Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6

* 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (48 commits) serial: 8250_pci: add support for Cronyx Omega PCI multiserial board. tty/serial: Fix break handling for PORT_TEGRA tty/serial: Add explicit PORT_TEGRA type n_tracerouter and n_tracesink ldisc additions. Intel PTI implementaiton of MIPI 1149.7. Kernel documentation for the PTI feature. export kernel call get_task_comm(). tty: Remove to support serial for S5P6442 pch_phub: Support new device ML7223 8250_pci: Add support for the Digi/IBM PCIe 2-port Adapter ASoC: Update cx20442 for TTY API change pch_uart: Support new device ML7223 IOH parport: Use request_muxed_region for IT87 probe and lock tty/serial: add support for Xilinx PS UART n_gsm: Use print_hex_dump_bytes drivers/tty/moxa.c: Put correct tty value TTY: tty_io, annotate locking functions TTY: serial_core, remove superfluous set_task_state TTY: serial_core, remove invalid test Char: moxa, fix locking in moxa_write ... Fix up trivial conflicts in drivers/bluetooth/hci_ldisc.c and drivers/tty/serial/Makefile. I did the hci_ldisc thing as an evil merge, cleaning things up.
author: Linus Torvalds 2011-05-23 12:23:20 -0700
committer: Linus Torvalds 2011-05-23 12:23:20 -0700
commit: 99dff5856220a02b8711f2e8746413ea6e53ccf6 (patch)
tree: d8bae7ccdf8f7ad5221b053bb74a6220df996b3a /drivers/tty
parent: bb74e8ca352eecefdc5c1a9ebab01f18aa2f6f3c (diff)
parent: d9a0fbfd7bc5d2c42f0fa9bcbdab62c4942d0388 (diff)
77 files changed, 1975 insertions, 435 deletions
diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig
index 3fd7199301b6..bd7cc0527999 100644
--- a/drivers/tty/Kconfig
+++ b/drivers/tty/Kconfig
@@ -319,3 +319,34 @@ config N_GSM
 	  This line discipline provides support for the GSM MUX protocol and
 	  presents the mux as a set of 61 individual tty devices.
 
+config TRACE_ROUTER
+	tristate "Trace data router for MIPI P1149.7 cJTAG standard"
+	depends on TRACE_SINK
+	default n
+	help
+	  The trace router uses the Linux tty line discipline framework to
+	  route trace data coming from a tty port (say UART for example) to
+	  the trace sink line discipline driver and to another tty port (say
+	  USB). This is part of a solution for the MIPI P1149.7, compact JTAG,
+	  standard, which is for debugging mobile devices. The PTI driver in
+	  drivers/misc/pti.c defines the majority of this MIPI solution.
+
+	  You should select this driver if the target kernel is meant for
+	  a mobile device containing a modem.  Then you will need to select
+	  "Trace data sink for MIPI P1149.7 cJTAG standard" line discipline
+	  driver.
+
+config TRACE_SINK
+	tristate "Trace data sink for MIPI P1149.7 cJTAG standard"
+	default n
+	help
+	  The trace sink uses the Linux line discipline framework to receive
+	  trace data coming from the trace router line discipline driver
+	  to a user-defined tty port target, like USB.
+	  This is to provide a way to extract modem trace data on
+	  devices that do not have a PTI HW module, or just need modem
+	  trace data to come out of a different HW output port.
+	  This is part of a solution for the P1149.7, compact JTAG, standard.
+
+	  If you select this option, you need to select
+	  "Trace data router for MIPI P1149.7 cJTAG standard".
diff --git a/drivers/tty/Makefile b/drivers/tty/Makefile
index 690522fcb338..ea89b0bd15fe 100644
--- a/drivers/tty/Makefile
+++ b/drivers/tty/Makefile
@@ -6,6 +6,8 @@ obj-$(CONFIG_AUDIT)		+= tty_audit.o
 obj-$(CONFIG_MAGIC_SYSRQ)	+= sysrq.o
 obj-$(CONFIG_N_HDLC)		+= n_hdlc.o
 obj-$(CONFIG_N_GSM)		+= n_gsm.o
+obj-$(CONFIG_TRACE_ROUTER)	+= n_tracerouter.o
+obj-$(CONFIG_TRACE_SINK)	+= n_tracesink.o
 obj-$(CONFIG_R3964)		+= n_r3964.o
 
 obj-y				+= vt/
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index f214e5022472..220579592c20 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/amiserial.c
- *
  * Serial driver for the amiga builtin port.
  *
  * This code was created by taking serial.c version 4.30 from kernel
diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
index c99728f0cd9f..bfa05e801823 100644
--- a/drivers/tty/cyclades.c
+++ b/drivers/tty/cyclades.c
@@ -3,8 +3,6 @@
 #undef	Z_EXT_CHARS_IN_BUFFER
 
 /*
- *  linux/drivers/char/cyclades.c
- *
  * This file contains the driver for the Cyclades async multiport
  * serial boards.
  *
@@ -1445,13 +1443,11 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
 {
 	struct cyclades_card *card;
 	unsigned long flags;
-	int channel;
 
 	if (!(info->port.flags & ASYNC_INITIALIZED))
 		return;
 
 	card = info->card;
-	channel = info->line - card->first_line;
 	if (!cy_is_Z(card)) {
 		spin_lock_irqsave(&card->card_lock, flags);
 
@@ -1476,6 +1472,7 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
 		spin_unlock_irqrestore(&card->card_lock, flags);
 	} else {
 #ifdef CY_DEBUG_OPEN
+		int channel = info->line - card->first_line;
 		printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
 			"base_addr %p\n", card, channel, card->base_addr);
 #endif
diff --git a/drivers/tty/ipwireless/Makefile b/drivers/tty/ipwireless/Makefile
index db80873d7f20..fe2e1730986b 100644
--- a/drivers/tty/ipwireless/Makefile
+++ b/drivers/tty/ipwireless/Makefile
@@ -1,6 +1,4 @@
 #
-# drivers/char/pcmcia/ipwireless/Makefile
-#
 # Makefile for the IPWireless driver
 #
 
diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index 35b0c38590e6..ba679ce0a774 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -371,7 +371,7 @@ static int moxa_ioctl(struct tty_struct *tty,
 					tmp.cflag = p->cflag;
 				else
 					tmp.cflag = ttyp->termios->c_cflag;
-				tty_kref_put(tty);
+				tty_kref_put(ttyp);
 copy:
 				if (copy_to_user(argm, &tmp, sizeof(tmp)))
 					return -EFAULT;
@@ -1129,7 +1129,6 @@ static void moxa_shutdown(struct tty_port *port)
 	struct moxa_port *ch = container_of(port, struct moxa_port, port);
         MoxaPortDisable(ch);
 	MoxaPortFlushData(ch, 2);
-	clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
 }
 
 static int moxa_carrier_raised(struct tty_port *port)
@@ -1155,7 +1154,6 @@ static int moxa_open(struct tty_struct *tty, struct file *filp)
 	struct moxa_board_conf *brd;
 	struct moxa_port *ch;
 	int port;
-	int retval;
 
 	port = tty->index;
 	if (port == MAX_PORTS) {
@@ -1190,10 +1188,7 @@ static int moxa_open(struct tty_struct *tty, struct file *filp)
 	mutex_unlock(&ch->port.mutex);
 	mutex_unlock(&moxa_openlock);
 
-	retval = tty_port_block_til_ready(&ch->port, tty, filp);
-	if (retval == 0)
-	        set_bit(ASYNCB_NORMAL_ACTIVE, &ch->port.flags);
-	return retval;
+	return tty_port_block_til_ready(&ch->port, tty, filp);
 }
 
 static void moxa_close(struct tty_struct *tty, struct file *filp)
@@ -1207,14 +1202,15 @@ static int moxa_write(struct tty_struct *tty,
 		      const unsigned char *buf, int count)
 {
 	struct moxa_port *ch = tty->driver_data;
+	unsigned long flags;
 	int len;
 
 	if (ch == NULL)
 		return 0;
 
-	spin_lock_bh(&moxa_lock);
+	spin_lock_irqsave(&moxa_lock, flags);
 	len = MoxaPortWriteData(tty, buf, count);
-	spin_unlock_bh(&moxa_lock);
+	spin_unlock_irqrestore(&moxa_lock, flags);
 
 	set_bit(LOWWAIT, &ch->statusflags);
 	return len;
@@ -1281,10 +1277,8 @@ static int moxa_tiocmset(struct tty_struct *tty,
 			 unsigned int set, unsigned int clear)
 {
 	struct moxa_port *ch;
-	int port;
 	int dtr, rts;
 
-	port = tty->index;
 	mutex_lock(&moxa_openlock);
 	ch = tty->driver_data;
 	if (!ch) {
@@ -1756,11 +1750,9 @@ static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
 		speed_t baud)
 {
 	void __iomem *ofsAddr;
-	tcflag_t cflag;
 	tcflag_t mode = 0;
 
 	ofsAddr = port->tableAddr;
-	cflag = termio->c_cflag;	/* termio->c_cflag */
 
 	mode = termio->c_cflag & CSIZE;
 	if (mode == CS5)
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 77623b936538..a4c42a75a3bf 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -526,19 +526,6 @@ static int gsm_stuff_frame(const u8 *input, u8 *output, int len)
 	return olen;
 }
 
-static void hex_packet(const unsigned char *p, int len)
-{
-	int i;
-	for (i = 0; i < len; i++) {
-		if (i && (i % 16) == 0) {
-			pr_cont("\n");
-			pr_debug("");
-		}
-		pr_cont("%02X ", *p++);
-	}
-	pr_cont("\n");
-}
-
 /**
  *	gsm_send	-	send a control frame
  *	@gsm: our GSM mux
@@ -685,10 +672,10 @@ static void gsm_data_kick(struct gsm_mux *gsm)
 			len = msg->len + 2;
 		}
 
-		if (debug & 4) {
-			pr_debug("gsm_data_kick:\n");
-			hex_packet(gsm->txframe, len);
-		}
+		if (debug & 4)
+			print_hex_dump_bytes("gsm_data_kick: ",
+					     DUMP_PREFIX_OFFSET,
+					     gsm->txframe, len);
 
 		if (gsm->output(gsm, gsm->txframe + skip_sof,
 						len - skip_sof) < 0)
@@ -2095,10 +2082,9 @@ static int gsmld_output(struct gsm_mux *gsm, u8 *data, int len)
 		set_bit(TTY_DO_WRITE_WAKEUP, &gsm->tty->flags);
 		return -ENOSPC;
 	}
-	if (debug & 4) {
-		pr_debug("-->%d bytes out\n", len);
-		hex_packet(data, len);
-	}
+	if (debug & 4)
+		print_hex_dump_bytes("gsmld_output: ", DUMP_PREFIX_OFFSET,
+				     data, len);
 	gsm->tty->ops->write(gsm->tty, data, len);
 	return len;
 }
@@ -2142,8 +2128,8 @@ static void gsmld_detach_gsm(struct tty_struct *tty, struct gsm_mux *gsm)
 	gsm->tty = NULL;
 }
 
-static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp,
-			      char *fp, int count)
+static unsigned int gsmld_receive_buf(struct tty_struct *tty,
+		const unsigned char *cp, char *fp, int count)
 {
 	struct gsm_mux *gsm = tty->disc_data;
 	const unsigned char *dp;
@@ -2152,10 +2138,9 @@ static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 	char buf[64];
 	char flags;
 
-	if (debug & 4) {
-		pr_debug("Inbytes %dd\n", count);
-		hex_packet(cp, count);
-	}
+	if (debug & 4)
+		print_hex_dump_bytes("gsmld_receive: ", DUMP_PREFIX_OFFSET,
+				     cp, count);
 
 	for (i = count, dp = cp, f = fp; i; i--, dp++) {
 		flags = *f++;
@@ -2177,6 +2162,8 @@ static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 	}
 	/* FASYNC if needed ? */
 	/* If clogged call tty_throttle(tty); */
+
+	return count;
 }
 
 /**
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index cea56033b34c..cac666314aef 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -188,8 +188,8 @@ static unsigned int n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,
 				    poll_table *wait);
 static int n_hdlc_tty_open(struct tty_struct *tty);
 static void n_hdlc_tty_close(struct tty_struct *tty);
-static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *cp,
-			       char *fp, int count);
+static unsigned int n_hdlc_tty_receive(struct tty_struct *tty,
+		const __u8 *cp, char *fp, int count);
 static void n_hdlc_tty_wakeup(struct tty_struct *tty);
 
 #define bset(p,b)	((p)[(b) >> 5] |= (1 << ((b) & 0x1f)))
@@ -509,8 +509,8 @@ static void n_hdlc_tty_wakeup(struct tty_struct *tty)
  * Called by tty low level driver when receive data is available. Data is
  * interpreted as one HDLC frame.
  */
-static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
-			       char *flags, int count)
+static unsigned int n_hdlc_tty_receive(struct tty_struct *tty,
+		const __u8 *data, char *flags, int count)
 {
 	register struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
 	register struct n_hdlc_buf *buf;
@@ -521,20 +521,20 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
 		
 	/* This can happen if stuff comes in on the backup tty */
 	if (!n_hdlc || tty != n_hdlc->tty)
-		return;
+		return -ENODEV;
 		
 	/* verify line is using HDLC discipline */
 	if (n_hdlc->magic != HDLC_MAGIC) {
 		printk("%s(%d) line not using HDLC discipline\n",
 			__FILE__,__LINE__);
-		return;
+		return -EINVAL;
 	}
 	
 	if ( count>maxframe ) {
 		if (debuglevel >= DEBUG_LEVEL_INFO)	
 			printk("%s(%d) rx count>maxframesize, data discarded\n",
 			       __FILE__,__LINE__);
-		return;
+		return -EINVAL;
 	}
 
 	/* get a free HDLC buffer */	
@@ -550,7 +550,7 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
 		if (debuglevel >= DEBUG_LEVEL_INFO)	
 			printk("%s(%d) no more rx buffers, data discarded\n",
 			       __FILE__,__LINE__);
-		return;
+		return -EINVAL;
 	}
 		
 	/* copy received data to HDLC buffer */
@@ -565,6 +565,8 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
 	if (n_hdlc->tty->fasync != NULL)
 		kill_fasync (&n_hdlc->tty->fasync, SIGIO, POLL_IN);
 
+	return count;
+
 }	/* end of n_hdlc_tty_receive() */
 
 /**
diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c
index 5c6c31459a2f..a4bc39c21a43 100644
--- a/drivers/tty/n_r3964.c
+++ b/drivers/tty/n_r3964.c
@@ -139,8 +139,8 @@ static int r3964_ioctl(struct tty_struct *tty, struct file *file,
 static void r3964_set_termios(struct tty_struct *tty, struct ktermios *old);
 static unsigned int r3964_poll(struct tty_struct *tty, struct file *file,
 		struct poll_table_struct *wait);
-static void r3964_receive_buf(struct tty_struct *tty, const unsigned char *cp,
-		char *fp, int count);
+static unsigned int r3964_receive_buf(struct tty_struct *tty,
+		const unsigned char *cp, char *fp, int count);
 
 static struct tty_ldisc_ops tty_ldisc_N_R3964 = {
 	.owner = THIS_MODULE,
@@ -1239,8 +1239,8 @@ static unsigned int r3964_poll(struct tty_struct *tty, struct file *file,
 	return result;
 }
 
-static void r3964_receive_buf(struct tty_struct *tty, const unsigned char *cp,
-			char *fp, int count)
+static unsigned int r3964_receive_buf(struct tty_struct *tty,
+		const unsigned char *cp, char *fp, int count)
 {
 	struct r3964_info *pInfo = tty->disc_data;
 	const unsigned char *p;
@@ -1257,6 +1257,8 @@ static void r3964_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 		}
 
 	}
+
+	return count;
 }
 
 MODULE_LICENSE("GPL");
diff --git a/drivers/tty/n_tracerouter.c b/drivers/tty/n_tracerouter.c
new file mode 100644
index 000000000000..1f063d3aa32f
--- /dev/null
+++ b/drivers/tty/n_tracerouter.c
@@ -0,0 +1,243 @@
+/*
+ *  n_tracerouter.c - Trace data router through tty space
+ *
+ *  Copyright (C) Intel 2011
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This trace router uses the Linux line discipline framework to route
+ * trace data coming from a HW Modem to a PTI (Parallel Trace Module) port.
+ * The solution is not specific to a HW modem and this line disciple can
+ * be used to route any stream of data in kernel space.
+ * This is part of a solution for the P1149.7, compact JTAG, standard.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/ioctl.h>
+#include <linux/tty.h>
+#include <linux/tty_ldisc.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <asm-generic/bug.h>
+#include "n_tracesink.h"
+
+/*
+ * Other ldisc drivers use 65536 which basically means,
+ * 'I can always accept 64k' and flow control is off.
+ * This number is deemed appropriate for this driver.
+ */
+#define RECEIVE_ROOM	65536
+#define DRIVERNAME	"n_tracerouter"
+
+/*
+ * struct to hold private configuration data for this ldisc.
+ * opencalled is used to hold if this ldisc has been opened.
+ * kref_tty holds the tty reference the ldisc sits on top of.
+ */
+struct tracerouter_data {
+	u8 opencalled;
+	struct tty_struct *kref_tty;
+};
+static struct tracerouter_data *tr_data;
+
+/* lock for when tty reference is being used */
+static DEFINE_MUTEX(routelock);
+
+/**
+ * n_tracerouter_open() - Called when a tty is opened by a SW entity.
+ * @tty: terminal device to the ldisc.
+ *
+ * Return:
+ *      0 for success.
+ *
+ * Caveats: This should only be opened one time per SW entity.
+ */
+static int n_tracerouter_open(struct tty_struct *tty)
+{
+	int retval = -EEXIST;
+
+	mutex_lock(&routelock);
+	if (tr_data->opencalled == 0) {
+
+		tr_data->kref_tty = tty_kref_get(tty);
+		if (tr_data->kref_tty == NULL) {
+			retval = -EFAULT;
+		} else {
+			tr_data->opencalled = 1;
+			tty->disc_data      = tr_data;
+			tty->receive_room   = RECEIVE_ROOM;
+			tty_driver_flush_buffer(tty);
+			retval = 0;
+		}
+	}
+	mutex_unlock(&routelock);
+	return retval;
+}
+
+/**
+ * n_tracerouter_close() - close connection
+ * @tty: terminal device to the ldisc.
+ *
+ * Called when a software entity wants to close a connection.
+ */
+static void n_tracerouter_close(struct tty_struct *tty)
+{
+	struct tracerouter_data *tptr = tty->disc_data;
+
+	mutex_lock(&routelock);
+	WARN_ON(tptr->kref_tty != tr_data->kref_tty);
+	tty_driver_flush_buffer(tty);
+	tty_kref_put(tr_data->kref_tty);
+	tr_data->kref_tty = NULL;
+	tr_data->opencalled = 0;
+	tty->disc_data = NULL;
+	mutex_unlock(&routelock);
+}
+
+/**
+ * n_tracerouter_read() - read request from user space
+ * @tty:  terminal device passed into the ldisc.
+ * @file: pointer to open file object.
+ * @buf:  pointer to the data buffer that gets eventually returned.
+ * @nr:   number of bytes of the data buffer that is returned.
+ *
+ * function that allows read() functionality in userspace. By default if this
+ * is not implemented it returns -EIO. This module is functioning like a
+ * router via n_tracerouter_receivebuf(), and there is no real requirement
+ * to implement this function. However, an error return value other than
+ * -EIO should be used just to show that there was an intent not to have
+ * this function implemented.  Return value based on read() man pages.
+ *
+ * Return:
+ *	 -EINVAL
+ */
+static ssize_t n_tracerouter_read(struct tty_struct *tty, struct file *file,
+				  unsigned char __user *buf, size_t nr) {
+	return -EINVAL;
+}
+
+/**
+ * n_tracerouter_write() - Function that allows write() in userspace.
+ * @tty:  terminal device passed into the ldisc.
+ * @file: pointer to open file object.
+ * @buf:  pointer to the data buffer that gets eventually returned.
+ * @nr:   number of bytes of the data buffer that is returned.
+ *
+ * By default if this is not implemented, it returns -EIO.
+ * This should not be implemented, ever, because
+ * 1. this driver is functioning like a router via
+ *    n_tracerouter_receivebuf()
+ * 2. No writes to HW will ever go through this line discpline driver.
+ * However, an error return value other than -EIO should be used
+ * just to show that there was an intent not to have this function
+ * implemented.  Return value based on write() man pages.
+ *
+ * Return:
+ *	-EINVAL
+ */
+static ssize_t n_tracerouter_write(struct tty_struct *tty, struct file *file,
+				   const unsigned char *buf, size_t nr) {
+	return -EINVAL;
+}
+
+/**
+ * n_tracerouter_receivebuf() - Routing function for driver.
+ * @tty: terminal device passed into the ldisc.  It's assumed
+ *       tty will never be NULL.
+ * @cp:  buffer, block of characters to be eventually read by
+ *       someone, somewhere (user read() call or some kernel function).
+ * @fp:  flag buffer.
+ * @count: number of characters (aka, bytes) in cp.
+ *
+ * This function takes the input buffer, cp, and passes it to
+ * an external API function for processing.
+ */
+static void n_tracerouter_receivebuf(struct tty_struct *tty,
+					const unsigned char *cp,
+					char *fp, int count)
+{
+	mutex_lock(&routelock);
+	n_tracesink_datadrain((u8 *) cp, count);
+	mutex_unlock(&routelock);
+}
+
+/*
+ * Flush buffer is not impelemented as the ldisc has no internal buffering
+ * so the tty_driver_flush_buffer() is sufficient for this driver's needs.
+ */
+
+static struct tty_ldisc_ops tty_ptirouter_ldisc = {
+	.owner		= THIS_MODULE,
+	.magic		= TTY_LDISC_MAGIC,
+	.name		= DRIVERNAME,
+	.open		= n_tracerouter_open,
+	.close		= n_tracerouter_close,
+	.read		= n_tracerouter_read,
+	.write		= n_tracerouter_write,
+	.receive_buf	= n_tracerouter_receivebuf
+};
+
+/**
+ * n_tracerouter_init -	module initialisation
+ *
+ * Registers this module as a line discipline driver.
+ *
+ * Return:
+ *	0 for success, any other value error.
+ */
+static int __init n_tracerouter_init(void)
+{
+	int retval;
+
+	tr_data = kzalloc(sizeof(struct tracerouter_data), GFP_KERNEL);
+	if (tr_data == NULL)
+		return -ENOMEM;
+
+
+	/* Note N_TRACEROUTER is defined in linux/tty.h */
+	retval = tty_register_ldisc(N_TRACEROUTER, &tty_ptirouter_ldisc);
+	if (retval < 0) {
+		pr_err("%s: Registration failed: %d\n", __func__, retval);
+		kfree(tr_data);
+	}
+	return retval;
+}
+
+/**
+ * n_tracerouter_exit -	module unload
+ *
+ * Removes this module as a line discipline driver.
+ */
+static void __exit n_tracerouter_exit(void)
+{
+	int retval = tty_unregister_ldisc(N_TRACEROUTER);
+
+	if (retval < 0)
+		pr_err("%s: Unregistration failed: %d\n", __func__,  retval);
+	else
+		kfree(tr_data);
+}
+
+module_init(n_tracerouter_init);
+module_exit(n_tracerouter_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jay Freyensee");
+MODULE_ALIAS_LDISC(N_TRACEROUTER);
+MODULE_DESCRIPTION("Trace router ldisc driver");
diff --git a/drivers/tty/n_tracesink.c b/drivers/tty/n_tracesink.c
new file mode 100644
index 000000000000..ddce58b973d2
--- /dev/null
+++ b/drivers/tty/n_tracesink.c
@@ -0,0 +1,238 @@
+/*
+ *  n_tracesink.c - Trace data router and sink path through tty space.
+ *
+ *  Copyright (C) Intel 2011
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * The trace sink uses the Linux line discipline framework to receive
+ * trace data coming from the PTI source line discipline driver
+ * to a user-desired tty port, like USB.
+ * This is to provide a way to extract modem trace data on
+ * devices that do not have a PTI HW module, or just need modem
+ * trace data to come out of a different HW output port.
+ * This is part of a solution for the P1149.7, compact JTAG, standard.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/ioctl.h>
+#include <linux/tty.h>
+#include <linux/tty_ldisc.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <asm-generic/bug.h>
+#include "n_tracesink.h"
+
+/*
+ * Other ldisc drivers use 65536 which basically means,
+ * 'I can always accept 64k' and flow control is off.
+ * This number is deemed appropriate for this driver.
+ */
+#define RECEIVE_ROOM	65536
+#define DRIVERNAME	"n_tracesink"
+
+/*
+ * there is a quirk with this ldisc is he can write data
+ * to a tty from anyone calling his kernel API, which
+ * meets customer requirements in the drivers/misc/pti.c
+ * project.  So he needs to know when he can and cannot write when
+ * the API is called. In theory, the API can be called
+ * after an init() but before a successful open() which
+ * would crash the system if tty is not checked.
+ */
+static struct tty_struct *this_tty;
+static DEFINE_MUTEX(writelock);
+
+/**
+ * n_tracesink_open() - Called when a tty is opened by a SW entity.
+ * @tty: terminal device to the ldisc.
+ *
+ * Return:
+ *      0 for success,
+ *      -EFAULT = couldn't get a tty kref n_tracesink will sit
+ *       on top of
+ *      -EEXIST = open() called successfully once and it cannot
+ *      be called again.
+ *
+ * Caveats: open() should only be successful the first time a
+ * SW entity calls it.
+ */
+static int n_tracesink_open(struct tty_struct *tty)
+{
+	int retval = -EEXIST;
+
+	mutex_lock(&writelock);
+	if (this_tty == NULL) {
+		this_tty = tty_kref_get(tty);
+		if (this_tty == NULL) {
+			retval = -EFAULT;
+		} else {
+			tty->disc_data = this_tty;
+			tty_driver_flush_buffer(tty);
+			retval = 0;
+		}
+	}
+	mutex_unlock(&writelock);
+
+	return retval;
+}
+
+/**
+ * n_tracesink_close() - close connection
+ * @tty: terminal device to the ldisc.
+ *
+ * Called when a software entity wants to close a connection.
+ */
+static void n_tracesink_close(struct tty_struct *tty)
+{
+	mutex_lock(&writelock);
+	tty_driver_flush_buffer(tty);
+	tty_kref_put(this_tty);
+	this_tty = NULL;
+	tty->disc_data = NULL;
+	mutex_unlock(&writelock);
+}
+
+/**
+ * n_tracesink_read() - read request from user space
+ * @tty:  terminal device passed into the ldisc.
+ * @file: pointer to open file object.
+ * @buf:  pointer to the data buffer that gets eventually returned.
+ * @nr:   number of bytes of the data buffer that is returned.
+ *
+ * function that allows read() functionality in userspace. By default if this
+ * is not implemented it returns -EIO. This module is functioning like a
+ * router via n_tracesink_receivebuf(), and there is no real requirement
+ * to implement this function. However, an error return value other than
+ * -EIO should be used just to show that there was an intent not to have
+ * this function implemented.  Return value based on read() man pages.
+ *
+ * Return:
+ *	 -EINVAL
+ */
+static ssize_t n_tracesink_read(struct tty_struct *tty, struct file *file,
+				unsigned char __user *buf, size_t nr) {
+	return -EINVAL;
+}
+
+/**
+ * n_tracesink_write() - Function that allows write() in userspace.
+ * @tty:  terminal device passed into the ldisc.
+ * @file: pointer to open file object.
+ * @buf:  pointer to the data buffer that gets eventually returned.
+ * @nr:   number of bytes of the data buffer that is returned.
+ *
+ * By default if this is not implemented, it returns -EIO.
+ * This should not be implemented, ever, because
+ * 1. this driver is functioning like a router via
+ *    n_tracesink_receivebuf()
+ * 2. No writes to HW will ever go through this line discpline driver.
+ * However, an error return value other than -EIO should be used
+ * just to show that there was an intent not to have this function
+ * implemented.  Return value based on write() man pages.
+ *
+ * Return:
+ *	-EINVAL
+ */
+static ssize_t n_tracesink_write(struct tty_struct *tty, struct file *file,
+				 const unsigned char *buf, size_t nr) {
+	return -EINVAL;
+}
+
+/**
+ * n_tracesink_datadrain() - Kernel API function used to route
+ *			     trace debugging data to user-defined
+ *			     port like USB.
+ *
+ * @buf:   Trace debuging data buffer to write to tty target
+ *         port. Null value will return with no write occurring.
+ * @count: Size of buf. Value of 0 or a negative number will
+ *         return with no write occuring.
+ *
+ * Caveat: If this line discipline does not set the tty it sits
+ * on top of via an open() call, this API function will not
+ * call the tty's write() call because it will have no pointer
+ * to call the write().
+ */
+void n_tracesink_datadrain(u8 *buf, int count)
+{
+	mutex_lock(&writelock);
+
+	if ((buf != NULL) && (count > 0) && (this_tty != NULL))
+		this_tty->ops->write(this_tty, buf, count);
+
+	mutex_unlock(&writelock);
+}
+EXPORT_SYMBOL_GPL(n_tracesink_datadrain);
+
+/*
+ * Flush buffer is not impelemented as the ldisc has no internal buffering
+ * so the tty_driver_flush_buffer() is sufficient for this driver's needs.
+ */
+
+/*
+ * tty_ldisc function operations for this driver.
+ */
+static struct tty_ldisc_ops tty_n_tracesink = {
+	.owner		= THIS_MODULE,
+	.magic		= TTY_LDISC_MAGIC,
+	.name		= DRIVERNAME,
+	.open		= n_tracesink_open,
+	.close		= n_tracesink_close,
+	.read		= n_tracesink_read,
+	.write		= n_tracesink_write
+};
+
+/**
+ * n_tracesink_init-	module initialisation
+ *
+ * Registers this module as a line discipline driver.
+ *
+ * Return:
+ *	0 for success, any other value error.
+ */
+static int __init n_tracesink_init(void)
+{
+	/* Note N_TRACESINK is defined in linux/tty.h */
+	int retval = tty_register_ldisc(N_TRACESINK, &tty_n_tracesink);
+
+	if (retval < 0)
+		pr_err("%s: Registration failed: %d\n", __func__, retval);
+
+	return retval;
+}
+
+/**
+ * n_tracesink_exit -	module unload
+ *
+ * Removes this module as a line discipline driver.
+ */
+static void __exit n_tracesink_exit(void)
+{
+	int retval = tty_unregister_ldisc(N_TRACESINK);
+
+	if (retval < 0)
+		pr_err("%s: Unregistration failed: %d\n", __func__,  retval);
+}
+
+module_init(n_tracesink_init);
+module_exit(n_tracesink_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jay Freyensee");
+MODULE_ALIAS_LDISC(N_TRACESINK);
+MODULE_DESCRIPTION("Trace sink ldisc driver");
diff --git a/drivers/tty/n_tracesink.h b/drivers/tty/n_tracesink.h
new file mode 100644
index 000000000000..a68bb44f1ef5
--- /dev/null
+++ b/drivers/tty/n_tracesink.h
@@ -0,0 +1,36 @@
+/*
+ *  n_tracesink.h - Kernel driver API to route trace data in kernel space.
+ *
+ *  Copyright (C) Intel 2011
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * The PTI (Parallel Trace Interface) driver directs trace data routed from
+ * various parts in the system out through the Intel Penwell PTI port and
+ * out of the mobile device for analysis with a debugging tool
+ * (Lauterbach, Fido). This is part of a solution for the MIPI P1149.7,
+ * compact JTAG, standard.
+ *
+ * This header file is used by n_tracerouter to be able to send the
+ * data of it's tty port to the tty port this module sits.  This
+ * mechanism can also be used independent of the PTI module.
+ *
+ */
+
+#ifndef N_TRACESINK_H_
+#define N_TRACESINK_H_
+
+void n_tracesink_datadrain(u8 *buf, int count);
+
+#endif
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 0ad32888091c..95d0a9c2dd13 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -81,38 +81,6 @@ static inline int tty_put_user(struct tty_struct *tty, unsigned char x,
 	return put_user(x, ptr);
 }
 
-/**
- *	n_tty_set__room	-	receive space
- *	@tty: terminal
- *
- *	Called by the driver to find out how much data it is
- *	permitted to feed to the line discipline without any being lost
- *	and thus to manage flow control. Not serialized. Answers for the
- *	"instant".
- */
-
-static void n_tty_set_room(struct tty_struct *tty)
-{
-	/* tty->read_cnt is not read locked ? */
-	int	left = N_TTY_BUF_SIZE - tty->read_cnt - 1;
-	int old_left;
-
-	/*
-	 * If we are doing input canonicalization, and there are no
-	 * pending newlines, let characters through without limit, so
-	 * that erase characters will be handled.  Other excess
-	 * characters will be beeped.
-	 */
-	if (left <= 0)
-		left = tty->icanon && !tty->canon_data;
-	old_left = tty->receive_room;
-	tty->receive_room = left;
-
-	/* Did this open up the receive buffer? We may need to flip */
-	if (left && !old_left)
-		schedule_work(&tty->buf.work);
-}
-
 static void put_tty_queue_nolock(unsigned char c, struct tty_struct *tty)
 {
 	if (tty->read_cnt < N_TTY_BUF_SIZE) {
@@ -184,7 +152,6 @@ static void reset_buffer_flags(struct tty_struct *tty)
 
 	tty->canon_head = tty->canon_data = tty->erasing = 0;
 	memset(&tty->read_flags, 0, sizeof tty->read_flags);
-	n_tty_set_room(tty);
 	check_unthrottle(tty);
 }
 
@@ -1360,17 +1327,19 @@ static void n_tty_write_wakeup(struct tty_struct *tty)
  *	calls one at a time and in order (or using flush_to_ldisc)
  */
 
-static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
-			      char *fp, int count)
+static unsigned int n_tty_receive_buf(struct tty_struct *tty,
+		const unsigned char *cp, char *fp, int count)
 {
 	const unsigned char *p;
 	char *f, flags = TTY_NORMAL;
 	int	i;
 	char	buf[64];
 	unsigned long cpuflags;
+	int left;
+	int ret = 0;
 
 	if (!tty->read_buf)
-		return;
+		return 0;
 
 	if (tty->real_raw) {
 		spin_lock_irqsave(&tty->read_lock, cpuflags);
@@ -1380,6 +1349,7 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 		memcpy(tty->read_buf + tty->read_head, cp, i);
 		tty->read_head = (tty->read_head + i) & (N_TTY_BUF_SIZE-1);
 		tty->read_cnt += i;
+		ret += i;
 		cp += i;
 		count -= i;
 
@@ -1389,8 +1359,10 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 		memcpy(tty->read_buf + tty->read_head, cp, i);
 		tty->read_head = (tty->read_head + i) & (N_TTY_BUF_SIZE-1);
 		tty->read_cnt += i;
+		ret += i;
 		spin_unlock_irqrestore(&tty->read_lock, cpuflags);
 	} else {
+		ret = count;
 		for (i = count, p = cp, f = fp; i; i--, p++) {
 			if (f)
 				flags = *f++;
@@ -1418,8 +1390,6 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 			tty->ops->flush_chars(tty);
 	}
 
-	n_tty_set_room(tty);
-
 	if ((!tty->icanon && (tty->read_cnt >= tty->minimum_to_wake)) ||
 		L_EXTPROC(tty)) {
 		kill_fasync(&tty->fasync, SIGIO, POLL_IN);
@@ -1432,8 +1402,12 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 	 * mode.  We don't want to throttle the driver if we're in
 	 * canonical mode and don't have a newline yet!
 	 */
-	if (tty->receive_room < TTY_THRESHOLD_THROTTLE)
+	left = N_TTY_BUF_SIZE - tty->read_cnt - 1;
+
+	if (left < TTY_THRESHOLD_THROTTLE)
 		tty_throttle(tty);
+
+	return ret;
 }
 
 int is_ignored(int sig)
@@ -1477,7 +1451,6 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
 	if (test_bit(TTY_HW_COOK_IN, &tty->flags)) {
 		tty->raw = 1;
 		tty->real_raw = 1;
-		n_tty_set_room(tty);
 		return;
 	}
 	if (I_ISTRIP(tty) || I_IUCLC(tty) || I_IGNCR(tty) ||
@@ -1530,7 +1503,6 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
 		else
 			tty->real_raw = 0;
 	}
-	n_tty_set_room(tty);
 	/* The termios change make the tty ready for I/O */
 	wake_up_interruptible(&tty->write_wait);
 	wake_up_interruptible(&tty->read_wait);
@@ -1812,8 +1784,6 @@ do_it_again:
 				retval = -ERESTARTSYS;
 				break;
 			}
-			/* FIXME: does n_tty_set_room need locking ? */
-			n_tty_set_room(tty);
 			timeout = schedule_timeout(timeout);
 			continue;
 		}
@@ -1885,10 +1855,8 @@ do_it_again:
 		 * longer than TTY_THRESHOLD_UNTHROTTLE in canonical mode,
 		 * we won't get any more characters.
 		 */
-		if (n_tty_chars_in_buffer(tty) <= TTY_THRESHOLD_UNTHROTTLE) {
-			n_tty_set_room(tty);
+		if (n_tty_chars_in_buffer(tty) <= TTY_THRESHOLD_UNTHROTTLE)
 			check_unthrottle(tty);
-		}
 
 		if (b - buf >= minimum)
 			break;
@@ -1910,7 +1878,6 @@ do_it_again:
 	} else if (test_and_clear_bit(TTY_PUSH, &tty->flags))
 		 goto do_it_again;
 
-	n_tty_set_room(tty);
 	return retval;
 }
 
diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
index fd0a98524d51..b1aecc7bb32a 100644
--- a/drivers/tty/nozomi.c
+++ b/drivers/tty/nozomi.c
@@ -364,8 +364,6 @@ struct port {
 	u8 toggle_ul;
 	u16 token_dl;
 
-	/* mutex to ensure one access patch to this port */
-	struct mutex tty_sem;
 	wait_queue_head_t tty_wait;
 	struct async_icount tty_icount;
 
@@ -1431,8 +1429,8 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
 	}
 
 	for (i = PORT_MDM; i < MAX_PORT; i++) {
-		if (kfifo_alloc(&dc->port[i].fifo_ul,
-		      FIFO_BUFFER_SIZE_UL, GFP_ATOMIC)) {
+		if (kfifo_alloc(&dc->port[i].fifo_ul, FIFO_BUFFER_SIZE_UL,
+					GFP_KERNEL)) {
 			dev_err(&pdev->dev,
 					"Could not allocate kfifo buffer\n");
 			ret = -ENOMEM;
@@ -1474,7 +1472,6 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
 		struct device *tty_dev;
 		struct port *port = &dc->port[i];
 		port->dc = dc;
-		mutex_init(&port->tty_sem);
 		tty_port_init(&port->port);
 		port->port.ops = &noz_tty_port_ops;
 		tty_dev = tty_register_device(ntty_driver, dc->index_start + i,
@@ -1688,13 +1685,6 @@ static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
 	if (!dc || !port)
 		return -ENODEV;
 
-	mutex_lock(&port->tty_sem);
-
-	if (unlikely(!port->port.count)) {
-		DBG1(" ");
-		goto exit;
-	}
-
 	rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count);
 
 	/* notify card */
@@ -1719,7 +1709,6 @@ static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
 	spin_unlock_irqrestore(&dc->spin_mutex, flags);
 
 exit:
-	mutex_unlock(&port->tty_sem);
 	return rval;
 }
 
@@ -1738,12 +1727,9 @@ static int ntty_write_room(struct tty_struct *tty)
 	int room = 4096;
 	const struct nozomi *dc = get_dc_by_tty(tty);
 
-	if (dc) {
-		mutex_lock(&port->tty_sem);
-		if (port->port.count)
-			room = kfifo_avail(&port->fifo_ul);
-		mutex_unlock(&port->tty_sem);
-	}
+	if (dc)
+		room = kfifo_avail(&port->fifo_ul);
+
 	return room;
 }
 
@@ -1889,11 +1875,6 @@ static s32 ntty_chars_in_buffer(struct tty_struct *tty)
 		goto exit_in_buffer;
 	}
 
-	if (unlikely(!port->port.count)) {
-		dev_err(&dc->pdev->dev, "No tty open?\n");
-		goto exit_in_buffer;
-	}
-
 	rval = kfifo_len(&port->fifo_ul);
 
 exit_in_buffer:
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 210774726add..98b6e3bdb000 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/pty.c
- *
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *
  *  Added support for a Unix98-style ptmx device.
@@ -295,8 +293,8 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty)
 		return -ENOMEM;
 	if (!try_module_get(driver->other->owner)) {
 		/* This cannot in fact currently happen */
-		free_tty_struct(o_tty);
-		return -ENOMEM;
+		retval = -ENOMEM;
+		goto err_free_tty;
 	}
 	initialize_tty_struct(o_tty, driver->other, idx);
 
@@ -304,13 +302,11 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty)
 	   the easy way .. */
 	retval = tty_init_termios(tty);
 	if (retval)
-		goto free_mem_out;
+		goto err_deinit_tty;
 
 	retval = tty_init_termios(o_tty);
-	if (retval) {
-		tty_free_termios(tty);
-		goto free_mem_out;
-	}
+	if (retval)
+		goto err_free_termios;
 
 	/*
 	 * Everything allocated ... set up the o_tty structure.
@@ -327,10 +323,14 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty)
 	tty->count++;
 	driver->ttys[idx] = tty;
 	return 0;
-free_mem_out:
+err_free_termios:
+	tty_free_termios(tty);
+err_deinit_tty:
+	deinitialize_tty_struct(o_tty);
 	module_put(o_tty->driver->owner);
+err_free_tty:
 	free_tty_struct(o_tty);
-	return -ENOMEM;
+	return retval;
 }
 
 static int pty_bsd_ioctl(struct tty_struct *tty,
@@ -559,20 +559,19 @@ static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty)
 		return -ENOMEM;
 	if (!try_module_get(driver->other->owner)) {
 		/* This cannot in fact currently happen */
-		free_tty_struct(o_tty);
-		return -ENOMEM;
+		goto err_free_tty;
 	}
 	initialize_tty_struct(o_tty, driver->other, idx);
 
 	tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL);
 	if (tty->termios == NULL)
-		goto free_mem_out;
+		goto err_free_mem;
 	*tty->termios = driver->init_termios;
 	tty->termios_locked = tty->termios + 1;
 
 	o_tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL);
 	if (o_tty->termios == NULL)
-		goto free_mem_out;
+		goto err_free_mem;
 	*o_tty->termios = driver->other->init_termios;
 	o_tty->termios_locked = o_tty->termios + 1;
 
@@ -591,11 +590,13 @@ static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty)
 	tty->count++;
 	pty_count++;
 	return 0;
-free_mem_out:
+err_free_mem:
+	deinitialize_tty_struct(o_tty);
 	kfree(o_tty->termios);
+	kfree(tty->termios);
 	module_put(o_tty->driver->owner);
+err_free_tty:
 	free_tty_struct(o_tty);
-	kfree(tty->termios);
 	return -ENOMEM;
 }
 
diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c
index 036feeb5e3f6..13043e8d37fe 100644
--- a/drivers/tty/rocket.c
+++ b/drivers/tty/rocket.c
@@ -1380,7 +1380,6 @@ static void rp_send_xchar(struct tty_struct *tty, char ch)
 static void rp_throttle(struct tty_struct *tty)
 {
 	struct r_port *info = tty->driver_data;
-	CHANNEL_t *cp;
 
 #ifdef ROCKET_DEBUG_THROTTLE
 	printk(KERN_INFO "throttle %s: %d....\n", tty->name,
@@ -1390,7 +1389,6 @@ static void rp_throttle(struct tty_struct *tty)
 	if (rocket_paranoia_check(info, "rp_throttle"))
 		return;
 
-	cp = &info->channel;
 	if (I_IXOFF(tty))
 		rp_send_xchar(tty, STOP_CHAR(tty));
 
@@ -1400,7 +1398,6 @@ static void rp_throttle(struct tty_struct *tty)
 static void rp_unthrottle(struct tty_struct *tty)
 {
 	struct r_port *info = tty->driver_data;
-	CHANNEL_t *cp;
 #ifdef ROCKET_DEBUG_THROTTLE
 	printk(KERN_INFO "unthrottle %s: %d....\n", tty->name,
 	       tty->ldisc.chars_in_buffer(tty));
@@ -1409,7 +1406,6 @@ static void rp_unthrottle(struct tty_struct *tty)
 	if (rocket_paranoia_check(info, "rp_throttle"))
 		return;
 
-	cp = &info->channel;
 	if (I_IXOFF(tty))
 		rp_send_xchar(tty, START_CHAR(tty));
 
@@ -1722,13 +1718,10 @@ static int rp_write_room(struct tty_struct *tty)
 static int rp_chars_in_buffer(struct tty_struct *tty)
 {
 	struct r_port *info = tty->driver_data;
-	CHANNEL_t *cp;
 
 	if (rocket_paranoia_check(info, "rp_chars_in_buffer"))
 		return 0;
 
-	cp = &info->channel;
-
 #ifdef ROCKET_DEBUG_WRITE
 	printk(KERN_INFO "rp_chars_in_buffer returns %d...\n", info->xmit_cnt);
 #endif
@@ -1779,7 +1772,6 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 {
 	int num_aiops, aiop, max_num_aiops, num_chan, chan;
 	unsigned int aiopio[MAX_AIOPS_PER_BOARD];
-	char *str, *board_type;
 	CONTROLLER_t *ctlp;
 
 	int fast_clock = 0;
@@ -1800,7 +1792,6 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 	/*  Depending on the model, set up some config variables */
 	switch (dev->device) {
 	case PCI_DEVICE_ID_RP4QUAD:
-		str = "Quadcable";
 		max_num_aiops = 1;
 		ports_per_aiop = 4;
 		rocketModel[i].model = MODEL_RP4QUAD;
@@ -1808,42 +1799,36 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 		rocketModel[i].numPorts = 4;
 		break;
 	case PCI_DEVICE_ID_RP8OCTA:
-		str = "Octacable";
 		max_num_aiops = 1;
 		rocketModel[i].model = MODEL_RP8OCTA;
 		strcpy(rocketModel[i].modelString, "RocketPort 8 port w/octa cable");
 		rocketModel[i].numPorts = 8;
 		break;
 	case PCI_DEVICE_ID_URP8OCTA:
-		str = "Octacable";
 		max_num_aiops = 1;
 		rocketModel[i].model = MODEL_UPCI_RP8OCTA;
 		strcpy(rocketModel[i].modelString, "RocketPort UPCI 8 port w/octa cable");
 		rocketModel[i].numPorts = 8;
 		break;
 	case PCI_DEVICE_ID_RP8INTF:
-		str = "8";
 		max_num_aiops = 1;
 		rocketModel[i].model = MODEL_RP8INTF;
 		strcpy(rocketModel[i].modelString, "RocketPort 8 port w/external I/F");
 		rocketModel[i].numPorts = 8;
 		break;
 	case PCI_DEVICE_ID_URP8INTF:
-		str = "8";
 		max_num_aiops = 1;
 		rocketModel[i].model = MODEL_UPCI_RP8INTF;
 		strcpy(rocketModel[i].modelString, "RocketPort UPCI 8 port w/external I/F");
 		rocketModel[i].numPorts = 8;
 		break;
 	case PCI_DEVICE_ID_RP8J:
-		str = "8J";
 		max_num_aiops = 1;
 		rocketModel[i].model = MODEL_RP8J;
 		strcpy(rocketModel[i].modelString, "RocketPort 8 port w/RJ11 connectors");
 		rocketModel[i].numPorts = 8;
 		break;
 	case PCI_DEVICE_ID_RP4J:
-		str = "4J";
 		max_num_aiops = 1;
 		ports_per_aiop = 4;
 		rocketModel[i].model = MODEL_RP4J;
@@ -1851,56 +1836,48 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 		rocketModel[i].numPorts = 4;
 		break;
 	case PCI_DEVICE_ID_RP8SNI:
-		str = "8 (DB78 Custom)";
 		max_num_aiops = 1;
 		rocketModel[i].model = MODEL_RP8SNI;
 		strcpy(rocketModel[i].modelString, "RocketPort 8 port w/ custom DB78");
 		rocketModel[i].numPorts = 8;
 		break;
 	case PCI_DEVICE_ID_RP16SNI:
-		str = "16 (DB78 Custom)";
 		max_num_aiops = 2;
 		rocketModel[i].model = MODEL_RP16SNI;
 		strcpy(rocketModel[i].modelString, "RocketPort 16 port w/ custom DB78");
 		rocketModel[i].numPorts = 16;
 		break;
 	case PCI_DEVICE_ID_RP16INTF:
-		str = "16";
 		max_num_aiops = 2;
 		rocketModel[i].model = MODEL_RP16INTF;
 		strcpy(rocketModel[i].modelString, "RocketPort 16 port w/external I/F");
 		rocketModel[i].numPorts = 16;
 		break;
 	case PCI_DEVICE_ID_URP16INTF:
-		str = "16";
 		max_num_aiops = 2;
 		rocketModel[i].model = MODEL_UPCI_RP16INTF;
 		strcpy(rocketModel[i].modelString, "RocketPort UPCI 16 port w/external I/F");
 		rocketModel[i].numPorts = 16;
 		break;
 	case PCI_DEVICE_ID_CRP16INTF:
-		str = "16";
 		max_num_aiops = 2;
 		rocketModel[i].model = MODEL_CPCI_RP16INTF;
 		strcpy(rocketModel[i].modelString, "RocketPort Compact PCI 16 port w/external I/F");
 		rocketModel[i].numPorts = 16;
 		break;
 	case PCI_DEVICE_ID_RP32INTF:
-		str = "32";
 		max_num_aiops = 4;
 		rocketModel[i].model = MODEL_RP32INTF;
 		strcpy(rocketModel[i].modelString, "RocketPort 32 port w/external I/F");
 		rocketModel[i].numPorts = 32;
 		break;
 	case PCI_DEVICE_ID_URP32INTF:
-		str = "32";
 		max_num_aiops = 4;
 		rocketModel[i].model = MODEL_UPCI_RP32INTF;
 		strcpy(rocketModel[i].modelString, "RocketPort UPCI 32 port w/external I/F");
 		rocketModel[i].numPorts = 32;
 		break;
 	case PCI_DEVICE_ID_RPP4:
-		str = "Plus Quadcable";
 		max_num_aiops = 1;
 		ports_per_aiop = 4;
 		altChanRingIndicator++;
@@ -1910,7 +1887,6 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 		rocketModel[i].numPorts = 4;
 		break;
 	case PCI_DEVICE_ID_RPP8:
-		str = "Plus Octacable";
 		max_num_aiops = 2;
 		ports_per_aiop = 4;
 		altChanRingIndicator++;
@@ -1920,7 +1896,6 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 		rocketModel[i].numPorts = 8;
 		break;
 	case PCI_DEVICE_ID_RP2_232:
-		str = "Plus 2 (RS-232)";
 		max_num_aiops = 1;
 		ports_per_aiop = 2;
 		altChanRingIndicator++;
@@ -1930,7 +1905,6 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 		rocketModel[i].numPorts = 2;
 		break;
 	case PCI_DEVICE_ID_RP2_422:
-		str = "Plus 2 (RS-422)";
 		max_num_aiops = 1;
 		ports_per_aiop = 2;
 		altChanRingIndicator++;
@@ -1943,7 +1917,6 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 
 		max_num_aiops = 1;
 		ports_per_aiop = 6;
-		str = "6-port";
 
 		/*  If revision is 1, the rocketmodem flash must be loaded.
 		 *  If it is 2 it is a "socketed" version. */
@@ -1961,7 +1934,6 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 	case PCI_DEVICE_ID_RP4M:
 		max_num_aiops = 1;
 		ports_per_aiop = 4;
-		str = "4-port";
 		if (dev->revision == 1) {
 			rcktpt_type[i] = ROCKET_TYPE_MODEMII;
 			rocketModel[i].loadrm2 = 1;
@@ -1974,7 +1946,6 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 		rocketModel[i].numPorts = 4;
 		break;
 	default:
-		str = "(unknown/unsupported)";
 		max_num_aiops = 0;
 		break;
 	}
@@ -2000,14 +1971,12 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 			if (!
 			    (sInW(ConfigIO + _PCI_9030_GPIO_CTRL) &
 			     PCI_GPIO_CTRL_8PORT)) {
-				str = "Quadcable";
 				ports_per_aiop = 4;
 				rocketModel[i].numPorts = 4;
 			}
 		}
 		break;
 	case PCI_DEVICE_ID_UPCI_RM3_8PORT:
-		str = "8 ports";
 		max_num_aiops = 1;
 		rocketModel[i].model = MODEL_UPCI_RM3_8PORT;
 		strcpy(rocketModel[i].modelString, "RocketModem III 8 port");
@@ -2018,7 +1987,6 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 		rcktpt_type[i] = ROCKET_TYPE_MODEMIII;
 		break;
 	case PCI_DEVICE_ID_UPCI_RM3_4PORT:
-		str = "4 ports";
 		max_num_aiops = 1;
 		rocketModel[i].model = MODEL_UPCI_RM3_4PORT;
 		strcpy(rocketModel[i].modelString, "RocketModem III 4 port");
@@ -2032,21 +2000,6 @@ static __init int register_PCI(int i, struct pci_dev *dev)
 		break;
 	}
 
-	switch (rcktpt_type[i]) {
-	case ROCKET_TYPE_MODEM:
-		board_type = "RocketModem";
-		break;
-	case ROCKET_TYPE_MODEMII:
-		board_type = "RocketModem II";
-		break;
-	case ROCKET_TYPE_MODEMIII:
-		board_type = "RocketModem III";
-		break;
-	default:
-		board_type = "RocketPort";
-		break;
-	}
-
 	if (fast_clock) {
 		sClockPrescale = 0x12;	/* mod 2 (divide by 3) */
 		rp_baud_base[i] = 921600;
diff --git a/drivers/tty/serial/21285.c b/drivers/tty/serial/21285.c
index d89aa38c5cf0..1b37626e8f13 100644
--- a/drivers/tty/serial/21285.c
+++ b/drivers/tty/serial/21285.c
@@ -1,6 +1,4 @@
 /*
- * linux/drivers/serial/21285.c
- *
  * Driver for the serial port on the 21285 StrongArm-110 core logic chip.
  *
  * Based on drivers/char/serial.c
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index 6611535f4440..b40f7b90c81d 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/8250.c
- *
  *  Driver for 8250/16550-type serial ports
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
@@ -273,7 +271,7 @@ static const struct serial8250_config uart_config[] = {
 		.fifo_size	= 32,
 		.tx_loadsz	= 32,
 		.fcr		= UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
-		.flags		= UART_CAP_FIFO | UART_CAP_UUE,
+		.flags		= UART_CAP_FIFO | UART_CAP_UUE | UART_CAP_RTOIE,
 	},
 	[PORT_RM9000] = {
 		.name		= "RM9000",
@@ -303,6 +301,14 @@ static const struct serial8250_config uart_config[] = {
 		.fcr		= UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
 		.flags		= UART_CAP_FIFO | UART_CAP_AFE,
 	},
+	[PORT_TEGRA] = {
+		.name		= "Tegra",
+		.fifo_size	= 32,
+		.tx_loadsz	= 8,
+		.fcr		= UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_01 |
+				  UART_FCR_T_TRIG_01,
+		.flags		= UART_CAP_FIFO | UART_CAP_RTOIE,
+	},
 };
 
 #if defined(CONFIG_MIPS_ALCHEMY)
@@ -1427,6 +1433,27 @@ static void serial8250_enable_ms(struct uart_port *port)
 	serial_out(up, UART_IER, up->ier);
 }
 
+/*
+ * Clear the Tegra rx fifo after a break
+ *
+ * FIXME: This needs to become a port specific callback once we have a
+ * framework for this
+ */
+static void clear_rx_fifo(struct uart_8250_port *up)
+{
+	unsigned int status, tmout = 10000;
+	do {
+		status = serial_in(up, UART_LSR);
+		if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS))
+			status = serial_in(up, UART_RX);
+		else
+			break;
+		if (--tmout == 0)
+			break;
+		udelay(1);
+	} while (1);
+}
+
 static void
 receive_chars(struct uart_8250_port *up, unsigned int *status)
 {
@@ -1462,6 +1489,13 @@ receive_chars(struct uart_8250_port *up, unsigned int *status)
 				lsr &= ~(UART_LSR_FE | UART_LSR_PE);
 				up->port.icount.brk++;
 				/*
+				 * If tegra port then clear the rx fifo to
+				 * accept another break/character.
+				 */
+				if (up->port.type == PORT_TEGRA)
+					clear_rx_fifo(up);
+
+				/*
 				 * We do the SysRQ and SAK checking
 				 * here because otherwise the break
 				 * may get masked by ignore_status_mask
@@ -2405,7 +2439,9 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
 			UART_ENABLE_MS(&up->port, termios->c_cflag))
 		up->ier |= UART_IER_MSI;
 	if (up->capabilities & UART_CAP_UUE)
-		up->ier |= UART_IER_UUE | UART_IER_RTOIE;
+		up->ier |= UART_IER_UUE;
+	if (up->capabilities & UART_CAP_RTOIE)
+		up->ier |= UART_IER_RTOIE;
 
 	serial_out(up, UART_IER, up->ier);
 
diff --git a/drivers/tty/serial/8250.h b/drivers/tty/serial/8250.h
index 6e19ea3e48d5..6edf4a6a22d4 100644
--- a/drivers/tty/serial/8250.h
+++ b/drivers/tty/serial/8250.h
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/8250.h
- *
  *  Driver for 8250/16550-type serial ports
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
@@ -44,6 +42,7 @@ struct serial8250_config {
 #define UART_CAP_SLEEP	(1 << 10)	/* UART has IER sleep */
 #define UART_CAP_AFE	(1 << 11)	/* MCR-based hw flow control */
 #define UART_CAP_UUE	(1 << 12)	/* UART needs IER bit 6 set (Xscale) */
+#define UART_CAP_RTOIE	(1 << 13)	/* UART needs IER bit 4 set (Xscale, Tegra) */
 
 #define UART_BUG_QUOT	(1 << 0)	/* UART has buggy quot LSB */
 #define UART_BUG_TXEN	(1 << 1)	/* UART has buggy TX IIR status */
diff --git a/drivers/tty/serial/8250_accent.c b/drivers/tty/serial/8250_accent.c
index 9c10262f2469..34b51c651192 100644
--- a/drivers/tty/serial/8250_accent.c
+++ b/drivers/tty/serial/8250_accent.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/8250_accent.c
- *
  *  Copyright (C) 2005 Russell King.
  *  Data taken from include/asm-i386/serial.h
  *
diff --git a/drivers/tty/serial/8250_boca.c b/drivers/tty/serial/8250_boca.c
index 3bfe0f7b26fb..d125dc107985 100644
--- a/drivers/tty/serial/8250_boca.c
+++ b/drivers/tty/serial/8250_boca.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/8250_boca.c
- *
  *  Copyright (C) 2005 Russell King.
  *  Data taken from include/asm-i386/serial.h
  *
diff --git a/drivers/tty/serial/8250_exar_st16c554.c b/drivers/tty/serial/8250_exar_st16c554.c
index 567143ace159..bf53aabf9b5e 100644
--- a/drivers/tty/serial/8250_exar_st16c554.c
+++ b/drivers/tty/serial/8250_exar_st16c554.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/8250_exar.c
- *
  *  Written by Paul B Schroeder < pschroeder "at" uplogix "dot" com >
  *  Based on 8250_boca.
  *
diff --git a/drivers/tty/serial/8250_fourport.c b/drivers/tty/serial/8250_fourport.c
index 6375d68b7913..be1582609626 100644
--- a/drivers/tty/serial/8250_fourport.c
+++ b/drivers/tty/serial/8250_fourport.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/8250_fourport.c
- *
  *  Copyright (C) 2005 Russell King.
  *  Data taken from include/asm-i386/serial.h
  *
diff --git a/drivers/tty/serial/8250_hub6.c b/drivers/tty/serial/8250_hub6.c
index 7609150e7d5e..a5c778e83de0 100644
--- a/drivers/tty/serial/8250_hub6.c
+++ b/drivers/tty/serial/8250_hub6.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/8250_hub6.c
- *
  *  Copyright (C) 2005 Russell King.
  *  Data taken from include/asm-i386/serial.h
  *
diff --git a/drivers/tty/serial/8250_mca.c b/drivers/tty/serial/8250_mca.c
index d10be944ad44..d20abf04541e 100644
--- a/drivers/tty/serial/8250_mca.c
+++ b/drivers/tty/serial/8250_mca.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/8250_mca.c
- *
  *  Copyright (C) 2005 Russell King.
  *  Data taken from include/asm-i386/serial.h
  *
diff --git a/drivers/tty/serial/8250_pci.c b/drivers/tty/serial/8250_pci.c
index 738cec9807d3..4b4968a294b2 100644
--- a/drivers/tty/serial/8250_pci.c
+++ b/drivers/tty/serial/8250_pci.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/8250_pci.c
- *
  *  Probe module for 8250/16550-type PCI serial ports.
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
@@ -973,6 +971,14 @@ ce4100_serial_setup(struct serial_private *priv,
 	return ret;
 }
 
+static int
+pci_omegapci_setup(struct serial_private *priv,
+		      struct pciserial_board *board,
+		      struct uart_port *port, int idx)
+{
+	return setup_port(priv, port, 2, idx * 8, 0);
+}
+
 static int skip_tx_en_setup(struct serial_private *priv,
 			const struct pciserial_board *board,
 			struct uart_port *port, int idx)
@@ -1012,6 +1018,8 @@ static int skip_tx_en_setup(struct serial_private *priv,
 #define PCI_DEVICE_ID_TITAN_200EI	0xA016
 #define PCI_DEVICE_ID_TITAN_200EISI	0xA017
 #define PCI_DEVICE_ID_OXSEMI_16PCI958	0x9538
+#define PCIE_DEVICE_ID_NEO_2_OX_IBM	0x00F6
+#define PCI_DEVICE_ID_PLX_CRONYX_OMEGA	0xc001
 
 /* Unknown vendors/cards - this should not be in linux/pci_ids.h */
 #define PCI_SUBDEVICE_ID_UNKNOWN_0x1584	0x1584
@@ -1412,7 +1420,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
 		.setup		= pci_default_setup,
 	},
 	/*
-	 * For Oxford Semiconductor and Mainpine
+	 * For Oxford Semiconductor Tornado based devices
 	 */
 	{
 		.vendor		= PCI_VENDOR_ID_OXSEMI,
@@ -1430,6 +1438,24 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
 		.init		= pci_oxsemi_tornado_init,
 		.setup		= pci_default_setup,
 	},
+	{
+		.vendor		= PCI_VENDOR_ID_DIGI,
+		.device		= PCIE_DEVICE_ID_NEO_2_OX_IBM,
+		.subvendor		= PCI_SUBVENDOR_ID_IBM,
+		.subdevice		= PCI_ANY_ID,
+		.init			= pci_oxsemi_tornado_init,
+		.setup		= pci_default_setup,
+	},
+	/*
+	 * Cronyx Omega PCI (PLX-chip based)
+	 */
+	{
+		.vendor		= PCI_VENDOR_ID_PLX,
+		.device		= PCI_DEVICE_ID_PLX_CRONYX_OMEGA,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.setup		= pci_omegapci_setup,
+	 },
 	/*
 	 * Default "match everything" terminator entry
 	 */
@@ -1617,6 +1643,7 @@ enum pci_board_num_t {
 	pbn_ADDIDATA_PCIe_4_3906250,
 	pbn_ADDIDATA_PCIe_8_3906250,
 	pbn_ce4100_1_115200,
+	pbn_omegapci,
 };
 
 /*
@@ -2312,6 +2339,12 @@ static struct pciserial_board pci_boards[] __devinitdata = {
 		.base_baud	= 921600,
 		.reg_shift      = 2,
 	},
+	[pbn_omegapci] = {
+		.flags		= FL_BASE0,
+		.num_ports	= 8,
+		.base_baud	= 115200,
+		.uart_offset	= 0x200,
+	},
 };
 
 static const struct pci_device_id softmodem_blacklist[] = {
@@ -3075,6 +3108,14 @@ static struct pci_device_id serial_pci_tbl[] = {
 	{	PCI_VENDOR_ID_MAINPINE, 0x4000,	/* IQ Express 8 Port V.34 Super-G3 Fax */
 		PCI_VENDOR_ID_MAINPINE, 0x4008, 0, 0,
 		pbn_oxsemi_8_4000000 },
+
+	/*
+	 * Digi/IBM PCIe 2-port Async EIA-232 Adapter utilizing OxSemi Tornado
+	 */
+	{	PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_2_OX_IBM,
+		PCI_SUBVENDOR_ID_IBM, PCI_ANY_ID, 0, 0,
+		pbn_oxsemi_2_4000000 },
+
 	/*
 	 * SBS Technologies, Inc. P-Octal and PMC-OCTPRO cards,
 	 * from skokodyn@yahoo.com
@@ -3801,6 +3842,12 @@ static struct pci_device_id serial_pci_tbl[] = {
 		PCI_ANY_ID,  PCI_ANY_ID, 0, 0,
 		pbn_ce4100_1_115200 },
 
+	/*
+	 * Cronyx Omega PCI
+	 */
+	{	PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_CRONYX_OMEGA,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_omegapci },
 
 	/*
 	 * These entries match devices with class COMMUNICATION_SERIAL,
diff --git a/drivers/tty/serial/8250_pnp.c b/drivers/tty/serial/8250_pnp.c
index 4822cb50cd0f..fc301f6722e1 100644
--- a/drivers/tty/serial/8250_pnp.c
+++ b/drivers/tty/serial/8250_pnp.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/8250_pnp.c
- *
  *  Probe module for 8250/16550-type ISAPNP serial ports.
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index b1f0f83b870d..636144cea932 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -537,7 +537,7 @@ config SERIAL_S3C6400
 
 config SERIAL_S5PV210
 	tristate "Samsung S5PV210 Serial port support"
-	depends on SERIAL_SAMSUNG && (CPU_S5PV210 || CPU_S5P6442 || CPU_EXYNOS4210)
+	depends on SERIAL_SAMSUNG && (CPU_S5PV210 || CPU_EXYNOS4210)
 	select SERIAL_SAMSUNG_UARTS_4 if (CPU_S5PV210 || CPU_EXYNOS4210)
 	default y
 	help
@@ -1585,7 +1585,7 @@ config SERIAL_IFX6X60
 	  Support for the IFX6x60 modem devices on Intel MID platforms.
 
 config SERIAL_PCH_UART
-	tristate "Intel EG20T PCH UART/OKI SEMICONDUCTOR ML7213 IOH"
+	tristate "Intel EG20T PCH / OKI SEMICONDUCTOR IOH(ML7213/ML7223) UART"
 	depends on PCI
 	select SERIAL_CORE
 	help
@@ -1593,10 +1593,12 @@ config SERIAL_PCH_UART
 	  which is an IOH(Input/Output Hub) for x86 embedded processor.
 	  Enabling PCH_DMA, this PCH UART works as DMA mode.
 
-	  This driver also can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/
-	  Output Hub) which is for IVI(In-Vehicle Infotainment) use.
-	  ML7213 is companion chip for Intel Atom E6xx series.
-	  ML7213 is completely compatible for Intel EG20T PCH.
+	  This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
+	  Output Hub), ML7213 and ML7223.
+	  ML7213 IOH is for IVI(In-Vehicle Infotainment) use and ML7223 IOH is
+	  for MP(Media Phone) use.
+	  ML7213/ML7223 is companion chip for Intel Atom E6xx series.
+	  ML7213/ML7223 is completely compatible for Intel EG20T PCH.
 
 config SERIAL_MSM_SMD
 	bool "Enable tty device interface for some SMD ports"
@@ -1620,4 +1622,17 @@ config SERIAL_MXS_AUART_CONSOLE
 	help
 	  Enable a MXS AUART port to be the system console.
 
+config SERIAL_XILINX_PS_UART
+	tristate "Xilinx PS UART support"
+	select SERIAL_CORE
+	help
+	  This driver supports the Xilinx PS UART port.
+
+config SERIAL_XILINX_PS_UART_CONSOLE
+	bool "Xilinx PS UART console support"
+	depends on SERIAL_XILINX_PS_UART=y
+	select SERIAL_CORE_CONSOLE
+	help
+	  Enable a Xilinx PS UART port to be the system console.
+
 endmenu
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index 35276043d9d1..cb2628fee4c7 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -95,3 +95,4 @@ obj-$(CONFIG_SERIAL_PCH_UART)	+= pch_uart.o
 obj-$(CONFIG_SERIAL_MSM_SMD)	+= msm_smd_tty.o
 obj-$(CONFIG_SERIAL_MXS_AUART) += mxs-auart.o
 obj-$(CONFIG_SERIAL_LANTIQ)	+= lantiq.o
+obj-$(CONFIG_SERIAL_XILINX_PS_UART) += xilinx_uartps.o
diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c
index 6d5b036ac783..50bc5a5ac653 100644
--- a/drivers/tty/serial/altera_uart.c
+++ b/drivers/tty/serial/altera_uart.c
@@ -540,11 +540,14 @@ static int __devinit altera_uart_probe(struct platform_device *pdev)
 	int i = pdev->id;
 	int ret;
 
-	/* -1 emphasizes that the platform must have one port, no .N suffix */
-	if (i == -1)
-		i = 0;
+	/* if id is -1 scan for a free id and use that one */
+	if (i == -1) {
+		for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS; i++)
+			if (altera_uart_ports[i].port.mapbase == 0)
+				break;
+	}
 
-	if (i >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS)
+	if (i < 0 || i >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS)
 		return -EINVAL;
 
 	port = &altera_uart_ports[i].port;
@@ -587,6 +590,8 @@ static int __devinit altera_uart_probe(struct platform_device *pdev)
 	port->ops = &altera_uart_ops;
 	port->flags = UPF_BOOT_AUTOCONF;
 
+	dev_set_drvdata(&pdev->dev, port);
+
 	uart_add_one_port(&altera_uart_driver, port);
 
 	return 0;
@@ -594,14 +599,13 @@ static int __devinit altera_uart_probe(struct platform_device *pdev)
 
 static int __devexit altera_uart_remove(struct platform_device *pdev)
 {
-	struct uart_port *port;
-	int i = pdev->id;
+	struct uart_port *port = dev_get_drvdata(&pdev->dev);
 
-	if (i == -1)
-		i = 0;
-
-	port = &altera_uart_ports[i].port;
-	uart_remove_one_port(&altera_uart_driver, port);
+	if (port) {
+		uart_remove_one_port(&altera_uart_driver, port);
+		dev_set_drvdata(&pdev->dev, NULL);
+		port->mapbase = 0;
+	}
 
 	return 0;
 }
diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c
index d742dd2c525c..c0d10c4ddb73 100644
--- a/drivers/tty/serial/amba-pl010.c
+++ b/drivers/tty/serial/amba-pl010.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/amba.c
- *
  *  Driver for AMBA serial ports
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 6deee4e546be..8dc0541feecc 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/amba.c
- *
  *  Driver for AMBA serial ports
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index f119d1761106..652bdac8ce8e 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/atmel_serial.c
- *
  *  Driver for Atmel AT91 / AT32 Serial ports
  *  Copyright (C) 2003 Rick Bronson
  *
diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c
index b6acd19b458e..e6c3dbd781d6 100644
--- a/drivers/tty/serial/clps711x.c
+++ b/drivers/tty/serial/clps711x.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/clps711x.c
- *
  *  Driver for CLPS711x serial ports
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart.h b/drivers/tty/serial/cpm_uart/cpm_uart.h
index b754dcf0fda5..cf34d26ff6cd 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart.h
+++ b/drivers/tty/serial/cpm_uart/cpm_uart.h
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/cpm_uart.h
- *
  *  Driver for CPM (SCC/SMC) serial ports
  *
  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index a9a6a5fd169e..9488da74d4f7 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/cpm_uart.c
- *
  *  Driver for CPM (SCC/SMC) serial ports; core driver
  *
  *  Based on arch/ppc/cpm2_io/uart.c by Dan Malek
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c
index 3fc1d66e32c6..18f79575894a 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/cpm_uart.c
- *
  *  Driver for CPM (SCC/SMC) serial ports; CPM1 definitions
  *
  *  Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2)
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h
index 10eecd6af6d4..60c7e94cde1e 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h
@@ -1,6 +1,4 @@
 /*
- * linux/drivers/serial/cpm_uart/cpm_uart_cpm1.h
- *
  * Driver for CPM (SCC/SMC) serial ports
  *
  * definitions for cpm1
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c
index 814ac006393f..a4927e66e741 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/cpm_uart_cpm2.c
- *
  *  Driver for CPM (SCC/SMC) serial ports; CPM2 definitions
  *
  *  Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2)
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.h b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.h
index 7194c63dcf5f..51e651a69938 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.h
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.h
@@ -1,6 +1,4 @@
 /*
- * linux/drivers/serial/cpm_uart/cpm_uart_cpm2.h
- *
  * Driver for CPM (SCC/SMC) serial ports
  *
  * definitions for cpm2
diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c
index 8ee5a41d340d..5315525220fb 100644
--- a/drivers/tty/serial/ifx6x60.c
+++ b/drivers/tty/serial/ifx6x60.c
@@ -41,7 +41,6 @@
 #include <linux/tty.h>
 #include <linux/device.h>
 #include <linux/spi/spi.h>
-#include <linux/tty.h>
 #include <linux/kfifo.h>
 #include <linux/tty_flip.h>
 #include <linux/timer.h>
@@ -56,7 +55,6 @@
 #include <linux/sched.h>
 #include <linux/time.h>
 #include <linux/wait.h>
-#include <linux/tty.h>
 #include <linux/pm.h>
 #include <linux/pm_runtime.h>
 #include <linux/spi/ifx_modem.h>
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 62df72d9f0aa..a54473123e0a 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/imx.c
- *
  *  Driver for Motorola IMX serial ports
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index bfee9b4c6661..e6ba83876508 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -1,5 +1,5 @@
 /*
- * drivers/serial/msm_serial.c - driver for msm7k serial device and console
+ * Driver for msm7k serial device and console
  *
  * Copyright (C) 2007 Google, Inc.
  * Author: Robert Love <rlove@google.com>
diff --git a/drivers/tty/serial/msm_serial.h b/drivers/tty/serial/msm_serial.h
index 9b8dc5d0d855..e4acef5de77e 100644
--- a/drivers/tty/serial/msm_serial.h
+++ b/drivers/tty/serial/msm_serial.h
@@ -1,6 +1,4 @@
 /*
- * drivers/serial/msm_serial.h
- *
  * Copyright (C) 2007 Google, Inc.
  * Author: Robert Love <rlove@google.com>
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
diff --git a/drivers/tty/serial/msm_smd_tty.c b/drivers/tty/serial/msm_smd_tty.c
index beeff1e86093..4f41dcdcb771 100644
--- a/drivers/tty/serial/msm_smd_tty.c
+++ b/drivers/tty/serial/msm_smd_tty.c
@@ -1,5 +1,4 @@
-/* drivers/tty/serial/msm_smd_tty.c
- *
+/*
  * Copyright (C) 2007 Google, Inc.
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Author: Brian Swetland <swetland@google.com>
diff --git a/drivers/tty/serial/netx-serial.c b/drivers/tty/serial/netx-serial.c
index 7735c9f35fa0..d40da78e7c85 100644
--- a/drivers/tty/serial/netx-serial.c
+++ b/drivers/tty/serial/netx-serial.c
@@ -1,6 +1,4 @@
 /*
- * drivers/serial/netx-serial.c
- *
  * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 26403b8e4b9b..c63d0d152af6 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -253,6 +253,8 @@ enum pch_uart_num_t {
 	pch_ml7213_uart0,
 	pch_ml7213_uart1,
 	pch_ml7213_uart2,
+	pch_ml7223_uart0,
+	pch_ml7223_uart1,
 };
 
 static struct pch_uart_driver_data drv_dat[] = {
@@ -263,6 +265,8 @@ static struct pch_uart_driver_data drv_dat[] = {
 	[pch_ml7213_uart0] = {PCH_UART_8LINE, 0},
 	[pch_ml7213_uart1] = {PCH_UART_2LINE, 1},
 	[pch_ml7213_uart2] = {PCH_UART_2LINE, 2},
+	[pch_ml7223_uart0] = {PCH_UART_8LINE, 0},
+	[pch_ml7223_uart1] = {PCH_UART_2LINE, 1},
 };
 
 static unsigned int default_baud = 9600;
@@ -1534,6 +1538,10 @@ static DEFINE_PCI_DEVICE_TABLE(pch_uart_pci_id) = {
 	 .driver_data = pch_ml7213_uart1},
 	{PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8029),
 	 .driver_data = pch_ml7213_uart2},
+	{PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x800C),
+	 .driver_data = pch_ml7223_uart0},
+	{PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x800D),
+	 .driver_data = pch_ml7223_uart1},
 	{0,},
 };
 
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index e1c8d4f1ce58..5acd24a27d08 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -1,6 +1,4 @@
 /*
- * linux/drivers/serial/pmac_zilog.c
- * 
  * Driver for PowerMac Z85c30 based ESCC cell found in the
  * "macio" ASICs of various PowerMac models
  * 
diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
index 1102a39b44f5..4302e6e3768e 100644
--- a/drivers/tty/serial/pxa.c
+++ b/drivers/tty/serial/pxa.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/serial/pxa.c
- *
  *  Based on drivers/serial/8250.c by Russell King.
  *
  *  Author:	Nicolas Pitre
diff --git a/drivers/tty/serial/s3c2400.c b/drivers/tty/serial/s3c2400.c
index fed1a9a1ffb4..d13051b3df87 100644
--- a/drivers/tty/serial/s3c2400.c
+++ b/drivers/tty/serial/s3c2400.c
@@ -1,5 +1,4 @@
-/* linux/drivers/serial/s3c240.c
- *
+/*
  * Driver for Samsung SoC onboard UARTs.
  *
  * Ben Dooks, Copyright (c) 2003-2005 Simtec Electronics
diff --git a/drivers/tty/serial/s3c2410.c b/drivers/tty/serial/s3c2410.c
index 73f089d3efd6..bffe6ff9b158 100644
--- a/drivers/tty/serial/s3c2410.c
+++ b/drivers/tty/serial/s3c2410.c
@@ -1,5 +1,4 @@
-/* linux/drivers/serial/s3c2410.c
- *
+/*
  * Driver for Samsung S3C2410 SoC onboard UARTs.
  *
  * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
diff --git a/drivers/tty/serial/s3c2412.c b/drivers/tty/serial/s3c2412.c
index 1700b1a2fb7e..7e2b9504a687 100644
--- a/drivers/tty/serial/s3c2412.c
+++ b/drivers/tty/serial/s3c2412.c
@@ -1,5 +1,4 @@
-/* linux/drivers/serial/s3c2412.c
- *
+/*
  * Driver for Samsung S3C2412 and S3C2413 SoC onboard UARTs.
  *
  * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
diff --git a/drivers/tty/serial/s3c2440.c b/drivers/tty/serial/s3c2440.c
index 094cc3904b13..9e10d415d5fd 100644
--- a/drivers/tty/serial/s3c2440.c
+++ b/drivers/tty/serial/s3c2440.c
@@ -1,5 +1,4 @@
-/* linux/drivers/serial/s3c2440.c
- *
+/*
  * Driver for Samsung S3C2440 and S3C2442 SoC onboard UARTs.
  *
  * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
diff --git a/drivers/tty/serial/s3c24a0.c b/drivers/tty/serial/s3c24a0.c
index fad6083ca427..914eff22e499 100644
--- a/drivers/tty/serial/s3c24a0.c
+++ b/drivers/tty/serial/s3c24a0.c
@@ -1,5 +1,4 @@
-/* linux/drivers/serial/s3c24a0.c
- *
+/*
  * Driver for Samsung S3C24A0 SoC onboard UARTs.
  *
  * Based on drivers/serial/s3c2410.c
diff --git a/drivers/tty/serial/s3c6400.c b/drivers/tty/serial/s3c6400.c
index 4be92ab50058..ded26c42ff37 100644
--- a/drivers/tty/serial/s3c6400.c
+++ b/drivers/tty/serial/s3c6400.c
@@ -1,5 +1,4 @@
-/* linux/drivers/serial/s3c6400.c
- *
+/*
  * Driver for Samsung S3C6400 and S3C6410 SoC onboard UARTs.
  *
  * Copyright 2008 Openmoko,  Inc.
diff --git a/drivers/tty/serial/s5pv210.c b/drivers/tty/serial/s5pv210.c
index 6ebccd70a707..fb2619f93d84 100644
--- a/drivers/tty/serial/s5pv210.c
+++ b/drivers/tty/serial/s5pv210.c
@@ -1,5 +1,4 @@
-/* linux/drivers/serial/s5pv210.c
- *
+/*
  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com/
  *
diff --git a/drivers/tty/serial/sa1100.c b/drivers/tty/serial/sa1100.c
index 2199d819a987..ef7a21a6a01b 100644
--- a/drivers/tty/serial/sa1100.c
+++ b/drivers/tty/serial/sa1100.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/sa1100.c
- *
  *  Driver for SA11x0 serial ports
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 9e2fa8d784e2..f66f64829303 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1,5 +1,4 @@
-/* linux/drivers/serial/samsuing.c
- *
+/*
  * Driver core for Samsung SoC onboard UARTs.
  *
  * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
diff --git a/drivers/tty/serial/samsung.h b/drivers/tty/serial/samsung.h
index 0ac06a07d25f..5b098cd76040 100644
--- a/drivers/tty/serial/samsung.h
+++ b/drivers/tty/serial/samsung.h
@@ -1,5 +1,4 @@
-/* linux/drivers/serial/samsung.h
- *
+/*
  * Driver for Samsung SoC onboard UARTs.
  *
  * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
diff --git a/drivers/tty/serial/sb1250-duart.c b/drivers/tty/serial/sb1250-duart.c
index 602d9845c52f..ea2340b814e9 100644
--- a/drivers/tty/serial/sb1250-duart.c
+++ b/drivers/tty/serial/sb1250-duart.c
@@ -1,6 +1,4 @@
 /*
- *	drivers/serial/sb1250-duart.c
- *
  *	Support for the asynchronous serial interface (DUART) included
  *	in the BCM1250 and derived System-On-a-Chip (SOC) devices.
  *
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 733fe8e73f0f..db7912cb7ae0 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/core.c
- *
  *  Driver core for serial ports
  *
  *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
@@ -172,12 +170,16 @@ static int uart_startup(struct tty_struct *tty, struct uart_state *state, int in
 
 	retval = uport->ops->startup(uport);
 	if (retval == 0) {
-		if (init_hw) {
-			/*
-			 * Initialise the hardware port settings.
-			 */
-			uart_change_speed(tty, state, NULL);
+		if (uart_console(uport) && uport->cons->cflag) {
+			tty->termios->c_cflag = uport->cons->cflag;
+			uport->cons->cflag = 0;
+		}
+		/*
+		 * Initialise the hardware port settings.
+		 */
+		uart_change_speed(tty, state, NULL);
 
+		if (init_hw) {
 			/*
 			 * Setup the RTS and DTR signals once the
 			 * port is open and ready to respond.
@@ -1240,17 +1242,6 @@ static void uart_set_termios(struct tty_struct *tty,
 		}
 		spin_unlock_irqrestore(&state->uart_port->lock, flags);
 	}
-#if 0
-	/*
-	 * No need to wake up processes in open wait, since they
-	 * sample the CLOCAL flag once, and don't recheck it.
-	 * XXX  It's not clear whether the current behavior is correct
-	 * or not.  Hence, this may change.....
-	 */
-	if (!(old_termios->c_cflag & CLOCAL) &&
-	    (tty->termios->c_cflag & CLOCAL))
-		wake_up_interruptible(&state->uart_port.open_wait);
-#endif
 }
 
 /*
@@ -1423,7 +1414,6 @@ static void __uart_wait_until_sent(struct uart_port *port, int timeout)
 		if (time_after(jiffies, expire))
 			break;
 	}
-	set_current_state(TASK_RUNNING); /* might not be needed */
 }
 
 static void uart_wait_until_sent(struct tty_struct *tty, int timeout)
@@ -1466,45 +1456,6 @@ static void uart_hangup(struct tty_struct *tty)
 	mutex_unlock(&port->mutex);
 }
 
-/**
- *	uart_update_termios	-	update the terminal hw settings
- *	@tty: tty associated with UART
- *	@state: UART to update
- *
- *	Copy across the serial console cflag setting into the termios settings
- *	for the initial open of the port.  This allows continuity between the
- *	kernel settings, and the settings init adopts when it opens the port
- *	for the first time.
- */
-static void uart_update_termios(struct tty_struct *tty,
-						struct uart_state *state)
-{
-	struct uart_port *port = state->uart_port;
-
-	if (uart_console(port) && port->cons->cflag) {
-		tty->termios->c_cflag = port->cons->cflag;
-		port->cons->cflag = 0;
-	}
-
-	/*
-	 * If the device failed to grab its irq resources,
-	 * or some other error occurred, don't try to talk
-	 * to the port hardware.
-	 */
-	if (!(tty->flags & (1 << TTY_IO_ERROR))) {
-		/*
-		 * Make termios settings take effect.
-		 */
-		uart_change_speed(tty, state, NULL);
-
-		/*
-		 * And finally enable the RTS and DTR signals.
-		 */
-		if (tty->termios->c_cflag & CBAUD)
-			uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
-	}
-}
-
 static int uart_carrier_raised(struct tty_port *port)
 {
 	struct uart_state *state = container_of(port, struct uart_state, port);
@@ -1524,16 +1475,8 @@ static void uart_dtr_rts(struct tty_port *port, int onoff)
 	struct uart_state *state = container_of(port, struct uart_state, port);
 	struct uart_port *uport = state->uart_port;
 
-	if (onoff) {
+	if (onoff)
 		uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS);
-
-		/*
-		 * If this is the first open to succeed,
-		 * adjust things to suit.
-		 */
-		if (!test_and_set_bit(ASYNCB_NORMAL_ACTIVE, &port->flags))
-			uart_update_termios(port->tty, state);
-	}
 	else
 		uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS);
 }
@@ -1586,15 +1529,6 @@ static int uart_open(struct tty_struct *tty, struct file *filp)
 	pr_debug("uart_open(%d) called\n", line);
 
 	/*
-	 * tty->driver->num won't change, so we won't fail here with
-	 * tty->driver_data set to something non-NULL (and therefore
-	 * we won't get caught by uart_close()).
-	 */
-	retval = -ENODEV;
-	if (line >= tty->driver->num)
-		goto fail;
-
-	/*
 	 * We take the semaphore inside uart_get to guarantee that we won't
 	 * be re-entered while allocating the state structure, or while we
 	 * request any IRQs that the driver may need.  This also has the nice
@@ -1972,13 +1906,9 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport)
 	struct tty_port *port = &state->port;
 	struct device *tty_dev;
 	struct uart_match match = {uport, drv};
-	struct tty_struct *tty;
 
 	mutex_lock(&port->mutex);
 
-	/* Must be inside the mutex lock until we convert to tty_port */
-	tty = port->tty;
-
 	tty_dev = device_find_child(uport->dev, &match, serial_match_port);
 	if (device_may_wakeup(tty_dev)) {
 		if (!enable_irq_wake(uport->irq))
diff --git a/drivers/tty/serial/serial_ks8695.c b/drivers/tty/serial/serial_ks8695.c
index b1962025b1aa..2430319f2f52 100644
--- a/drivers/tty/serial/serial_ks8695.c
+++ b/drivers/tty/serial/serial_ks8695.c
@@ -1,6 +1,4 @@
 /*
- *  drivers/serial/serial_ks8695.c
- *
  *  Driver for KS8695 serial ports
  *
  *  Based on drivers/serial/serial_amba.c, by Kam Lee.
diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c
index c50e9fbbf743..8e3fc1944e6d 100644
--- a/drivers/tty/serial/serial_txx9.c
+++ b/drivers/tty/serial/serial_txx9.c
@@ -1,6 +1,4 @@
 /*
- *  drivers/serial/serial_txx9.c
- *
  * Derived from many drivers using generic_serial interface,
  * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c
  * (was in Linux/VR tree) by Jim Pick.
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 920a6f929c8b..f35b8fb94b83 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1,6 +1,4 @@
 /*
- * drivers/serial/sh-sci.c
- *
  * SuperH on-chip serial module support.  (SCI with no FIFO / with FIFO)
  *
  *  Copyright (C) 2002 - 2011  Paul Mundt
diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c
index 322bf56c0d89..37fc4e3d487c 100644
--- a/drivers/tty/serial/vt8500_serial.c
+++ b/drivers/tty/serial/vt8500_serial.c
@@ -1,6 +1,4 @@
 /*
- * drivers/serial/vt8500_serial.c
- *
  * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
  *
  * Based on msm_serial.c, which is:
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
new file mode 100644
index 000000000000..19cc1e8149dd
--- /dev/null
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -0,0 +1,1113 @@
+/*
+ * Xilinx PS UART driver
+ *
+ * 2011 (c) Xilinx Inc.
+ *
+ * This program is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation;
+ * either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <linux/serial_core.h>
+#include <linux/console.h>
+#include <linux/serial.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/of.h>
+
+#define XUARTPS_TTY_NAME	"ttyPS"
+#define XUARTPS_NAME		"xuartps"
+#define XUARTPS_MAJOR		0	/* use dynamic node allocation */
+#define XUARTPS_MINOR		0	/* works best with devtmpfs */
+#define XUARTPS_NR_PORTS	2
+#define XUARTPS_FIFO_SIZE	16	/* FIFO size */
+#define XUARTPS_REGISTER_SPACE	0xFFF
+
+#define xuartps_readl(offset)		ioread32(port->membase + offset)
+#define xuartps_writel(val, offset)	iowrite32(val, port->membase + offset)
+
+/********************************Register Map********************************/
+/** UART
+ *
+ * Register offsets for the UART.
+ *
+ */
+#define XUARTPS_CR_OFFSET	0x00  /* Control Register [8:0] */
+#define XUARTPS_MR_OFFSET	0x04  /* Mode Register [10:0] */
+#define XUARTPS_IER_OFFSET	0x08  /* Interrupt Enable [10:0] */
+#define XUARTPS_IDR_OFFSET	0x0C  /* Interrupt Disable [10:0] */
+#define XUARTPS_IMR_OFFSET	0x10  /* Interrupt Mask [10:0] */
+#define XUARTPS_ISR_OFFSET	0x14  /* Interrupt Status [10:0]*/
+#define XUARTPS_BAUDGEN_OFFSET	0x18  /* Baud Rate Generator [15:0] */
+#define XUARTPS_RXTOUT_OFFSET	0x1C  /* RX Timeout [7:0] */
+#define XUARTPS_RXWM_OFFSET	0x20  /* RX FIFO Trigger Level [5:0] */
+#define XUARTPS_MODEMCR_OFFSET	0x24  /* Modem Control [5:0] */
+#define XUARTPS_MODEMSR_OFFSET	0x28  /* Modem Status [8:0] */
+#define XUARTPS_SR_OFFSET	0x2C  /* Channel Status [11:0] */
+#define XUARTPS_FIFO_OFFSET	0x30  /* FIFO [15:0] or [7:0] */
+#define XUARTPS_BAUDDIV_OFFSET	0x34  /* Baud Rate Divider [7:0] */
+#define XUARTPS_FLOWDEL_OFFSET	0x38  /* Flow Delay [15:0] */
+#define XUARTPS_IRRX_PWIDTH_OFFSET 0x3C /* IR Minimum Received Pulse
+						Width [15:0] */
+#define XUARTPS_IRTX_PWIDTH_OFFSET 0x40 /* IR Transmitted pulse
+						Width [7:0] */
+#define XUARTPS_TXWM_OFFSET	0x44  /* TX FIFO Trigger Level [5:0] */
+
+/** Control Register
+ *
+ * The Control register (CR) controls the major functions of the device.
+ *
+ * Control Register Bit Definitions
+ */
+#define XUARTPS_CR_STOPBRK	0x00000100  /* Stop TX break */
+#define XUARTPS_CR_STARTBRK	0x00000080  /* Set TX break */
+#define XUARTPS_CR_TX_DIS	0x00000020  /* TX disabled. */
+#define XUARTPS_CR_TX_EN	0x00000010  /* TX enabled */
+#define XUARTPS_CR_RX_DIS	0x00000008  /* RX disabled. */
+#define XUARTPS_CR_RX_EN	0x00000004  /* RX enabled */
+#define XUARTPS_CR_TXRST	0x00000002  /* TX logic reset */
+#define XUARTPS_CR_RXRST	0x00000001  /* RX logic reset */
+#define XUARTPS_CR_RST_TO	0x00000040  /* Restart Timeout Counter */
+
+/** Mode Register
+ *
+ * The mode register (MR) defines the mode of transfer as well as the data
+ * format. If this register is modified during transmission or reception,
+ * data validity cannot be guaranteed.
+ *
+ * Mode Register Bit Definitions
+ *
+ */
+#define XUARTPS_MR_CLKSEL		0x00000001  /* Pre-scalar selection */
+#define XUARTPS_MR_CHMODE_L_LOOP	0x00000200  /* Local loop back mode */
+#define XUARTPS_MR_CHMODE_NORM		0x00000000  /* Normal mode */
+
+#define XUARTPS_MR_STOPMODE_2_BIT	0x00000080  /* 2 stop bits */
+#define XUARTPS_MR_STOPMODE_1_BIT	0x00000000  /* 1 stop bit */
+
+#define XUARTPS_MR_PARITY_NONE		0x00000020  /* No parity mode */
+#define XUARTPS_MR_PARITY_MARK		0x00000018  /* Mark parity mode */
+#define XUARTPS_MR_PARITY_SPACE		0x00000010  /* Space parity mode */
+#define XUARTPS_MR_PARITY_ODD		0x00000008  /* Odd parity mode */
+#define XUARTPS_MR_PARITY_EVEN		0x00000000  /* Even parity mode */
+
+#define XUARTPS_MR_CHARLEN_6_BIT	0x00000006  /* 6 bits data */
+#define XUARTPS_MR_CHARLEN_7_BIT	0x00000004  /* 7 bits data */
+#define XUARTPS_MR_CHARLEN_8_BIT	0x00000000  /* 8 bits data */
+
+/** Interrupt Registers
+ *
+ * Interrupt control logic uses the interrupt enable register (IER) and the
+ * interrupt disable register (IDR) to set the value of the bits in the
+ * interrupt mask register (IMR). The IMR determines whether to pass an
+ * interrupt to the interrupt status register (ISR).
+ * Writing a 1 to IER Enables an interrupt, writing a 1 to IDR disables an
+ * interrupt. IMR and ISR are read only, and IER and IDR are write only.
+ * Reading either IER or IDR returns 0x00.
+ *
+ * All four registers have the same bit definitions.
+ */
+#define XUARTPS_IXR_TOUT	0x00000100 /* RX Timeout error interrupt */
+#define XUARTPS_IXR_PARITY	0x00000080 /* Parity error interrupt */
+#define XUARTPS_IXR_FRAMING	0x00000040 /* Framing error interrupt */
+#define XUARTPS_IXR_OVERRUN	0x00000020 /* Overrun error interrupt */
+#define XUARTPS_IXR_TXFULL	0x00000010 /* TX FIFO Full interrupt */
+#define XUARTPS_IXR_TXEMPTY	0x00000008 /* TX FIFO empty interrupt */
+#define XUARTPS_ISR_RXEMPTY	0x00000002 /* RX FIFO empty interrupt */
+#define XUARTPS_IXR_RXTRIG	0x00000001 /* RX FIFO trigger interrupt */
+#define XUARTPS_IXR_RXFULL	0x00000004 /* RX FIFO full interrupt. */
+#define XUARTPS_IXR_RXEMPTY	0x00000002 /* RX FIFO empty interrupt. */
+#define XUARTPS_IXR_MASK	0x00001FFF /* Valid bit mask */
+
+/** Channel Status Register
+ *
+ * The channel status register (CSR) is provided to enable the control logic
+ * to monitor the status of bits in the channel interrupt status register,
+ * even if these are masked out by the interrupt mask register.
+ */
+#define XUARTPS_SR_RXEMPTY	0x00000002 /* RX FIFO empty */
+#define XUARTPS_SR_TXEMPTY	0x00000008 /* TX FIFO empty */
+#define XUARTPS_SR_TXFULL	0x00000010 /* TX FIFO full */
+#define XUARTPS_SR_RXTRIG	0x00000001 /* Rx Trigger */
+
+/**
+ * xuartps_isr - Interrupt handler
+ * @irq: Irq number
+ * @dev_id: Id of the port
+ *
+ * Returns IRQHANDLED
+ **/
+static irqreturn_t xuartps_isr(int irq, void *dev_id)
+{
+	struct uart_port *port = (struct uart_port *)dev_id;
+	struct tty_struct *tty;
+	unsigned long flags;
+	unsigned int isrstatus, numbytes;
+	unsigned int data;
+	char status = TTY_NORMAL;
+
+	/* Get the tty which could be NULL so don't assume it's valid */
+	tty = tty_port_tty_get(&port->state->port);
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	/* Read the interrupt status register to determine which
+	 * interrupt(s) is/are active.
+	 */
+	isrstatus = xuartps_readl(XUARTPS_ISR_OFFSET);
+
+	/* drop byte with parity error if IGNPAR specified */
+	if (isrstatus & port->ignore_status_mask & XUARTPS_IXR_PARITY)
+		isrstatus &= ~(XUARTPS_IXR_RXTRIG | XUARTPS_IXR_TOUT);
+
+	isrstatus &= port->read_status_mask;
+	isrstatus &= ~port->ignore_status_mask;
+
+	if ((isrstatus & XUARTPS_IXR_TOUT) ||
+		(isrstatus & XUARTPS_IXR_RXTRIG)) {
+		/* Receive Timeout Interrupt */
+		while ((xuartps_readl(XUARTPS_SR_OFFSET) &
+			XUARTPS_SR_RXEMPTY) != XUARTPS_SR_RXEMPTY) {
+			data = xuartps_readl(XUARTPS_FIFO_OFFSET);
+			port->icount.rx++;
+
+			if (isrstatus & XUARTPS_IXR_PARITY) {
+				port->icount.parity++;
+				status = TTY_PARITY;
+			} else if (isrstatus & XUARTPS_IXR_FRAMING) {
+				port->icount.frame++;
+				status = TTY_FRAME;
+			} else if (isrstatus & XUARTPS_IXR_OVERRUN)
+				port->icount.overrun++;
+
+			if (tty)
+				uart_insert_char(port, isrstatus,
+						XUARTPS_IXR_OVERRUN, data,
+						status);
+		}
+		spin_unlock(&port->lock);
+		if (tty)
+			tty_flip_buffer_push(tty);
+		spin_lock(&port->lock);
+	}
+
+	/* Dispatch an appropriate handler */
+	if ((isrstatus & XUARTPS_IXR_TXEMPTY) == XUARTPS_IXR_TXEMPTY) {
+		if (uart_circ_empty(&port->state->xmit)) {
+			xuartps_writel(XUARTPS_IXR_TXEMPTY,
+						XUARTPS_IDR_OFFSET);
+		} else {
+			numbytes = port->fifosize;
+			/* Break if no more data available in the UART buffer */
+			while (numbytes--) {
+				if (uart_circ_empty(&port->state->xmit))
+					break;
+				/* Get the data from the UART circular buffer
+				 * and write it to the xuartps's TX_FIFO
+				 * register.
+				 */
+				xuartps_writel(
+					port->state->xmit.buf[port->state->xmit.
+					tail], XUARTPS_FIFO_OFFSET);
+
+				port->icount.tx++;
+
+				/* Adjust the tail of the UART buffer and wrap
+				 * the buffer if it reaches limit.
+				 */
+				port->state->xmit.tail =
+					(port->state->xmit.tail + 1) & \
+						(UART_XMIT_SIZE - 1);
+			}
+
+			if (uart_circ_chars_pending(
+					&port->state->xmit) < WAKEUP_CHARS)
+				uart_write_wakeup(port);
+		}
+	}
+
+	xuartps_writel(isrstatus, XUARTPS_ISR_OFFSET);
+
+	/* be sure to release the lock and tty before leaving */
+	spin_unlock_irqrestore(&port->lock, flags);
+	tty_kref_put(tty);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * xuartps_set_baud_rate - Calculate and set the baud rate
+ * @port: Handle to the uart port structure
+ * @baud: Baud rate to set
+ *
+ * Returns baud rate, requested baud when possible, or actual baud when there
+ *	was too much error
+ **/
+static unsigned int xuartps_set_baud_rate(struct uart_port *port,
+						unsigned int baud)
+{
+	unsigned int sel_clk;
+	unsigned int calc_baud = 0;
+	unsigned int brgr_val, brdiv_val;
+	unsigned int bauderror;
+
+	/* Formula to obtain baud rate is
+	 *	baud_tx/rx rate = sel_clk/CD * (BDIV + 1)
+	 *	input_clk = (Uart User Defined Clock or Apb Clock)
+	 *		depends on UCLKEN in MR Reg
+	 *	sel_clk = input_clk or input_clk/8;
+	 *		depends on CLKS in MR reg
+	 *	CD and BDIV depends on values in
+	 *			baud rate generate register
+	 *			baud rate clock divisor register
+	 */
+	sel_clk = port->uartclk;
+	if (xuartps_readl(XUARTPS_MR_OFFSET) & XUARTPS_MR_CLKSEL)
+		sel_clk = sel_clk / 8;
+
+	/* Find the best values for baud generation */
+	for (brdiv_val = 4; brdiv_val < 255; brdiv_val++) {
+
+		brgr_val = sel_clk / (baud * (brdiv_val + 1));
+		if (brgr_val < 2 || brgr_val > 65535)
+			continue;
+
+		calc_baud = sel_clk / (brgr_val * (brdiv_val + 1));
+
+		if (baud > calc_baud)
+			bauderror = baud - calc_baud;
+		else
+			bauderror = calc_baud - baud;
+
+		/* use the values when percent error is acceptable */
+		if (((bauderror * 100) / baud) < 3) {
+			calc_baud = baud;
+			break;
+		}
+	}
+
+	/* Set the values for the new baud rate */
+	xuartps_writel(brgr_val, XUARTPS_BAUDGEN_OFFSET);
+	xuartps_writel(brdiv_val, XUARTPS_BAUDDIV_OFFSET);
+
+	return calc_baud;
+}
+
+/*----------------------Uart Operations---------------------------*/
+
+/**
+ * xuartps_start_tx -  Start transmitting bytes
+ * @port: Handle to the uart port structure
+ *
+ **/
+static void xuartps_start_tx(struct uart_port *port)
+{
+	unsigned int status, numbytes = port->fifosize;
+
+	if (uart_circ_empty(&port->state->xmit) || uart_tx_stopped(port))
+		return;
+
+	status = xuartps_readl(XUARTPS_CR_OFFSET);
+	/* Set the TX enable bit and clear the TX disable bit to enable the
+	 * transmitter.
+	 */
+	xuartps_writel((status & ~XUARTPS_CR_TX_DIS) | XUARTPS_CR_TX_EN,
+		XUARTPS_CR_OFFSET);
+
+	while (numbytes-- && ((xuartps_readl(XUARTPS_SR_OFFSET)
+		& XUARTPS_SR_TXFULL)) != XUARTPS_SR_TXFULL) {
+
+		/* Break if no more data available in the UART buffer */
+		if (uart_circ_empty(&port->state->xmit))
+			break;
+
+		/* Get the data from the UART circular buffer and
+		 * write it to the xuartps's TX_FIFO register.
+		 */
+		xuartps_writel(
+			port->state->xmit.buf[port->state->xmit.tail],
+			XUARTPS_FIFO_OFFSET);
+		port->icount.tx++;
+
+		/* Adjust the tail of the UART buffer and wrap
+		 * the buffer if it reaches limit.
+		 */
+		port->state->xmit.tail = (port->state->xmit.tail + 1) &
+					(UART_XMIT_SIZE - 1);
+	}
+
+	/* Enable the TX Empty interrupt */
+	xuartps_writel(XUARTPS_IXR_TXEMPTY, XUARTPS_IER_OFFSET);
+
+	if (uart_circ_chars_pending(&port->state->xmit) < WAKEUP_CHARS)
+		uart_write_wakeup(port);
+}
+
+/**
+ * xuartps_stop_tx - Stop TX
+ * @port: Handle to the uart port structure
+ *
+ **/
+static void xuartps_stop_tx(struct uart_port *port)
+{
+	unsigned int regval;
+
+	regval = xuartps_readl(XUARTPS_CR_OFFSET);
+	regval |= XUARTPS_CR_TX_DIS;
+	/* Disable the transmitter */
+	xuartps_writel(regval, XUARTPS_CR_OFFSET);
+}
+
+/**
+ * xuartps_stop_rx - Stop RX
+ * @port: Handle to the uart port structure
+ *
+ **/
+static void xuartps_stop_rx(struct uart_port *port)
+{
+	unsigned int regval;
+
+	regval = xuartps_readl(XUARTPS_CR_OFFSET);
+	regval |= XUARTPS_CR_RX_DIS;
+	/* Disable the receiver */
+	xuartps_writel(regval, XUARTPS_CR_OFFSET);
+}
+
+/**
+ * xuartps_tx_empty -  Check whether TX is empty
+ * @port: Handle to the uart port structure
+ *
+ * Returns TIOCSER_TEMT on success, 0 otherwise
+ **/
+static unsigned int xuartps_tx_empty(struct uart_port *port)
+{
+	unsigned int status;
+
+	status = xuartps_readl(XUARTPS_ISR_OFFSET) & XUARTPS_IXR_TXEMPTY;
+	return status ? TIOCSER_TEMT : 0;
+}
+
+/**
+ * xuartps_break_ctl - Based on the input ctl we have to start or stop
+ *			transmitting char breaks
+ * @port: Handle to the uart port structure
+ * @ctl: Value based on which start or stop decision is taken
+ *
+ **/
+static void xuartps_break_ctl(struct uart_port *port, int ctl)
+{
+	unsigned int status;
+	unsigned long flags;
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	status = xuartps_readl(XUARTPS_CR_OFFSET);
+
+	if (ctl == -1)
+		xuartps_writel(XUARTPS_CR_STARTBRK | status,
+					XUARTPS_CR_OFFSET);
+	else {
+		if ((status & XUARTPS_CR_STOPBRK) == 0)
+			xuartps_writel(XUARTPS_CR_STOPBRK | status,
+					 XUARTPS_CR_OFFSET);
+	}
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+/**
+ * xuartps_set_termios - termios operations, handling data length, parity,
+ *				stop bits, flow control, baud rate
+ * @port: Handle to the uart port structure
+ * @termios: Handle to the input termios structure
+ * @old: Values of the previously saved termios structure
+ *
+ **/
+static void xuartps_set_termios(struct uart_port *port,
+				struct ktermios *termios, struct ktermios *old)
+{
+	unsigned int cval = 0;
+	unsigned int baud;
+	unsigned long flags;
+	unsigned int ctrl_reg, mode_reg;
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	/* Empty the receive FIFO 1st before making changes */
+	while ((xuartps_readl(XUARTPS_SR_OFFSET) &
+		 XUARTPS_SR_RXEMPTY) != XUARTPS_SR_RXEMPTY) {
+		xuartps_readl(XUARTPS_FIFO_OFFSET);
+	}
+
+	/* Disable the TX and RX to set baud rate */
+	xuartps_writel(xuartps_readl(XUARTPS_CR_OFFSET) |
+			(XUARTPS_CR_TX_DIS | XUARTPS_CR_RX_DIS),
+			XUARTPS_CR_OFFSET);
+
+	/* Min baud rate = 6bps and Max Baud Rate is 10Mbps for 100Mhz clk */
+	baud = uart_get_baud_rate(port, termios, old, 0, 10000000);
+	baud = xuartps_set_baud_rate(port, baud);
+	if (tty_termios_baud_rate(termios))
+		tty_termios_encode_baud_rate(termios, baud, baud);
+
+	/*
+	 * Update the per-port timeout.
+	 */
+	uart_update_timeout(port, termios->c_cflag, baud);
+
+	/* Set TX/RX Reset */
+	xuartps_writel(xuartps_readl(XUARTPS_CR_OFFSET) |
+			(XUARTPS_CR_TXRST | XUARTPS_CR_RXRST),
+			XUARTPS_CR_OFFSET);
+
+	ctrl_reg = xuartps_readl(XUARTPS_CR_OFFSET);
+
+	/* Clear the RX disable and TX disable bits and then set the TX enable
+	 * bit and RX enable bit to enable the transmitter and receiver.
+	 */
+	xuartps_writel(
+		(ctrl_reg & ~(XUARTPS_CR_TX_DIS | XUARTPS_CR_RX_DIS))
+			| (XUARTPS_CR_TX_EN | XUARTPS_CR_RX_EN),
+			XUARTPS_CR_OFFSET);
+
+	xuartps_writel(10, XUARTPS_RXTOUT_OFFSET);
+
+	port->read_status_mask = XUARTPS_IXR_TXEMPTY | XUARTPS_IXR_RXTRIG |
+			XUARTPS_IXR_OVERRUN | XUARTPS_IXR_TOUT;
+	port->ignore_status_mask = 0;
+
+	if (termios->c_iflag & INPCK)
+		port->read_status_mask |= XUARTPS_IXR_PARITY |
+		XUARTPS_IXR_FRAMING;
+
+	if (termios->c_iflag & IGNPAR)
+		port->ignore_status_mask |= XUARTPS_IXR_PARITY |
+			XUARTPS_IXR_FRAMING | XUARTPS_IXR_OVERRUN;
+
+	/* ignore all characters if CREAD is not set */
+	if ((termios->c_cflag & CREAD) == 0)
+		port->ignore_status_mask |= XUARTPS_IXR_RXTRIG |
+			XUARTPS_IXR_TOUT | XUARTPS_IXR_PARITY |
+			XUARTPS_IXR_FRAMING | XUARTPS_IXR_OVERRUN;
+
+	mode_reg = xuartps_readl(XUARTPS_MR_OFFSET);
+
+	/* Handling Data Size */
+	switch (termios->c_cflag & CSIZE) {
+	case CS6:
+		cval |= XUARTPS_MR_CHARLEN_6_BIT;
+		break;
+	case CS7:
+		cval |= XUARTPS_MR_CHARLEN_7_BIT;
+		break;
+	default:
+	case CS8:
+		cval |= XUARTPS_MR_CHARLEN_8_BIT;
+		termios->c_cflag &= ~CSIZE;
+		termios->c_cflag |= CS8;
+		break;
+	}
+
+	/* Handling Parity and Stop Bits length */
+	if (termios->c_cflag & CSTOPB)
+		cval |= XUARTPS_MR_STOPMODE_2_BIT; /* 2 STOP bits */
+	else
+		cval |= XUARTPS_MR_STOPMODE_1_BIT; /* 1 STOP bit */
+
+	if (termios->c_cflag & PARENB) {
+		/* Mark or Space parity */
+		if (termios->c_cflag & CMSPAR) {
+			if (termios->c_cflag & PARODD)
+				cval |= XUARTPS_MR_PARITY_MARK;
+			else
+				cval |= XUARTPS_MR_PARITY_SPACE;
+		} else if (termios->c_cflag & PARODD)
+				cval |= XUARTPS_MR_PARITY_ODD;
+			else
+				cval |= XUARTPS_MR_PARITY_EVEN;
+	} else
+		cval |= XUARTPS_MR_PARITY_NONE;
+	xuartps_writel(cval , XUARTPS_MR_OFFSET);
+
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+/**
+ * xuartps_startup - Called when an application opens a xuartps port
+ * @port: Handle to the uart port structure
+ *
+ * Returns 0 on success, negative error otherwise
+ **/
+static int xuartps_startup(struct uart_port *port)
+{
+	unsigned int retval = 0, status = 0;
+
+	retval = request_irq(port->irq, xuartps_isr, 0, XUARTPS_NAME,
+								(void *)port);
+	if (retval)
+		return retval;
+
+	/* Disable the TX and RX */
+	xuartps_writel(XUARTPS_CR_TX_DIS | XUARTPS_CR_RX_DIS,
+						XUARTPS_CR_OFFSET);
+
+	/* Set the Control Register with TX/RX Enable, TX/RX Reset,
+	 * no break chars.
+	 */
+	xuartps_writel(XUARTPS_CR_TXRST | XUARTPS_CR_RXRST,
+				XUARTPS_CR_OFFSET);
+
+	status = xuartps_readl(XUARTPS_CR_OFFSET);
+
+	/* Clear the RX disable and TX disable bits and then set the TX enable
+	 * bit and RX enable bit to enable the transmitter and receiver.
+	 */
+	xuartps_writel((status & ~(XUARTPS_CR_TX_DIS | XUARTPS_CR_RX_DIS))
+			| (XUARTPS_CR_TX_EN | XUARTPS_CR_RX_EN |
+			XUARTPS_CR_STOPBRK), XUARTPS_CR_OFFSET);
+
+	/* Set the Mode Register with normal mode,8 data bits,1 stop bit,
+	 * no parity.
+	 */
+	xuartps_writel(XUARTPS_MR_CHMODE_NORM | XUARTPS_MR_STOPMODE_1_BIT
+		| XUARTPS_MR_PARITY_NONE | XUARTPS_MR_CHARLEN_8_BIT,
+		 XUARTPS_MR_OFFSET);
+
+	/* Set the RX FIFO Trigger level to 14 assuming FIFO size as 16 */
+	xuartps_writel(14, XUARTPS_RXWM_OFFSET);
+
+	/* Receive Timeout register is enabled with value of 10 */
+	xuartps_writel(10, XUARTPS_RXTOUT_OFFSET);
+
+
+	/* Set the Interrupt Registers with desired interrupts */
+	xuartps_writel(XUARTPS_IXR_TXEMPTY | XUARTPS_IXR_PARITY |
+		XUARTPS_IXR_FRAMING | XUARTPS_IXR_OVERRUN |
+		XUARTPS_IXR_RXTRIG | XUARTPS_IXR_TOUT, XUARTPS_IER_OFFSET);
+	xuartps_writel(~(XUARTPS_IXR_TXEMPTY | XUARTPS_IXR_PARITY |
+		XUARTPS_IXR_FRAMING | XUARTPS_IXR_OVERRUN |
+		XUARTPS_IXR_RXTRIG | XUARTPS_IXR_TOUT), XUARTPS_IDR_OFFSET);
+
+	return retval;
+}
+
+/**
+ * xuartps_shutdown - Called when an application closes a xuartps port
+ * @port: Handle to the uart port structure
+ *
+ **/
+static void xuartps_shutdown(struct uart_port *port)
+{
+	int status;
+
+	/* Disable interrupts */
+	status = xuartps_readl(XUARTPS_IMR_OFFSET);
+	xuartps_writel(status, XUARTPS_IDR_OFFSET);
+
+	/* Disable the TX and RX */
+	xuartps_writel(XUARTPS_CR_TX_DIS | XUARTPS_CR_RX_DIS,
+				 XUARTPS_CR_OFFSET);
+	free_irq(port->irq, port);
+}
+
+/**
+ * xuartps_type - Set UART type to xuartps port
+ * @port: Handle to the uart port structure
+ *
+ * Returns string on success, NULL otherwise
+ **/
+static const char *xuartps_type(struct uart_port *port)
+{
+	return port->type == PORT_XUARTPS ? XUARTPS_NAME : NULL;
+}
+
+/**
+ * xuartps_verify_port - Verify the port params
+ * @port: Handle to the uart port structure
+ * @ser: Handle to the structure whose members are compared
+ *
+ * Returns 0 if success otherwise -EINVAL
+ **/
+static int xuartps_verify_port(struct uart_port *port,
+					struct serial_struct *ser)
+{
+	if (ser->type != PORT_UNKNOWN && ser->type != PORT_XUARTPS)
+		return -EINVAL;
+	if (port->irq != ser->irq)
+		return -EINVAL;
+	if (ser->io_type != UPIO_MEM)
+		return -EINVAL;
+	if (port->iobase != ser->port)
+		return -EINVAL;
+	if (ser->hub6 != 0)
+		return -EINVAL;
+	return 0;
+}
+
+/**
+ * xuartps_request_port - Claim the memory region attached to xuartps port,
+ *				called when the driver adds a xuartps port via
+ *				uart_add_one_port()
+ * @port: Handle to the uart port structure
+ *
+ * Returns 0, -ENOMEM if request fails
+ **/
+static int xuartps_request_port(struct uart_port *port)
+{
+	if (!request_mem_region(port->mapbase, XUARTPS_REGISTER_SPACE,
+					 XUARTPS_NAME)) {
+		return -ENOMEM;
+	}
+
+	port->membase = ioremap(port->mapbase, XUARTPS_REGISTER_SPACE);
+	if (!port->membase) {
+		dev_err(port->dev, "Unable to map registers\n");
+		release_mem_region(port->mapbase, XUARTPS_REGISTER_SPACE);
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+/**
+ * xuartps_release_port - Release the memory region attached to a xuartps
+ *				port, called when the driver removes a xuartps
+ *				port via uart_remove_one_port().
+ * @port: Handle to the uart port structure
+ *
+ **/
+static void xuartps_release_port(struct uart_port *port)
+{
+	release_mem_region(port->mapbase, XUARTPS_REGISTER_SPACE);
+	iounmap(port->membase);
+	port->membase = NULL;
+}
+
+/**
+ * xuartps_config_port - Configure xuartps, called when the driver adds a
+ *				xuartps port
+ * @port: Handle to the uart port structure
+ * @flags: If any
+ *
+ **/
+static void xuartps_config_port(struct uart_port *port, int flags)
+{
+	if (flags & UART_CONFIG_TYPE && xuartps_request_port(port) == 0)
+		port->type = PORT_XUARTPS;
+}
+
+/**
+ * xuartps_get_mctrl - Get the modem control state
+ *
+ * @port: Handle to the uart port structure
+ *
+ * Returns the modem control state
+ *
+ **/
+static unsigned int xuartps_get_mctrl(struct uart_port *port)
+{
+	return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+}
+
+static void xuartps_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+	/* N/A */
+}
+
+static void xuartps_enable_ms(struct uart_port *port)
+{
+	/* N/A */
+}
+
+/** The UART operations structure
+ */
+static struct uart_ops xuartps_ops = {
+	.set_mctrl	= xuartps_set_mctrl,
+	.get_mctrl	= xuartps_get_mctrl,
+	.enable_ms	= xuartps_enable_ms,
+
+	.start_tx	= xuartps_start_tx,	/* Start transmitting */
+	.stop_tx	= xuartps_stop_tx,	/* Stop transmission */
+	.stop_rx	= xuartps_stop_rx,	/* Stop reception */
+	.tx_empty	= xuartps_tx_empty,	/* Transmitter busy? */
+	.break_ctl	= xuartps_break_ctl,	/* Start/stop
+						 * transmitting break
+						 */
+	.set_termios	= xuartps_set_termios,	/* Set termios */
+	.startup	= xuartps_startup,	/* App opens xuartps */
+	.shutdown	= xuartps_shutdown,	/* App closes xuartps */
+	.type		= xuartps_type,		/* Set UART type */
+	.verify_port	= xuartps_verify_port,	/* Verification of port
+						 * params
+						 */
+	.request_port	= xuartps_request_port,	/* Claim resources
+						 * associated with a
+						 * xuartps port
+						 */
+	.release_port	= xuartps_release_port,	/* Release resources
+						 * associated with a
+						 * xuartps port
+						 */
+	.config_port	= xuartps_config_port,	/* Configure when driver
+						 * adds a xuartps port
+						 */
+};
+
+static struct uart_port xuartps_port[2];
+
+/**
+ * xuartps_get_port - Configure the port from the platform device resource
+ *			info
+ *
+ * Returns a pointer to a uart_port or NULL for failure
+ **/
+static struct uart_port *xuartps_get_port(void)
+{
+	struct uart_port *port;
+	int id;
+
+	/* Find the next unused port */
+	for (id = 0; id < XUARTPS_NR_PORTS; id++)
+		if (xuartps_port[id].mapbase == 0)
+			break;
+
+	if (id >= XUARTPS_NR_PORTS)
+		return NULL;
+
+	port = &xuartps_port[id];
+
+	/* At this point, we've got an empty uart_port struct, initialize it */
+	spin_lock_init(&port->lock);
+	port->membase	= NULL;
+	port->iobase	= 1; /* mark port in use */
+	port->irq	= 0;
+	port->type	= PORT_UNKNOWN;
+	port->iotype	= UPIO_MEM32;
+	port->flags	= UPF_BOOT_AUTOCONF;
+	port->ops	= &xuartps_ops;
+	port->fifosize	= XUARTPS_FIFO_SIZE;
+	port->line	= id;
+	port->dev	= NULL;
+	return port;
+}
+
+/*-----------------------Console driver operations--------------------------*/
+
+#ifdef CONFIG_SERIAL_XILINX_PS_UART_CONSOLE
+/**
+ * xuartps_console_wait_tx - Wait for the TX to be full
+ * @port: Handle to the uart port structure
+ *
+ **/
+static void xuartps_console_wait_tx(struct uart_port *port)
+{
+	while ((xuartps_readl(XUARTPS_SR_OFFSET) & XUARTPS_SR_TXEMPTY)
+				!= XUARTPS_SR_TXEMPTY)
+		barrier();
+}
+
+/**
+ * xuartps_console_putchar - write the character to the FIFO buffer
+ * @port: Handle to the uart port structure
+ * @ch: Character to be written
+ *
+ **/
+static void xuartps_console_putchar(struct uart_port *port, int ch)
+{
+	xuartps_console_wait_tx(port);
+	xuartps_writel(ch, XUARTPS_FIFO_OFFSET);
+}
+
+/**
+ * xuartps_console_write - perform write operation
+ * @port: Handle to the uart port structure
+ * @s: Pointer to character array
+ * @count: No of characters
+ **/
+static void xuartps_console_write(struct console *co, const char *s,
+				unsigned int count)
+{
+	struct uart_port *port = &xuartps_port[co->index];
+	unsigned long flags;
+	unsigned int imr;
+	int locked = 1;
+
+	if (oops_in_progress)
+		locked = spin_trylock_irqsave(&port->lock, flags);
+	else
+		spin_lock_irqsave(&port->lock, flags);
+
+	/* save and disable interrupt */
+	imr = xuartps_readl(XUARTPS_IMR_OFFSET);
+	xuartps_writel(imr, XUARTPS_IDR_OFFSET);
+
+	uart_console_write(port, s, count, xuartps_console_putchar);
+	xuartps_console_wait_tx(port);
+
+	/* restore interrupt state, it seems like there may be a h/w bug
+	 * in that the interrupt enable register should not need to be
+	 * written based on the data sheet
+	 */
+	xuartps_writel(~imr, XUARTPS_IDR_OFFSET);
+	xuartps_writel(imr, XUARTPS_IER_OFFSET);
+
+	if (locked)
+		spin_unlock_irqrestore(&port->lock, flags);
+}
+
+/**
+ * xuartps_console_setup - Initialize the uart to default config
+ * @co: Console handle
+ * @options: Initial settings of uart
+ *
+ * Returns 0, -ENODEV if no device
+ **/
+static int __init xuartps_console_setup(struct console *co, char *options)
+{
+	struct uart_port *port = &xuartps_port[co->index];
+	int baud = 9600;
+	int bits = 8;
+	int parity = 'n';
+	int flow = 'n';
+
+	if (co->index < 0 || co->index >= XUARTPS_NR_PORTS)
+		return -EINVAL;
+
+	if (!port->mapbase) {
+		pr_debug("console on ttyPS%i not present\n", co->index);
+		return -ENODEV;
+	}
+
+	if (options)
+		uart_parse_options(options, &baud, &parity, &bits, &flow);
+
+	return uart_set_options(port, co, baud, parity, bits, flow);
+}
+
+static struct uart_driver xuartps_uart_driver;
+
+static struct console xuartps_console = {
+	.name	= XUARTPS_TTY_NAME,
+	.write	= xuartps_console_write,
+	.device	= uart_console_device,
+	.setup	= xuartps_console_setup,
+	.flags	= CON_PRINTBUFFER,
+	.index	= -1, /* Specified on the cmdline (e.g. console=ttyPS ) */
+	.data	= &xuartps_uart_driver,
+};
+
+/**
+ * xuartps_console_init - Initialization call
+ *
+ * Returns 0 on success, negative error otherwise
+ **/
+static int __init xuartps_console_init(void)
+{
+	register_console(&xuartps_console);
+	return 0;
+}
+
+console_initcall(xuartps_console_init);
+
+#endif /* CONFIG_SERIAL_XILINX_PS_UART_CONSOLE */
+
+/** Structure Definitions
+ */
+static struct uart_driver xuartps_uart_driver = {
+	.owner		= THIS_MODULE,		/* Owner */
+	.driver_name	= XUARTPS_NAME,		/* Driver name */
+	.dev_name	= XUARTPS_TTY_NAME,	/* Node name */
+	.major		= XUARTPS_MAJOR,	/* Major number */
+	.minor		= XUARTPS_MINOR,	/* Minor number */
+	.nr		= XUARTPS_NR_PORTS,	/* Number of UART ports */
+#ifdef CONFIG_SERIAL_XILINX_PS_UART_CONSOLE
+	.cons		= &xuartps_console,	/* Console */
+#endif
+};
+
+/* ---------------------------------------------------------------------
+ * Platform bus binding
+ */
+/**
+ * xuartps_probe - Platform driver probe
+ * @pdev: Pointer to the platform device structure
+ *
+ * Returns 0 on success, negative error otherwise
+ **/
+static int __devinit xuartps_probe(struct platform_device *pdev)
+{
+	int rc;
+	struct uart_port *port;
+	struct resource *res, *res2;
+	int clk = 0;
+
+#ifdef CONFIG_OF
+	const unsigned int *prop;
+
+	prop = of_get_property(pdev->dev.of_node, "clock", NULL);
+	if (prop)
+		clk = be32_to_cpup(prop);
+#else
+	clk = *((unsigned int *)(pdev->dev.platform_data));
+#endif
+	if (!clk) {
+		dev_err(&pdev->dev, "no clock specified\n");
+		return -ENODEV;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
+	res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!res2)
+		return -ENODEV;
+
+	/* Initialize the port structure */
+	port = xuartps_get_port();
+
+	if (!port) {
+		dev_err(&pdev->dev, "Cannot get uart_port structure\n");
+		return -ENODEV;
+	} else {
+		/* Register the port.
+		 * This function also registers this device with the tty layer
+		 * and triggers invocation of the config_port() entry point.
+		 */
+		port->mapbase = res->start;
+		port->irq = res2->start;
+		port->dev = &pdev->dev;
+		port->uartclk = clk;
+		dev_set_drvdata(&pdev->dev, port);
+		rc = uart_add_one_port(&xuartps_uart_driver, port);
+		if (rc) {
+			dev_err(&pdev->dev,
+				"uart_add_one_port() failed; err=%i\n", rc);
+			dev_set_drvdata(&pdev->dev, NULL);
+			return rc;
+		}
+		return 0;
+	}
+}
+
+/**
+ * xuartps_remove - called when the platform driver is unregistered
+ * @pdev: Pointer to the platform device structure
+ *
+ * Returns 0 on success, negative error otherwise
+ **/
+static int __devexit xuartps_remove(struct platform_device *pdev)
+{
+	struct uart_port *port = dev_get_drvdata(&pdev->dev);
+	int rc = 0;
+
+	/* Remove the xuartps port from the serial core */
+	if (port) {
+		rc = uart_remove_one_port(&xuartps_uart_driver, port);
+		dev_set_drvdata(&pdev->dev, NULL);
+		port->mapbase = 0;
+	}
+	return rc;
+}
+
+/**
+ * xuartps_suspend - suspend event
+ * @pdev: Pointer to the platform device structure
+ * @state: State of the device
+ *
+ * Returns 0
+ **/
+static int xuartps_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	/* Call the API provided in serial_core.c file which handles
+	 * the suspend.
+	 */
+	uart_suspend_port(&xuartps_uart_driver, &xuartps_port[pdev->id]);
+	return 0;
+}
+
+/**
+ * xuartps_resume - Resume after a previous suspend
+ * @pdev: Pointer to the platform device structure
+ *
+ * Returns 0
+ **/
+static int xuartps_resume(struct platform_device *pdev)
+{
+	uart_resume_port(&xuartps_uart_driver, &xuartps_port[pdev->id]);
+	return 0;
+}
+
+/* Match table for of_platform binding */
+
+#ifdef CONFIG_OF
+static struct of_device_id xuartps_of_match[] __devinitdata = {
+	{ .compatible = "xlnx,xuartps", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, xuartps_of_match);
+#else
+#define xuartps_of_match NULL
+#endif
+
+static struct platform_driver xuartps_platform_driver = {
+	.probe   = xuartps_probe,		/* Probe method */
+	.remove  = __exit_p(xuartps_remove),	/* Detach method */
+	.suspend = xuartps_suspend,		/* Suspend */
+	.resume  = xuartps_resume,		/* Resume after a suspend */
+	.driver  = {
+		.owner = THIS_MODULE,
+		.name = XUARTPS_NAME,		/* Driver name */
+		.of_match_table = xuartps_of_match,
+		},
+};
+
+/* ---------------------------------------------------------------------
+ * Module Init and Exit
+ */
+/**
+ * xuartps_init - Initial driver registration call
+ *
+ * Returns whether the registration was successful or not
+ **/
+static int __init xuartps_init(void)
+{
+	int retval = 0;
+
+	/* Register the xuartps driver with the serial core */
+	retval = uart_register_driver(&xuartps_uart_driver);
+	if (retval)
+		return retval;
+
+	/* Register the platform driver */
+	retval = platform_driver_register(&xuartps_platform_driver);
+	if (retval)
+		uart_unregister_driver(&xuartps_uart_driver);
+
+	return retval;
+}
+
+/**
+ * xuartps_exit - Driver unregistration call
+ **/
+static void __exit xuartps_exit(void)
+{
+	/* The order of unregistration is important. Unregister the
+	 * UART driver before the platform driver crashes the system.
+	 */
+
+	/* Unregister the platform driver */
+	platform_driver_unregister(&xuartps_platform_driver);
+
+	/* Unregister the xuartps driver */
+	uart_unregister_driver(&xuartps_uart_driver);
+}
+
+module_init(xuartps_init);
+module_exit(xuartps_exit);
+
+MODULE_DESCRIPTION("Driver for PS UART");
+MODULE_AUTHOR("Xilinx Inc.");
+MODULE_LICENSE("GPL");
diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c
index 27da23d98e3f..272e417a9b0d 100644
--- a/drivers/tty/synclink.c
+++ b/drivers/tty/synclink.c
@@ -1,6 +1,4 @@
 /*
- * linux/drivers/char/synclink.c
- *
  * $Id: synclink.c,v 4.38 2005/11/07 16:30:34 paulkf Exp $
  *
  * Device driver for Microgate SyncLink ISA and PCI
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index f1a7918d71aa..46de2e075dac 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -416,6 +416,7 @@ static void flush_to_ldisc(struct work_struct *work)
 		struct tty_buffer *head, *tail = tty->buf.tail;
 		int seen_tail = 0;
 		while ((head = tty->buf.head) != NULL) {
+			int copied;
 			int count;
 			char *char_buf;
 			unsigned char *flag_buf;
@@ -442,17 +443,19 @@ static void flush_to_ldisc(struct work_struct *work)
 			   line discipline as we want to empty the queue */
 			if (test_bit(TTY_FLUSHPENDING, &tty->flags))
 				break;
-			if (!tty->receive_room || seen_tail)
-				break;
-			if (count > tty->receive_room)
-				count = tty->receive_room;
 			char_buf = head->char_buf_ptr + head->read;
 			flag_buf = head->flag_buf_ptr + head->read;
-			head->read += count;
 			spin_unlock_irqrestore(&tty->buf.lock, flags);
-			disc->ops->receive_buf(tty, char_buf,
+			copied = disc->ops->receive_buf(tty, char_buf,
 							flag_buf, count);
 			spin_lock_irqsave(&tty->buf.lock, flags);
+
+			head->read += copied;
+
+			if (copied == 0 || seen_tail) {
+				schedule_work(&tty->buf.work);
+				break;
+			}
 		}
 		clear_bit(TTY_FLUSHING, &tty->flags);
 	}
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index d7d50b48287e..6556f7452ba6 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/tty_io.c
- *
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
 
@@ -964,12 +962,14 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
 }
 
 void tty_write_unlock(struct tty_struct *tty)
+	__releases(&tty->atomic_write_lock)
 {
 	mutex_unlock(&tty->atomic_write_lock);
 	wake_up_interruptible_poll(&tty->write_wait, POLLOUT);
 }
 
 int tty_write_lock(struct tty_struct *tty, int ndelay)
+	__acquires(&tty->atomic_write_lock)
 {
 	if (!mutex_trylock(&tty->atomic_write_lock)) {
 		if (ndelay)
@@ -1391,16 +1391,15 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
 		return ERR_PTR(-ENODEV);
 
 	tty = alloc_tty_struct();
-	if (!tty)
-		goto fail_no_mem;
+	if (!tty) {
+		retval = -ENOMEM;
+		goto err_module_put;
+	}
 	initialize_tty_struct(tty, driver, idx);
 
 	retval = tty_driver_install_tty(driver, tty);
-	if (retval < 0) {
-		free_tty_struct(tty);
-		module_put(driver->owner);
-		return ERR_PTR(retval);
-	}
+	if (retval < 0)
+		goto err_deinit_tty;
 
 	/*
 	 * Structures all installed ... call the ldisc open routines.
@@ -1409,15 +1408,18 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
 	 */
 	retval = tty_ldisc_setup(tty, tty->link);
 	if (retval)
-		goto release_mem_out;
+		goto err_release_tty;
 	return tty;
 
-fail_no_mem:
+err_deinit_tty:
+	deinitialize_tty_struct(tty);
+	free_tty_struct(tty);
+err_module_put:
 	module_put(driver->owner);
-	return ERR_PTR(-ENOMEM);
+	return ERR_PTR(retval);
 
 	/* call the tty release_tty routine to clean out this slot */
-release_mem_out:
+err_release_tty:
 	if (printk_ratelimit())
 		printk(KERN_INFO "tty_init_dev: ldisc open failed, "
 				 "clearing slot %d\n", idx);
@@ -1892,6 +1894,7 @@ got_driver:
 	retval = tty_add_file(tty, filp);
 	if (retval) {
 		tty_unlock();
+		tty_release(inode, filp);
 		return retval;
 	}
 
@@ -1902,12 +1905,10 @@ got_driver:
 #ifdef TTY_DEBUG_HANGUP
 	printk(KERN_DEBUG "opening %s...", tty->name);
 #endif
-	if (!retval) {
-		if (tty->ops->open)
-			retval = tty->ops->open(tty, filp);
-		else
-			retval = -ENODEV;
-	}
+	if (tty->ops->open)
+		retval = tty->ops->open(tty, filp);
+	else
+		retval = -ENODEV;
 	filp->f_flags = saved_flags;
 
 	if (!retval && test_bit(TTY_EXCLUSIVE, &tty->flags) &&
@@ -2888,6 +2889,20 @@ void initialize_tty_struct(struct tty_struct *tty,
 }
 
 /**
+ *	deinitialize_tty_struct
+ *	@tty: tty to deinitialize
+ *
+ *	This subroutine deinitializes a tty structure that has been newly
+ *	allocated but tty_release cannot be called on that yet.
+ *
+ *	Locking: none - tty in question must not be exposed at this point
+ */
+void deinitialize_tty_struct(struct tty_struct *tty)
+{
+	tty_ldisc_deinit(tty);
+}
+
+/**
  *	tty_put_char	-	write one character to a tty
  *	@tty: tty
  *	@ch: character
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 620c971422b6..53f2442c6099 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/tty_ioctl.c
- *
  *  Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
  *
  * Modified by Fred N. van Kempen, 01/29/93, to add line disciplines
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index e19e13647116..5d01d32e2cf0 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -956,6 +956,19 @@ void tty_ldisc_init(struct tty_struct *tty)
 	tty_ldisc_assign(tty, ld);
 }
 
+/**
+ *	tty_ldisc_init		-	ldisc cleanup for new tty
+ *	@tty: tty that was allocated recently
+ *
+ *	The tty structure must not becompletely set up (tty_ldisc_setup) when
+ *      this call is made.
+ */
+void tty_ldisc_deinit(struct tty_struct *tty)
+{
+	put_ldisc(tty->ldisc);
+	tty_ldisc_assign(tty, NULL);
+}
+
 void tty_ldisc_begin(void)
 {
 	/* Setup the default TTY line discipline. */
diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c
index 133697540c73..3b2bb7719442 100644
--- a/drivers/tty/tty_mutex.c
+++ b/drivers/tty/tty_mutex.c
@@ -1,6 +1,3 @@
-/*
- * drivers/char/tty_lock.c
- */
 #include <linux/tty.h>
 #include <linux/module.h>
 #include <linux/kallsyms.h>
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
index d6b342b5b423..3761ccf0f340 100644
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -1,6 +1,4 @@
 /*
- * linux/drivers/char/keyboard.c
- *
  * Written for linux by Johan Myreen as a translation from
  * the assembly version by Linus (with diacriticals added)
  *
diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c
index adf0ad2a8851..67b1d0d7c8ac 100644
--- a/drivers/tty/vt/selection.c
+++ b/drivers/tty/vt/selection.c
@@ -1,6 +1,4 @@
 /*
- * linux/drivers/char/selection.c
- *
  * This module exports the functions:
  *
  *     'int set_selection(struct tiocl_selection __user *, struct tty_struct *)'
@@ -334,8 +332,7 @@ int paste_selection(struct tty_struct *tty)
 			continue;
 		}
 		count = sel_buffer_lth - pasted;
-		count = min(count, tty->receive_room);
-		tty->ldisc->ops->receive_buf(tty, sel_buffer + pasted,
+		count = tty->ldisc->ops->receive_buf(tty, sel_buffer + pasted,
 								NULL, count);
 		pasted += count;
 	}
diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c
index 1564261e80c8..66825c9f516a 100644
--- a/drivers/tty/vt/vc_screen.c
+++ b/drivers/tty/vt/vc_screen.c
@@ -1,6 +1,4 @@
 /*
- * linux/drivers/char/vc_screen.c
- *
  * Provide access to virtual console memory.
  * /dev/vcs0: the screen as it is being viewed right now (possibly scrolled)
  * /dev/vcsN: the screen of /dev/ttyN (1 <= N <= 63)
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 4bea1efaec98..b3915b7ad3e2 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/vt.c
- *
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
 
@@ -858,7 +856,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
 {
 	unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
 	unsigned long end;
-	unsigned int old_cols, old_rows, old_row_size, old_screen_size;
+	unsigned int old_rows, old_row_size;
 	unsigned int new_cols, new_rows, new_row_size, new_screen_size;
 	unsigned int user;
 	unsigned short *newscreen;
@@ -887,9 +885,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
 		return -ENOMEM;
 
 	old_rows = vc->vc_rows;
-	old_cols = vc->vc_cols;
 	old_row_size = vc->vc_size_row;
-	old_screen_size = vc->vc_screenbuf_size;
 
 	err = resize_screen(vc, new_cols, new_rows, user);
 	if (err) {
@@ -1197,6 +1193,13 @@ static void csi_J(struct vc_data *vc, int vpar)
 					      vc->vc_x + 1);
 			}
 			break;
+		case 3: /* erase scroll-back buffer (and whole display) */
+			scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
+				    vc->vc_screenbuf_size >> 1);
+			set_origin(vc);
+			if (CON_IS_VISIBLE(vc))
+				update_screen(vc);
+			/* fall through */
 		case 2: /* erase whole display */
 			count = vc->vc_cols * vc->vc_rows;
 			start = (unsigned short *)vc->vc_origin;
diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index 937d17219984..5e096f43bcea 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/char/vt_ioctl.c
- *
  *  Copyright (C) 1992 obz under the linux copyright
  *
  *  Dynamic diacritical handling - aeb@cwi.nl - Dec 1993
@@ -698,10 +696,23 @@ int vt_ioctl(struct tty_struct *tty,
 		break;
 
 	case KDGKBMODE:
-		uival = ((kbd->kbdmode == VC_RAW) ? K_RAW :
-				 (kbd->kbdmode == VC_MEDIUMRAW) ? K_MEDIUMRAW :
-				 (kbd->kbdmode == VC_UNICODE) ? K_UNICODE :
-				 K_XLATE);
+		switch (kbd->kbdmode) {
+		case VC_RAW:
+			uival = K_RAW;
+			break;
+		case VC_MEDIUMRAW:
+			uival = K_MEDIUMRAW;
+			break;
+		case VC_UNICODE:
+			uival = K_UNICODE;
+			break;
+		case VC_OFF:
+			uival = K_OFF;
+			break;
+		default:
+			uival = K_XLATE;
+			break;
+		}
 		goto setint;
 
 	/* this could be folded into KDSKBMODE, but for compatibility
@@ -1499,7 +1510,6 @@ long vt_compat_ioctl(struct tty_struct *tty,
 {
 	struct vc_data *vc = tty->driver_data;
 	struct console_font_op op;	/* used in multiple places here */
-	struct kbd_struct *kbd;
 	unsigned int console;
 	void __user *up = (void __user *)arg;
 	int perm;
@@ -1522,7 +1532,6 @@ long vt_compat_ioctl(struct tty_struct *tty,
 	if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG))
 		perm = 1;
 
-	kbd = kbd_table + console;
 	switch (cmd) {
 	/*
 	 * these need special handlers for incompatible data structures
author	Linus Torvalds	2011-05-23 12:23:20 -0700
committer	Linus Torvalds	2011-05-23 12:23:20 -0700
commit	99dff5856220a02b8711f2e8746413ea6e53ccf6 (patch)
tree	d8bae7ccdf8f7ad5221b053bb74a6220df996b3a /drivers/tty
parent	bb74e8ca352eecefdc5c1a9ebab01f18aa2f6f3c (diff)
parent	d9a0fbfd7bc5d2c42f0fa9bcbdab62c4942d0388 (diff)