97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
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/*
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* Copyright (c) 2006-2021, 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_CONSOLE_H__
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#define __VIRTIO_CONSOLE_H__
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#include <rtdef.h>
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#include <virtio.h>
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#ifndef RT_USING_VIRTIO_CONSOLE_PORT_MAX_NR
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#define RT_USING_VIRTIO_CONSOLE_PORT_MAX_NR 4
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#endif
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#define VIRTIO_CONSOLE_QUEUE_DATA_RX 0
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#define VIRTIO_CONSOLE_QUEUE_DATA_TX 1
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#define VIRTIO_CONSOLE_QUEUE_CTRL_RX 2
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#define VIRTIO_CONSOLE_QUEUE_CTRL_TX 3
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#define VIRTIO_CONSOLE_QUEUE_SIZE 64
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/* Every port has data rx & tx, and port0 has ctrl rx & tx in multiport */
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#define VIRTIO_CONSOLE_PORT_QUEUE_INDEX(id, queue) ((id) * 2 + (!!(id)) * 2 + (queue))
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#define VIRTIO_CONSOLE_PORT_BAD_ID (~(rt_uint32_t)0)
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#define VIRTIO_CONSOLE_F_SIZE 0 /* Does host provide console size? */
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#define VIRTIO_CONSOLE_F_MULTIPORT 1 /* Does host provide multiple ports? */
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#define VIRTIO_CONSOLE_F_EMERG_WRITE 2 /* Does host support emergency write? */
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struct virtio_console_config
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{
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rt_uint16_t cols;
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rt_uint16_t rows;
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rt_uint32_t max_nr_ports;
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rt_uint32_t emerg_wr;
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} __attribute__((packed));
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struct virtio_console_control
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{
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rt_uint32_t id; /* Port number */
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rt_uint16_t event; /* The kind of control event */
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rt_uint16_t value; /* Extra information for the event */
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};
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enum virtio_console_control_event
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{
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VIRTIO_CONSOLE_DEVICE_READY = 0,
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VIRTIO_CONSOLE_PORT_ADD,
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VIRTIO_CONSOLE_PORT_REMOVE,
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VIRTIO_CONSOLE_PORT_READY,
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VIRTIO_CONSOLE_CONSOLE_PORT,
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VIRTIO_CONSOLE_RESIZE,
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VIRTIO_CONSOLE_PORT_OPEN,
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VIRTIO_CONSOLE_PORT_NAME,
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};
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struct virtio_console_resize
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{
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rt_uint16_t cols;
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rt_uint16_t rows;
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};
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struct virtio_console_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_uint32_t console_id;
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rt_size_t port_nr;
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rt_size_t max_port_nr;
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rt_list_t port_head;
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struct virtio_console_config *config;
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struct
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{
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struct virtio_console_control rx_ctrl, tx_ctrl;
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} info[VIRTIO_CONSOLE_QUEUE_SIZE];
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};
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rt_err_t rt_virtio_console_init(rt_ubase_t *mmio_base, rt_uint32_t irq);
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enum
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{
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VIRTIO_DEVICE_CTRL_CONSOLE_PORT_CREATE = 0x20,
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VIRTIO_DEVICE_CTRL_CONSOLE_PORT_DESTROY,
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};
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#endif /* __VIRTIO_CONSOLE_H__ */
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