2 * Copyright (c) 2009, Citrix Systems, Inc.
3 * Copyright (c) 2010, Microsoft Corporation.
4 * Copyright (c) 2011, Novell Inc.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/device.h>
18 #include <linux/workqueue.h>
19 #include <linux/sched.h>
20 #include <linux/wait.h>
21 #include <linux/input.h>
22 #include <linux/hid.h>
23 #include <linux/hiddev.h>
24 #include <linux/pci.h>
25 #include <linux/dmi.h>
29 #include "version_info.h"
31 #include "vmbus_api.h"
33 #include "vmbus_packet_format.h"
39 struct hv_input_dev_info {
40 unsigned short vendor;
41 unsigned short product;
42 unsigned short version;
46 /* Represents the input vsc driver */
47 /* FIXME - can be removed entirely */
48 struct mousevsc_drv_obj {
49 struct hv_driver Base;
53 /* The maximum size of a synthetic input message. */
54 #define SYNTHHID_MAX_INPUT_REPORT_SIZE 16
60 * Beta, RC < 2008/1/22 1,0
63 #define SYNTHHID_INPUT_VERSION_MAJOR 2
64 #define SYNTHHID_INPUT_VERSION_MINOR 0
65 #define SYNTHHID_INPUT_VERSION (SYNTHHID_INPUT_VERSION_MINOR | \
66 (SYNTHHID_INPUT_VERSION_MAJOR << 16))
71 * Message types in the synthetic input protocol
73 enum synthhid_msg_type {
74 SynthHidProtocolRequest,
75 SynthHidProtocolResponse,
76 SynthHidInitialDeviceInfo,
77 SynthHidInitialDeviceInfoAck,
83 * Basic message structures.
85 struct synthhid_msg_hdr {
86 enum synthhid_msg_type type;
91 struct synthhid_msg_hdr header;
92 char data[1]; /* Enclosed message */
95 union synthhid_version {
106 struct synthhid_protocol_request {
107 struct synthhid_msg_hdr header;
108 union synthhid_version version_requested;
111 struct synthhid_protocol_response {
112 struct synthhid_msg_hdr header;
113 union synthhid_version version_requested;
114 unsigned char approved;
117 struct synthhid_device_info {
118 struct synthhid_msg_hdr header;
119 struct hv_input_dev_info hid_dev_info;
120 struct hid_descriptor hid_descriptor;
123 struct synthhid_device_info_ack {
124 struct synthhid_msg_hdr header;
125 unsigned char reserved;
128 struct synthhid_input_report {
129 struct synthhid_msg_hdr header;
135 #define INPUTVSC_SEND_RING_BUFFER_SIZE 10*PAGE_SIZE
136 #define INPUTVSC_RECV_RING_BUFFER_SIZE 10*PAGE_SIZE
138 #define NBITS(x) (((x)/BITS_PER_LONG)+1)
140 enum pipe_prot_msg_type {
141 PipeMessageInvalid = 0,
147 struct pipe_prt_msg {
148 enum pipe_prot_msg_type type;
156 struct mousevsc_prt_msg {
157 enum pipe_prot_msg_type type;
160 struct synthhid_protocol_request request;
161 struct synthhid_protocol_response response;
162 struct synthhid_device_info_ack ack;
167 * Represents an mousevsc device
169 struct mousevsc_dev {
170 struct hv_device *Device;
171 /* 0 indicates the device is being destroyed */
173 int NumOutstandingRequests;
174 unsigned char bInitializeComplete;
175 struct mousevsc_prt_msg ProtocolReq;
176 struct mousevsc_prt_msg ProtocolResp;
177 /* Synchronize the request/response if needed */
178 wait_queue_head_t ProtocolWaitEvent;
179 wait_queue_head_t DeviceInfoWaitEvent;
180 int protocol_wait_condition;
181 int device_wait_condition;
182 int DeviceInfoStatus;
184 struct hid_descriptor *HidDesc;
185 unsigned char *ReportDesc;
187 struct hv_input_dev_info hid_dev_info;
191 static const char *driver_name = "mousevsc";
193 /* {CFA8B69E-5B4A-4cc0-B98B-8BA1A1F3F95A} */
194 static const struct hv_guid mouse_guid = {
195 .data = {0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c,
196 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A}
199 static void deviceinfo_callback(struct hv_device *dev, struct hv_input_dev_info *info);
200 static void inputreport_callback(struct hv_device *dev, void *packet, u32 len);
201 static void reportdesc_callback(struct hv_device *dev, void *packet, u32 len);
203 static struct mousevsc_dev *AllocInputDevice(struct hv_device *Device)
205 struct mousevsc_dev *inputDevice;
207 inputDevice = kzalloc(sizeof(struct mousevsc_dev), GFP_KERNEL);
213 * Set to 2 to allow both inbound and outbound traffics
214 * (ie GetInputDevice() and MustGetInputDevice()) to proceed.
216 atomic_cmpxchg(&inputDevice->RefCount, 0, 2);
218 inputDevice->Device = Device;
219 Device->ext = inputDevice;
224 static void FreeInputDevice(struct mousevsc_dev *Device)
226 WARN_ON(atomic_read(&Device->RefCount) == 0);
231 * Get the inputdevice object if exists and its refcount > 1
233 static struct mousevsc_dev *GetInputDevice(struct hv_device *Device)
235 struct mousevsc_dev *inputDevice;
237 inputDevice = (struct mousevsc_dev *)Device->ext;
241 * This sure isn't a valid thing to print for debugging, no matter
242 * what the intention is...
244 * printk(KERN_ERR "-------------------------> REFCOUNT = %d",
245 * inputDevice->RefCount);
248 if (inputDevice && atomic_read(&inputDevice->RefCount) > 1)
249 atomic_inc(&inputDevice->RefCount);
257 * Get the inputdevice object iff exists and its refcount > 0
259 static struct mousevsc_dev *MustGetInputDevice(struct hv_device *Device)
261 struct mousevsc_dev *inputDevice;
263 inputDevice = (struct mousevsc_dev *)Device->ext;
265 if (inputDevice && atomic_read(&inputDevice->RefCount))
266 atomic_inc(&inputDevice->RefCount);
273 static void PutInputDevice(struct hv_device *Device)
275 struct mousevsc_dev *inputDevice;
277 inputDevice = (struct mousevsc_dev *)Device->ext;
279 atomic_dec(&inputDevice->RefCount);
283 * Drop ref count to 1 to effectively disable GetInputDevice()
285 static struct mousevsc_dev *ReleaseInputDevice(struct hv_device *Device)
287 struct mousevsc_dev *inputDevice;
289 inputDevice = (struct mousevsc_dev *)Device->ext;
291 /* Busy wait until the ref drop to 2, then set it to 1 */
292 while (atomic_cmpxchg(&inputDevice->RefCount, 2, 1) != 2)
299 * Drop ref count to 0. No one can use InputDevice object.
301 static struct mousevsc_dev *FinalReleaseInputDevice(struct hv_device *Device)
303 struct mousevsc_dev *inputDevice;
305 inputDevice = (struct mousevsc_dev *)Device->ext;
307 /* Busy wait until the ref drop to 1, then set it to 0 */
308 while (atomic_cmpxchg(&inputDevice->RefCount, 1, 0) != 1)
315 static void MousevscOnSendCompletion(struct hv_device *Device, struct vmpacket_descriptor *Packet)
317 struct mousevsc_dev *inputDevice;
320 inputDevice = MustGetInputDevice(Device);
322 pr_err("unable to get input device...device being destroyed?");
326 request = (void *)(unsigned long)Packet->trans_id;
328 if (request == &inputDevice->ProtocolReq) {
330 /* Shouldn't we be doing something here? */
333 PutInputDevice(Device);
336 static void MousevscOnReceiveDeviceInfo(struct mousevsc_dev *InputDevice, struct synthhid_device_info *DeviceInfo)
339 struct hid_descriptor *desc;
340 struct mousevsc_prt_msg ack;
342 /* Assume success for now */
343 InputDevice->DeviceInfoStatus = 0;
345 /* Save the device attr */
346 memcpy(&InputDevice->hid_dev_info, &DeviceInfo->hid_dev_info, sizeof(struct hv_input_dev_info));
348 /* Save the hid desc */
349 desc = &DeviceInfo->hid_descriptor;
350 WARN_ON(desc->bLength > 0);
352 InputDevice->HidDesc = kzalloc(desc->bLength, GFP_KERNEL);
354 if (!InputDevice->HidDesc) {
355 pr_err("unable to allocate hid descriptor - size %d", desc->bLength);
359 memcpy(InputDevice->HidDesc, desc, desc->bLength);
361 /* Save the report desc */
362 InputDevice->ReportDescSize = desc->desc[0].wDescriptorLength;
363 InputDevice->ReportDesc = kzalloc(InputDevice->ReportDescSize,
366 if (!InputDevice->ReportDesc) {
367 pr_err("unable to allocate report descriptor - size %d",
368 InputDevice->ReportDescSize);
372 memcpy(InputDevice->ReportDesc,
373 ((unsigned char *)desc) + desc->bLength,
374 desc->desc[0].wDescriptorLength);
377 memset(&ack, sizeof(struct mousevsc_prt_msg), 0);
379 ack.type = PipeMessageData;
380 ack.size = sizeof(struct synthhid_device_info_ack);
382 ack.ack.header.type = SynthHidInitialDeviceInfoAck;
383 ack.ack.header.size = 1;
384 ack.ack.reserved = 0;
386 ret = vmbus_sendpacket(InputDevice->Device->channel,
388 sizeof(struct pipe_prt_msg) - sizeof(unsigned char) +
389 sizeof(struct synthhid_device_info_ack),
392 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
394 pr_err("unable to send synthhid device info ack - ret %d",
399 InputDevice->device_wait_condition = 1;
400 wake_up(&InputDevice->DeviceInfoWaitEvent);
405 if (InputDevice->HidDesc) {
406 kfree(InputDevice->HidDesc);
407 InputDevice->HidDesc = NULL;
410 if (InputDevice->ReportDesc) {
411 kfree(InputDevice->ReportDesc);
412 InputDevice->ReportDesc = NULL;
415 InputDevice->DeviceInfoStatus = -1;
416 InputDevice->device_wait_condition = 1;
417 wake_up(&InputDevice->DeviceInfoWaitEvent);
420 static void MousevscOnReceiveInputReport(struct mousevsc_dev *InputDevice, struct synthhid_input_report *InputReport)
422 struct mousevsc_drv_obj *inputDriver;
424 if (!InputDevice->bInitializeComplete) {
425 pr_info("Initialization incomplete...ignoring InputReport msg");
429 inputDriver = (struct mousevsc_drv_obj *)InputDevice->Device->drv;
431 inputreport_callback(InputDevice->Device,
433 InputReport->header.size);
436 static void MousevscOnReceive(struct hv_device *Device, struct vmpacket_descriptor *Packet)
438 struct pipe_prt_msg *pipeMsg;
439 struct synthhid_msg *hidMsg;
440 struct mousevsc_dev *inputDevice;
442 inputDevice = MustGetInputDevice(Device);
444 pr_err("unable to get input device...device being destroyed?");
448 pipeMsg = (struct pipe_prt_msg *)((unsigned long)Packet + (Packet->offset8 << 3));
450 if (pipeMsg->type != PipeMessageData) {
451 pr_err("unknown pipe msg type - type %d len %d",
452 pipeMsg->type, pipeMsg->size);
453 PutInputDevice(Device);
457 hidMsg = (struct synthhid_msg *)&pipeMsg->data[0];
459 switch (hidMsg->header.type) {
460 case SynthHidProtocolResponse:
461 memcpy(&inputDevice->ProtocolResp, pipeMsg,
462 pipeMsg->size + sizeof(struct pipe_prt_msg) -
463 sizeof(unsigned char));
464 inputDevice->protocol_wait_condition = 1;
465 wake_up(&inputDevice->ProtocolWaitEvent);
468 case SynthHidInitialDeviceInfo:
469 WARN_ON(pipeMsg->size >= sizeof(struct hv_input_dev_info));
472 * Parse out the device info into device attr,
473 * hid desc and report desc
475 MousevscOnReceiveDeviceInfo(inputDevice,
476 (struct synthhid_device_info *)&pipeMsg->data[0]);
478 case SynthHidInputReport:
479 MousevscOnReceiveInputReport(inputDevice,
480 (struct synthhid_input_report *)&pipeMsg->data[0]);
484 pr_err("unsupported hid msg type - type %d len %d",
485 hidMsg->header.type, hidMsg->header.size);
489 PutInputDevice(Device);
492 static void MousevscOnChannelCallback(void *Context)
494 const int packetSize = 0x100;
496 struct hv_device *device = (struct hv_device *)Context;
497 struct mousevsc_dev *inputDevice;
501 unsigned char packet[packetSize];
502 struct vmpacket_descriptor *desc;
503 unsigned char *buffer = packet;
504 int bufferlen = packetSize;
506 inputDevice = MustGetInputDevice(device);
509 pr_err("unable to get input device...device being destroyed?");
514 ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen, &bytesRecvd, &requestId);
517 if (bytesRecvd > 0) {
518 desc = (struct vmpacket_descriptor *)buffer;
520 switch (desc->type) {
522 MousevscOnSendCompletion(device,
526 case VM_PKT_DATA_INBAND:
527 MousevscOnReceive(device, desc);
531 pr_err("unhandled packet type %d, tid %llx len %d\n",
539 if (bufferlen > packetSize) {
543 bufferlen = packetSize;
547 * pr_debug("nothing else to read...");
550 if (bufferlen > packetSize) {
554 bufferlen = packetSize;
558 } else if (ret == -2) {
559 /* Handle large packet */
560 bufferlen = bytesRecvd;
561 buffer = kzalloc(bytesRecvd, GFP_KERNEL);
563 if (buffer == NULL) {
565 bufferlen = packetSize;
567 /* Try again next time around */
568 pr_err("unable to allocate buffer of size %d!",
575 PutInputDevice(device);
580 static int MousevscConnectToVsp(struct hv_device *Device)
583 struct mousevsc_dev *inputDevice;
584 struct mousevsc_prt_msg *request;
585 struct mousevsc_prt_msg *response;
587 inputDevice = GetInputDevice(Device);
590 pr_err("unable to get input device...device being destroyed?");
594 init_waitqueue_head(&inputDevice->ProtocolWaitEvent);
595 init_waitqueue_head(&inputDevice->DeviceInfoWaitEvent);
597 request = &inputDevice->ProtocolReq;
600 * Now, initiate the vsc/vsp initialization protocol on the open channel
602 memset(request, sizeof(struct mousevsc_prt_msg), 0);
604 request->type = PipeMessageData;
605 request->size = sizeof(struct synthhid_protocol_request);
607 request->request.header.type = SynthHidProtocolRequest;
608 request->request.header.size = sizeof(unsigned long);
609 request->request.version_requested.version = SYNTHHID_INPUT_VERSION;
611 pr_info("synthhid protocol request...");
613 ret = vmbus_sendpacket(Device->channel, request,
614 sizeof(struct pipe_prt_msg) -
615 sizeof(unsigned char) +
616 sizeof(struct synthhid_protocol_request),
617 (unsigned long)request,
619 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
621 pr_err("unable to send synthhid protocol request.");
625 inputDevice->protocol_wait_condition = 0;
626 wait_event_timeout(inputDevice->ProtocolWaitEvent, inputDevice->protocol_wait_condition, msecs_to_jiffies(1000));
627 if (inputDevice->protocol_wait_condition == 0) {
632 response = &inputDevice->ProtocolResp;
634 if (!response->response.approved) {
635 pr_err("synthhid protocol request failed (version %d)",
636 SYNTHHID_INPUT_VERSION);
641 inputDevice->device_wait_condition = 0;
642 wait_event_timeout(inputDevice->DeviceInfoWaitEvent, inputDevice->device_wait_condition, msecs_to_jiffies(1000));
643 if (inputDevice->device_wait_condition == 0) {
649 * We should have gotten the device attr, hid desc and report
652 if (!inputDevice->DeviceInfoStatus)
653 pr_info("**** input channel up and running!! ****");
658 PutInputDevice(Device);
663 static int MousevscOnDeviceAdd(struct hv_device *Device, void *AdditionalInfo)
666 struct mousevsc_dev *inputDevice;
667 struct mousevsc_drv_obj *inputDriver;
668 struct hv_input_dev_info dev_info;
670 inputDevice = AllocInputDevice(Device);
677 inputDevice->bInitializeComplete = false;
679 /* Open the channel */
680 ret = vmbus_open(Device->channel,
681 INPUTVSC_SEND_RING_BUFFER_SIZE,
682 INPUTVSC_RECV_RING_BUFFER_SIZE,
685 MousevscOnChannelCallback,
690 pr_err("unable to open channel: %d", ret);
694 pr_info("InputVsc channel open: %d", ret);
696 ret = MousevscConnectToVsp(Device);
699 pr_err("unable to connect channel: %d", ret);
701 vmbus_close(Device->channel);
705 inputDriver = (struct mousevsc_drv_obj *)inputDevice->Device->drv;
707 dev_info.vendor = inputDevice->hid_dev_info.vendor;
708 dev_info.product = inputDevice->hid_dev_info.product;
709 dev_info.version = inputDevice->hid_dev_info.version;
710 strcpy(dev_info.name, "Microsoft Vmbus HID-compliant Mouse");
712 /* Send the device info back up */
713 deviceinfo_callback(Device, &dev_info);
715 /* Send the report desc back up */
716 /* workaround SA-167 */
717 if (inputDevice->ReportDesc[14] == 0x25)
718 inputDevice->ReportDesc[14] = 0x29;
720 reportdesc_callback(Device, inputDevice->ReportDesc,
721 inputDevice->ReportDescSize);
723 inputDevice->bInitializeComplete = true;
729 static int MousevscOnDeviceRemove(struct hv_device *Device)
731 struct mousevsc_dev *inputDevice;
734 pr_info("disabling input device (%p)...",
737 inputDevice = ReleaseInputDevice(Device);
741 * At this point, all outbound traffic should be disable. We only
742 * allow inbound traffic (responses) to proceed
744 * so that outstanding requests can be completed.
746 while (inputDevice->NumOutstandingRequests) {
747 pr_info("waiting for %d requests to complete...", inputDevice->NumOutstandingRequests);
752 pr_info("removing input device (%p)...", Device->ext);
754 inputDevice = FinalReleaseInputDevice(Device);
756 pr_info("input device (%p) safe to remove", inputDevice);
758 /* Close the channel */
759 vmbus_close(Device->channel);
761 FreeInputDevice(inputDevice);
766 static void MousevscOnCleanup(struct hv_driver *drv)
773 struct input_device_context {
774 struct vm_device *device_ctx;
775 struct hid_device *hid_device;
776 struct hv_input_dev_info device_info;
780 struct mousevsc_driver_context {
781 struct mousevsc_drv_obj drv_obj;
784 static struct mousevsc_driver_context g_mousevsc_drv;
786 static void deviceinfo_callback(struct hv_device *dev, struct hv_input_dev_info *info)
788 struct vm_device *device_ctx = to_vm_device(dev);
789 struct input_device_context *input_device_ctx =
790 dev_get_drvdata(&device_ctx->device);
792 memcpy(&input_device_ctx->device_info, info,
793 sizeof(struct hv_input_dev_info));
795 DPRINT_INFO(INPUTVSC_DRV, "%s", __func__);
798 static void inputreport_callback(struct hv_device *dev, void *packet, u32 len)
802 struct vm_device *device_ctx = to_vm_device(dev);
803 struct input_device_context *input_dev_ctx =
804 dev_get_drvdata(&device_ctx->device);
806 ret = hid_input_report(input_dev_ctx->hid_device,
807 HID_INPUT_REPORT, packet, len, 1);
809 DPRINT_DBG(INPUTVSC_DRV, "hid_input_report (ret %d)", ret);
812 static int mousevsc_hid_open(struct hid_device *hid)
817 static void mousevsc_hid_close(struct hid_device *hid)
821 static int mousevsc_probe(struct device *device)
825 struct hv_driver *drv =
826 drv_to_hv_drv(device->driver);
827 struct mousevsc_driver_context *mousevsc_drv_ctx =
828 (struct mousevsc_driver_context *)drv->priv;
829 struct mousevsc_drv_obj *mousevsc_drv_obj = &mousevsc_drv_ctx->drv_obj;
831 struct vm_device *device_ctx = device_to_vm_device(device);
832 struct hv_device *device_obj = &device_ctx->device_obj;
833 struct input_device_context *input_dev_ctx;
835 input_dev_ctx = kmalloc(sizeof(struct input_device_context),
838 dev_set_drvdata(device, input_dev_ctx);
840 /* Call to the vsc driver to add the device */
841 ret = mousevsc_drv_obj->Base.dev_add(device_obj, NULL);
844 DPRINT_ERR(INPUTVSC_DRV, "unable to add input vsc device");
852 static int mousevsc_remove(struct device *device)
856 struct hv_driver *drv =
857 drv_to_hv_drv(device->driver);
858 struct mousevsc_driver_context *mousevsc_drv_ctx =
859 (struct mousevsc_driver_context *)drv->priv;
860 struct mousevsc_drv_obj *mousevsc_drv_obj = &mousevsc_drv_ctx->drv_obj;
862 struct vm_device *device_ctx = device_to_vm_device(device);
863 struct hv_device *device_obj = &device_ctx->device_obj;
864 struct input_device_context *input_dev_ctx;
866 input_dev_ctx = kmalloc(sizeof(struct input_device_context),
869 dev_set_drvdata(device, input_dev_ctx);
871 if (input_dev_ctx->connected) {
872 hidinput_disconnect(input_dev_ctx->hid_device);
873 input_dev_ctx->connected = 0;
876 if (!mousevsc_drv_obj->Base.dev_rm)
880 * Call to the vsc driver to let it know that the device
883 ret = mousevsc_drv_obj->Base.dev_rm(device_obj);
886 DPRINT_ERR(INPUTVSC_DRV,
887 "unable to remove vsc device (ret %d)", ret);
890 kfree(input_dev_ctx);
895 static void reportdesc_callback(struct hv_device *dev, void *packet, u32 len)
897 struct vm_device *device_ctx = to_vm_device(dev);
898 struct input_device_context *input_device_ctx =
899 dev_get_drvdata(&device_ctx->device);
900 struct hid_device *hid_dev;
902 /* hid_debug = -1; */
903 hid_dev = kmalloc(sizeof(struct hid_device), GFP_KERNEL);
905 if (hid_parse_report(hid_dev, packet, len)) {
906 DPRINT_INFO(INPUTVSC_DRV, "Unable to call hd_parse_report");
911 DPRINT_INFO(INPUTVSC_DRV, "hid_device created");
913 hid_dev->ll_driver->open = mousevsc_hid_open;
914 hid_dev->ll_driver->close = mousevsc_hid_close;
916 hid_dev->bus = BUS_VIRTUAL;
917 hid_dev->vendor = input_device_ctx->device_info.vendor;
918 hid_dev->product = input_device_ctx->device_info.product;
919 hid_dev->version = input_device_ctx->device_info.version;
920 hid_dev->dev = device_ctx->device;
922 sprintf(hid_dev->name, "%s",
923 input_device_ctx->device_info.name);
926 * HJ Do we want to call it with a 0
928 if (!hidinput_connect(hid_dev, 0)) {
929 hid_dev->claimed |= HID_CLAIMED_INPUT;
931 input_device_ctx->connected = 1;
933 DPRINT_INFO(INPUTVSC_DRV,
934 "HID device claimed by input\n");
937 if (!hid_dev->claimed) {
938 DPRINT_ERR(INPUTVSC_DRV,
939 "HID device not claimed by "
940 "input or hiddev\n");
943 input_device_ctx->hid_device = hid_dev;
949 static int mousevsc_drv_exit_cb(struct device *dev, void *data)
951 struct device **curr = (struct device **)data;
957 static void mousevsc_drv_exit(void)
959 struct mousevsc_drv_obj *mousevsc_drv_obj = &g_mousevsc_drv.drv_obj;
960 struct hv_driver *drv = &g_mousevsc_drv.drv_obj.Base;
963 struct device *current_dev = NULL;
969 ret = driver_for_each_device(&drv->driver, NULL,
970 (void *)¤t_dev,
971 mousevsc_drv_exit_cb);
973 printk(KERN_ERR "Can't find mouse device!\n");
975 if (current_dev == NULL)
978 /* Initiate removal from the top-down */
979 device_unregister(current_dev);
982 if (mousevsc_drv_obj->Base.cleanup)
983 mousevsc_drv_obj->Base.cleanup(&mousevsc_drv_obj->Base);
985 vmbus_child_driver_unregister(&drv->driver);
990 static int mouse_vsc_initialize(struct hv_driver *Driver)
992 struct mousevsc_drv_obj *inputDriver =
993 (struct mousevsc_drv_obj *)Driver;
996 Driver->name = driver_name;
997 memcpy(&Driver->dev_type, &mouse_guid,
998 sizeof(struct hv_guid));
1000 /* Setup the dispatch table */
1001 inputDriver->Base.dev_add = MousevscOnDeviceAdd;
1002 inputDriver->Base.dev_rm = MousevscOnDeviceRemove;
1003 inputDriver->Base.cleanup = MousevscOnCleanup;
1009 static int __init mousevsc_init(void)
1011 struct mousevsc_drv_obj *input_drv_obj = &g_mousevsc_drv.drv_obj;
1012 struct hv_driver *drv = &g_mousevsc_drv.drv_obj.Base;
1014 DPRINT_INFO(INPUTVSC_DRV, "Hyper-V Mouse driver initializing.");
1016 /* Callback to client driver to complete the initialization */
1017 mouse_vsc_initialize(&input_drv_obj->Base);
1019 drv->driver.name = input_drv_obj->Base.name;
1020 drv->priv = input_drv_obj;
1022 drv->driver.probe = mousevsc_probe;
1023 drv->driver.remove = mousevsc_remove;
1025 /* The driver belongs to vmbus */
1026 vmbus_child_driver_register(&drv->driver);
1031 static void __exit mousevsc_exit(void)
1033 mousevsc_drv_exit();
1037 * We don't want to automatically load this driver just yet, it's quite
1038 * broken. It's safe if you want to load it yourself manually, but
1039 * don't inflict it on unsuspecting users, that's just mean.
1044 * We use a PCI table to determine if we should autoload this driver This is
1045 * needed by distro tools to determine if the hyperv drivers should be
1046 * installed and/or configured. We don't do anything else with the table, but
1047 * it needs to be present.
1049 const static struct pci_device_id microsoft_hv_pci_table[] = {
1050 { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */
1053 MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table);
1056 MODULE_LICENSE("GPL");
1057 MODULE_VERSION(HV_DRV_VERSION);
1058 module_init(mousevsc_init);
1059 module_exit(mousevsc_exit);