Merge tag 'tty-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial patches from Greg Kroah-Hartman:
 "Here's the big tty/serial driver patches for 3.9-rc1.

  More tty port rework and fixes from Jiri here, as well as lots of
  individual serial driver updates and fixes.

  All of these have been in the linux-next tree for a while."

* tag 'tty-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (140 commits)
  tty: mxser: improve error handling in mxser_probe() and mxser_module_init()
  serial: imx: fix uninitialized variable warning
  serial: tegra: assume CONFIG_OF
  TTY: do not update atime/mtime on read/write
  lguest: select CONFIG_TTY to build properly.
  ARM defconfigs: add missing inclusions of linux/platform_device.h
  fb/exynos: include platform_device.h
  ARM: sa1100/assabet: include platform_device.h directly
  serial: imx: Fix recursive locking bug
  pps: Fix build breakage from decoupling pps from tty
  tty: Remove ancient hardpps()
  pps: Additional cleanups in uart_handle_dcd_change
  pps: Move timestamp read into PPS code proper
  pps: Don't crash the machine when exiting will do
  pps: Fix a use-after free bug when unregistering a source.
  pps: Use pps_lookup_dev to reduce ldisc coupling
  pps: Add pps_lookup_dev() function
  tty: serial: uartlite: Support uartlite on big and little endian systems
  tty: serial: uartlite: Fix sparse and checkpatch warnings
  serial/arc-uart: Miscll DT related updates (Grant's review comments)
  ...

Fix up trivial conflicts, mostly just due to the TTY config option
clashing with the EXPERIMENTAL removal.

15 files changed, 129 insertions, 63 deletions

diff --git a/include/linux/console.h b/include/linux/console.h
index dedb082fe50f..3b709da1786e 100644
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -157,7 +157,12 @@ extern int is_console_locked(void);
 extern int braille_register_console(struct console *, int index,
 		char *console_options, char *braille_options);
 extern int braille_unregister_console(struct console *);
+#ifdef CONFIG_TTY
 extern void console_sysfs_notify(void);
+#else
+static inline void console_sysfs_notify(void)
+{ }
+#endif
 extern bool console_suspend_enabled;
 
 /* Suspend and resume console messages over PM events */
diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h
index 4dff0c6ed58f..c6e091bf39a5 100644
--- a/include/linux/kgdb.h
+++ b/include/linux/kgdb.h
@@ -13,7 +13,6 @@
 #ifndef _KGDB_H_
 #define _KGDB_H_
 
-#include <linux/serial_8250.h>
 #include <linux/linkage.h>
 #include <linux/init.h>
 #include <linux/atomic.h>
diff --git a/include/linux/of_serial.h b/include/linux/of_serial.h
deleted file mode 100644
index 4a73ed80b4c0..000000000000
--- a/include/linux/of_serial.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef __LINUX_OF_SERIAL_H
-#define __LINUX_OF_SERIAL_H
-
-/*
- * FIXME remove this file when tegra finishes conversion to open firmware,
- * expectation is that all quirks will then be self-contained in
- * drivers/tty/serial/of_serial.c.
- */
-#ifdef CONFIG_ARCH_TEGRA
-extern void tegra_serial_handle_break(struct uart_port *port);
-#else
-static inline void tegra_serial_handle_break(struct uart_port *port)
-{
-}
-#endif
-
-#endif /* __LINUX_OF_SERIAL */
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 6938ccfa42d5..31717bd287fd 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -1870,8 +1870,23 @@
 #define PCI_VENDOR_ID_QUATECH		0x135C
 #define PCI_DEVICE_ID_QUATECH_QSC100	0x0010
 #define PCI_DEVICE_ID_QUATECH_DSC100	0x0020
+#define PCI_DEVICE_ID_QUATECH_DSC200	0x0030
+#define PCI_DEVICE_ID_QUATECH_QSC200	0x0040
 #define PCI_DEVICE_ID_QUATECH_ESC100D	0x0050
 #define PCI_DEVICE_ID_QUATECH_ESC100M	0x0060
+#define PCI_DEVICE_ID_QUATECH_QSCP100	0x0120
+#define PCI_DEVICE_ID_QUATECH_DSCP100	0x0130
+#define PCI_DEVICE_ID_QUATECH_QSCP200	0x0140
+#define PCI_DEVICE_ID_QUATECH_DSCP200	0x0150
+#define PCI_DEVICE_ID_QUATECH_QSCLP100	0x0170
+#define PCI_DEVICE_ID_QUATECH_DSCLP100	0x0180
+#define PCI_DEVICE_ID_QUATECH_DSC100E	0x0181
+#define PCI_DEVICE_ID_QUATECH_SSCLP100	0x0190
+#define PCI_DEVICE_ID_QUATECH_QSCLP200	0x01A0
+#define PCI_DEVICE_ID_QUATECH_DSCLP200	0x01B0
+#define PCI_DEVICE_ID_QUATECH_DSC200E	0x01B1
+#define PCI_DEVICE_ID_QUATECH_SSCLP200	0x01C0
+#define PCI_DEVICE_ID_QUATECH_ESCLP100	0x01E0
 #define PCI_DEVICE_ID_QUATECH_SPPXP_100 0x0278
 
 #define PCI_VENDOR_ID_SEALEVEL		0x135e
diff --git a/include/linux/platform_data/s3c-hsotg.h b/include/linux/platform_data/s3c-hsotg.h
index 8b79e0967f9c..3f1cbf95ec3b 100644
--- a/include/linux/platform_data/s3c-hsotg.h
+++ b/include/linux/platform_data/s3c-hsotg.h
@@ -15,6 +15,8 @@
 #ifndef __LINUX_USB_S3C_HSOTG_H
 #define __LINUX_USB_S3C_HSOTG_H
 
+struct platform_device;
+
 enum s3c_hsotg_dmamode {
 	S3C_HSOTG_DMA_NONE,	/* do not use DMA at-all */
 	S3C_HSOTG_DMA_ONLY,	/* always use DMA */
diff --git a/include/linux/platform_data/sccnxp.h b/include/linux/platform_data/serial-sccnxp.h
index 7311ccd3217f..215574d1e81d 100644
--- a/include/linux/platform_data/sccnxp.h
+++ b/include/linux/platform_data/serial-sccnxp.h
@@ -11,8 +11,8 @@
  *  (at your option) any later version.
  */
 
-#ifndef __SCCNXP_H
-#define __SCCNXP_H
+#ifndef _PLATFORM_DATA_SERIAL_SCCNXP_H_
+#define _PLATFORM_DATA_SERIAL_SCCNXP_H_
 
 #define SCCNXP_MAX_UARTS	2
 
@@ -84,6 +84,8 @@ struct sccnxp_pdata {
 	const u8		reg_shift;
 	/* Modem control lines configuration */
 	const u32		mctrl_cfg[SCCNXP_MAX_UARTS];
+	/* Timer value for polling mode (usecs) */
+	const unsigned int	poll_time_us;
 	/* Called during startup */
 	void (*init)(void);
 	/* Called before finish */
diff --git a/include/linux/pps_kernel.h b/include/linux/pps_kernel.h
index 0cc45ae1afd5..7db3eb93a079 100644
--- a/include/linux/pps_kernel.h
+++ b/include/linux/pps_kernel.h
@@ -43,7 +43,7 @@ struct pps_source_info {
 			int event, void *data);	/* PPS echo function */
 
 	struct module *owner;
-	struct device *dev;
+	struct device *dev;		/* Parent device for device_create */
 };
 
 struct pps_event_time {
@@ -69,6 +69,7 @@ struct pps_device {
 	wait_queue_head_t queue;		/* PPS event queue */
 
 	unsigned int id;			/* PPS source unique ID */
+	void const *lookup_cookie;		/* pps_lookup_dev only */
 	struct cdev cdev;
 	struct device *dev;
 	struct fasync_struct *async_queue;	/* fasync method */
@@ -82,16 +83,26 @@ struct pps_device {
 extern struct device_attribute pps_attrs[];
 
 /*
+ * Internal functions.
+ *
+ * These are not actually part of the exported API, but this is a
+ * convenient header file to put them in.
+ */
+
+extern int pps_register_cdev(struct pps_device *pps);
+extern void pps_unregister_cdev(struct pps_device *pps);
+
+/*
  * Exported functions
  */
 
 extern struct pps_device *pps_register_source(
 		struct pps_source_info *info, int default_params);
 extern void pps_unregister_source(struct pps_device *pps);
-extern int pps_register_cdev(struct pps_device *pps);
-extern void pps_unregister_cdev(struct pps_device *pps);
 extern void pps_event(struct pps_device *pps,
 		struct pps_event_time *ts, int event, void *data);
+/* Look up a pps device by magic cookie */
+struct pps_device *pps_lookup_dev(void const *cookie);
 
 static inline void timespec_to_pps_ktime(struct pps_ktime *kt,
 		struct timespec ts)
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index d0a1f2ca1c3f..8307f2f94d86 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -127,7 +127,12 @@ extern void pid_ns_release_proc(struct pid_namespace *ns);
  * proc_tty.c
  */
 struct tty_driver;
+#ifdef CONFIG_TTY
 extern void proc_tty_init(void);
+#else
+static inline void proc_tty_init(void)
+{ }
+#endif
 extern void proc_tty_register_driver(struct tty_driver *driver);
 extern void proc_tty_unregister_driver(struct tty_driver *driver);
 
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index c490d20b3fb8..af47a8af6024 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -59,6 +59,8 @@ enum {
 	PLAT8250_DEV_SM501,
 };
 
+struct uart_8250_dma;
+
 /*
  * This should be used by drivers which want to register
  * their own 8250 ports without registering their own
@@ -91,6 +93,8 @@ struct uart_8250_port {
 #define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
 	unsigned char		msr_saved_flags;
 
+	struct uart_8250_dma	*dma;
+
 	/* 8250 specific callbacks */
 	int			(*dl_read)(struct uart_8250_port *);
 	void			(*dl_write)(struct uart_8250_port *, int);
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index c6690a2a27fb..87d4bbc773fc 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -29,7 +29,6 @@
 #include <linux/tty.h>
 #include <linux/mutex.h>
 #include <linux/sysrq.h>
-#include <linux/pps_kernel.h>
 #include <uapi/linux/serial_core.h>
 
 struct uart_port;
@@ -37,8 +36,8 @@ struct serial_struct;
 struct device;
 
 /*
- * This structure describes all the operations that can be
- * done on the physical hardware.
+ * This structure describes all the operations that can be done on the
+ * physical hardware.  See Documentation/serial/driver for details.
  */
 struct uart_ops {
 	unsigned int	(*tx_empty)(struct uart_port *);
@@ -65,7 +64,7 @@ struct uart_ops {
 	/*
 	 * Return a string describing the type of the port
 	 */
-	const char *(*type)(struct uart_port *);
+	const char	*(*type)(struct uart_port *);
 
 	/*
 	 * Release IO and memory resources used by the port.
@@ -83,7 +82,7 @@ struct uart_ops {
 	int		(*ioctl)(struct uart_port *, unsigned int, unsigned long);
 #ifdef CONFIG_CONSOLE_POLL
 	int		(*poll_init)(struct uart_port *);
-	void	(*poll_put_char)(struct uart_port *, unsigned char);
+	void		(*poll_put_char)(struct uart_port *, unsigned char);
 	int		(*poll_get_char)(struct uart_port *);
 #endif
 };
@@ -134,9 +133,8 @@ struct uart_port {
 #define UPIO_HUB6		(1)
 #define UPIO_MEM		(2)
 #define UPIO_MEM32		(3)
-#define UPIO_AU			(4)			/* Au1x00 type IO */
+#define UPIO_AU			(4)			/* Au1x00 and RT288x type IO */
 #define UPIO_TSI		(5)			/* Tsi108/109 type IO */
-#define UPIO_RM9000		(6)			/* RM9000 type IO */
 
 	unsigned int		read_status_mask;	/* driver specific */
 	unsigned int		ignore_status_mask;	/* driver specific */
@@ -208,13 +206,25 @@ static inline void serial_port_out(struct uart_port *up, int offset, int value)
 	up->serial_out(up, offset, value);
 }
 
+/**
+ * enum uart_pm_state - power states for UARTs
+ * @UART_PM_STATE_ON: UART is powered, up and operational
+ * @UART_PM_STATE_OFF: UART is powered off
+ * @UART_PM_STATE_UNDEFINED: sentinel
+ */
+enum uart_pm_state {
+	UART_PM_STATE_ON = 0,
+	UART_PM_STATE_OFF = 3, /* number taken from ACPI */
+	UART_PM_STATE_UNDEFINED,
+};
+
 /*
  * This is the state information which is persistent across opens.
  */
 struct uart_state {
 	struct tty_port		port;
 
-	int			pm_state;
+	enum uart_pm_state	pm_state;
 	struct circ_buf		xmit;
 
 	struct uart_port	*uart_port;
diff --git a/include/linux/sunserialcore.h b/include/linux/sunserialcore.h
index 68e7430bb0fe..dbe4d7fca1b8 100644
--- a/include/linux/sunserialcore.h
+++ b/include/linux/sunserialcore.h
@@ -13,6 +13,10 @@
 #ifndef _SERIAL_SUN_H
 #define _SERIAL_SUN_H
 
+#include <linux/device.h>
+#include <linux/serial_core.h>
+#include <linux/console.h>
+
 /* Serial keyboard defines for L1-A processing... */
 #define SUNKBD_RESET		0xff
 #define SUNKBD_L1		0x01
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 8db1b569c37a..c75d886b0307 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -202,7 +202,8 @@ struct tty_port {
 	unsigned long		iflags;		/* TTYP_ internal flags */
 #define TTYP_FLUSHING			1  /* Flushing to ldisc in progress */
 #define TTYP_FLUSHPENDING		2  /* Queued buffer flush pending */
-	unsigned char		console:1;	/* port is a console */
+	unsigned char		console:1,	/* port is a console */
+				low_latency:1;	/* direct buffer flush */
 	struct mutex		mutex;		/* Locking */
 	struct mutex		buf_mutex;	/* Buffer alloc lock */
 	unsigned char		*xmit_buf;	/* Optional buffer */
@@ -254,7 +255,7 @@ struct tty_struct {
 	int count;
 	struct winsize winsize;		/* termios mutex */
 	unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
-	unsigned char low_latency:1, warned:1;
+	unsigned char warned:1;
 	unsigned char ctrl_status;	/* ctrl_lock */
 	unsigned int receive_room;	/* Bytes free for queue */
 
@@ -317,11 +318,43 @@ struct tty_file_private {
 
 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
 
+#ifdef CONFIG_TTY
+extern void console_init(void);
+extern void tty_kref_put(struct tty_struct *tty);
+extern struct pid *tty_get_pgrp(struct tty_struct *tty);
+extern void tty_vhangup_self(void);
+extern void disassociate_ctty(int priv);
+extern dev_t tty_devnum(struct tty_struct *tty);
+extern void proc_clear_tty(struct task_struct *p);
+extern struct tty_struct *get_current_tty(void);
+/* tty_io.c */
+extern int __init tty_init(void);
+#else
+static inline void console_init(void)
+{ }
+static inline void tty_kref_put(struct tty_struct *tty)
+{ }
+static inline struct pid *tty_get_pgrp(struct tty_struct *tty)
+{ return NULL; }
+static inline void tty_vhangup_self(void)
+{ }
+static inline void disassociate_ctty(int priv)
+{ }
+static inline dev_t tty_devnum(struct tty_struct *tty)
+{ return 0; }
+static inline void proc_clear_tty(struct task_struct *p)
+{ }
+static inline struct tty_struct *get_current_tty(void)
+{ return NULL; }
+/* tty_io.c */
+static inline int __init tty_init(void)
+{ return 0; }
+#endif
+
 extern void tty_write_flush(struct tty_struct *);
 
 extern struct ktermios tty_std_termios;
 
-extern void console_init(void);
 extern int vcs_init(void);
 
 extern struct class *tty_class;
@@ -341,7 +374,6 @@ static inline struct tty_struct *tty_kref_get(struct tty_struct *tty)
 		kref_get(&tty->kref);
 	return tty;
 }
-extern void tty_kref_put(struct tty_struct *tty);
 
 extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
 			      const char *routine);
@@ -373,20 +405,16 @@ extern void tty_driver_remove_tty(struct tty_driver *driver,
 				  struct tty_struct *tty);
 extern void tty_free_termios(struct tty_struct *tty);
 extern int is_current_pgrp_orphaned(void);
-extern struct pid *tty_get_pgrp(struct tty_struct *tty);
 extern int is_ignored(int sig);
 extern int tty_signal(int sig, struct tty_struct *tty);
 extern void tty_hangup(struct tty_struct *tty);
 extern void tty_vhangup(struct tty_struct *tty);
 extern void tty_vhangup_locked(struct tty_struct *tty);
-extern void tty_vhangup_self(void);
 extern void tty_unhangup(struct file *filp);
 extern int tty_hung_up_p(struct file *filp);
 extern void do_SAK(struct tty_struct *tty);
 extern void __do_SAK(struct tty_struct *tty);
-extern void disassociate_ctty(int priv);
 extern void no_tty(void);
-extern void tty_flip_buffer_push(struct tty_struct *tty);
 extern void tty_flush_to_ldisc(struct tty_struct *tty);
 extern void tty_buffer_free_all(struct tty_port *port);
 extern void tty_buffer_flush(struct tty_struct *tty);
@@ -415,9 +443,6 @@ extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file,
 			unsigned int cmd, unsigned long arg);
 extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg);
-extern dev_t tty_devnum(struct tty_struct *tty);
-extern void proc_clear_tty(struct task_struct *p);
-extern struct tty_struct *get_current_tty(void);
 extern void tty_default_fops(struct file_operations *fops);
 extern struct tty_struct *alloc_tty_struct(void);
 extern int tty_alloc_file(struct file *file);
@@ -543,9 +568,6 @@ static inline int tty_audit_push_task(struct task_struct *tsk,
 }
 #endif
 
-/* tty_io.c */
-extern int __init tty_init(void);
-
 /* tty_ioctl.c */
 extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
 		       unsigned int cmd, unsigned long arg);
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index dd976cfb6131..756a60989294 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -40,6 +40,7 @@
  * void (*close)(struct tty_struct * tty, struct file * filp);
  *
  * 	This routine is called when a particular tty device is closed.
+ *	Note: called even if the corresponding open() failed.
  *
  *	Required method.
  *
diff --git a/include/linux/tty_flip.h b/include/linux/tty_flip.h
index 2002344ed36a..e0f252633b47 100644
--- a/include/linux/tty_flip.h
+++ b/include/linux/tty_flip.h
@@ -1,28 +1,34 @@
 #ifndef _LINUX_TTY_FLIP_H
 #define _LINUX_TTY_FLIP_H
 
-extern int tty_buffer_request_room(struct tty_struct *tty, size_t size);
-extern int tty_insert_flip_string_flags(struct tty_struct *tty, const unsigned char *chars, const char *flags, size_t size);
-extern int tty_insert_flip_string_fixed_flag(struct tty_struct *tty, const unsigned char *chars, char flag, size_t size);
-extern int tty_prepare_flip_string(struct tty_struct *tty, unsigned char **chars, size_t size);
-extern int tty_prepare_flip_string_flags(struct tty_struct *tty, unsigned char **chars, char **flags, size_t size);
-void tty_schedule_flip(struct tty_struct *tty);
+extern int tty_buffer_request_room(struct tty_port *port, size_t size);
+extern int tty_insert_flip_string_flags(struct tty_port *port,
+		const unsigned char *chars, const char *flags, size_t size);
+extern int tty_insert_flip_string_fixed_flag(struct tty_port *port,
+		const unsigned char *chars, char flag, size_t size);
+extern int tty_prepare_flip_string(struct tty_port *port,
+		unsigned char **chars, size_t size);
+extern int tty_prepare_flip_string_flags(struct tty_port *port,
+		unsigned char **chars, char **flags, size_t size);
+extern void tty_flip_buffer_push(struct tty_port *port);
+void tty_schedule_flip(struct tty_port *port);
 
-static inline int tty_insert_flip_char(struct tty_struct *tty,
+static inline int tty_insert_flip_char(struct tty_port *port,
 					unsigned char ch, char flag)
 {
-	struct tty_buffer *tb = tty->port->buf.tail;
+	struct tty_buffer *tb = port->buf.tail;
 	if (tb && tb->used < tb->size) {
 		tb->flag_buf_ptr[tb->used] = flag;
 		tb->char_buf_ptr[tb->used++] = ch;
 		return 1;
 	}
-	return tty_insert_flip_string_flags(tty, &ch, &flag, 1);
+	return tty_insert_flip_string_flags(port, &ch, &flag, 1);
 }
 
-static inline int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars, size_t size)
+static inline int tty_insert_flip_string(struct tty_port *port,
+		const unsigned char *chars, size_t size)
 {
-	return tty_insert_flip_string_fixed_flag(tty, chars, TTY_NORMAL, size);
+	return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size);
 }
 
 #endif /* _LINUX_TTY_FLIP_H */
diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h
index fb79dd8d1537..455a0d7bf220 100644
--- a/include/linux/tty_ldisc.h
+++ b/include/linux/tty_ldisc.h
@@ -100,16 +100,14 @@
  *	seek to perform this action quickly but should wait until
  *	any pending driver I/O is completed.
  *
- * void (*dcd_change)(struct tty_struct *tty, unsigned int status,
- *			struct pps_event_time *ts)
+ * void (*dcd_change)(struct tty_struct *tty, unsigned int status)
  *
- *	Tells the discipline that the DCD pin has changed its status and
- *	the relative timestamp. Pointer ts cannot be NULL.
+ *	Tells the discipline that the DCD pin has changed its status.
+ *	Used exclusively by the N_PPS (Pulse-Per-Second) line discipline.
  */
 
 #include <linux/fs.h>
 #include <linux/wait.h>
-#include <linux/pps_kernel.h>
 #include <linux/wait.h>
 
 struct tty_ldisc_ops {
@@ -144,8 +142,7 @@ struct tty_ldisc_ops {
 	void	(*receive_buf)(struct tty_struct *, const unsigned char *cp,
 			       char *fp, int count);
 	void	(*write_wakeup)(struct tty_struct *);
-	void	(*dcd_change)(struct tty_struct *, unsigned int,
-				struct pps_event_time *);
+	void	(*dcd_change)(struct tty_struct *, unsigned int);
 
 	struct  module *owner;