1 files changed, 101 insertions, 219 deletions

diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
index 584d791e84a6..f59fc5cea067 100644
--- a/drivers/char/rocket.c
+++ b/drivers/char/rocket.c
@@ -135,6 +135,7 @@ static int rcktpt_type[NUM_BOARDS];
 static int is_PCI[NUM_BOARDS];
 static rocketModel_t rocketModel[NUM_BOARDS];
 static int max_board;
+static const struct tty_port_operations rocket_port_ops;
 
 /*
  * The following arrays define the interrupt bits corresponding to each AIOP.
@@ -435,15 +436,15 @@ static void rp_do_transmit(struct r_port *info)
 #endif
 	if (!info)
 		return;
-	if (!info->port.tty) {
-		printk(KERN_WARNING "rp: WARNING %s called with "
-				"info->port.tty==NULL\n", __func__);
+	tty = tty_port_tty_get(&info->port);
+
+	if (tty == NULL) {
+		printk(KERN_WARNING "rp: WARNING %s called with tty==NULL\n", __func__);
 		clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
 		return;
 	}
 
 	spin_lock_irqsave(&info->slock, flags);
-	tty = info->port.tty;
 	info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
 
 	/*  Loop sending data to FIFO until done or FIFO full */
@@ -477,6 +478,7 @@ static void rp_do_transmit(struct r_port *info)
 	}
 
 	spin_unlock_irqrestore(&info->slock, flags);
+	tty_kref_put(tty);
 
 #ifdef ROCKET_DEBUG_INTR
 	printk(KERN_DEBUG "(%d,%d,%d,%d)...\n", info->xmit_cnt, info->xmit_head,
@@ -498,18 +500,18 @@ static void rp_handle_port(struct r_port *info)
 	if (!info)
 		return;
 
-	if ((info->flags & ROCKET_INITIALIZED) == 0) {
+	if ((info->port.flags & ASYNC_INITIALIZED) == 0) {
 		printk(KERN_WARNING "rp: WARNING: rp_handle_port called with "
 				"info->flags & NOT_INIT\n");
 		return;
 	}
-	if (!info->port.tty) {
+	tty = tty_port_tty_get(&info->port);
+	if (!tty) {
 		printk(KERN_WARNING "rp: WARNING: rp_handle_port called with "
-				"info->port.tty==NULL\n");
+				"tty==NULL\n");
 		return;
 	}
 	cp = &info->channel;
-	tty = info->port.tty;
 
 	IntMask = sGetChanIntID(cp) & info->intmask;
 #ifdef ROCKET_DEBUG_INTR
@@ -541,6 +543,7 @@ static void rp_handle_port(struct r_port *info)
 		printk(KERN_INFO "DSR change...\n");
 	}
 #endif
+	tty_kref_put(tty);
 }
 
 /*
@@ -649,9 +652,8 @@ static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev)
 	info->board = board;
 	info->aiop = aiop;
 	info->chan = chan;
-	info->port.closing_wait = 3000;
-	info->port.close_delay = 50;
-	init_waitqueue_head(&info->port.open_wait);
+	tty_port_init(&info->port);
+	info->port.ops = &rocket_port_ops;
 	init_completion(&info->close_wait);
 	info->flags &= ~ROCKET_MODE_MASK;
 	switch (pc104[board][line]) {
@@ -710,7 +712,7 @@ static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev)
  *  Configures a rocketport port according to its termio settings.  Called from 
  *  user mode into the driver (exception handler).  *info CD manipulation is spinlock protected.
  */
-static void configure_r_port(struct r_port *info,
+static void configure_r_port(struct tty_struct *tty, struct r_port *info,
 			     struct ktermios *old_termios)
 {
 	unsigned cflag;
@@ -718,7 +720,7 @@ static void configure_r_port(struct r_port *info,
 	unsigned rocketMode;
 	int bits, baud, divisor;
 	CHANNEL_t *cp;
-	struct ktermios *t = info->port.tty->termios;
+	struct ktermios *t = tty->termios;
 
 	cp = &info->channel;
 	cflag = t->c_cflag;
@@ -751,7 +753,7 @@ static void configure_r_port(struct r_port *info,
 	}
 
 	/* baud rate */
-	baud = tty_get_baud_rate(info->port.tty);
+	baud = tty_get_baud_rate(tty);
 	if (!baud)
 		baud = 9600;
 	divisor = ((rp_baud_base[info->board] + (baud >> 1)) / baud) - 1;
@@ -769,7 +771,7 @@ static void configure_r_port(struct r_port *info,
 	sSetBaud(cp, divisor);
 
 	/* FIXME: Should really back compute a baud rate from the divisor */
-	tty_encode_baud_rate(info->port.tty, baud, baud);
+	tty_encode_baud_rate(tty, baud, baud);
 
 	if (cflag & CRTSCTS) {
 		info->intmask |= DELTA_CTS;
@@ -794,15 +796,15 @@ static void configure_r_port(struct r_port *info,
 	 * Handle software flow control in the board
 	 */
 #ifdef ROCKET_SOFT_FLOW
-	if (I_IXON(info->port.tty)) {
+	if (I_IXON(tty)) {
 		sEnTxSoftFlowCtl(cp);
-		if (I_IXANY(info->port.tty)) {
+		if (I_IXANY(tty)) {
 			sEnIXANY(cp);
 		} else {
 			sDisIXANY(cp);
 		}
-		sSetTxXONChar(cp, START_CHAR(info->port.tty));
-		sSetTxXOFFChar(cp, STOP_CHAR(info->port.tty));
+		sSetTxXONChar(cp, START_CHAR(tty));
+		sSetTxXOFFChar(cp, STOP_CHAR(tty));
 	} else {
 		sDisTxSoftFlowCtl(cp);
 		sDisIXANY(cp);
@@ -814,24 +816,24 @@ static void configure_r_port(struct r_port *info,
 	 * Set up ignore/read mask words
 	 */
 	info->read_status_mask = STMRCVROVRH | 0xFF;
-	if (I_INPCK(info->port.tty))
+	if (I_INPCK(tty))
 		info->read_status_mask |= STMFRAMEH | STMPARITYH;
-	if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
+	if (I_BRKINT(tty) || I_PARMRK(tty))
 		info->read_status_mask |= STMBREAKH;
 
 	/*
 	 * Characters to ignore
 	 */
 	info->ignore_status_mask = 0;
-	if (I_IGNPAR(info->port.tty))
+	if (I_IGNPAR(tty))
 		info->ignore_status_mask |= STMFRAMEH | STMPARITYH;
-	if (I_IGNBRK(info->port.tty)) {
+	if (I_IGNBRK(tty)) {
 		info->ignore_status_mask |= STMBREAKH;
 		/*
 		 * If we're ignoring parity and break indicators,
 		 * ignore overruns too.  (For real raw support).
 		 */
-		if (I_IGNPAR(info->port.tty))
+		if (I_IGNPAR(tty))
 			info->ignore_status_mask |= STMRCVROVRH;
 	}
 
@@ -864,106 +866,17 @@ static void configure_r_port(struct r_port *info,
 	}
 }
 
-/*  info->port.count is considered critical, protected by spinlocks.  */
-static int block_til_ready(struct tty_struct *tty, struct file *filp,
-			   struct r_port *info)
+static int carrier_raised(struct tty_port *port)
 {
-	DECLARE_WAITQUEUE(wait, current);
-	int retval;
-	int do_clocal = 0, extra_count = 0;
-	unsigned long flags;
-
-	/*
-	 * If the device is in the middle of being closed, then block
-	 * until it's done, and then try again.
-	 */
-	if (tty_hung_up_p(filp))
-		return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
-	if (info->flags & ROCKET_CLOSING) {
-		if (wait_for_completion_interruptible(&info->close_wait))
-			return -ERESTARTSYS;
-		return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
-	}
-
-	/*
-	 * If non-blocking mode is set, or the port is not enabled,
-	 * then make the check up front and then exit.
-	 */
-	if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
-		info->flags |= ROCKET_NORMAL_ACTIVE;
-		return 0;
-	}
-	if (tty->termios->c_cflag & CLOCAL)
-		do_clocal = 1;
-
-	/*
-	 * Block waiting for the carrier detect and the line to become free.  While we are in
-	 * this loop, info->port.count is dropped by one, so that rp_close() knows when to free things.
-         * We restore it upon exit, either normal or abnormal.
-	 */
-	retval = 0;
-	add_wait_queue(&info->port.open_wait, &wait);
-#ifdef ROCKET_DEBUG_OPEN
-	printk(KERN_INFO "block_til_ready before block: ttyR%d, count = %d\n", info->line, info->port.count);
-#endif
-	spin_lock_irqsave(&info->slock, flags);
-
-#ifdef ROCKET_DISABLE_SIMUSAGE
-	info->flags |= ROCKET_NORMAL_ACTIVE;
-#else
-	if (!tty_hung_up_p(filp)) {
-		extra_count = 1;
-		info->port.count--;
-	}
-#endif
-	info->port.blocked_open++;
-
-	spin_unlock_irqrestore(&info->slock, flags);
-
-	while (1) {
-		if (tty->termios->c_cflag & CBAUD) {
-			sSetDTR(&info->channel);
-			sSetRTS(&info->channel);
-		}
-		set_current_state(TASK_INTERRUPTIBLE);
-		if (tty_hung_up_p(filp) || !(info->flags & ROCKET_INITIALIZED)) {
-			if (info->flags & ROCKET_HUP_NOTIFY)
-				retval = -EAGAIN;
-			else
-				retval = -ERESTARTSYS;
-			break;
-		}
-		if (!(info->flags & ROCKET_CLOSING) && (do_clocal || (sGetChanStatusLo(&info->channel) & CD_ACT)))
-			break;
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-#ifdef ROCKET_DEBUG_OPEN
-		printk(KERN_INFO "block_til_ready blocking: ttyR%d, count = %d, flags=0x%0x\n",
-		     info->line, info->port.count, info->flags);
-#endif
-		schedule();	/*  Don't hold spinlock here, will hang PC */
-	}
-	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&info->port.open_wait, &wait);
-
-	spin_lock_irqsave(&info->slock, flags);
-
-	if (extra_count)
-		info->port.count++;
-	info->port.blocked_open--;
-
-	spin_unlock_irqrestore(&info->slock, flags);
+	struct r_port *info = container_of(port, struct r_port, port);
+	return (sGetChanStatusLo(&info->channel) & CD_ACT) ? 1 : 0;
+}
 
-#ifdef ROCKET_DEBUG_OPEN
-	printk(KERN_INFO "block_til_ready after blocking: ttyR%d, count = %d\n",
-	       info->line, info->port.count);
-#endif
-	if (retval)
-		return retval;
-	info->flags |= ROCKET_NORMAL_ACTIVE;
-	return 0;
+static void raise_dtr_rts(struct tty_port *port)
+{
+	struct r_port *info = container_of(port, struct r_port, port);
+	sSetDTR(&info->channel);
+	sSetRTS(&info->channel);
 }
 
 /*
@@ -973,24 +886,26 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 static int rp_open(struct tty_struct *tty, struct file *filp)
 {
 	struct r_port *info;
+	struct tty_port *port;
 	int line = 0, retval;
 	CHANNEL_t *cp;
 	unsigned long page;
 
 	line = tty->index;
-	if ((line < 0) || (line >= MAX_RP_PORTS) || ((info = rp_table[line]) == NULL))
+	if (line < 0 || line >= MAX_RP_PORTS || ((info = rp_table[line]) == NULL))
 		return -ENXIO;
-
+	port = &info->port;
+	
 	page = __get_free_page(GFP_KERNEL);
 	if (!page)
 		return -ENOMEM;
 
-	if (info->flags & ROCKET_CLOSING) {
+	if (port->flags & ASYNC_CLOSING) {
 		retval = wait_for_completion_interruptible(&info->close_wait);
 		free_page(page);
 		if (retval)
 			return retval;
-		return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
+		return ((port->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
 	}
 
 	/*
@@ -1002,9 +917,9 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 		info->xmit_buf = (unsigned char *) page;
 
 	tty->driver_data = info;
-	info->port.tty = tty;
+	tty_port_tty_set(port, tty);
 
-	if (info->port.count++ == 0) {
+	if (port->count++ == 0) {
 		atomic_inc(&rp_num_ports_open);
 
 #ifdef ROCKET_DEBUG_OPEN
@@ -1019,7 +934,7 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 	/*
 	 * Info->count is now 1; so it's safe to sleep now.
 	 */
-	if ((info->flags & ROCKET_INITIALIZED) == 0) {
+	if (!test_bit(ASYNC_INITIALIZED, &port->flags)) {
 		cp = &info->channel;
 		sSetRxTrigger(cp, TRIG_1);
 		if (sGetChanStatus(cp) & CD_ACT)
@@ -1043,21 +958,21 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 		sEnRxFIFO(cp);
 		sEnTransmit(cp);
 
-		info->flags |= ROCKET_INITIALIZED;
+		set_bit(ASYNC_INITIALIZED, &info->port.flags);
 
 		/*
 		 * Set up the tty->alt_speed kludge
 		 */
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
-			info->port.tty->alt_speed = 57600;
+			tty->alt_speed = 57600;
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
-			info->port.tty->alt_speed = 115200;
+			tty->alt_speed = 115200;
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
-			info->port.tty->alt_speed = 230400;
+			tty->alt_speed = 230400;
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
-			info->port.tty->alt_speed = 460800;
+			tty->alt_speed = 460800;
 
-		configure_r_port(info, NULL);
+		configure_r_port(tty, info, NULL);
 		if (tty->termios->c_cflag & CBAUD) {
 			sSetDTR(cp);
 			sSetRTS(cp);
@@ -1066,7 +981,7 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 	/*  Starts (or resets) the maint polling loop */
 	mod_timer(&rocket_timer, jiffies + POLL_PERIOD);
 
-	retval = block_til_ready(tty, filp, info);
+	retval = tty_port_block_til_ready(port, tty, filp);
 	if (retval) {
 #ifdef ROCKET_DEBUG_OPEN
 		printk(KERN_INFO "rp_open returning after block_til_ready with %d\n", retval);
@@ -1081,8 +996,8 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
  */
 static void rp_close(struct tty_struct *tty, struct file *filp)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
-	unsigned long flags;
+	struct r_port *info = tty->driver_data;
+	struct tty_port *port = &info->port;
 	int timeout;
 	CHANNEL_t *cp;
 	
@@ -1093,53 +1008,10 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
 	printk(KERN_INFO "rp_close ttyR%d, count = %d\n", info->line, info->port.count);
 #endif
 
-	if (tty_hung_up_p(filp))
-		return;
-	spin_lock_irqsave(&info->slock, flags);
-
-	if ((tty->count == 1) && (info->port.count != 1)) {
-		/*
-		 * Uh, oh.  tty->count is 1, which means that the tty
-		 * structure will be freed.  Info->count should always
-		 * be one in these conditions.  If it's greater than
-		 * one, we've got real problems, since it means the
-		 * serial port won't be shutdown.
-		 */
-		printk(KERN_WARNING "rp_close: bad serial port count; "
-			"tty->count is 1, info->port.count is %d\n", info->port.count);
-		info->port.count = 1;
-	}
-	if (--info->port.count < 0) {
-		printk(KERN_WARNING "rp_close: bad serial port count for "
-				"ttyR%d: %d\n", info->line, info->port.count);
-		info->port.count = 0;
-	}
-	if (info->port.count) {
-		spin_unlock_irqrestore(&info->slock, flags);
+	if (tty_port_close_start(port, tty, filp) == 0)
 		return;
-	}
-	info->flags |= ROCKET_CLOSING;
-	spin_unlock_irqrestore(&info->slock, flags);
 
 	cp = &info->channel;
-
-	/*
-	 * Notify the line discpline to only process XON/XOFF characters
-	 */
-	tty->closing = 1;
-
-	/*
-	 * If transmission was throttled by the application request,
-	 * just flush the xmit buffer.
-	 */
-	if (tty->flow_stopped)
-		rp_flush_buffer(tty);
-
-	/*
-	 * Wait for the transmit buffer to clear
-	 */
-	if (info->port.closing_wait != ROCKET_CLOSING_WAIT_NONE)
-		tty_wait_until_sent(tty, info->port.closing_wait);
 	/*
 	 * Before we drop DTR, make sure the UART transmitter
 	 * has completely drained; this is especially
@@ -1168,19 +1040,24 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
 
 	clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
 
-	if (info->port.blocked_open) {
-		if (info->port.close_delay) {
-			msleep_interruptible(jiffies_to_msecs(info->port.close_delay));
+	/* We can't yet use tty_port_close_end as the buffer handling in this
+	   driver is a bit different to the usual */
+
+	if (port->blocked_open) {
+		if (port->close_delay) {
+			msleep_interruptible(jiffies_to_msecs(port->close_delay));
 		}
-		wake_up_interruptible(&info->port.open_wait);
+		wake_up_interruptible(&port->open_wait);
 	} else {
 		if (info->xmit_buf) {
 			free_page((unsigned long) info->xmit_buf);
 			info->xmit_buf = NULL;
 		}
 	}
-	info->flags &= ~(ROCKET_INITIALIZED | ROCKET_CLOSING | ROCKET_NORMAL_ACTIVE);
+	info->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_CLOSING | ASYNC_NORMAL_ACTIVE);
 	tty->closing = 0;
+	tty_port_tty_set(port, NULL);
+	wake_up_interruptible(&port->close_wait);
 	complete_all(&info->close_wait);
 	atomic_dec(&rp_num_ports_open);
 
@@ -1195,7 +1072,7 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
 static void rp_set_termios(struct tty_struct *tty,
 			   struct ktermios *old_termios)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 	unsigned cflag;
 
@@ -1213,7 +1090,7 @@ static void rp_set_termios(struct tty_struct *tty,
 	/* Or CMSPAR */
 	tty->termios->c_cflag &= ~CMSPAR;
 
-	configure_r_port(info, old_termios);
+	configure_r_port(tty, info, old_termios);
 
 	cp = &info->channel;
 
@@ -1238,7 +1115,7 @@ static void rp_set_termios(struct tty_struct *tty,
 
 static int rp_break(struct tty_struct *tty, int break_state)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	unsigned long flags;
 
 	if (rocket_paranoia_check(info, "rp_break"))
@@ -1284,7 +1161,7 @@ static int sGetChanRI(CHANNEL_T * ChP)
  */
 static int rp_tiocmget(struct tty_struct *tty, struct file *file)
 {
-	struct r_port *info = (struct r_port *)tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	unsigned int control, result, ChanStatus;
 
 	ChanStatus = sGetChanStatusLo(&info->channel);
@@ -1305,7 +1182,7 @@ static int rp_tiocmget(struct tty_struct *tty, struct file *file)
 static int rp_tiocmset(struct tty_struct *tty, struct file *file,
 		    unsigned int set, unsigned int clear)
 {
-	struct r_port *info = (struct r_port *)tty->driver_data;
+	struct r_port *info = tty->driver_data;
 
 	if (set & TIOCM_RTS)
 		info->channel.TxControl[3] |= SET_RTS;
@@ -1338,7 +1215,8 @@ static int get_config(struct r_port *info, struct rocket_config __user *retinfo)
 	return 0;
 }
 
-static int set_config(struct r_port *info, struct rocket_config __user *new_info)
+static int set_config(struct tty_struct *tty, struct r_port *info,
+					struct rocket_config __user *new_info)
 {
 	struct rocket_config new_serial;
 
@@ -1350,7 +1228,7 @@ static int set_config(struct r_port *info, struct rocket_config __user *new_info
 		if ((new_serial.flags & ~ROCKET_USR_MASK) != (info->flags & ~ROCKET_USR_MASK))
 			return -EPERM;
 		info->flags = ((info->flags & ~ROCKET_USR_MASK) | (new_serial.flags & ROCKET_USR_MASK));
-		configure_r_port(info, NULL);
+		configure_r_port(tty, info, NULL);
 		return 0;
 	}
 
@@ -1359,15 +1237,15 @@ static int set_config(struct r_port *info, struct rocket_config __user *new_info
 	info->port.closing_wait = new_serial.closing_wait;
 
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
-		info->port.tty->alt_speed = 57600;
+		tty->alt_speed = 57600;
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
-		info->port.tty->alt_speed = 115200;
+		tty->alt_speed = 115200;
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
-		info->port.tty->alt_speed = 230400;
+		tty->alt_speed = 230400;
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
-		info->port.tty->alt_speed = 460800;
+		tty->alt_speed = 460800;
 
-	configure_r_port(info, NULL);
+	configure_r_port(tty, info, NULL);
 	return 0;
 }
 
@@ -1434,7 +1312,7 @@ static int get_version(struct r_port *info, struct rocket_version __user *retver
 static int rp_ioctl(struct tty_struct *tty, struct file *file,
 		    unsigned int cmd, unsigned long arg)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	void __user *argp = (void __user *)arg;
 	int ret = 0;
 
@@ -1452,7 +1330,7 @@ static int rp_ioctl(struct tty_struct *tty, struct file *file,
 		ret = get_config(info, argp);
 		break;
 	case RCKP_SET_CONFIG:
-		ret = set_config(info, argp);
+		ret = set_config(tty, info, argp);
 		break;
 	case RCKP_GET_PORTS:
 		ret = get_ports(info, argp);
@@ -1472,7 +1350,7 @@ static int rp_ioctl(struct tty_struct *tty, struct file *file,
 
 static void rp_send_xchar(struct tty_struct *tty, char ch)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 
 	if (rocket_paranoia_check(info, "rp_send_xchar"))
@@ -1487,7 +1365,7 @@ static void rp_send_xchar(struct tty_struct *tty, char ch)
 
 static void rp_throttle(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 
 #ifdef ROCKET_DEBUG_THROTTLE
@@ -1507,7 +1385,7 @@ static void rp_throttle(struct tty_struct *tty)
 
 static void rp_unthrottle(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 #ifdef ROCKET_DEBUG_THROTTLE
 	printk(KERN_INFO "unthrottle %s: %d....\n", tty->name,
@@ -1534,7 +1412,7 @@ static void rp_unthrottle(struct tty_struct *tty)
  */
 static void rp_stop(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 
 #ifdef ROCKET_DEBUG_FLOW
 	printk(KERN_INFO "stop %s: %d %d....\n", tty->name,
@@ -1550,7 +1428,7 @@ static void rp_stop(struct tty_struct *tty)
 
 static void rp_start(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 
 #ifdef ROCKET_DEBUG_FLOW
 	printk(KERN_INFO "start %s: %d %d....\n", tty->name,
@@ -1570,7 +1448,7 @@ static void rp_start(struct tty_struct *tty)
  */
 static void rp_wait_until_sent(struct tty_struct *tty, int timeout)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 	unsigned long orig_jiffies;
 	int check_time, exit_time;
@@ -1627,7 +1505,7 @@ static void rp_wait_until_sent(struct tty_struct *tty, int timeout)
 static void rp_hangup(struct tty_struct *tty)
 {
 	CHANNEL_t *cp;
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 
 	if (rocket_paranoia_check(info, "rp_hangup"))
 		return;
@@ -1636,15 +1514,13 @@ static void rp_hangup(struct tty_struct *tty)
 	printk(KERN_INFO "rp_hangup of ttyR%d...\n", info->line);
 #endif
 	rp_flush_buffer(tty);
-	if (info->flags & ROCKET_CLOSING)
+	if (info->port.flags & ASYNC_CLOSING)
 		return;
 	if (info->port.count)
 		atomic_dec(&rp_num_ports_open);
 	clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
 
-	info->port.count = 0;
-	info->flags &= ~ROCKET_NORMAL_ACTIVE;
-	info->port.tty = NULL;
+	tty_port_hangup(&info->port);
 
 	cp = &info->channel;
 	sDisRxFIFO(cp);
@@ -1653,7 +1529,7 @@ static void rp_hangup(struct tty_struct *tty)
 	sDisCTSFlowCtl(cp);
 	sDisTxSoftFlowCtl(cp);
 	sClrTxXOFF(cp);
-	info->flags &= ~ROCKET_INITIALIZED;
+	info->port.flags &= ~ASYNC_INITIALIZED;
 
 	wake_up_interruptible(&info->port.open_wait);
 }
@@ -1667,7 +1543,7 @@ static void rp_hangup(struct tty_struct *tty)
  */
 static int rp_put_char(struct tty_struct *tty, unsigned char ch)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 	unsigned long flags;
 
@@ -1714,7 +1590,7 @@ static int rp_put_char(struct tty_struct *tty, unsigned char ch)
 static int rp_write(struct tty_struct *tty,
 		    const unsigned char *buf, int count)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 	const unsigned char *b;
 	int c, retval = 0;
@@ -1764,7 +1640,8 @@ static int rp_write(struct tty_struct *tty,
 
 	/*  Write remaining data into the port's xmit_buf */
 	while (1) {
-		if (!info->port.tty)		/* Seemingly obligatory check... */
+		/* Hung up ? */
+		if (!test_bit(ASYNC_NORMAL_ACTIVE, &info->port.flags))
 			goto end;
 		c = min(count, XMIT_BUF_SIZE - info->xmit_cnt - 1);
 		c = min(c, XMIT_BUF_SIZE - info->xmit_head);
@@ -1806,7 +1683,7 @@ end:
  */
 static int rp_write_room(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	int ret;
 
 	if (rocket_paranoia_check(info, "rp_write_room"))
@@ -1827,7 +1704,7 @@ static int rp_write_room(struct tty_struct *tty)
  */
 static int rp_chars_in_buffer(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 
 	if (rocket_paranoia_check(info, "rp_chars_in_buffer"))
@@ -1848,7 +1725,7 @@ static int rp_chars_in_buffer(struct tty_struct *tty)
  */
 static void rp_flush_buffer(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 	unsigned long flags;
 
@@ -2371,6 +2248,11 @@ static const struct tty_operations rocket_ops = {
 	.tiocmset = rp_tiocmset,
 };
 
+static const struct tty_port_operations rocket_port_ops = {
+	.carrier_raised = carrier_raised,
+	.raise_dtr_rts = raise_dtr_rts,
+};
+
 /*
  * The module "startup" routine; it's run when the module is loaded.
  */