C++ (Cpp) pl010_modem_status示例

示例#1

static irqreturn_t pl010_int(int irq, void *dev_id)
{
	struct uart_port *port = dev_id;
	unsigned int status, pass_counter = AMBA_ISR_PASS_LIMIT;
	int handled = 0;

	spin_lock(&port->lock);

	status = readb(port->membase + UART010_IIR);
	if (status) {
		do {
			if (status & (UART010_IIR_RTIS | UART010_IIR_RIS))
				pl010_rx_chars(port);
			if (status & UART010_IIR_MIS)
				pl010_modem_status(port);
			if (status & UART010_IIR_TIS)
				pl010_tx_chars(port);

			if (pass_counter-- == 0)
				break;

			status = readb(port->membase + UART010_IIR);
		} while (status & (UART010_IIR_RTIS | UART010_IIR_RIS |
				   UART010_IIR_TIS));
		handled = 1;
	}

	spin_unlock(&port->lock);

	return IRQ_RETVAL(handled);
}

示例#2

文件： amba-pl010.c 项目： BackupTheBerlios/tew632-brp-svn

static irqreturn_t pl010_int(int irq, void *dev_id, struct pt_regs *regs)
{
	struct uart_port *port = dev_id;
	unsigned int status, pass_counter = AMBA_ISR_PASS_LIMIT;
	int handled = 0;

	spin_lock(&port->lock);

	status = UART_GET_INT_STATUS(port);
	if (status) {
		do {
			if (status & (UART010_IIR_RTIS | UART010_IIR_RIS))
#ifdef SUPPORT_SYSRQ
				pl010_rx_chars(port, regs);
#else
				pl010_rx_chars(port);
#endif
			if (status & UART010_IIR_MIS)
				pl010_modem_status(port);
			if (status & UART010_IIR_TIS)
				pl010_tx_chars(port);

			if (pass_counter-- == 0)
				break;

			status = UART_GET_INT_STATUS(port);
		} while (status & (UART010_IIR_RTIS | UART010_IIR_RIS |
				   UART010_IIR_TIS));
		handled = 1;
	}

	spin_unlock(&port->lock);

	return IRQ_RETVAL(handled);
}