| 638 | } |
| 639 | |
| 640 | static rt_err_t rt_serial_open(struct rt_device *dev, rt_uint16_t oflag) |
| 641 | { |
| 642 | rt_uint16_t stream_flag = 0; |
| 643 | struct rt_serial_device *serial; |
| 644 | |
| 645 | RT_ASSERT(dev != RT_NULL); |
| 646 | serial = (struct rt_serial_device *)dev; |
| 647 | |
| 648 | LOG_D("open serial device: 0x%08x with open flag: 0x%04x", |
| 649 | dev, oflag); |
| 650 | /* check device flag with the open flag */ |
| 651 | if ((oflag & RT_DEVICE_FLAG_DMA_RX) && !(dev->flag & RT_DEVICE_FLAG_DMA_RX)) |
| 652 | return -RT_EIO; |
| 653 | if ((oflag & RT_DEVICE_FLAG_DMA_TX) && !(dev->flag & RT_DEVICE_FLAG_DMA_TX)) |
| 654 | return -RT_EIO; |
| 655 | if ((oflag & RT_DEVICE_FLAG_INT_RX) && !(dev->flag & RT_DEVICE_FLAG_INT_RX)) |
| 656 | return -RT_EIO; |
| 657 | if ((oflag & RT_DEVICE_FLAG_INT_TX) && !(dev->flag & RT_DEVICE_FLAG_INT_TX)) |
| 658 | return -RT_EIO; |
| 659 | |
| 660 | /* keep steam flag */ |
| 661 | if ((oflag & RT_DEVICE_FLAG_STREAM) || (dev->open_flag & RT_DEVICE_FLAG_STREAM)) |
| 662 | stream_flag = RT_DEVICE_FLAG_STREAM; |
| 663 | |
| 664 | /* get open flags */ |
| 665 | dev->open_flag = oflag & 0xff; |
| 666 | |
| 667 | #ifdef RT_USING_PINCTRL |
| 668 | /* initialize iomux in DM */ |
| 669 | rt_pin_ctrl_confs_apply_by_name(dev, RT_NULL); |
| 670 | #endif |
| 671 | |
| 672 | /* initialize the Rx/Tx structure according to open flag */ |
| 673 | if (serial->serial_rx == RT_NULL) |
| 674 | { |
| 675 | if (oflag & RT_DEVICE_FLAG_INT_RX) |
| 676 | { |
| 677 | struct rt_serial_rx_fifo* rx_fifo; |
| 678 | |
| 679 | rx_fifo = (struct rt_serial_rx_fifo*) rt_malloc (sizeof(struct rt_serial_rx_fifo) + |
| 680 | serial->config.bufsz); |
| 681 | RT_ASSERT(rx_fifo != RT_NULL); |
| 682 | rx_fifo->buffer = (rt_uint8_t*) (rx_fifo + 1); |
| 683 | rt_memset(rx_fifo->buffer, 0, serial->config.bufsz); |
| 684 | rx_fifo->put_index = 0; |
| 685 | rx_fifo->get_index = 0; |
| 686 | rx_fifo->is_full = RT_FALSE; |
| 687 | |
| 688 | serial->serial_rx = rx_fifo; |
| 689 | dev->open_flag |= RT_DEVICE_FLAG_INT_RX; |
| 690 | /* configure low level device */ |
| 691 | serial->ops->control(serial, RT_DEVICE_CTRL_SET_INT, (void *)RT_DEVICE_FLAG_INT_RX); |
| 692 | } |
| 693 | #ifdef RT_SERIAL_USING_DMA |
| 694 | else if (oflag & RT_DEVICE_FLAG_DMA_RX) |
| 695 | { |
| 696 | if (serial->config.bufsz == 0) { |
| 697 | struct rt_serial_rx_dma* rx_dma; |
nothing calls this directly
no test coverage detected