450 lines
13 KiB
C
450 lines
13 KiB
C
/*
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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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#include <rthw.h>
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#include <rtthread.h>
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#include <cpuport.h>
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#ifdef RT_USING_VIRTIO_INPUT
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#include <virtio_input.h>
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static void _set_bit(rt_uint32_t nr, volatile rt_ubase_t *addr)
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{
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rt_ubase_t mask = BIT_MASK(nr);
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rt_ubase_t *p = ((rt_ubase_t *)addr) + BIT_WORD(nr);
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*p |= mask;
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}
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static rt_ssize_t virtio_input_cfg_select(struct virtio_input_device *virtio_input_dev,
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rt_uint8_t select, rt_uint8_t subsel)
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{
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struct virtio_input_config *config = virtio_input_dev->config;
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rt_hw_dsb();
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config->select = select;
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config->subsel = subsel;
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rt_hw_dsb();
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return config->size;
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}
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static void virtio_input_cfg_bits(struct virtio_input_device *virtio_input_dev,
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rt_uint8_t select, rt_uint8_t subsel, rt_ubase_t *bits, rt_uint32_t bitcount)
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{
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int i;
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rt_uint32_t bit;
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rt_uint8_t bytes;
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rt_uint8_t *virtio_bits;
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void *config_base = virtio_input_dev->config;
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rt_off_t offset = (rt_size_t)&((struct virtio_input_config *)0)->bitmap;
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bytes = virtio_input_cfg_select(virtio_input_dev, select, subsel);
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if (bytes == 0)
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{
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return;
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}
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if (bitcount > bytes * 8)
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{
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bitcount = bytes * 8;
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}
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/*
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* Bitmap in virtio config space is a simple stream of bytes,
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* with the first byte carrying bits 0-7, second bits 8-15 and
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* so on.
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*/
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virtio_bits = rt_malloc(bytes);
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if (virtio_bits == RT_NULL)
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{
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return;
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}
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for (i = 0; i < bytes; ++i)
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{
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void *buffer = (void *)virtio_bits + i;
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if (virtio_input_dev->virtio_dev.mmio_config->version == 1)
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{
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HWREG8(config_base + offset + i) = *((rt_uint8_t *)buffer);
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}
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else
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{
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rt_memcpy(config_base + offset + i, buffer, sizeof(rt_uint8_t));
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}
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}
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for (bit = 0; bit < bitcount; ++bit)
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{
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if (virtio_bits[bit / 8] & (1 << (bit % 8)))
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{
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_set_bit(bit, bits);
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}
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}
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rt_free(virtio_bits);
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if (select == VIRTIO_INPUT_CFG_EV_BITS)
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{
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_set_bit(subsel, virtio_input_dev->ev_bit);
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}
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}
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static rt_err_t virtio_input_init(rt_device_t dev)
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{
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int i;
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rt_uint16_t idx[VIRTIO_INPUT_QUEUE_MAX_SIZE];
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struct virtio_input_device *virtio_input_dev = (struct virtio_input_device *)dev;
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struct virtio_device *virtio_dev = &virtio_input_dev->virtio_dev;
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struct virtq *queue_event, *queue_status;
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virtio_input_cfg_bits(virtio_input_dev, VIRTIO_INPUT_CFG_EV_BITS, EV_KEY, virtio_input_dev->key_bit, KEY_CNT);
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virtio_input_cfg_bits(virtio_input_dev, VIRTIO_INPUT_CFG_EV_BITS, EV_REL, virtio_input_dev->rel_bit, REL_CNT);
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virtio_input_cfg_bits(virtio_input_dev, VIRTIO_INPUT_CFG_EV_BITS, EV_ABS, virtio_input_dev->abs_bit, ABS_CNT);
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queue_event = &virtio_dev->queues[VIRTIO_INPUT_QUEUE_EVENT];
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queue_status = &virtio_dev->queues[VIRTIO_INPUT_QUEUE_STATUS];
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virtio_alloc_desc_chain(virtio_dev, VIRTIO_INPUT_QUEUE_EVENT, queue_event->num, idx);
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virtio_alloc_desc_chain(virtio_dev, VIRTIO_INPUT_QUEUE_STATUS, queue_status->num, idx);
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for (i = 0; i < queue_event->num; ++i)
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{
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rt_uint16_t id = i;
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void *addr = &virtio_input_dev->recv_events[i];
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virtio_fill_desc(virtio_dev, VIRTIO_INPUT_QUEUE_EVENT, id,
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VIRTIO_VA2PA(addr), sizeof(struct virtio_input_event), VIRTQ_DESC_F_WRITE, 0);
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virtio_submit_chain(virtio_dev, VIRTIO_INPUT_QUEUE_EVENT, id);
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}
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rt_hw_dsb();
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queue_event->avail->flags = 0;
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queue_status->avail->flags = VIRTQ_AVAIL_F_NO_INTERRUPT;
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virtio_queue_notify(virtio_dev, VIRTIO_INPUT_QUEUE_EVENT);
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return RT_EOK;
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}
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static rt_ssize_t virtio_input_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
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{
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struct virtio_input_device *virtio_input_dev = (struct virtio_input_device *)dev;
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if (buffer == RT_NULL || pos + size >= virtio_input_dev->virtio_dev.queues[VIRTIO_INPUT_QUEUE_EVENT].num)
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{
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return 0;
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}
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rt_mutex_take(&virtio_input_dev->rw_mutex, RT_WAITING_FOREVER);
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rt_memcpy(buffer, &virtio_input_dev->bcst_events[pos], size);
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rt_mutex_release(&virtio_input_dev->rw_mutex);
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return size;
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}
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static rt_ssize_t virtio_input_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
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{
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struct virtio_input_device *virtio_input_dev = (struct virtio_input_device *)dev;
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if (buffer == RT_NULL || pos + size >= virtio_input_dev->virtio_dev.queues[VIRTIO_INPUT_QUEUE_EVENT].num)
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{
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return 0;
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}
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rt_mutex_take(&virtio_input_dev->rw_mutex, RT_WAITING_FOREVER);
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rt_memcpy(&virtio_input_dev->bcst_events[pos], buffer, size);
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rt_mutex_release(&virtio_input_dev->rw_mutex);
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return size;
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}
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static rt_err_t virtio_input_control(rt_device_t dev, int cmd, void *args)
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{
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rt_err_t status = RT_EOK;
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struct virtio_input_device *virtio_input_dev = (struct virtio_input_device *)dev;
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struct virtio_device *virtio_dev = &virtio_input_dev->virtio_dev;
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struct virtio_input_config *config = virtio_input_dev->config;
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if (args == RT_NULL)
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{
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return -RT_ERROR;
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}
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switch (cmd)
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{
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case VIRTIO_DEVICE_CTRL_INPUT_GET_TYPE:
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*(enum virtio_input_type *)args = virtio_input_dev->type;
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break;
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case VIRTIO_DEVICE_CTRL_INPUT_BIND_BSCT_HANDLER:
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virtio_input_dev->bsct_handler = args;
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break;
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case VIRTIO_DEVICE_CTRL_INPUT_GET_ABS_X_INFO:
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virtio_input_cfg_select(virtio_input_dev, VIRTIO_INPUT_CFG_ABS_INFO, VIRTIO_INPUT_ABS_AXIS_X);
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rt_memcpy(args, config, sizeof(struct virtio_input_config));
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break;
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case VIRTIO_DEVICE_CTRL_INPUT_GET_ABS_Y_INFO:
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virtio_input_cfg_select(virtio_input_dev, VIRTIO_INPUT_CFG_ABS_INFO, VIRTIO_INPUT_ABS_AXIS_Y);
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rt_memcpy(args, config, sizeof(struct virtio_input_config));
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break;
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case VIRTIO_DEVICE_CTRL_INPUT_SET_STATUS:
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{
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rt_uint16_t id;
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void *addr;
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struct virtq *queue_status = &virtio_dev->queues[VIRTIO_INPUT_QUEUE_STATUS];
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#ifdef RT_USING_SMP
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rt_base_t level = rt_spin_lock_irqsave(&virtio_dev->spinlock);
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#endif
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id = queue_status->avail->idx % queue_status->num;
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addr = &virtio_input_dev->xmit_events[id];
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rt_memcpy(addr, args, sizeof(struct virtio_input_event));
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virtio_free_desc(virtio_dev, VIRTIO_INPUT_QUEUE_STATUS, id);
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virtio_fill_desc(virtio_dev, VIRTIO_INPUT_QUEUE_STATUS, id,
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VIRTIO_VA2PA(addr), sizeof(struct virtio_input_event), 0, 0);
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virtio_submit_chain(virtio_dev, VIRTIO_INPUT_QUEUE_STATUS, id);
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virtio_queue_notify(virtio_dev, VIRTIO_INPUT_QUEUE_STATUS);
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virtio_alloc_desc(virtio_dev, VIRTIO_INPUT_QUEUE_STATUS);
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#ifdef RT_USING_SMP
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rt_spin_unlock_irqrestore(&virtio_dev->spinlock, level);
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#endif
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}
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break;
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case VIRTIO_DEVICE_CTRL_INPUT_GET_EV_BIT:
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rt_memcpy(args, virtio_input_dev->ev_bit, sizeof(virtio_input_dev->ev_bit));
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break;
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case VIRTIO_DEVICE_CTRL_INPUT_GET_KEY_BIT:
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rt_memcpy(args, virtio_input_dev->key_bit, sizeof(virtio_input_dev->key_bit));
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break;
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case VIRTIO_DEVICE_CTRL_INPUT_GET_REL_BIT:
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rt_memcpy(args, virtio_input_dev->rel_bit, sizeof(virtio_input_dev->rel_bit));
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break;
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case VIRTIO_DEVICE_CTRL_INPUT_GET_ABS_BIT:
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rt_memcpy(args, virtio_input_dev->abs_bit, sizeof(virtio_input_dev->abs_bit));
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break;
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default:
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status = -RT_EINVAL;
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break;
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}
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return status;
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}
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#ifdef RT_USING_DEVICE_OPS
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const static struct rt_device_ops virtio_input_ops =
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{
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virtio_input_init,
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RT_NULL,
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RT_NULL,
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virtio_input_read,
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virtio_input_write,
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virtio_input_control
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};
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#endif
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static void virtio_input_isr(int irqno, void *param)
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{
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struct virtio_input_device *virtio_input_dev = (struct virtio_input_device *)param;
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struct virtio_device *virtio_dev = &virtio_input_dev->virtio_dev;
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struct virtq *event_queue = &virtio_dev->queues[VIRTIO_INPUT_QUEUE_EVENT];
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const char *dev_name = virtio_input_dev->parent.parent.name;
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#ifdef RT_USING_SMP
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rt_base_t level = rt_spin_lock_irqsave(&virtio_dev->spinlock);
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#endif
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virtio_interrupt_ack(virtio_dev);
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rt_hw_dsb();
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while (event_queue->used_idx != event_queue->used->idx)
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{
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rt_uint16_t id = event_queue->used->ring[event_queue->used_idx % event_queue->num].id;
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rt_uint32_t len = event_queue->used->ring[event_queue->used_idx % event_queue->num].len;
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if (len == sizeof(struct virtio_input_event))
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{
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struct virtio_input_event *recv_events = &virtio_input_dev->recv_events[id];
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struct virtio_input_event *bcst_events = &virtio_input_dev->bcst_events[id];
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if (recv_events->type >= EV_SYN && recv_events->type <= EV_ABS)
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{
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bcst_events->type = recv_events->type;
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bcst_events->code = recv_events->code;
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bcst_events->value = recv_events->value;
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if (virtio_input_dev->bsct_handler != RT_NULL)
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{
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virtio_input_dev->bsct_handler(*bcst_events);
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}
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}
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else
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{
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rt_kprintf("%s: Unsupport event[type: %02x, code: %02x, value: %08x]!\n",
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dev_name, recv_events->type, recv_events->code, recv_events->value);
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}
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}
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else
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{
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rt_kprintf("%s: Invalid event!\n", dev_name);
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}
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event_queue->used_idx++;
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virtio_submit_chain(virtio_dev, VIRTIO_INPUT_QUEUE_EVENT, id);
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virtio_queue_notify(virtio_dev, VIRTIO_INPUT_QUEUE_EVENT);
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}
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#ifdef RT_USING_SMP
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rt_spin_unlock_irqrestore(&virtio_dev->spinlock, level);
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#endif
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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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{
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rt_uint32_t flag;
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static int dev_no = 0;
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char dev_name[RT_NAME_MAX];
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struct virtio_device *virtio_dev;
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struct virtio_input_device *virtio_input_dev;
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virtio_input_dev = rt_malloc(sizeof(struct virtio_input_device));
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if (virtio_input_dev == RT_NULL)
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{
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goto _alloc_fail;
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}
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virtio_dev = &virtio_input_dev->virtio_dev;
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virtio_dev->irq = irq;
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virtio_dev->mmio_base = mmio_base;
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virtio_input_dev->config = (struct virtio_input_config *)virtio_dev->mmio_config->config;
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virtio_input_dev->bsct_handler = RT_NULL;
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#ifdef RT_USING_SMP
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rt_spin_lock_init(&virtio_dev->spinlock);
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#endif
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virtio_reset_device(virtio_dev);
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virtio_status_acknowledge_driver(virtio_dev);
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virtio_dev->mmio_config->driver_features = virtio_dev->mmio_config->device_features & ~(
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(1 << VIRTIO_F_RING_EVENT_IDX) |
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(1 << VIRTIO_F_RING_INDIRECT_DESC));
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virtio_status_driver_ok(virtio_dev);
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if (virtio_queues_alloc(virtio_dev, 2) != RT_EOK)
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{
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goto _alloc_fail;
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}
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if (virtio_queue_init(virtio_dev, VIRTIO_INPUT_QUEUE_EVENT, VIRTIO_INPUT_EVENT_QUEUE_SIZE) != RT_EOK)
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{
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goto _alloc_fail;
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}
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if (virtio_queue_init(virtio_dev, VIRTIO_INPUT_QUEUE_STATUS, VIRTIO_INPUT_STATUS_QUEUE_SIZE) != RT_EOK)
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{
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virtio_queue_destroy(virtio_dev, VIRTIO_INPUT_QUEUE_EVENT);
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goto _alloc_fail;
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}
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virtio_input_cfg_select(virtio_input_dev, VIRTIO_INPUT_CFG_ID_DEVIDS, 0);
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if (virtio_input_dev->config->ids.product == EV_ABS)
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{
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virtio_input_dev->type = VIRTIO_INPUT_TYPE_TABLET;
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virtio_input_dev->parent.type = RT_Device_Class_Touch;
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flag = RT_DEVICE_FLAG_STANDALONE | RT_DEVICE_FLAG_INT_RX;
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}
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else
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{
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if (virtio_input_dev->config->ids.product == EV_KEY)
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{
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virtio_input_dev->type = VIRTIO_INPUT_TYPE_KEYBOARD;
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}
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else
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{
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virtio_input_dev->type = VIRTIO_INPUT_TYPE_MOUSE;
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}
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/* Replace it to "KeyBoard" or "Mouse" if support in the future */
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virtio_input_dev->parent.type = RT_Device_Class_Miscellaneous;
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flag = RT_DEVICE_FLAG_RDWR;
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}
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#ifdef RT_USING_DEVICE_OPS
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virtio_input_dev->parent.ops = &virtio_input_ops;
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#else
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virtio_input_dev->parent.init = virtio_input_init;
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virtio_input_dev->parent.open = RT_NULL;
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virtio_input_dev->parent.close = RT_NULL;
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virtio_input_dev->parent.read = virtio_input_read;
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virtio_input_dev->parent.write = virtio_input_write;
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virtio_input_dev->parent.control = virtio_input_control;
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#endif
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rt_snprintf(dev_name, RT_NAME_MAX, "virtio-input%d", dev_no++);
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rt_mutex_init(&virtio_input_dev->rw_mutex, dev_name, RT_IPC_FLAG_PRIO);
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rt_hw_interrupt_install(irq, virtio_input_isr, virtio_input_dev, dev_name);
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rt_hw_interrupt_umask(irq);
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return rt_device_register((rt_device_t)virtio_input_dev, dev_name, flag);
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_alloc_fail:
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if (virtio_input_dev != RT_NULL)
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{
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virtio_queues_free(virtio_dev);
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rt_free(virtio_input_dev);
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}
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return -RT_ENOMEM;
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}
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#endif /* RT_USING_VIRTIO_INPUT */
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