22 #include <linux/tty.h>
121 	 * tty is being closed because that is the only time the write lock is  in hci_uart_tx_wakeup()
150 	struct tty_struct *tty = hu->tty;  in hci_uart_write_work()  local
164 		set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);  in hci_uart_write_work()
165 		len = tty->ops->write(tty, skb->data, skb->len);  in hci_uart_write_work()
230 	struct tty_struct *tty = hu->tty;  in hci_uart_flush()  local
232 	BT_DBG("hdev %p tty %p", hdev, tty);  in hci_uart_flush()
239 	tty_ldisc_flush(tty);  in hci_uart_flush()
240 	tty_driver_flush_buffer(tty);  in hci_uart_flush()
297 /* Check the underlying device or tty has flow control support */
304 	if (hu->tty->driver->ops->tiocmget && hu->tty->driver->ops->tiocmset)  in hci_uart_has_flow_control()
313 	struct tty_struct *tty = hu->tty;  in hci_uart_set_flow_control()  local
327 		ktermios = tty->termios;  in hci_uart_set_flow_control()
329 		tty_set_termios(tty, &ktermios);  in hci_uart_set_flow_control()
331 		       (tty->termios.c_cflag & CRTSCTS) ? "failed" : "success");  in hci_uart_set_flow_control()
335 		status = tty->driver->ops->tiocmget(tty);  in hci_uart_set_flow_control()
344 		status = tty->driver->ops->tiocmset(tty, set, clear);  in hci_uart_set_flow_control()
348 		status = tty->driver->ops->tiocmget(tty);  in hci_uart_set_flow_control()
357 		status = tty->driver->ops->tiocmset(tty, set, clear);  in hci_uart_set_flow_control()
361 		ktermios = tty->termios;  in hci_uart_set_flow_control()
363 		tty_set_termios(tty, &ktermios);  in hci_uart_set_flow_control()
365 		       !(tty->termios.c_cflag & CRTSCTS) ? "failed" : "success");  in hci_uart_set_flow_control()
378 	struct tty_struct *tty = hu->tty;  in hci_uart_set_baudrate()  local
381 	ktermios = tty->termios;  in hci_uart_set_baudrate()
386 	tty_set_termios(tty, &ktermios);  in hci_uart_set_baudrate()
388 	BT_DBG("%s: New tty speeds: %d/%d", hu->hdev->name,  in hci_uart_set_baudrate()
389 	       tty->termios.c_ispeed, tty->termios.c_ospeed);  in hci_uart_set_baudrate()
475  *     tty    pointer to tty info structure
479 static int hci_uart_tty_open(struct tty_struct *tty)  in hci_uart_tty_open()  argument
483 	BT_DBG("tty %p", tty);  in hci_uart_tty_open()
488 	/* Error if the tty has no write op instead of leaving an exploitable  in hci_uart_tty_open()
491 	if (tty->ops->write == NULL)  in hci_uart_tty_open()
505 	tty->disc_data = hu;  in hci_uart_tty_open()
506 	hu->tty = tty;  in hci_uart_tty_open()
507 	tty->receive_room = 65536;  in hci_uart_tty_open()
514 	hu->oper_speed = tty->termios.c_ospeed;  in hci_uart_tty_open()
520 	tty_driver_flush_buffer(tty);  in hci_uart_tty_open()
528  *    else, the tty is closed, or the tty detects a hangup.
530 static void hci_uart_tty_close(struct tty_struct *tty)  in hci_uart_tty_close()  argument
532 	struct hci_uart *hu = tty->disc_data;  in hci_uart_tty_close()
535 	BT_DBG("tty %p", tty);  in hci_uart_tty_close()
537 	/* Detach from the tty */  in hci_uart_tty_close()
538 	tty->disc_data = NULL;  in hci_uart_tty_close()
574  * Arguments:        tty    pointer to associated tty instance data
577 static void hci_uart_tty_wakeup(struct tty_struct *tty)  in hci_uart_tty_wakeup()  argument
579 	struct hci_uart *hu = tty->disc_data;  in hci_uart_tty_wakeup()
586 	clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);  in hci_uart_tty_wakeup()
588 	if (tty != hu->tty)  in hci_uart_tty_wakeup()
598  *     Called by tty low level driver when receive data is
601  * Arguments:  tty          pointer to tty instance data
608 static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data,  in hci_uart_tty_receive()  argument
611 	struct hci_uart *hu = tty->disc_data;  in hci_uart_tty_receive()
613 	if (!hu || tty != hu->tty)  in hci_uart_tty_receive()
625 	 * tty caller  in hci_uart_tty_receive()
633 	tty_unthrottle(tty);  in hci_uart_tty_receive()
667 	SET_HCIDEV_DEV(hdev, hu->tty->dev);  in hci_uart_register_dev()
746  *    Process IOCTL system call for the tty device.
750  *    tty        pointer to tty instance data
756 static int hci_uart_tty_ioctl(struct tty_struct *tty, unsigned int cmd,  in hci_uart_tty_ioctl()  argument
759 	struct hci_uart *hu = tty->disc_data;  in hci_uart_tty_ioctl()
805 		err = n_tty_ioctl_helper(tty, cmd, arg);  in hci_uart_tty_ioctl()
815 static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file,  in hci_uart_tty_read()  argument
822 static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file,  in hci_uart_tty_write()  argument
848 	/* Register the tty discipline */  in hci_uart_init()