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Send poll() notification when the Tx buffer is flushed

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ligd 2018-08-26 09:39:16 -06:00 committed by Gregory Nutt
parent 55b7938f0a
commit 4c4d2b54a3
1 changed files with 18 additions and 8 deletions
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26
drivers/serial/serial.c
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@ -597,16 +597,9 @@ static int uart_open(FAR struct file *filep)
goto errout_with_sem;
}
/* Mark the io buffers empty */
dev->xmit.head = 0;
dev->xmit.tail = 0;
dev->recv.head = 0;
dev->recv.tail = 0;
#ifdef CONFIG_SERIAL_TERMIOS
/* Initialize termios state */
#ifdef CONFIG_SERIAL_TERMIOS
dev->tc_iflag = 0;
if (dev->isconsole)
{
@ -687,6 +680,13 @@ static int uart_close(FAR struct file *filep)
(void)uart_tcdrain(dev, 4 * TICK_PER_SEC);
}
/* Mark the I/O buffers empty */
dev->xmit.head = 0;
dev->xmit.tail = 0;
dev->recv.head = 0;
dev->recv.tail = 0;
/* Free the IRQ and disable the UART */
flags = enter_critical_section(); /* Disable interrupts */
@ -1350,12 +1350,22 @@ static int uart_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
dev->recv.head = 0;
dev->recv.tail = 0;
#ifdef CONFIG_SERIAL_IFLOWCONTROL
/* De-activate RX flow control. */
uart_rxflowcontrol(dev, 0, false);
#endif
}
if (arg == TCOFLUSH || arg == TCIOFLUSH)
{
dev->xmit.head = 0;
dev->xmit.tail = 0;
/* Inform any waiters there there is space available. */
uart_datasent(dev);
}
leave_critical_section(flags);