mxser: use tty_port

Switch mxser to use the new tty_port structure
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/char/mxser.c

@@ -222,8 +222,8 @@ struct mxser_mon_ext {
 struct mxser_board;
 
 struct mxser_port {
+	struct tty_port port;
 	struct mxser_board *board;
-	struct tty_struct *tty;
 
 	unsigned long ioaddr;
 	unsigned long opmode_ioaddr;
@@ -234,7 +234,6 @@ struct mxser_port {
 	int rx_low_water;
 	int baud_base;		/* max. speed */
 	int type;		/* UART type */
-	int flags;		/* defined in tty.h */
 
 	int x_char;		/* xon/xoff character */
 	int IER;		/* Interrupt Enable Register */
@@ -249,15 +248,12 @@ struct mxser_port {
 	unsigned char err_shadow;
 	unsigned long event;
 
-	int count;		/* # of fd on device */
-	int blocked_open;	/* # of blocked opens */
 	struct async_icount icount; /* kernel counters for 4 input interrupts */
 	int timeout;
 
 	int read_status_mask;
 	int ignore_status_mask;
 	int xmit_fifo_size;
-	unsigned char *xmit_buf;
 	int xmit_head;
 	int xmit_tail;
 	int xmit_cnt;
@@ -267,7 +263,6 @@ struct mxser_port {
 	struct mxser_mon mon_data;
 
 	spinlock_t slock;
-	wait_queue_head_t open_wait;
 	wait_queue_head_t delta_msr_wait;
 };
 
@@ -575,7 +570,7 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 	 */
 	if ((filp->f_flags & O_NONBLOCK) ||
 			test_bit(TTY_IO_ERROR, &tty->flags)) {
-		port->flags |= ASYNC_NORMAL_ACTIVE;
+		port->port.flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 
@@ -585,32 +580,32 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 	/*
 	 * Block waiting for the carrier detect and the line to become
 	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, port->count is dropped by one, so that
+	 * this loop, port->port.count is dropped by one, so that
 	 * mxser_close() knows when to free things.  We restore it upon
 	 * exit, either normal or abnormal.
 	 */
 	retval = 0;
-	add_wait_queue(&port->open_wait, &wait);
+	add_wait_queue(&port->port.open_wait, &wait);
 
 	spin_lock_irqsave(&port->slock, flags);
 	if (!tty_hung_up_p(filp))
-		port->count--;
+		port->port.count--;
 	spin_unlock_irqrestore(&port->slock, flags);
-	port->blocked_open++;
+	port->port.blocked_open++;
 	while (1) {
 		spin_lock_irqsave(&port->slock, flags);
 		outb(inb(port->ioaddr + UART_MCR) |
 			UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
 		spin_unlock_irqrestore(&port->slock, flags);
 		set_current_state(TASK_INTERRUPTIBLE);
-		if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
-			if (port->flags & ASYNC_HUP_NOTIFY)
+		if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) {
+			if (port->port.flags & ASYNC_HUP_NOTIFY)
 				retval = -EAGAIN;
 			else
 				retval = -ERESTARTSYS;
 			break;
 		}
-		if (!(port->flags & ASYNC_CLOSING) &&
+		if (!(port->port.flags & ASYNC_CLOSING) &&
 				(do_clocal ||
 				(inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
 			break;
@@ -621,13 +616,13 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 		schedule();
 	}
 	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&port->open_wait, &wait);
+	remove_wait_queue(&port->port.open_wait, &wait);
 	if (!tty_hung_up_p(filp))
-		port->count++;
-	port->blocked_open--;
+		port->port.count++;
+	port->port.blocked_open--;
 	if (retval)
 		return retval;
-	port->flags |= ASYNC_NORMAL_ACTIVE;
+	port->port.flags |= ASYNC_NORMAL_ACTIVE;
 	return 0;
 }
 
@@ -636,7 +631,7 @@ static int mxser_set_baud(struct mxser_port *info, long newspd)
 	int quot = 0, baud;
 	unsigned char cval;
 
-	if (!info->tty || !info->tty->termios)
+	if (!info->port.tty || !info->port.tty->termios)
 		return -1;
 
 	if (!(info->ioaddr))
@@ -647,13 +642,13 @@ static int mxser_set_baud(struct mxser_port *info, long newspd)
 
 	if (newspd == 134) {
 		quot = 2 * info->baud_base / 269;
-		tty_encode_baud_rate(info->tty, 134, 134);
+		tty_encode_baud_rate(info->port.tty, 134, 134);
 	} else if (newspd) {
 		quot = info->baud_base / newspd;
 		if (quot == 0)
 			quot = 1;
 		baud = info->baud_base/quot;
-		tty_encode_baud_rate(info->tty, baud, baud);
+		tty_encode_baud_rate(info->port.tty, baud, baud);
 	} else {
 		quot = 0;
 	}
@@ -679,7 +674,7 @@ static int mxser_set_baud(struct mxser_port *info, long newspd)
 	outb(cval, info->ioaddr + UART_LCR);	/* reset DLAB */
 
 #ifdef BOTHER
-	if (C_BAUD(info->tty) == BOTHER) {
+	if (C_BAUD(info->port.tty) == BOTHER) {
 		quot = info->baud_base % newspd;
 		quot *= 8;
 		if (quot % newspd > newspd / 2) {
@@ -707,14 +702,14 @@ static int mxser_change_speed(struct mxser_port *info,
 	int ret = 0;
 	unsigned char status;
 
-	if (!info->tty || !info->tty->termios)
+	if (!info->port.tty || !info->port.tty->termios)
 		return ret;
-	cflag = info->tty->termios->c_cflag;
+	cflag = info->port.tty->termios->c_cflag;
 	if (!(info->ioaddr))
 		return ret;
 
-	if (mxser_set_baud_method[info->tty->index] == 0)
-		mxser_set_baud(info, tty_get_baud_rate(info->tty));
+	if (mxser_set_baud_method[info->port.tty->index] == 0)
+		mxser_set_baud(info, tty_get_baud_rate(info->port.tty));
 
 	/* byte size and parity */
 	switch (cflag & CSIZE) {
@@ -777,15 +772,15 @@ static int mxser_change_speed(struct mxser_port *info,
 	info->IER &= ~UART_IER_MSI;
 	info->MCR &= ~UART_MCR_AFE;
 	if (cflag & CRTSCTS) {
-		info->flags |= ASYNC_CTS_FLOW;
+		info->port.flags |= ASYNC_CTS_FLOW;
 		info->IER |= UART_IER_MSI;
 		if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 			info->MCR |= UART_MCR_AFE;
 		} else {
 			status = inb(info->ioaddr + UART_MSR);
-			if (info->tty->hw_stopped) {
+			if (info->port.tty->hw_stopped) {
 				if (status & UART_MSR_CTS) {
-					info->tty->hw_stopped = 0;
+					info->port.tty->hw_stopped = 0;
 					if (info->type != PORT_16550A &&
 							!info->board->chip_flag) {
 						outb(info->IER & ~UART_IER_THRI,
@@ -795,11 +790,11 @@ static int mxser_change_speed(struct mxser_port *info,
 						outb(info->IER, info->ioaddr +
 								UART_IER);
 					}
-					tty_wakeup(info->tty);
+					tty_wakeup(info->port.tty);
 				}
 			} else {
 				if (!(status & UART_MSR_CTS)) {
-					info->tty->hw_stopped = 1;
+					info->port.tty->hw_stopped = 1;
 					if ((info->type != PORT_16550A) &&
 							(!info->board->chip_flag)) {
 						info->IER &= ~UART_IER_THRI;
@@ -810,13 +805,13 @@ static int mxser_change_speed(struct mxser_port *info,
 			}
 		}
 	} else {
-		info->flags &= ~ASYNC_CTS_FLOW;
+		info->port.flags &= ~ASYNC_CTS_FLOW;
 	}
 	outb(info->MCR, info->ioaddr + UART_MCR);
 	if (cflag & CLOCAL) {
-		info->flags &= ~ASYNC_CHECK_CD;
+		info->port.flags &= ~ASYNC_CHECK_CD;
 	} else {
-		info->flags |= ASYNC_CHECK_CD;
+		info->port.flags |= ASYNC_CHECK_CD;
 		info->IER |= UART_IER_MSI;
 	}
 	outb(info->IER, info->ioaddr + UART_IER);
@@ -825,21 +820,21 @@ static int mxser_change_speed(struct mxser_port *info,
 	 * Set up parity check flag
 	 */
 	info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
-	if (I_INPCK(info->tty))
+	if (I_INPCK(info->port.tty))
 		info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
-	if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
+	if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
 		info->read_status_mask |= UART_LSR_BI;
 
 	info->ignore_status_mask = 0;
 
-	if (I_IGNBRK(info->tty)) {
+	if (I_IGNBRK(info->port.tty)) {
 		info->ignore_status_mask |= UART_LSR_BI;
 		info->read_status_mask |= UART_LSR_BI;
 		/*
 		 * If we're ignore parity and break indicators, ignore
 		 * overruns too.  (For real raw support).
 		 */
-		if (I_IGNPAR(info->tty)) {
+		if (I_IGNPAR(info->port.tty)) {
 			info->ignore_status_mask |=
 						UART_LSR_OE |
 						UART_LSR_PE |
@@ -851,16 +846,16 @@ static int mxser_change_speed(struct mxser_port *info,
 		}
 	}
 	if (info->board->chip_flag) {
-		mxser_set_must_xon1_value(info->ioaddr, START_CHAR(info->tty));
-		mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(info->tty));
-		if (I_IXON(info->tty)) {
+		mxser_set_must_xon1_value(info->ioaddr, START_CHAR(info->port.tty));
+		mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(info->port.tty));
+		if (I_IXON(info->port.tty)) {
 			mxser_enable_must_rx_software_flow_control(
 					info->ioaddr);
 		} else {
 			mxser_disable_must_rx_software_flow_control(
 					info->ioaddr);
 		}
-		if (I_IXOFF(info->tty)) {
+		if (I_IXOFF(info->port.tty)) {
 			mxser_enable_must_tx_software_flow_control(
 					info->ioaddr);
 		} else {
@@ -890,15 +885,15 @@ static void mxser_check_modem_status(struct mxser_port *port, int status)
 	port->mon_data.modem_status = status;
 	wake_up_interruptible(&port->delta_msr_wait);
 
-	if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
+	if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 		if (status & UART_MSR_DCD)
-			wake_up_interruptible(&port->open_wait);
+			wake_up_interruptible(&port->port.open_wait);
 	}
 
-	if (port->flags & ASYNC_CTS_FLOW) {
-		if (port->tty->hw_stopped) {
+	if (port->port.flags & ASYNC_CTS_FLOW) {
+		if (port->port.tty->hw_stopped) {
 			if (status & UART_MSR_CTS) {
-				port->tty->hw_stopped = 0;
+				port->port.tty->hw_stopped = 0;
 
 				if ((port->type != PORT_16550A) &&
 						(!port->board->chip_flag)) {
@@ -908,11 +903,11 @@ static void mxser_check_modem_status(struct mxser_port *port, int status)
 					outb(port->IER, port->ioaddr +
 							UART_IER);
 				}
-				tty_wakeup(port->tty);
+				tty_wakeup(port->port.tty);
 			}
 		} else {
 			if (!(status & UART_MSR_CTS)) {
-				port->tty->hw_stopped = 1;
+				port->port.tty->hw_stopped = 1;
 				if (port->type != PORT_16550A &&
 						!port->board->chip_flag) {
 					port->IER &= ~UART_IER_THRI;
@@ -935,23 +930,23 @@ static int mxser_startup(struct mxser_port *info)
 
 	spin_lock_irqsave(&info->slock, flags);
 
-	if (info->flags & ASYNC_INITIALIZED) {
+	if (info->port.flags & ASYNC_INITIALIZED) {
 		free_page(page);
 		spin_unlock_irqrestore(&info->slock, flags);
 		return 0;
 	}
 
 	if (!info->ioaddr || !info->type) {
-		if (info->tty)
-			set_bit(TTY_IO_ERROR, &info->tty->flags);
+		if (info->port.tty)
+			set_bit(TTY_IO_ERROR, &info->port.tty->flags);
 		free_page(page);
 		spin_unlock_irqrestore(&info->slock, flags);
 		return 0;
 	}
-	if (info->xmit_buf)
+	if (info->port.xmit_buf)
 		free_page(page);
 	else
-		info->xmit_buf = (unsigned char *) page;
+		info->port.xmit_buf = (unsigned char *) page;
 
 	/*
 	 * Clear the FIFO buffers and disable them
@@ -973,8 +968,8 @@ static int mxser_startup(struct mxser_port *info)
 	if (inb(info->ioaddr + UART_LSR) == 0xff) {
 		spin_unlock_irqrestore(&info->slock, flags);
 		if (capable(CAP_SYS_ADMIN)) {
-			if (info->tty)
-				set_bit(TTY_IO_ERROR, &info->tty->flags);
+			if (info->port.tty)
+				set_bit(TTY_IO_ERROR, &info->port.tty->flags);
 			return 0;
 		} else
 			return -ENODEV;
@@ -1012,15 +1007,15 @@ static int mxser_startup(struct mxser_port *info)
 	(void) inb(info->ioaddr + UART_IIR);
 	(void) inb(info->ioaddr + UART_MSR);
 
-	if (info->tty)
-		clear_bit(TTY_IO_ERROR, &info->tty->flags);
+	if (info->port.tty)
+		clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
 	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 
 	/*
 	 * and set the speed of the serial port
 	 */
 	mxser_change_speed(info, NULL);
-	info->flags |= ASYNC_INITIALIZED;
+	info->port.flags |= ASYNC_INITIALIZED;
 	spin_unlock_irqrestore(&info->slock, flags);
 
 	return 0;
@@ -1034,7 +1029,7 @@ static void mxser_shutdown(struct mxser_port *info)
 {
 	unsigned long flags;
 
-	if (!(info->flags & ASYNC_INITIALIZED))
+	if (!(info->port.flags & ASYNC_INITIALIZED))
 		return;
 
 	spin_lock_irqsave(&info->slock, flags);
@@ -1048,15 +1043,15 @@ static void mxser_shutdown(struct mxser_port *info)
 	/*
 	 * Free the IRQ, if necessary
 	 */
-	if (info->xmit_buf) {
-		free_page((unsigned long) info->xmit_buf);
-		info->xmit_buf = NULL;
+	if (info->port.xmit_buf) {
+		free_page((unsigned long) info->port.xmit_buf);
+		info->port.xmit_buf = NULL;
 	}
 
 	info->IER = 0;
 	outb(0x00, info->ioaddr + UART_IER);
 
-	if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
+	if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))
 		info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 	outb(info->MCR, info->ioaddr + UART_MCR);
 
@@ -1072,10 +1067,10 @@ static void mxser_shutdown(struct mxser_port *info)
 	/* read data port to reset things */
 	(void) inb(info->ioaddr + UART_RX);
 
-	if (info->tty)
-		set_bit(TTY_IO_ERROR, &info->tty->flags);
+	if (info->port.tty)
+		set_bit(TTY_IO_ERROR, &info->port.tty->flags);
 
-	info->flags &= ~ASYNC_INITIALIZED;
+	info->port.flags &= ~ASYNC_INITIALIZED;
 
 	if (info->board->chip_flag)
 		SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
@@ -1105,12 +1100,12 @@ static int mxser_open(struct tty_struct *tty, struct file *filp)
 		return -ENODEV;
 
 	tty->driver_data = info;
-	info->tty = tty;
+	info->port.tty = tty;
 	/*
 	 * Start up serial port
 	 */
 	spin_lock_irqsave(&info->slock, flags);
-	info->count++;
+	info->port.count++;
 	spin_unlock_irqrestore(&info->slock, flags);
 	retval = mxser_startup(info);
 	if (retval)
@@ -1170,34 +1165,34 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
 		spin_unlock_irqrestore(&info->slock, flags);
 		return;
 	}
-	if ((tty->count == 1) && (info->count != 1)) {
+	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
+		 * structure will be freed.  Info->port.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_ERR "mxser_close: bad serial port count; "
-			"tty->count is 1, info->count is %d\n", info->count);
-		info->count = 1;
+			"tty->count is 1, info->port.count is %d\n", info->port.count);
+		info->port.count = 1;
 	}
-	if (--info->count < 0) {
+	if (--info->port.count < 0) {
 		printk(KERN_ERR "mxser_close: bad serial port count for "
-			"ttys%d: %d\n", tty->index, info->count);
-		info->count = 0;
+			"ttys%d: %d\n", tty->index, info->port.count);
+		info->port.count = 0;
 	}
-	if (info->count) {
+	if (info->port.count) {
 		spin_unlock_irqrestore(&info->slock, flags);
 		return;
 	}
-	info->flags |= ASYNC_CLOSING;
+	info->port.flags |= ASYNC_CLOSING;
 	spin_unlock_irqrestore(&info->slock, flags);
 	/*
 	 * Save the termios structure, since this port may have
 	 * separate termios for callout and dialin.
 	 */
-	if (info->flags & ASYNC_NORMAL_ACTIVE)
+	if (info->port.flags & ASYNC_NORMAL_ACTIVE)
 		info->normal_termios = *tty->termios;
 	/*
 	 * Now we wait for the transmit buffer to clear; and we notify
@@ -1216,7 +1211,7 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
 	if (info->board->chip_flag)
 		info->IER &= ~MOXA_MUST_RECV_ISR;
 
-	if (info->flags & ASYNC_INITIALIZED) {
+	if (info->port.flags & ASYNC_INITIALIZED) {
 		outb(info->IER, info->ioaddr + UART_IER);
 		/*
 		 * Before we drop DTR, make sure the UART transmitter
@@ -1237,14 +1232,14 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
 
 	tty->closing = 0;
 	info->event = 0;
-	info->tty = NULL;
-	if (info->blocked_open) {
+	info->port.tty = NULL;
+	if (info->port.blocked_open) {
 		if (info->close_delay)
 			schedule_timeout_interruptible(info->close_delay);
-		wake_up_interruptible(&info->open_wait);
+		wake_up_interruptible(&info->port.open_wait);
 	}
 
-	info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
+	info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
 }
 
 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
@@ -1253,7 +1248,7 @@ static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int cou
 	struct mxser_port *info = tty->driver_data;
 	unsigned long flags;
 
-	if (!info->xmit_buf)
+	if (!info->port.xmit_buf)
 		return 0;
 
 	while (1) {
@@ -1262,7 +1257,7 @@ static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int cou
 		if (c <= 0)
 			break;
 
-		memcpy(info->xmit_buf + info->xmit_head, buf, c);
+		memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
 		spin_lock_irqsave(&info->slock, flags);
 		info->xmit_head = (info->xmit_head + c) &
 				  (SERIAL_XMIT_SIZE - 1);
@@ -1294,14 +1289,14 @@ static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
 	struct mxser_port *info = tty->driver_data;
 	unsigned long flags;
 
-	if (!info->xmit_buf)
+	if (!info->port.xmit_buf)
 		return 0;
 
 	if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
 		return 0;
 
 	spin_lock_irqsave(&info->slock, flags);
-	info->xmit_buf[info->xmit_head++] = ch;
+	info->port.xmit_buf[info->xmit_head++] = ch;
 	info->xmit_head &= SERIAL_XMIT_SIZE - 1;
 	info->xmit_cnt++;
 	spin_unlock_irqrestore(&info->slock, flags);
@@ -1327,7 +1322,7 @@ static void mxser_flush_chars(struct tty_struct *tty)
 
 	if (info->xmit_cnt <= 0 ||
 			tty->stopped ||
-			!info->xmit_buf ||
+			!info->port.xmit_buf ||
 			(tty->hw_stopped &&
 			 (info->type != PORT_16550A) &&
 			 (!info->board->chip_flag)
@@ -1370,10 +1365,10 @@ static int mxser_get_serial_info(struct mxser_port *info,
 {
 	struct serial_struct tmp = {
 		.type = info->type,
-		.line = info->tty->index,
+		.line = info->port.tty->index,
 		.port = info->ioaddr,
 		.irq = info->board->irq,
-		.flags = info->flags,
+		.flags = info->port.flags,
 		.baud_base = info->baud_base,
 		.close_delay = info->close_delay,
 		.closing_wait = info->closing_wait,
@@ -1403,33 +1398,33 @@ static int mxser_set_serial_info(struct mxser_port *info,
 			new_serial.port != info->ioaddr)
 		return -EINVAL;
 
-	flags = info->flags & ASYNC_SPD_MASK;
+	flags = info->port.flags & ASYNC_SPD_MASK;
 
 	if (!capable(CAP_SYS_ADMIN)) {
 		if ((new_serial.baud_base != info->baud_base) ||
 				(new_serial.close_delay != info->close_delay) ||
-				((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
+				((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
 			return -EPERM;
-		info->flags = ((info->flags & ~ASYNC_USR_MASK) |
+		info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
 				(new_serial.flags & ASYNC_USR_MASK));
 	} else {
 		/*
 		 * OK, past this point, all the error checking has been done.
 		 * At this point, we start making changes.....
 		 */
-		info->flags = ((info->flags & ~ASYNC_FLAGS) |
+		info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
 				(new_serial.flags & ASYNC_FLAGS));
 		info->close_delay = new_serial.close_delay * HZ / 100;
 		info->closing_wait = new_serial.closing_wait * HZ / 100;
-		info->tty->low_latency =
-				(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-		info->tty->low_latency = 0;
-		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
+		info->port.tty->low_latency =
+				(info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+		info->port.tty->low_latency = 0;
+		if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
 				(new_serial.baud_base != info->baud_base ||
 				new_serial.custom_divisor !=
 				info->custom_divisor)) {
 			baud = new_serial.baud_base / new_serial.custom_divisor;
-			tty_encode_baud_rate(info->tty, baud, baud);
+			tty_encode_baud_rate(info->port.tty, baud, baud);
 		}
 	}
 
@@ -1437,8 +1432,8 @@ static int mxser_set_serial_info(struct mxser_port *info,
 
 	process_txrx_fifo(info);
 
-	if (info->flags & ASYNC_INITIALIZED) {
-		if (flags != (info->flags & ASYNC_SPD_MASK)) {
+	if (info->port.flags & ASYNC_INITIALIZED) {
+		if (flags != (info->port.flags & ASYNC_SPD_MASK)) {
 			spin_lock_irqsave(&info->slock, sl_flags);
 			mxser_change_speed(info, NULL);
 			spin_unlock_irqrestore(&info->slock, sl_flags);
@@ -1693,12 +1688,12 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
 					continue;
 				}
 
-				if (!port->tty || !port->tty->termios)
+				if (!port->port.tty || !port->port.tty->termios)
 					GMStatus[i].cflag =
 						port->normal_termios.c_cflag;
 				else
 					GMStatus[i].cflag =
-						port->tty->termios->c_cflag;
+						port->port.tty->termios->c_cflag;
 
 				status = inb(port->ioaddr + UART_MSR);
 				if (status & 0x80 /*UART_MSR_DCD */ )
@@ -1755,14 +1750,14 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
 				mon_data_ext.modem_status[i] =
 					port->mon_data.modem_status;
 				mon_data_ext.baudrate[i] =
-					tty_get_baud_rate(port->tty);
+					tty_get_baud_rate(port->port.tty);
 
-				if (!port->tty || !port->tty->termios) {
+				if (!port->port.tty || !port->port.tty->termios) {
 					cflag = port->normal_termios.c_cflag;
 					iflag = port->normal_termios.c_iflag;
 				} else {
-					cflag = port->tty->termios->c_cflag;
-					iflag = port->tty->termios->c_iflag;
+					cflag = port->port.tty->termios->c_cflag;
+					iflag = port->port.tty->termios->c_iflag;
 				}
 
 				mon_data_ext.databits[i] = cflag & CSIZE;
@@ -1989,7 +1984,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
 		else
 			info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
 
-		if (info->tty->hw_stopped)
+		if (info->port.tty->hw_stopped)
 			info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
 		else
 			info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
@@ -2038,7 +2033,7 @@ static void mxser_stoprx(struct tty_struct *tty)
 		}
 	}
 
-	if (info->tty->termios->c_cflag & CRTSCTS) {
+	if (info->port.tty->termios->c_cflag & CRTSCTS) {
 		info->MCR &= ~UART_MCR_RTS;
 		outb(info->MCR, info->ioaddr + UART_MCR);
 	}
@@ -2075,7 +2070,7 @@ static void mxser_unthrottle(struct tty_struct *tty)
 		}
 	}
 
-	if (info->tty->termios->c_cflag & CRTSCTS) {
+	if (info->port.tty->termios->c_cflag & CRTSCTS) {
 		info->MCR |= UART_MCR_RTS;
 		outb(info->MCR, info->ioaddr + UART_MCR);
 	}
@@ -2106,7 +2101,7 @@ static void mxser_start(struct tty_struct *tty)
 	unsigned long flags;
 
 	spin_lock_irqsave(&info->slock, flags);
-	if (info->xmit_cnt && info->xmit_buf) {
+	if (info->xmit_cnt && info->port.xmit_buf) {
 		outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
 		info->IER |= UART_IER_THRI;
 		outb(info->IER, info->ioaddr + UART_IER);
@@ -2220,10 +2215,10 @@ static void mxser_hangup(struct tty_struct *tty)
 	mxser_flush_buffer(tty);
 	mxser_shutdown(info);
 	info->event = 0;
-	info->count = 0;
-	info->flags &= ~ASYNC_NORMAL_ACTIVE;
-	info->tty = NULL;
-	wake_up_interruptible(&info->open_wait);
+	info->port.count = 0;
+	info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
+	info->port.tty = NULL;
+	wake_up_interruptible(&info->port.open_wait);
 }
 
 /*
@@ -2246,7 +2241,7 @@ static void mxser_rs_break(struct tty_struct *tty, int break_state)
 
 static void mxser_receive_chars(struct mxser_port *port, int *status)
 {
-	struct tty_struct *tty = port->tty;
+	struct tty_struct *tty = port->port.tty;
 	unsigned char ch, gdl;
 	int ignored = 0;
 	int cnt = 0;
@@ -2302,7 +2297,7 @@ intr_old:
 					flag = TTY_BREAK;
 					port->icount.brk++;
 
-					if (port->flags & ASYNC_SAK)
+					if (port->port.flags & ASYNC_SAK)
 						do_SAK(tty);
 				} else if (*status & UART_LSR_PE) {
 					flag = TTY_PARITY;
@@ -2333,7 +2328,7 @@ intr_old:
 	} while (*status & UART_LSR_DR);
 
 end_intr:
-	mxvar_log.rxcnt[port->tty->index] += cnt;
+	mxvar_log.rxcnt[port->port.tty->index] += cnt;
 	port->mon_data.rxcnt += cnt;
 	port->mon_data.up_rxcnt += cnt;
 
@@ -2354,18 +2349,18 @@ static void mxser_transmit_chars(struct mxser_port *port)
 	if (port->x_char) {
 		outb(port->x_char, port->ioaddr + UART_TX);
 		port->x_char = 0;
-		mxvar_log.txcnt[port->tty->index]++;
+		mxvar_log.txcnt[port->port.tty->index]++;
 		port->mon_data.txcnt++;
 		port->mon_data.up_txcnt++;
 		port->icount.tx++;
 		return;
 	}
 
-	if (port->xmit_buf == NULL)
+	if (port->port.xmit_buf == NULL)
 		return;
 
-	if ((port->xmit_cnt <= 0) || port->tty->stopped ||
-			(port->tty->hw_stopped &&
+	if ((port->xmit_cnt <= 0) || port->port.tty->stopped ||
+			(port->port.tty->hw_stopped &&
 			(port->type != PORT_16550A) &&
 			(!port->board->chip_flag))) {
 		port->IER &= ~UART_IER_THRI;
@@ -2376,20 +2371,20 @@ static void mxser_transmit_chars(struct mxser_port *port)
 	cnt = port->xmit_cnt;
 	count = port->xmit_fifo_size;
 	do {
-		outb(port->xmit_buf[port->xmit_tail++],
+		outb(port->port.xmit_buf[port->xmit_tail++],
 			port->ioaddr + UART_TX);
 		port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
 		if (--port->xmit_cnt <= 0)
 			break;
 	} while (--count > 0);
-	mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
+	mxvar_log.txcnt[port->port.tty->index] += (cnt - port->xmit_cnt);
 
 	port->mon_data.txcnt += (cnt - port->xmit_cnt);
 	port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
 	port->icount.tx += (cnt - port->xmit_cnt);
 
 	if (port->xmit_cnt < WAKEUP_CHARS)
-		tty_wakeup(port->tty);
+		tty_wakeup(port->port.tty);
 
 	if (port->xmit_cnt <= 0) {
 		port->IER &= ~UART_IER_THRI;
@@ -2440,9 +2435,9 @@ static irqreturn_t mxser_interrupt(int irq, void *dev_id)
 				if (iir & UART_IIR_NO_INT)
 					break;
 				iir &= MOXA_MUST_IIR_MASK;
-				if (!port->tty ||
-						(port->flags & ASYNC_CLOSING) ||
-						!(port->flags &
+				if (!port->port.tty ||
+						(port->port.flags & ASYNC_CLOSING) ||
+						!(port->port.flags &
 							ASYNC_INITIALIZED)) {
 					status = inb(port->ioaddr + UART_LSR);
 					outb(0x27, port->ioaddr + UART_FCR);
@@ -2558,7 +2553,7 @@ static int __devinit mxser_initbrd(struct mxser_board *brd,
 		if (brd->chip_flag != MOXA_OTHER_UART)
 			mxser_enable_must_enchance_mode(info->ioaddr);
 
-		info->flags = ASYNC_SHARE_IRQ;
+		info->port.flags = ASYNC_SHARE_IRQ;
 		info->type = brd->uart_type;
 
 		process_txrx_fifo(info);
@@ -2567,7 +2562,7 @@ static int __devinit mxser_initbrd(struct mxser_board *brd,
 		info->close_delay = 5 * HZ / 10;
 		info->closing_wait = 30 * HZ;
 		info->normal_termios = mxvar_sdriver->init_termios;
-		init_waitqueue_head(&info->open_wait);
+		tty_port_init(&info->port);
 		init_waitqueue_head(&info->delta_msr_wait);
 		memset(&info->mon_data, 0, sizeof(struct mxser_mon));
 		info->err_shadow = 0;