562 | { HV_MOUSE_GUID, }, |
b95f5bcb S |
563 | { }, |
564 | }; | |
565 | ||
566 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
567 | ||
568 | static struct hv_driver mousevsc_drv = { | |
569 | .name = KBUILD_MODNAME, | |
570 | .id_table = id_table, | |
571 | .probe = mousevsc_probe, | |
572 | .remove = mousevsc_remove, | |
af13f9ed DC |
573 | .suspend = mousevsc_suspend, |
574 | .resume = mousevsc_resume, | |
af0a5646 AV |
575 | .driver = { |
576 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, | |
577 | }, | |
b95f5bcb S |
578 | }; |
579 | ||
580 | static int __init mousevsc_init(void) | |
581 | { | |
582 | return vmbus_driver_register(&mousevsc_drv); | |
583 | } | |
584 | ||
585 | static void __exit mousevsc_exit(void) | |
586 | { | |
587 | vmbus_driver_unregister(&mousevsc_drv); | |
588 | } | |
589 | ||
590 | MODULE_LICENSE("GPL"); | |
64caea53 JS |
591 | MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic HID Driver"); |
592 | ||
b95f5bcb S |
593 | module_init(mousevsc_init); |
594 | module_exit(mousevsc_exit); |