855 lines
19 KiB
C
855 lines
19 KiB
C
/*
|
|
* Copyright (c) 2009, Citrix Systems, Inc.
|
|
* Copyright (c) 2010, Microsoft Corporation.
|
|
* Copyright (c) 2011, Novell Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/device.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/input.h>
|
|
#include <linux/hid.h>
|
|
#include <linux/hiddev.h>
|
|
|
|
#include "hyperv.h"
|
|
|
|
|
|
/*
|
|
* Data types
|
|
*/
|
|
struct hv_input_dev_info {
|
|
unsigned int size;
|
|
unsigned short vendor;
|
|
unsigned short product;
|
|
unsigned short version;
|
|
unsigned short reserved[11];
|
|
};
|
|
|
|
/* The maximum size of a synthetic input message. */
|
|
#define SYNTHHID_MAX_INPUT_REPORT_SIZE 16
|
|
|
|
/*
|
|
* Current version
|
|
*
|
|
* History:
|
|
* Beta, RC < 2008/1/22 1,0
|
|
* RC > 2008/1/22 2,0
|
|
*/
|
|
#define SYNTHHID_INPUT_VERSION_MAJOR 2
|
|
#define SYNTHHID_INPUT_VERSION_MINOR 0
|
|
#define SYNTHHID_INPUT_VERSION (SYNTHHID_INPUT_VERSION_MINOR | \
|
|
(SYNTHHID_INPUT_VERSION_MAJOR << 16))
|
|
|
|
|
|
#pragma pack(push, 1)
|
|
/*
|
|
* Message types in the synthetic input protocol
|
|
*/
|
|
enum synthhid_msg_type {
|
|
SynthHidProtocolRequest,
|
|
SynthHidProtocolResponse,
|
|
SynthHidInitialDeviceInfo,
|
|
SynthHidInitialDeviceInfoAck,
|
|
SynthHidInputReport,
|
|
SynthHidMax
|
|
};
|
|
|
|
/*
|
|
* Basic message structures.
|
|
*/
|
|
struct synthhid_msg_hdr {
|
|
enum synthhid_msg_type type;
|
|
u32 size;
|
|
};
|
|
|
|
struct synthhid_msg {
|
|
struct synthhid_msg_hdr header;
|
|
char data[1]; /* Enclosed message */
|
|
};
|
|
|
|
union synthhid_version {
|
|
struct {
|
|
u16 minor_version;
|
|
u16 major_version;
|
|
};
|
|
u32 version;
|
|
};
|
|
|
|
/*
|
|
* Protocol messages
|
|
*/
|
|
struct synthhid_protocol_request {
|
|
struct synthhid_msg_hdr header;
|
|
union synthhid_version version_requested;
|
|
};
|
|
|
|
struct synthhid_protocol_response {
|
|
struct synthhid_msg_hdr header;
|
|
union synthhid_version version_requested;
|
|
unsigned char approved;
|
|
};
|
|
|
|
struct synthhid_device_info {
|
|
struct synthhid_msg_hdr header;
|
|
struct hv_input_dev_info hid_dev_info;
|
|
struct hid_descriptor hid_descriptor;
|
|
};
|
|
|
|
struct synthhid_device_info_ack {
|
|
struct synthhid_msg_hdr header;
|
|
unsigned char reserved;
|
|
};
|
|
|
|
struct synthhid_input_report {
|
|
struct synthhid_msg_hdr header;
|
|
char buffer[1];
|
|
};
|
|
|
|
#pragma pack(pop)
|
|
|
|
#define INPUTVSC_SEND_RING_BUFFER_SIZE (10*PAGE_SIZE)
|
|
#define INPUTVSC_RECV_RING_BUFFER_SIZE (10*PAGE_SIZE)
|
|
|
|
#define NBITS(x) (((x)/BITS_PER_LONG)+1)
|
|
|
|
enum pipe_prot_msg_type {
|
|
PipeMessageInvalid = 0,
|
|
PipeMessageData,
|
|
PipeMessageMaximum
|
|
};
|
|
|
|
|
|
struct pipe_prt_msg {
|
|
enum pipe_prot_msg_type type;
|
|
u32 size;
|
|
char data[1];
|
|
};
|
|
|
|
/*
|
|
* Data types
|
|
*/
|
|
struct mousevsc_prt_msg {
|
|
enum pipe_prot_msg_type type;
|
|
u32 size;
|
|
union {
|
|
struct synthhid_protocol_request request;
|
|
struct synthhid_protocol_response response;
|
|
struct synthhid_device_info_ack ack;
|
|
};
|
|
};
|
|
|
|
/*
|
|
* Represents an mousevsc device
|
|
*/
|
|
struct mousevsc_dev {
|
|
struct hv_device *device;
|
|
/* 0 indicates the device is being destroyed */
|
|
atomic_t ref_count;
|
|
int num_outstanding_req;
|
|
unsigned char init_complete;
|
|
struct mousevsc_prt_msg protocol_req;
|
|
struct mousevsc_prt_msg protocol_resp;
|
|
/* Synchronize the request/response if needed */
|
|
struct completion wait_event;
|
|
int dev_info_status;
|
|
|
|
struct hid_descriptor *hid_desc;
|
|
unsigned char *report_desc;
|
|
u32 report_desc_size;
|
|
struct hv_input_dev_info hid_dev_info;
|
|
int connected;
|
|
struct hid_device *hid_device;
|
|
};
|
|
|
|
|
|
static struct mousevsc_dev *alloc_input_device(struct hv_device *device)
|
|
{
|
|
struct mousevsc_dev *input_dev;
|
|
|
|
input_dev = kzalloc(sizeof(struct mousevsc_dev), GFP_KERNEL);
|
|
|
|
if (!input_dev)
|
|
return NULL;
|
|
|
|
/*
|
|
* Set to 2 to allow both inbound and outbound traffics
|
|
* (ie get_input_device() and must_get_input_device()) to proceed.
|
|
*/
|
|
atomic_cmpxchg(&input_dev->ref_count, 0, 2);
|
|
|
|
input_dev->device = device;
|
|
hv_set_drvdata(device, input_dev);
|
|
init_completion(&input_dev->wait_event);
|
|
|
|
return input_dev;
|
|
}
|
|
|
|
static void free_input_device(struct mousevsc_dev *device)
|
|
{
|
|
WARN_ON(atomic_read(&device->ref_count) != 0);
|
|
kfree(device);
|
|
}
|
|
|
|
/*
|
|
* Get the inputdevice object if exists and its refcount > 1
|
|
*/
|
|
static struct mousevsc_dev *get_input_device(struct hv_device *device)
|
|
{
|
|
struct mousevsc_dev *input_dev;
|
|
|
|
input_dev = hv_get_drvdata(device);
|
|
|
|
/*
|
|
* FIXME
|
|
* This sure isn't a valid thing to print for debugging, no matter
|
|
* what the intention is...
|
|
*
|
|
* printk(KERN_ERR "-------------------------> REFCOUNT = %d",
|
|
* input_dev->ref_count);
|
|
*/
|
|
|
|
if (input_dev && atomic_read(&input_dev->ref_count) > 1)
|
|
atomic_inc(&input_dev->ref_count);
|
|
else
|
|
input_dev = NULL;
|
|
|
|
return input_dev;
|
|
}
|
|
|
|
/*
|
|
* Get the inputdevice object iff exists and its refcount > 0
|
|
*/
|
|
static struct mousevsc_dev *must_get_input_device(struct hv_device *device)
|
|
{
|
|
struct mousevsc_dev *input_dev;
|
|
|
|
input_dev = hv_get_drvdata(device);
|
|
|
|
if (input_dev && atomic_read(&input_dev->ref_count))
|
|
atomic_inc(&input_dev->ref_count);
|
|
else
|
|
input_dev = NULL;
|
|
|
|
return input_dev;
|
|
}
|
|
|
|
static void put_input_device(struct hv_device *device)
|
|
{
|
|
struct mousevsc_dev *input_dev;
|
|
|
|
input_dev = hv_get_drvdata(device);
|
|
|
|
atomic_dec(&input_dev->ref_count);
|
|
}
|
|
|
|
/*
|
|
* Drop ref count to 1 to effectively disable get_input_device()
|
|
*/
|
|
static struct mousevsc_dev *release_input_device(struct hv_device *device)
|
|
{
|
|
struct mousevsc_dev *input_dev;
|
|
|
|
input_dev = hv_get_drvdata(device);
|
|
|
|
/* Busy wait until the ref drop to 2, then set it to 1 */
|
|
while (atomic_cmpxchg(&input_dev->ref_count, 2, 1) != 2)
|
|
udelay(100);
|
|
|
|
return input_dev;
|
|
}
|
|
|
|
/*
|
|
* Drop ref count to 0. No one can use input_device object.
|
|
*/
|
|
static struct mousevsc_dev *final_release_input_device(struct hv_device *device)
|
|
{
|
|
struct mousevsc_dev *input_dev;
|
|
|
|
input_dev = hv_get_drvdata(device);
|
|
|
|
/* Busy wait until the ref drop to 1, then set it to 0 */
|
|
while (atomic_cmpxchg(&input_dev->ref_count, 1, 0) != 1)
|
|
udelay(100);
|
|
|
|
hv_set_drvdata(device, NULL);
|
|
return input_dev;
|
|
}
|
|
|
|
static void mousevsc_on_send_completion(struct hv_device *device,
|
|
struct vmpacket_descriptor *packet)
|
|
{
|
|
struct mousevsc_dev *input_dev;
|
|
void *request;
|
|
|
|
input_dev = must_get_input_device(device);
|
|
if (!input_dev) {
|
|
pr_err("unable to get input device...device being destroyed?");
|
|
return;
|
|
}
|
|
|
|
request = (void *)(unsigned long)packet->trans_id;
|
|
|
|
if (request == &input_dev->protocol_req) {
|
|
/* FIXME */
|
|
/* Shouldn't we be doing something here? */
|
|
}
|
|
|
|
put_input_device(device);
|
|
}
|
|
|
|
static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device,
|
|
struct synthhid_device_info *device_info)
|
|
{
|
|
int ret = 0;
|
|
struct hid_descriptor *desc;
|
|
struct mousevsc_prt_msg ack;
|
|
|
|
/* Assume success for now */
|
|
input_device->dev_info_status = 0;
|
|
|
|
/* Save the device attr */
|
|
memcpy(&input_device->hid_dev_info, &device_info->hid_dev_info,
|
|
sizeof(struct hv_input_dev_info));
|
|
|
|
/* Save the hid desc */
|
|
desc = &device_info->hid_descriptor;
|
|
WARN_ON(desc->bLength == 0);
|
|
|
|
input_device->hid_desc = kzalloc(desc->bLength, GFP_ATOMIC);
|
|
|
|
if (!input_device->hid_desc) {
|
|
pr_err("unable to allocate hid descriptor - size %d",
|
|
desc->bLength);
|
|
goto cleanup;
|
|
}
|
|
|
|
memcpy(input_device->hid_desc, desc, desc->bLength);
|
|
|
|
/* Save the report desc */
|
|
input_device->report_desc_size = desc->desc[0].wDescriptorLength;
|
|
if (input_device->report_desc_size == 0)
|
|
goto cleanup;
|
|
input_device->report_desc = kzalloc(input_device->report_desc_size,
|
|
GFP_ATOMIC);
|
|
|
|
if (!input_device->report_desc) {
|
|
pr_err("unable to allocate report descriptor - size %d",
|
|
input_device->report_desc_size);
|
|
goto cleanup;
|
|
}
|
|
|
|
memcpy(input_device->report_desc,
|
|
((unsigned char *)desc) + desc->bLength,
|
|
desc->desc[0].wDescriptorLength);
|
|
|
|
/* Send the ack */
|
|
memset(&ack, 0, sizeof(struct mousevsc_prt_msg));
|
|
|
|
ack.type = PipeMessageData;
|
|
ack.size = sizeof(struct synthhid_device_info_ack);
|
|
|
|
ack.ack.header.type = SynthHidInitialDeviceInfoAck;
|
|
ack.ack.header.size = 1;
|
|
ack.ack.reserved = 0;
|
|
|
|
ret = vmbus_sendpacket(input_device->device->channel,
|
|
&ack,
|
|
sizeof(struct pipe_prt_msg) - sizeof(unsigned char) +
|
|
sizeof(struct synthhid_device_info_ack),
|
|
(unsigned long)&ack,
|
|
VM_PKT_DATA_INBAND,
|
|
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
|
if (ret != 0) {
|
|
pr_err("unable to send synthhid device info ack - ret %d",
|
|
ret);
|
|
goto cleanup;
|
|
}
|
|
|
|
complete(&input_device->wait_event);
|
|
|
|
return;
|
|
|
|
cleanup:
|
|
kfree(input_device->hid_desc);
|
|
input_device->hid_desc = NULL;
|
|
|
|
kfree(input_device->report_desc);
|
|
input_device->report_desc = NULL;
|
|
|
|
input_device->dev_info_status = -1;
|
|
complete(&input_device->wait_event);
|
|
}
|
|
|
|
static void mousevsc_on_receive_input_report(struct mousevsc_dev *input_device,
|
|
struct synthhid_input_report *input_report)
|
|
{
|
|
struct hv_driver *input_drv;
|
|
|
|
if (!input_device->init_complete) {
|
|
pr_info("Initialization incomplete...ignoring input_report msg");
|
|
return;
|
|
}
|
|
|
|
input_drv = drv_to_hv_drv(input_device->device->device.driver);
|
|
|
|
|
|
hid_input_report(input_device->hid_device,
|
|
HID_INPUT_REPORT, input_report->buffer, input_report->header.size, 1);
|
|
|
|
}
|
|
|
|
static void mousevsc_on_receive(struct hv_device *device,
|
|
struct vmpacket_descriptor *packet)
|
|
{
|
|
struct pipe_prt_msg *pipe_msg;
|
|
struct synthhid_msg *hid_msg;
|
|
struct mousevsc_dev *input_dev;
|
|
|
|
input_dev = must_get_input_device(device);
|
|
if (!input_dev) {
|
|
pr_err("unable to get input device...device being destroyed?");
|
|
return;
|
|
}
|
|
|
|
pipe_msg = (struct pipe_prt_msg *)((unsigned long)packet +
|
|
(packet->offset8 << 3));
|
|
|
|
if (pipe_msg->type != PipeMessageData) {
|
|
pr_err("unknown pipe msg type - type %d len %d",
|
|
pipe_msg->type, pipe_msg->size);
|
|
put_input_device(device);
|
|
return ;
|
|
}
|
|
|
|
hid_msg = (struct synthhid_msg *)&pipe_msg->data[0];
|
|
|
|
switch (hid_msg->header.type) {
|
|
case SynthHidProtocolResponse:
|
|
memcpy(&input_dev->protocol_resp, pipe_msg,
|
|
pipe_msg->size + sizeof(struct pipe_prt_msg) -
|
|
sizeof(unsigned char));
|
|
complete(&input_dev->wait_event);
|
|
break;
|
|
|
|
case SynthHidInitialDeviceInfo:
|
|
WARN_ON(pipe_msg->size < sizeof(struct hv_input_dev_info));
|
|
|
|
/*
|
|
* Parse out the device info into device attr,
|
|
* hid desc and report desc
|
|
*/
|
|
mousevsc_on_receive_device_info(input_dev,
|
|
(struct synthhid_device_info *)&pipe_msg->data[0]);
|
|
break;
|
|
case SynthHidInputReport:
|
|
mousevsc_on_receive_input_report(input_dev,
|
|
(struct synthhid_input_report *)&pipe_msg->data[0]);
|
|
|
|
break;
|
|
default:
|
|
pr_err("unsupported hid msg type - type %d len %d",
|
|
hid_msg->header.type, hid_msg->header.size);
|
|
break;
|
|
}
|
|
|
|
put_input_device(device);
|
|
}
|
|
|
|
static void mousevsc_on_channel_callback(void *context)
|
|
{
|
|
const int packetSize = 0x100;
|
|
int ret = 0;
|
|
struct hv_device *device = (struct hv_device *)context;
|
|
struct mousevsc_dev *input_dev;
|
|
|
|
u32 bytes_recvd;
|
|
u64 req_id;
|
|
unsigned char packet[0x100];
|
|
struct vmpacket_descriptor *desc;
|
|
unsigned char *buffer = packet;
|
|
int bufferlen = packetSize;
|
|
|
|
input_dev = must_get_input_device(device);
|
|
|
|
if (!input_dev) {
|
|
pr_err("unable to get input device...device being destroyed?");
|
|
return;
|
|
}
|
|
|
|
do {
|
|
ret = vmbus_recvpacket_raw(device->channel, buffer,
|
|
bufferlen, &bytes_recvd, &req_id);
|
|
|
|
if (ret == 0) {
|
|
if (bytes_recvd > 0) {
|
|
desc = (struct vmpacket_descriptor *)buffer;
|
|
|
|
switch (desc->type) {
|
|
case VM_PKT_COMP:
|
|
mousevsc_on_send_completion(
|
|
device, desc);
|
|
break;
|
|
|
|
case VM_PKT_DATA_INBAND:
|
|
mousevsc_on_receive(
|
|
device, desc);
|
|
break;
|
|
|
|
default:
|
|
pr_err("unhandled packet type %d, tid %llx len %d\n",
|
|
desc->type,
|
|
req_id,
|
|
bytes_recvd);
|
|
break;
|
|
}
|
|
|
|
/* reset */
|
|
if (bufferlen > packetSize) {
|
|
kfree(buffer);
|
|
|
|
buffer = packet;
|
|
bufferlen = packetSize;
|
|
}
|
|
} else {
|
|
/*
|
|
* pr_debug("nothing else to read...");
|
|
* reset
|
|
*/
|
|
if (bufferlen > packetSize) {
|
|
kfree(buffer);
|
|
|
|
buffer = packet;
|
|
bufferlen = packetSize;
|
|
}
|
|
break;
|
|
}
|
|
} else if (ret == -ENOBUFS) {
|
|
/* Handle large packet */
|
|
bufferlen = bytes_recvd;
|
|
buffer = kzalloc(bytes_recvd, GFP_ATOMIC);
|
|
|
|
if (buffer == NULL) {
|
|
buffer = packet;
|
|
bufferlen = packetSize;
|
|
|
|
/* Try again next time around */
|
|
pr_err("unable to allocate buffer of size %d!",
|
|
bytes_recvd);
|
|
break;
|
|
}
|
|
}
|
|
} while (1);
|
|
|
|
put_input_device(device);
|
|
|
|
return;
|
|
}
|
|
|
|
static int mousevsc_connect_to_vsp(struct hv_device *device)
|
|
{
|
|
int ret = 0;
|
|
int t;
|
|
struct mousevsc_dev *input_dev;
|
|
struct mousevsc_prt_msg *request;
|
|
struct mousevsc_prt_msg *response;
|
|
|
|
input_dev = get_input_device(device);
|
|
|
|
if (!input_dev) {
|
|
pr_err("unable to get input device...device being destroyed?");
|
|
return -1;
|
|
}
|
|
|
|
|
|
request = &input_dev->protocol_req;
|
|
|
|
/*
|
|
* Now, initiate the vsc/vsp initialization protocol on the open channel
|
|
*/
|
|
memset(request, 0, sizeof(struct mousevsc_prt_msg));
|
|
|
|
request->type = PipeMessageData;
|
|
request->size = sizeof(struct synthhid_protocol_request);
|
|
|
|
request->request.header.type = SynthHidProtocolRequest;
|
|
request->request.header.size = sizeof(unsigned int);
|
|
request->request.version_requested.version = SYNTHHID_INPUT_VERSION;
|
|
|
|
pr_info("synthhid protocol request...");
|
|
|
|
ret = vmbus_sendpacket(device->channel, request,
|
|
sizeof(struct pipe_prt_msg) -
|
|
sizeof(unsigned char) +
|
|
sizeof(struct synthhid_protocol_request),
|
|
(unsigned long)request,
|
|
VM_PKT_DATA_INBAND,
|
|
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
|
if (ret != 0) {
|
|
pr_err("unable to send synthhid protocol request.");
|
|
goto cleanup;
|
|
}
|
|
|
|
t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ);
|
|
if (t == 0) {
|
|
ret = -ETIMEDOUT;
|
|
goto cleanup;
|
|
}
|
|
|
|
response = &input_dev->protocol_resp;
|
|
|
|
if (!response->response.approved) {
|
|
pr_err("synthhid protocol request failed (version %d)",
|
|
SYNTHHID_INPUT_VERSION);
|
|
ret = -1;
|
|
goto cleanup;
|
|
}
|
|
|
|
t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ);
|
|
if (t == 0) {
|
|
ret = -ETIMEDOUT;
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* We should have gotten the device attr, hid desc and report
|
|
* desc at this point
|
|
*/
|
|
if (!input_dev->dev_info_status)
|
|
pr_info("**** input channel up and running!! ****");
|
|
else
|
|
ret = -1;
|
|
|
|
cleanup:
|
|
put_input_device(device);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mousevsc_hid_open(struct hid_device *hid)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void mousevsc_hid_close(struct hid_device *hid)
|
|
{
|
|
}
|
|
|
|
static struct hid_ll_driver mousevsc_ll_driver = {
|
|
.open = mousevsc_hid_open,
|
|
.close = mousevsc_hid_close,
|
|
};
|
|
|
|
static struct hid_driver mousevsc_hid_driver;
|
|
|
|
static void reportdesc_callback(struct hv_device *dev, void *packet, u32 len)
|
|
{
|
|
struct hid_device *hid_dev;
|
|
struct mousevsc_dev *input_device = hv_get_drvdata(dev);
|
|
|
|
hid_dev = hid_allocate_device();
|
|
if (IS_ERR(hid_dev))
|
|
return;
|
|
|
|
hid_dev->ll_driver = &mousevsc_ll_driver;
|
|
hid_dev->driver = &mousevsc_hid_driver;
|
|
|
|
if (hid_parse_report(hid_dev, packet, len))
|
|
return;
|
|
|
|
hid_dev->bus = BUS_VIRTUAL;
|
|
hid_dev->vendor = input_device->hid_dev_info.vendor;
|
|
hid_dev->product = input_device->hid_dev_info.product;
|
|
hid_dev->version = input_device->hid_dev_info.version;
|
|
|
|
sprintf(hid_dev->name, "%s", "Microsoft Vmbus HID-compliant Mouse");
|
|
|
|
if (!hidinput_connect(hid_dev, 0)) {
|
|
hid_dev->claimed |= HID_CLAIMED_INPUT;
|
|
|
|
input_device->connected = 1;
|
|
|
|
}
|
|
|
|
input_device->hid_device = hid_dev;
|
|
}
|
|
|
|
static int mousevsc_on_device_add(struct hv_device *device,
|
|
void *additional_info)
|
|
{
|
|
int ret = 0;
|
|
struct mousevsc_dev *input_dev;
|
|
struct hv_driver *input_drv;
|
|
|
|
input_dev = alloc_input_device(device);
|
|
|
|
if (!input_dev) {
|
|
ret = -1;
|
|
goto cleanup;
|
|
}
|
|
|
|
input_dev->init_complete = false;
|
|
|
|
/* Open the channel */
|
|
ret = vmbus_open(device->channel,
|
|
INPUTVSC_SEND_RING_BUFFER_SIZE,
|
|
INPUTVSC_RECV_RING_BUFFER_SIZE,
|
|
NULL,
|
|
0,
|
|
mousevsc_on_channel_callback,
|
|
device
|
|
);
|
|
|
|
if (ret != 0) {
|
|
pr_err("unable to open channel: %d", ret);
|
|
free_input_device(input_dev);
|
|
return -1;
|
|
}
|
|
|
|
pr_info("InputVsc channel open: %d", ret);
|
|
|
|
ret = mousevsc_connect_to_vsp(device);
|
|
|
|
if (ret != 0) {
|
|
pr_err("unable to connect channel: %d", ret);
|
|
|
|
vmbus_close(device->channel);
|
|
free_input_device(input_dev);
|
|
return ret;
|
|
}
|
|
|
|
input_drv = drv_to_hv_drv(input_dev->device->device.driver);
|
|
|
|
|
|
|
|
/* Send the report desc back up */
|
|
/* workaround SA-167 */
|
|
if (input_dev->report_desc[14] == 0x25)
|
|
input_dev->report_desc[14] = 0x29;
|
|
|
|
reportdesc_callback(device, input_dev->report_desc,
|
|
input_dev->report_desc_size);
|
|
|
|
input_dev->init_complete = true;
|
|
|
|
cleanup:
|
|
return ret;
|
|
}
|
|
|
|
static int mousevsc_on_device_remove(struct hv_device *device)
|
|
{
|
|
struct mousevsc_dev *input_dev;
|
|
int ret = 0;
|
|
|
|
pr_info("disabling input device (%p)...",
|
|
hv_get_drvdata(device));
|
|
|
|
input_dev = release_input_device(device);
|
|
|
|
|
|
/*
|
|
* At this point, all outbound traffic should be disable. We only
|
|
* allow inbound traffic (responses) to proceed
|
|
*
|
|
* so that outstanding requests can be completed.
|
|
*/
|
|
while (input_dev->num_outstanding_req) {
|
|
pr_info("waiting for %d requests to complete...",
|
|
input_dev->num_outstanding_req);
|
|
|
|
udelay(100);
|
|
}
|
|
|
|
pr_info("removing input device (%p)...", hv_get_drvdata(device));
|
|
|
|
input_dev = final_release_input_device(device);
|
|
|
|
pr_info("input device (%p) safe to remove", input_dev);
|
|
|
|
/* Close the channel */
|
|
vmbus_close(device->channel);
|
|
|
|
free_input_device(input_dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int mousevsc_probe(struct hv_device *dev,
|
|
const struct hv_vmbus_device_id *dev_id)
|
|
{
|
|
int ret = 0;
|
|
|
|
|
|
/* Call to the vsc driver to add the device */
|
|
ret = mousevsc_on_device_add(dev, NULL);
|
|
|
|
if (ret != 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mousevsc_remove(struct hv_device *dev)
|
|
{
|
|
struct mousevsc_dev *input_dev = hv_get_drvdata(dev);
|
|
|
|
if (input_dev->connected) {
|
|
hidinput_disconnect(input_dev->hid_device);
|
|
input_dev->connected = 0;
|
|
hid_destroy_device(input_dev->hid_device);
|
|
}
|
|
|
|
/*
|
|
* Call to the vsc driver to let it know that the device
|
|
* is being removed
|
|
*/
|
|
return mousevsc_on_device_remove(dev);
|
|
}
|
|
|
|
static const struct hv_vmbus_device_id id_table[] = {
|
|
/* Mouse guid */
|
|
{ VMBUS_DEVICE(0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c,
|
|
0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A) },
|
|
{ },
|
|
};
|
|
|
|
/*
|
|
* The mouse driver is not functional; do not auto-load it.
|
|
*/
|
|
/* MODULE_DEVICE_TABLE(vmbus, id_table); */
|
|
|
|
static struct hv_driver mousevsc_drv = {
|
|
.name = "mousevsc",
|
|
.id_table = id_table,
|
|
.probe = mousevsc_probe,
|
|
.remove = mousevsc_remove,
|
|
};
|
|
|
|
static int __init mousevsc_init(void)
|
|
{
|
|
return vmbus_driver_register(&mousevsc_drv);
|
|
}
|
|
|
|
static void __exit mousevsc_exit(void)
|
|
{
|
|
vmbus_driver_unregister(&mousevsc_drv);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(HV_DRV_VERSION);
|
|
module_init(mousevsc_init);
|
|
module_exit(mousevsc_exit);
|
|
|