serial8250_out_MCR
serial8250_out_MCR(up, 0);
serial8250_out_MCR(up, UART_MCR_RTS);
serial8250_out_MCR(up, 0);
serial8250_out_MCR(up, UART_MCR_RTS);
serial8250_out_MCR(up, mcr | UART_MCR_TCRTLR);
serial8250_out_MCR(up, mcr);
serial8250_out_MCR(up, UART_MCR_LOOP | UART_MCR_OUT2 | UART_MCR_RTS);
serial8250_out_MCR(up, save_mcr);
serial8250_out_MCR(up, save_mcr);
serial8250_out_MCR(up, UART_MCR_OUT1 | UART_MCR_OUT2);
serial8250_out_MCR(up, 0);
serial8250_out_MCR(up, UART_MCR_DTR | UART_MCR_RTS);
serial8250_out_MCR(up,
serial8250_out_MCR(up, save_mcr);
serial8250_out_MCR(p, mcr);
serial8250_out_MCR(up, mcr);
serial8250_out_MCR(up, mcr);
serial8250_out_MCR(up, up->mcr | UART_MCR_DTR | UART_MCR_RTS);
serial8250_out_MCR(up, UART_MCR_LOOP);
serial8250_out_MCR(up, old_mcr);
serial8250_out_MCR(up, status1 ^ UART_MCR_LOOP);
serial8250_out_MCR(up, status1);