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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-11-11 GuEe-GUI the first version
*/
#ifndef __VIRTIO_INPUT_H__
#define __VIRTIO_INPUT_H__
#include <rtdef.h>
#include <virtio.h>
#include <virtio_input_event_codes.h>
#define VIRTIO_INPUT_QUEUE_EVENT 0
#define VIRTIO_INPUT_QUEUE_STATUS 1
#define VIRTIO_INPUT_EVENT_QUEUE_SIZE 64
#define VIRTIO_INPUT_STATUS_QUEUE_SIZE 8
#define VIRTIO_INPUT_QUEUE_MAX_SIZE (VIRTIO_INPUT_EVENT_QUEUE_SIZE > VIRTIO_INPUT_STATUS_QUEUE_SIZE ? \
VIRTIO_INPUT_EVENT_QUEUE_SIZE : VIRTIO_INPUT_STATUS_QUEUE_SIZE)
#define VIRTIO_INPUT_ABS_AXIS_X 0
#define VIRTIO_INPUT_ABS_AXIS_Y 1
enum virtio_input_type
{
VIRTIO_INPUT_TYPE_KEYBOARD,
VIRTIO_INPUT_TYPE_MOUSE,
VIRTIO_INPUT_TYPE_TABLET,
VIRTIO_INPUT_TYPE_SIZE,
};
enum virtio_input_config_select
{
VIRTIO_INPUT_CFG_UNSET = 0x00,
VIRTIO_INPUT_CFG_ID_NAME = 0x01,
VIRTIO_INPUT_CFG_ID_SERIAL = 0x02,
VIRTIO_INPUT_CFG_ID_DEVIDS = 0x03,
VIRTIO_INPUT_CFG_PROP_BITS = 0x10,
VIRTIO_INPUT_CFG_EV_BITS = 0x11,
VIRTIO_INPUT_CFG_ABS_INFO = 0x12,
};
struct virtio_input_absinfo
{
rt_uint32_t min; /* Minimum value for the axis */
rt_uint32_t max; /* Maximum value for the axis */
rt_uint32_t fuzz; /* Fuzz value that is used to filter noise from the event stream */
rt_uint32_t flat; /* Within this value will be discarded by joydev interface and reported as 0 instead */
rt_uint32_t res; /* Resolution for the values reported for the axis */
};
struct virtio_input_devids
{
rt_uint16_t bustype;
rt_uint16_t vendor;
rt_uint16_t product;
rt_uint16_t version;
};
struct virtio_input_config
{
rt_uint8_t select;
rt_uint8_t subsel;
rt_uint8_t size;
rt_uint8_t reserved[5];
union
{
char string[128];
rt_uint8_t bitmap[128];
struct virtio_input_absinfo abs;
struct virtio_input_devids ids;
};
} __attribute__((packed));
struct virtio_input_event
{
rt_uint16_t type;
rt_uint16_t code;
rt_uint32_t value;
};
#ifdef ARCH_CPU_64BIT
#define BITS_PER_LONG 64
#else
#define BITS_PER_LONG 32
#endif
#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG))
#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
#define BITS_PER_BYTE 8
#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
#define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(char))
#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(long))
struct virtio_input_device
{
struct rt_device parent;
struct virtio_device virtio_dev;
rt_ubase_t ev_bit[BITS_TO_LONGS(EV_CNT)];
rt_ubase_t key_bit[BITS_TO_LONGS(KEY_CNT)];
rt_ubase_t rel_bit[BITS_TO_LONGS(REL_CNT)];
rt_ubase_t abs_bit[BITS_TO_LONGS(ABS_CNT)];
enum virtio_input_type type;
struct virtio_input_config *config;
/* Broadcast events */
struct rt_mutex rw_mutex;
void (*bsct_handler)(struct virtio_input_event event);
struct virtio_input_event bcst_events[VIRTIO_INPUT_EVENT_QUEUE_SIZE];
/* Receive events */
struct virtio_input_event recv_events[VIRTIO_INPUT_EVENT_QUEUE_SIZE];
/* Transmit status */
struct virtio_input_event xmit_events[VIRTIO_INPUT_STATUS_QUEUE_SIZE];
};
enum
{
VIRTIO_DEVICE_CTRL_INPUT_GET_TYPE = 0x20,
VIRTIO_DEVICE_CTRL_INPUT_BIND_BSCT_HANDLER,
VIRTIO_DEVICE_CTRL_INPUT_GET_ABS_X_INFO,
VIRTIO_DEVICE_CTRL_INPUT_GET_ABS_Y_INFO,
VIRTIO_DEVICE_CTRL_INPUT_SET_STATUS,
VIRTIO_DEVICE_CTRL_INPUT_GET_EV_BIT,
VIRTIO_DEVICE_CTRL_INPUT_GET_KEY_BIT,
VIRTIO_DEVICE_CTRL_INPUT_GET_REL_BIT,
VIRTIO_DEVICE_CTRL_INPUT_GET_ABS_BIT,
};
rt_err_t rt_virtio_input_init(rt_ubase_t *mmio_base, rt_uint32_t irq);
#endif /* __VIRTIO_INPUT_H__ */
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