- struct imx_port_ucrs old_ucr;
- unsigned int status;
- unsigned char c;
-
- /* save control registers */
- imx_port_ucrs_save(port, &old_ucr);
-
- /* disable interrupts */
- writel(UCR1_UARTEN, port->membase + UCR1);
- writel(old_ucr.ucr2 & ~(UCR2_ATEN | UCR2_RTSEN | UCR2_ESCI),
- port->membase + UCR2);
- writel(old_ucr.ucr3 & ~(UCR3_DCD | UCR3_RI | UCR3_DTREN),
- port->membase + UCR3);
-
- /* poll */
- do {
- status = readl(port->membase + USR2);
- } while (~status & USR2_RDR);
-
- /* read */
- c = readl(port->membase + URXD0);
-
- /* restore control registers */
- imx_port_ucrs_restore(port, &old_ucr);