34 #include <linux/tty.h>
141 	 * the tty layer. Be careful to prevent any further access  in sdio_uart_port_remove()
142 	 * to the SDIO function and arrange for the tty layer to  in sdio_uart_port_remove()
411 	struct tty_struct *tty;  in sdio_uart_transmit_chars()  local
422 	tty = tty_port_tty_get(&port->port);  in sdio_uart_transmit_chars()
424 	if (tty == NULL || !kfifo_len(xmit) ||  in sdio_uart_transmit_chars()
425 				tty->flow.stopped || tty->hw_stopped) {  in sdio_uart_transmit_chars()
427 		tty_kref_put(tty);  in sdio_uart_transmit_chars()
439 		tty_wakeup(tty);  in sdio_uart_transmit_chars()
443 	tty_kref_put(tty);  in sdio_uart_transmit_chars()
448 	struct tty_struct *tty;  in sdio_uart_check_modem_status()  local
466 			/* DCD drop - hang up if tty attached */  in sdio_uart_check_modem_status()
472 		tty = tty_port_tty_get(&port->port);  in sdio_uart_check_modem_status()
473 		if (tty && C_CRTSCTS(tty)) {  in sdio_uart_check_modem_status()
475 			if (tty->hw_stopped) {  in sdio_uart_check_modem_status()
477 					tty->hw_stopped = false;  in sdio_uart_check_modem_status()
479 					tty_wakeup(tty);  in sdio_uart_check_modem_status()
483 					tty->hw_stopped = true;  in sdio_uart_check_modem_status()
488 		tty_kref_put(tty);  in sdio_uart_check_modem_status()
504 	 * interaction with the tty core may end up calling us back  in sdio_uart_irq()
540  *	@tport: tty port to be updated
543  *	Called by the tty port helpers when the modem signals need to be
563  *	@tport: tty port to activate
564  *	@tty: tty bound to this port
566  *	Activate a tty port. The port locking guarantees us this will be
576 static int sdio_uart_activate(struct tty_port *tport, struct tty_struct *tty)  in sdio_uart_activate()  argument
583 	 * Set the TTY IO error marker - we will only clear this  in sdio_uart_activate()
586 	set_bit(TTY_IO_ERROR, &tty->flags);  in sdio_uart_activate()
625 	sdio_uart_change_speed(port, &tty->termios, NULL);  in sdio_uart_activate()
627 	if (C_BAUD(tty))  in sdio_uart_activate()
630 	if (C_CRTSCTS(tty))  in sdio_uart_activate()
632 			tty->hw_stopped = true;  in sdio_uart_activate()
634 	clear_bit(TTY_IO_ERROR, &tty->flags);  in sdio_uart_activate()
651  *	@tport: tty port to shut down
653  *	Deactivate a tty port. The port locking guarantees us this will be
702  *	@tty: the tty being bound
704  *	Look up and bind the tty and the driver together. Initialize
708 static int sdio_uart_install(struct tty_driver *driver, struct tty_struct *tty)  in sdio_uart_install()  argument
710 	int idx = tty->index;  in sdio_uart_install()
712 	int ret = tty_standard_install(driver, tty);  in sdio_uart_install()
716 		tty->driver_data = port;  in sdio_uart_install()
723  *	sdio_uart_cleanup	-	called on the last tty kref drop
724  *	@tty: the tty being destroyed
726  *	Called asynchronously when the last reference to the tty is dropped.
727  *	We cannot destroy the tty->driver_data port kref until this point
730 static void sdio_uart_cleanup(struct tty_struct *tty)  in sdio_uart_cleanup()  argument
732 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_cleanup()
733 	tty->driver_data = NULL;	/* Bug trap */  in sdio_uart_cleanup()
741 static int sdio_uart_open(struct tty_struct *tty, struct file *filp)  in sdio_uart_open()  argument
743 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_open()
744 	return tty_port_open(&port->port, tty, filp);  in sdio_uart_open()
747 static void sdio_uart_close(struct tty_struct *tty, struct file * filp)  in sdio_uart_close()  argument
749 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_close()
750 	tty_port_close(&port->port, tty, filp);  in sdio_uart_close()
753 static void sdio_uart_hangup(struct tty_struct *tty)  in sdio_uart_hangup()  argument
755 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_hangup()
759 static ssize_t sdio_uart_write(struct tty_struct *tty, const u8 *buf,  in sdio_uart_write()  argument
762 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_write()
782 static unsigned int sdio_uart_write_room(struct tty_struct *tty)  in sdio_uart_write_room()  argument
784 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_write_room()
788 static unsigned int sdio_uart_chars_in_buffer(struct tty_struct *tty)  in sdio_uart_chars_in_buffer()  argument
790 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_chars_in_buffer()
794 static void sdio_uart_send_xchar(struct tty_struct *tty, u8 ch)  in sdio_uart_send_xchar()  argument
796 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_send_xchar()
808 static void sdio_uart_throttle(struct tty_struct *tty)  in sdio_uart_throttle()  argument
810 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_throttle()
812 	if (!I_IXOFF(tty) && !C_CRTSCTS(tty))  in sdio_uart_throttle()
818 	if (I_IXOFF(tty)) {  in sdio_uart_throttle()
819 		port->x_char = STOP_CHAR(tty);  in sdio_uart_throttle()
823 	if (C_CRTSCTS(tty))  in sdio_uart_throttle()
830 static void sdio_uart_unthrottle(struct tty_struct *tty)  in sdio_uart_unthrottle()  argument
832 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_unthrottle()
834 	if (!I_IXOFF(tty) && !C_CRTSCTS(tty))  in sdio_uart_unthrottle()
840 	if (I_IXOFF(tty)) {  in sdio_uart_unthrottle()
844 			port->x_char = START_CHAR(tty);  in sdio_uart_unthrottle()
849 	if (C_CRTSCTS(tty))  in sdio_uart_unthrottle()
856 static void sdio_uart_set_termios(struct tty_struct *tty,  in sdio_uart_set_termios()  argument
859 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_set_termios()
860 	unsigned int cflag = tty->termios.c_cflag;  in sdio_uart_set_termios()
865 	sdio_uart_change_speed(port, &tty->termios, old_termios);  in sdio_uart_set_termios()
874 		if (!(cflag & CRTSCTS) || !tty_throttled(tty))  in sdio_uart_set_termios()
881 		tty->hw_stopped = false;  in sdio_uart_set_termios()
888 			tty->hw_stopped = true;  in sdio_uart_set_termios()
896 static int sdio_uart_break_ctl(struct tty_struct *tty, int break_state)  in sdio_uart_break_ctl()  argument
898 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_break_ctl()
915 static int sdio_uart_tiocmget(struct tty_struct *tty)  in sdio_uart_tiocmget()  argument
917 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_tiocmget()
929 static int sdio_uart_tiocmset(struct tty_struct *tty,  in sdio_uart_tiocmset()  argument
932 	struct sdio_uart_port *port = tty->driver_data;  in sdio_uart_tiocmset()