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/*
* Based on virtio-input.h of QEMU project
*
* Copyright (c) 2022 Virtual Open Systems SAS.
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* (at your option) any later version. See the COPYING file in the
* top-level directory.
*/
#ifndef VHOST_USER_INPUT
#define VHOST_USER_INPUT
#include "vhost_loopback.h"
#include "vhost_user_loopback.h"
#include "virtio_loopback.h"
#include <linux/virtio_input.h>
#include "queue.h"
#include <sys/mman.h>
/* ----------------------------------------------------------------- */
/* virtio input protocol */
typedef struct virtio_input_absinfo virtio_input_absinfo;
typedef struct virtio_input_config virtio_input_config;
typedef struct virtio_input_event virtio_input_event;
/* ----------------------------------------------------------------- */
/* qemu internals */
#define TYPE_VIRTIO_INPUT "virtio-input-device"
#define TYPE_VIRTIO_INPUT_HID "virtio-input-hid-device"
#define TYPE_VIRTIO_KEYBOARD "virtio-keyboard-device"
#define TYPE_VIRTIO_MOUSE "virtio-mouse-device"
#define TYPE_VIRTIO_TABLET "virtio-tablet-device"
#define TYPE_VIRTIO_INPUT_HOST "virtio-input-host-device"
#define TYPE_VHOST_USER_INPUT "vhost-user-input"
typedef struct VirtIOInputConfig {
virtio_input_config config;
QTAILQ_ENTRY(VirtIOInputConfig) node;
} VirtIOInputConfig;
struct VirtIOInputClass;
typedef struct VirtIOInput {
VirtIODevice *parent_dev;
struct VirtIOInputClass *input_class;
uint8_t cfg_select;
uint8_t cfg_subsel;
uint32_t cfg_size;
QTAILQ_HEAD(, VirtIOInputConfig) cfg_list;
VirtQueue *evt, *sts;
char *serial;
struct {
virtio_input_event event;
VirtQueueElement *elem;
} *queue;
uint32_t qindex, qsize;
bool active;
} VirtIOInput;
typedef struct VirtIOInputClass {
VirtioDeviceClass *parent_class;
void (*realize)();
void (*unrealize)(VirtIODevice *dev);
void (*change_active)(VirtIOInput *vinput);
void (*handle_status)(VirtIOInput *vinput, virtio_input_event *event);
} VirtIOInputClass;
struct VirtIOInputHID {
VirtIOInput parent_obj;
char *display;
uint32_t head;
int ledstate;
bool wheel_axis;
};
struct VirtIOInputHost {
VirtIOInput parent_obj;
char *evdev;
int fd;
};
typedef struct VhostUserInput {
VirtIOInput *vdev_input;
struct vhost_dev *vhost_dev;
VirtIODevice *vdev;
bool started;
bool completed;
} VhostUserInput;
#define VIRTIO_ID_NAME_KEYBOARD "QEMU Virtio Keyboard"
#define BUS_VIRTUAL 0x06
/*
* Event types
*/
#define EV_SYN 0x00
#define EV_KEY 0x01
#define EV_REL 0x02
#define EV_ABS 0x03
#define EV_MSC 0x04
#define EV_SW 0x05
#define EV_LED 0x11
#define EV_SND 0x12
#define EV_REP 0x14
#define EV_FF 0x15
#define EV_PWR 0x16
#define EV_FF_STATUS 0x17
#define EV_MAX 0x1f
#define EV_CNT (EV_MAX + 1)
/*
* LEDs
*/
#define LED_NUML 0x00
#define LED_CAPSL 0x01
#define LED_SCROLLL 0x02
#define LED_COMPOSE 0x03
#define LED_KANA 0x04
#define LED_SLEEP 0x05
#define LED_SUSPEND 0x06
#define LED_MUTE 0x07
#define LED_MISC 0x08
#define LED_MAIL 0x09
#define LED_CHARGING 0x0a
#define LED_MAX 0x0f
#define LED_CNT (LED_MAX + 1)
/*
* Keys and buttons
*
* Most of the keys/buttons are modeled after USB HUT 1.12
* (see http://www.usb.org/developers/hidpage).
* Abbreviations in the comments:
* AC - Application Control
* AL - Application Launch Button
* SC - System Control
*/
#define KEY_G 34
static struct virtio_input_config virtio_keyboard_config[] = {
{
.select = VIRTIO_INPUT_CFG_ID_NAME,
.size = sizeof(VIRTIO_ID_NAME_KEYBOARD),
.u.string = VIRTIO_ID_NAME_KEYBOARD,
},{
.select = VIRTIO_INPUT_CFG_ID_DEVIDS,
.size = sizeof(struct virtio_input_devids),
.u.ids = {
.bustype = (BUS_VIRTUAL),
.vendor = (0x0627), /* same we use for usb hid devices */
.product = (0x0001),
.version = (0x0001),
},
},{
.select = VIRTIO_INPUT_CFG_EV_BITS,
.subsel = EV_KEY,
.size = 1,
.u.bitmap = {
KEY_G,
},
},
{}, /* End of list */
};
void vhost_user_backend_start(VirtIODevice *vdev);
void vhost_user_backend_stop(VirtIODevice *vdev);
void virtio_input_init_config(VirtIOInput *vinput,
virtio_input_config *config);
void virtio_input_class_init(VirtIODevice *vdev);
void virtio_input_device_realize();
void vhost_user_input_init(VirtIODevice *vdev);
void vhost_user_input_realize();
#endif /* VHOST_USER_INPUT */
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