1 files changed, 279 insertions, 0 deletions
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
new file mode 100644
index 000000000000..b368b296d035
--- /dev/null
+++ b/include/linux/tty_driver.h
@@ -0,0 +1,279 @@
+#ifndef _LINUX_TTY_DRIVER_H
+#define _LINUX_TTY_DRIVER_H
+/*
+ * This structure defines the interface between the low-level tty
+ * driver and the tty routines.  The following routines can be
+ * defined; unless noted otherwise, they are optional, and can be
+ * filled in with a null pointer.
+ *
+ * int  (*open)(struct tty_struct * tty, struct file * filp);
+ *
+ *      This routine is called when a particular tty device is opened.
+ *      This routine is mandatory; if this routine is not filled in,
+ *      the attempted open will fail with ENODEV.
+ *     
+ * void (*close)(struct tty_struct * tty, struct file * filp);
+ *
+ *      This routine is called when a particular tty device is closed.
+ *
+ * int (*write)(struct tty_struct * tty,
+ *               const unsigned char *buf, int count);
+ *
+ *      This routine is called by the kernel to write a series of
+ *      characters to the tty device.  The characters may come from
+ *      user space or kernel space.  This routine will return the
+ *      number of characters actually accepted for writing.  This
+ *      routine is mandatory.
+ *
+ * void (*put_char)(struct tty_struct *tty, unsigned char ch);
+ *
+ *      This routine is called by the kernel to write a single
+ *      character to the tty device.  If the kernel uses this routine,
+ *      it must call the flush_chars() routine (if defined) when it is
+ *      done stuffing characters into the driver.  If there is no room
+ *      in the queue, the character is ignored.
+ *
+ * void (*flush_chars)(struct tty_struct *tty);
+ *
+ *      This routine is called by the kernel after it has written a
+ *      series of characters to the tty device using put_char().  
+ * 
+ * int  (*write_room)(struct tty_struct *tty);
+ *
+ *      This routine returns the numbers of characters the tty driver
+ *      will accept for queuing to be written.  This number is subject
+ *      to change as output buffers get emptied, or if the output flow
+ *      control is acted.
+ * 
+ * int  (*ioctl)(struct tty_struct *tty, struct file * file,
+ *          unsigned int cmd, unsigned long arg);
+ *
+ *      This routine allows the tty driver to implement
+ *      device-specific ioctl's.  If the ioctl number passed in cmd
+ *      is not recognized by the driver, it should return ENOIOCTLCMD.
+ * 
+ * void (*set_termios)(struct tty_struct *tty, struct termios * old);
+ *
+ *      This routine allows the tty driver to be notified when
+ *      device's termios settings have changed.  Note that a
+ *      well-designed tty driver should be prepared to accept the case
+ *      where old == NULL, and try to do something rational.
+ *
+ * void (*set_ldisc)(struct tty_struct *tty);
+ *
+ *      This routine allows the tty driver to be notified when the
+ *      device's termios settings have changed.
+ * 
+ * void (*throttle)(struct tty_struct * tty);
+ *
+ *      This routine notifies the tty driver that input buffers for
+ *      the line discipline are close to full, and it should somehow
+ *      signal that no more characters should be sent to the tty.
+ * 
+ * void (*unthrottle)(struct tty_struct * tty);
+ *
+ *      This routine notifies the tty drivers that it should signals
+ *      that characters can now be sent to the tty without fear of
+ *      overrunning the input buffers of the line disciplines.
+ * 
+ * void (*stop)(struct tty_struct *tty);
+ *
+ *      This routine notifies the tty driver that it should stop
+ *      outputting characters to the tty device.  
+ * 
+ * void (*start)(struct tty_struct *tty);
+ *
+ *      This routine notifies the tty driver that it resume sending
+ *      characters to the tty device.
+ * 
+ * void (*hangup)(struct tty_struct *tty);
+ *
+ *      This routine notifies the tty driver that it should hangup the
+ *      tty device.
+ *
+ * void (*break_ctl)(struct tty_stuct *tty, int state);
+ *
+ *      This optional routine requests the tty driver to turn on or
+ *      off BREAK status on the RS-232 port.  If state is -1,
+ *      then the BREAK status should be turned on; if state is 0, then
+ *      BREAK should be turned off.
+ *
+ *      If this routine is implemented, the high-level tty driver will
+ *      handle the following ioctls: TCSBRK, TCSBRKP, TIOCSBRK,
+ *      TIOCCBRK.  Otherwise, these ioctls will be passed down to the
+ *      driver to handle.
+ *
+ * void (*wait_until_sent)(struct tty_struct *tty, int timeout);
+ * 
+ *      This routine waits until the device has written out all of the
+ *      characters in its transmitter FIFO.
+ *
+ * void (*send_xchar)(struct tty_struct *tty, char ch);
+ *
+ *      This routine is used to send a high-priority XON/XOFF
+ *      character to the device.
+ */
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/cdev.h>
+struct tty_struct;
+struct tty_operations {
+        int  (*open)(struct tty_struct * tty, struct file * filp);
+        void (*close)(struct tty_struct * tty, struct file * filp);
+        int  (*write)(struct tty_struct * tty,
+                      const unsigned char *buf, int count);
+        void (*put_char)(struct tty_struct *tty, unsigned char ch);
+        void (*flush_chars)(struct tty_struct *tty);
+        int  (*write_room)(struct tty_struct *tty);
+        int  (*chars_in_buffer)(struct tty_struct *tty);
+        int  (*ioctl)(struct tty_struct *tty, struct file * file,
+                    unsigned int cmd, unsigned long arg);
+        void (*set_termios)(struct tty_struct *tty, struct termios * old);
+        void (*throttle)(struct tty_struct * tty);
+        void (*unthrottle)(struct tty_struct * tty);
+        void (*stop)(struct tty_struct *tty);
+        void (*start)(struct tty_struct *tty);
+        void (*hangup)(struct tty_struct *tty);
+        void (*break_ctl)(struct tty_struct *tty, int state);
+        void (*flush_buffer)(struct tty_struct *tty);
+        void (*set_ldisc)(struct tty_struct *tty);
+        void (*wait_until_sent)(struct tty_struct *tty, int timeout);
+        void (*send_xchar)(struct tty_struct *tty, char ch);
+        int (*read_proc)(char *page, char **start, off_t off,
+                          int count, int *eof, void *data);
+        int (*write_proc)(struct file *file, const char __user *buffer,
+                          unsigned long count, void *data);
+        int (*tiocmget)(struct tty_struct *tty, struct file *file);
+        int (*tiocmset)(struct tty_struct *tty, struct file *file,
+                        unsigned int set, unsigned int clear);
+};
+struct tty_driver {
+        int     magic;          /* magic number for this structure */
+        struct cdev cdev;
+        struct module   *owner;
+        const char      *driver_name;
+        const char      *devfs_name;
+        const char      *name;
+        int     name_base;      /* offset of printed name */
+        int     major;          /* major device number */
+        int     minor_start;    /* start of minor device number */
+        int     minor_num;      /* number of *possible* devices */
+        int     num;            /* number of devices allocated */
+        short   type;           /* type of tty driver */
+        short   subtype;        /* subtype of tty driver */
+        struct termios init_termios; /* Initial termios */
+        int     flags;          /* tty driver flags */
+        int     refcount;       /* for loadable tty drivers */
+        struct proc_dir_entry *proc_entry; /* /proc fs entry */
+        struct tty_driver *other; /* only used for the PTY driver */
+        /*
+         * Pointer to the tty data structures
+         */
+        struct tty_struct **ttys;
+        struct termios **termios;
+        struct termios **termios_locked;
+        void *driver_state;     /* only used for the PTY driver */
+        
+        /*
+         * Interface routines from the upper tty layer to the tty
+         * driver.      Will be replaced with struct tty_operations.
+         */
+        int  (*open)(struct tty_struct * tty, struct file * filp);
+        void (*close)(struct tty_struct * tty, struct file * filp);
+        int  (*write)(struct tty_struct * tty,
+                      const unsigned char *buf, int count);
+        void (*put_char)(struct tty_struct *tty, unsigned char ch);
+        void (*flush_chars)(struct tty_struct *tty);
+        int  (*write_room)(struct tty_struct *tty);
+        int  (*chars_in_buffer)(struct tty_struct *tty);
+        int  (*ioctl)(struct tty_struct *tty, struct file * file,
+                    unsigned int cmd, unsigned long arg);
+        void (*set_termios)(struct tty_struct *tty, struct termios * old);
+        void (*throttle)(struct tty_struct * tty);
+        void (*unthrottle)(struct tty_struct * tty);
+        void (*stop)(struct tty_struct *tty);
+        void (*start)(struct tty_struct *tty);
+        void (*hangup)(struct tty_struct *tty);
+        void (*break_ctl)(struct tty_struct *tty, int state);
+        void (*flush_buffer)(struct tty_struct *tty);
+        void (*set_ldisc)(struct tty_struct *tty);
+        void (*wait_until_sent)(struct tty_struct *tty, int timeout);
+        void (*send_xchar)(struct tty_struct *tty, char ch);
+        int (*read_proc)(char *page, char **start, off_t off,
+                          int count, int *eof, void *data);
+        int (*write_proc)(struct file *file, const char __user *buffer,
+                          unsigned long count, void *data);
+        int (*tiocmget)(struct tty_struct *tty, struct file *file);
+        int (*tiocmset)(struct tty_struct *tty, struct file *file,
+                        unsigned int set, unsigned int clear);
+        struct list_head tty_drivers;
+};
+extern struct list_head tty_drivers;
+struct tty_driver *alloc_tty_driver(int lines);
+void put_tty_driver(struct tty_driver *driver);
+void tty_set_operations(struct tty_driver *driver, struct tty_operations *op);
+/* tty driver magic number */
+#define TTY_DRIVER_MAGIC                0x5402
+/*
+ * tty driver flags
+ * 
+ * TTY_DRIVER_RESET_TERMIOS --- requests the tty layer to reset the
+ *      termios setting when the last process has closed the device.
+ *      Used for PTY's, in particular.
+ * 
+ * TTY_DRIVER_REAL_RAW --- if set, indicates that the driver will
+ *      guarantee never not to set any special character handling
+ *      flags if ((IGNBRK || (!BRKINT && !PARMRK)) && (IGNPAR ||
+ *      !INPCK)).  That is, if there is no reason for the driver to
+ *      send notifications of parity and break characters up to the
+ *      line driver, it won't do so.  This allows the line driver to
+ *      optimize for this case if this flag is set.  (Note that there
+ *      is also a promise, if the above case is true, not to signal
+ *      overruns, either.)
+ *
+ * TTY_DRIVER_NO_DEVFS --- if set, do not create devfs entries. This
+ *      is only used by tty_register_driver().
+ *
+ * TTY_DRIVER_DEVPTS_MEM -- don't use the standard arrays, instead
+ *      use dynamic memory keyed through the devpts filesystem.  This
+ *      is only applicable to the pty driver.
+ */
+#define TTY_DRIVER_INSTALLED            0x0001
+#define TTY_DRIVER_RESET_TERMIOS        0x0002
+#define TTY_DRIVER_REAL_RAW             0x0004
+#define TTY_DRIVER_NO_DEVFS             0x0008
+#define TTY_DRIVER_DEVPTS_MEM           0x0010
+/* tty driver types */
+#define TTY_DRIVER_TYPE_SYSTEM          0x0001
+#define TTY_DRIVER_TYPE_CONSOLE         0x0002
+#define TTY_DRIVER_TYPE_SERIAL          0x0003
+#define TTY_DRIVER_TYPE_PTY             0x0004
+#define TTY_DRIVER_TYPE_SCC             0x0005  /* scc driver */
+#define TTY_DRIVER_TYPE_SYSCONS         0x0006
+/* system subtypes (magic, used by tty_io.c) */
+#define SYSTEM_TYPE_TTY                 0x0001
+#define SYSTEM_TYPE_CONSOLE             0x0002
+#define SYSTEM_TYPE_SYSCONS             0x0003
+#define SYSTEM_TYPE_SYSPTMX             0x0004
+/* pty subtypes (magic, used by tty_io.c) */
+#define PTY_TYPE_MASTER                 0x0001
+#define PTY_TYPE_SLAVE                  0x0002
+/* serial subtype definitions */
+#define SERIAL_TYPE_NORMAL      1
+#endif /* #ifdef _LINUX_TTY_DRIVER_H */

diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h new file mode 100644 index 000000000000..b368b296d035 --- /dev/null +++ b/include/linux/tty_driver.h
@@ -0,0 +1,279 @@
	1	#ifndef _LINUX_TTY_DRIVER_H
	2	#define _LINUX_TTY_DRIVER_H
	3
	4	/*
	5	* This structure defines the interface between the low-level tty
	6	* driver and the tty routines. The following routines can be
	7	* defined; unless noted otherwise, they are optional, and can be
	8	* filled in with a null pointer.
	9	*
	10	* int (open)(struct tty_struct tty, struct file * filp);
	11	*
	12	* This routine is called when a particular tty device is opened.
	13	* This routine is mandatory; if this routine is not filled in,
	14	* the attempted open will fail with ENODEV.
	15	*
	16	* void (close)(struct tty_struct tty, struct file * filp);
	17	*
	18	* This routine is called when a particular tty device is closed.
	19	*
	20	* int (write)(struct tty_struct tty,
	21	* const unsigned char *buf, int count);
	22	*
	23	* This routine is called by the kernel to write a series of
	24	* characters to the tty device. The characters may come from
	25	* user space or kernel space. This routine will return the
	26	* number of characters actually accepted for writing. This
	27	* routine is mandatory.
	28	*
	29	* void (put_char)(struct tty_struct tty, unsigned char ch);
	30	*
	31	* This routine is called by the kernel to write a single
	32	* character to the tty device. If the kernel uses this routine,
	33	* it must call the flush_chars() routine (if defined) when it is
	34	* done stuffing characters into the driver. If there is no room
	35	* in the queue, the character is ignored.
	36	*
	37	* void (flush_chars)(struct tty_struct tty);
	38	*
	39	* This routine is called by the kernel after it has written a
	40	* series of characters to the tty device using put_char().
	41	*
	42	* int (write_room)(struct tty_struct tty);
	43	*
	44	* This routine returns the numbers of characters the tty driver
	45	* will accept for queuing to be written. This number is subject
	46	* to change as output buffers get emptied, or if the output flow
	47	* control is acted.
	48	*
	49	* int (ioctl)(struct tty_struct tty, struct file * file,
	50	* unsigned int cmd, unsigned long arg);
	51	*
	52	* This routine allows the tty driver to implement
	53	* device-specific ioctl's. If the ioctl number passed in cmd
	54	* is not recognized by the driver, it should return ENOIOCTLCMD.
	55	*
	56	* void (set_termios)(struct tty_struct tty, struct termios * old);
	57	*
	58	* This routine allows the tty driver to be notified when
	59	* device's termios settings have changed. Note that a
	60	* well-designed tty driver should be prepared to accept the case
	61	* where old == NULL, and try to do something rational.
	62	*
	63	* void (set_ldisc)(struct tty_struct tty);
	64	*
	65	* This routine allows the tty driver to be notified when the
	66	* device's termios settings have changed.
	67	*
	68	* void (throttle)(struct tty_struct tty);
	69	*
	70	* This routine notifies the tty driver that input buffers for
	71	* the line discipline are close to full, and it should somehow
	72	* signal that no more characters should be sent to the tty.
	73	*
	74	* void (unthrottle)(struct tty_struct tty);
	75	*
	76	* This routine notifies the tty drivers that it should signals
	77	* that characters can now be sent to the tty without fear of
	78	* overrunning the input buffers of the line disciplines.
	79	*
	80	* void (stop)(struct tty_struct tty);
	81	*
	82	* This routine notifies the tty driver that it should stop
	83	* outputting characters to the tty device.
	84	*
	85	* void (start)(struct tty_struct tty);
	86	*
	87	* This routine notifies the tty driver that it resume sending
	88	* characters to the tty device.
	89	*
	90	* void (hangup)(struct tty_struct tty);
	91	*
	92	* This routine notifies the tty driver that it should hangup the
	93	* tty device.
	94	*
	95	* void (break_ctl)(struct tty_stuct tty, int state);
	96	*
	97	* This optional routine requests the tty driver to turn on or
	98	* off BREAK status on the RS-232 port. If state is -1,
	99	* then the BREAK status should be turned on; if state is 0, then
	100	* BREAK should be turned off.
	101	*
	102	* If this routine is implemented, the high-level tty driver will
	103	* handle the following ioctls: TCSBRK, TCSBRKP, TIOCSBRK,
	104	* TIOCCBRK. Otherwise, these ioctls will be passed down to the
	105	* driver to handle.
	106	*
	107	* void (wait_until_sent)(struct tty_struct tty, int timeout);
	108	*
	109	* This routine waits until the device has written out all of the
	110	* characters in its transmitter FIFO.
	111	*
	112	* void (send_xchar)(struct tty_struct tty, char ch);
	113	*
	114	* This routine is used to send a high-priority XON/XOFF
	115	* character to the device.
	116	*/
	117
	118	#include <linux/fs.h>
	119	#include <linux/list.h>
	120	#include <linux/cdev.h>
	121
	122	struct tty_struct;
	123
	124	struct tty_operations {
	125	int (open)(struct tty_struct tty, struct file * filp);
	126	void (close)(struct tty_struct tty, struct file * filp);
	127	int (write)(struct tty_struct tty,
	128	const unsigned char *buf, int count);
	129	void (put_char)(struct tty_struct tty, unsigned char ch);
	130	void (flush_chars)(struct tty_struct tty);
	131	int (write_room)(struct tty_struct tty);
	132	int (chars_in_buffer)(struct tty_struct tty);
	133	int (ioctl)(struct tty_struct tty, struct file * file,
	134	unsigned int cmd, unsigned long arg);
	135	void (set_termios)(struct tty_struct tty, struct termios * old);
	136	void (throttle)(struct tty_struct tty);
	137	void (unthrottle)(struct tty_struct tty);
	138	void (stop)(struct tty_struct tty);
	139	void (start)(struct tty_struct tty);
	140	void (hangup)(struct tty_struct tty);
	141	void (break_ctl)(struct tty_struct tty, int state);
	142	void (flush_buffer)(struct tty_struct tty);
	143	void (set_ldisc)(struct tty_struct tty);
	144	void (wait_until_sent)(struct tty_struct tty, int timeout);
	145	void (send_xchar)(struct tty_struct tty, char ch);
	146	int (read_proc)(char page, char **start, off_t off,
	147	int count, int eof, void data);
	148	int (write_proc)(struct file file, const char __user *buffer,
	149	unsigned long count, void *data);
	150	int (tiocmget)(struct tty_struct tty, struct file *file);
	151	int (tiocmset)(struct tty_struct tty, struct file *file,
	152	unsigned int set, unsigned int clear);
	153	};
	154
	155	struct tty_driver {
	156	int magic; /* magic number for this structure */
	157	struct cdev cdev;
	158	struct module *owner;
	159	const char *driver_name;
	160	const char *devfs_name;
	161	const char *name;
	162	int name_base; /* offset of printed name */
	163	int major; /* major device number */
	164	int minor_start; /* start of minor device number */
	165	int minor_num; /* number of possible devices */
	166	int num; /* number of devices allocated */
	167	short type; /* type of tty driver */
	168	short subtype; /* subtype of tty driver */
	169	struct termios init_termios; /* Initial termios */
	170	int flags; /* tty driver flags */
	171	int refcount; /* for loadable tty drivers */
	172	struct proc_dir_entry proc_entry; / /proc fs entry */
	173	struct tty_driver other; / only used for the PTY driver */
	174
	175	/*
	176	* Pointer to the tty data structures
	177	*/
	178	struct tty_struct **ttys;
	179	struct termios **termios;
	180	struct termios **termios_locked;
	181	void driver_state; / only used for the PTY driver */
	182
	183	/*
	184	* Interface routines from the upper tty layer to the tty
	185	* driver. Will be replaced with struct tty_operations.
	186	*/
	187	int (open)(struct tty_struct tty, struct file * filp);
	188	void (close)(struct tty_struct tty, struct file * filp);
	189	int (write)(struct tty_struct tty,
	190	const unsigned char *buf, int count);
	191	void (put_char)(struct tty_struct tty, unsigned char ch);
	192	void (flush_chars)(struct tty_struct tty);
	193	int (write_room)(struct tty_struct tty);
	194	int (chars_in_buffer)(struct tty_struct tty);
	195	int (ioctl)(struct tty_struct tty, struct file * file,
	196	unsigned int cmd, unsigned long arg);
	197	void (set_termios)(struct tty_struct tty, struct termios * old);
	198	void (throttle)(struct tty_struct tty);
	199	void (unthrottle)(struct tty_struct tty);
	200	void (stop)(struct tty_struct tty);
	201	void (start)(struct tty_struct tty);
	202	void (hangup)(struct tty_struct tty);
	203	void (break_ctl)(struct tty_struct tty, int state);
	204	void (flush_buffer)(struct tty_struct tty);
	205	void (set_ldisc)(struct tty_struct tty);
	206	void (wait_until_sent)(struct tty_struct tty, int timeout);
	207	void (send_xchar)(struct tty_struct tty, char ch);
	208	int (read_proc)(char page, char **start, off_t off,
	209	int count, int eof, void data);
	210	int (write_proc)(struct file file, const char __user *buffer,
	211	unsigned long count, void *data);
	212	int (tiocmget)(struct tty_struct tty, struct file *file);
	213	int (tiocmset)(struct tty_struct tty, struct file *file,
	214	unsigned int set, unsigned int clear);
	215
	216	struct list_head tty_drivers;
	217	};
	218
	219	extern struct list_head tty_drivers;
	220
	221	struct tty_driver *alloc_tty_driver(int lines);
	222	void put_tty_driver(struct tty_driver *driver);
	223	void tty_set_operations(struct tty_driver driver, struct tty_operations op);
	224
	225	/* tty driver magic number */
	226	#define TTY_DRIVER_MAGIC 0x5402
	227
	228	/*
	229	* tty driver flags
	230	*
	231	* TTY_DRIVER_RESET_TERMIOS --- requests the tty layer to reset the
	232	* termios setting when the last process has closed the device.
	233	* Used for PTY's, in particular.
	234	*
	235	* TTY_DRIVER_REAL_RAW --- if set, indicates that the driver will
	236	* guarantee never not to set any special character handling
	237	* flags if ((IGNBRK \|\| (!BRKINT && !PARMRK)) && (IGNPAR \|\|
	238	* !INPCK)). That is, if there is no reason for the driver to
	239	* send notifications of parity and break characters up to the
	240	* line driver, it won't do so. This allows the line driver to
	241	* optimize for this case if this flag is set. (Note that there
	242	* is also a promise, if the above case is true, not to signal
	243	* overruns, either.)
	244	*
	245	* TTY_DRIVER_NO_DEVFS --- if set, do not create devfs entries. This
	246	* is only used by tty_register_driver().
	247	*
	248	* TTY_DRIVER_DEVPTS_MEM -- don't use the standard arrays, instead
	249	* use dynamic memory keyed through the devpts filesystem. This
	250	* is only applicable to the pty driver.
	251	*/
	252	#define TTY_DRIVER_INSTALLED 0x0001
	253	#define TTY_DRIVER_RESET_TERMIOS 0x0002
	254	#define TTY_DRIVER_REAL_RAW 0x0004
	255	#define TTY_DRIVER_NO_DEVFS 0x0008
	256	#define TTY_DRIVER_DEVPTS_MEM 0x0010
	257
	258	/* tty driver types */
	259	#define TTY_DRIVER_TYPE_SYSTEM 0x0001
	260	#define TTY_DRIVER_TYPE_CONSOLE 0x0002
	261	#define TTY_DRIVER_TYPE_SERIAL 0x0003
	262	#define TTY_DRIVER_TYPE_PTY 0x0004
	263	#define TTY_DRIVER_TYPE_SCC 0x0005 /* scc driver */
	264	#define TTY_DRIVER_TYPE_SYSCONS 0x0006
	265
	266	/* system subtypes (magic, used by tty_io.c) */
	267	#define SYSTEM_TYPE_TTY 0x0001
	268	#define SYSTEM_TYPE_CONSOLE 0x0002
	269	#define SYSTEM_TYPE_SYSCONS 0x0003
	270	#define SYSTEM_TYPE_SYSPTMX 0x0004
	271
	272	/* pty subtypes (magic, used by tty_io.c) */
	273	#define PTY_TYPE_MASTER 0x0001
	274	#define PTY_TYPE_SLAVE 0x0002
	275
	276	/* serial subtype definitions */
	277	#define SERIAL_TYPE_NORMAL 1
	278
	279	#endif /* #ifdef _LINUX_TTY_DRIVER_H */