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virtio-input: core code & base class [device]

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This patch adds virtio-input support to qemu.  It brings a abstract
base class providing core support, other classes can build on it to
actually implement input devices.

virtio-input basically sends linux input layer events (evdev) over
virtio.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2014-03-14 14:39:20 +01:00
parent 2fe7c31832
commit f73ddbad39
4 changed files with 371 additions and 0 deletions
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84
include/hw/virtio/virtio-input.h Normal file
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#ifndef _QEMU_VIRTIO_INPUT_H
#define _QEMU_VIRTIO_INPUT_H
#include "ui/input.h"
/* ----------------------------------------------------------------- */
/* virtio input protocol */
#include "standard-headers/linux/virtio_ids.h"
#include "standard-headers/linux/virtio_input.h"
typedef struct virtio_input_absinfo virtio_input_absinfo;
typedef struct virtio_input_config virtio_input_config;
typedef struct virtio_input_event virtio_input_event;
#if defined(HOST_WORDS_BIGENDIAN)
# define const_le32(_x) bswap32(_x)
# define const_le16(_x) bswap32(_x)
#else
# define const_le32(_x) (_x)
# define const_le16(_x) (_x)
#endif
/* ----------------------------------------------------------------- */
/* qemu internals */
#define TYPE_VIRTIO_INPUT "virtio-input-device"
#define VIRTIO_INPUT(obj) \
OBJECT_CHECK(VirtIOInput, (obj), TYPE_VIRTIO_INPUT)
#define VIRTIO_INPUT_GET_PARENT_CLASS(obj) \
OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_INPUT)
#define VIRTIO_INPUT_GET_CLASS(obj) \
OBJECT_GET_CLASS(VirtIOInputClass, obj, TYPE_VIRTIO_INPUT)
#define VIRTIO_INPUT_CLASS(klass) \
OBJECT_CLASS_CHECK(VirtIOInputClass, klass, TYPE_VIRTIO_INPUT)
typedef struct VirtIOInput VirtIOInput;
typedef struct VirtIOInputClass VirtIOInputClass;
typedef struct VirtIOInputConfig VirtIOInputConfig;
struct virtio_input_conf {
char *serial;
};
struct VirtIOInputConfig {
virtio_input_config config;
QTAILQ_ENTRY(VirtIOInputConfig) node;
};
struct VirtIOInput {
VirtIODevice parent_obj;
uint8_t cfg_select;
uint8_t cfg_subsel;
uint32_t cfg_size;
QTAILQ_HEAD(, VirtIOInputConfig) cfg_list;
VirtQueue *evt, *sts;
virtio_input_conf input;
virtio_input_event *queue;
uint32_t qindex, qsize;
bool active;
};
struct VirtIOInputClass {
/*< private >*/
VirtioDeviceClass parent;
/*< public >*/
DeviceRealize realize;
DeviceUnrealize unrealize;
void (*change_active)(VirtIOInput *vinput);
void (*handle_status)(VirtIOInput *vinput, virtio_input_event *event);
};
void virtio_input_send(VirtIOInput *vinput, virtio_input_event *event);
void virtio_input_init_config(VirtIOInput *vinput,
virtio_input_config *config);
void virtio_input_add_config(VirtIOInput *vinput,
virtio_input_config *config);
void virtio_input_idstr_config(VirtIOInput *vinput,
uint8_t select, const char *string);
#endif /* _QEMU_VIRTIO_INPUT_H */