Esempi in C++ (Cpp) per cdns_uart_handle_rx

Esempio n. 1

File: xilinx_uartps.c Progetto: 020gzh/linux

/**
 * cdns_uart_isr - Interrupt handler
 * @irq: Irq number
 * @dev_id: Id of the port
 *
 * Return: IRQHANDLED
 */
static irqreturn_t cdns_uart_isr(int irq, void *dev_id)
{
	struct uart_port *port = (struct uart_port *)dev_id;
	unsigned long flags;
	unsigned int isrstatus;

	spin_lock_irqsave(&port->lock, flags);

	/* Read the interrupt status register to determine which
	 * interrupt(s) is/are active.
	 */
	isrstatus = readl(port->membase + CDNS_UART_ISR);

	if (isrstatus & CDNS_UART_RX_IRQS)
		cdns_uart_handle_rx(port, isrstatus);

	if ((isrstatus & CDNS_UART_IXR_TXEMPTY) == CDNS_UART_IXR_TXEMPTY)
		cdns_uart_handle_tx(port);

	writel(isrstatus, port->membase + CDNS_UART_ISR);

	/* be sure to release the lock and tty before leaving */
	spin_unlock_irqrestore(&port->lock, flags);

	return IRQ_HANDLED;
}

Esempio n. 2

File: xilinx_uartps.c Progetto: hbeishang/linux-xlnx

/**
 * cdns_uart_isr - Interrupt handler
 * @irq: Irq number
 * @dev_id: Id of the port
 *
 * Return: IRQHANDLED
 */
static irqreturn_t cdns_uart_isr(int irq, void *dev_id)
{
	struct uart_port *port = (struct uart_port *)dev_id;
	unsigned int isrstatus;

	spin_lock(&port->lock);

	/* Read the interrupt status register to determine which
	 * interrupt(s) is/are active and clear them.
	 */
	isrstatus = cdns_uart_readl(CDNS_UART_ISR_OFFSET);
	cdns_uart_writel(isrstatus, CDNS_UART_ISR_OFFSET);

	if (isrstatus & CDNS_UART_IXR_TXEMPTY) {
		cdns_uart_handle_tx(dev_id);
		isrstatus &= ~CDNS_UART_IXR_TXEMPTY;
	}
	if (isrstatus & CDNS_UART_IXR_MASK)
		cdns_uart_handle_rx(dev_id, isrstatus);

	spin_unlock(&port->lock);
	return IRQ_HANDLED;
}