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