[linux-2.6-block.git] / include / linux / tty_driver.h

#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.
 *
 *	Required method.
 *     
 * void (*close)(struct tty_struct * tty, struct file * filp);
 *
 * 	This routine is called when a particular tty device is closed.
 *
 *	Required method.
 *
 * 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.
 *
 *	Optional: Required for writable devices.
 *
 * int (*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.
 *
 *	Optional: Kernel will use the write method if not provided.
 *
 *	Note: Do not call this function directly, call tty_put_char
 *
 * 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().  
 *
 *	Optional:
 *
 *	Note: Do not call this function directly, call tty_driver_flush_chars
 * 
 * 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.
 *
 *	Required if write method is provided else not needed.
 *
 *	Note: Do not call this function directly, call tty_write_room
 * 
 * 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.
 *
 *	Optional
 *
 * long (*compat_ioctl)(struct tty_struct *tty, struct file * file,
 * 	                unsigned int cmd, unsigned long arg);
 *
 * 	implement ioctl processing for 32 bit process on 64 bit system
 *
 *	Optional
 * 
 * void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
 *
 * 	This routine allows the tty driver to be notified when
 * 	device's termios settings have changed.
 *
 *	Optional: Called under the termios lock
 *
 *
 * void (*set_ldisc)(struct tty_struct *tty);
 *
 * 	This routine allows the tty driver to be notified when the
 * 	device's termios settings have changed.
 *
 *	Optional: Called under BKL (currently)
 * 
 * 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.  
 *
 *	Optional:
 *
 *	Note: Call stop_tty not this method.
 * 
 * void (*start)(struct tty_struct *tty);
 *
 * 	This routine notifies the tty driver that it resume sending
 *	characters to the tty device.
 *
 *	Optional:
 *
 *	Note: Call start_tty not this method.
 * 
 * void (*hangup)(struct tty_struct *tty);
 *
 * 	This routine notifies the tty driver that it should hangup the
 * 	tty device.
 *
 *	Required:
 *
 * 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.
 *
 *	Optional: Required for TCSBRK/BRKP/etc handling.
 *
 * 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.
 *
 *	Optional: If not provided the device is assumed to have no FIFO
 *
 *	Note: Usually correct to call tty_wait_until_sent
 *
 * void (*send_xchar)(struct tty_struct *tty, char ch);
 *
 * 	This routine is used to send a high-priority XON/XOFF
 * 	character to the device.
 *
 *	Optional: If not provided then the write method is called under
 *	the atomic write lock to keep it serialized with the ldisc.
 */

#include <linux/fs.h>
#include <linux/list.h>
#include <linux/cdev.h>

struct tty_struct;
struct tty_driver;

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);
	int  (*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);
	long (*compat_ioctl)(struct tty_struct *tty, struct file * file,
			     unsigned int cmd, unsigned long arg);
	void (*set_termios)(struct tty_struct *tty, struct ktermios * 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 (*tiocmget)(struct tty_struct *tty, struct file *file);
	int (*tiocmset)(struct tty_struct *tty, struct file *file,
			unsigned int set, unsigned int clear);
#ifdef CONFIG_CONSOLE_POLL
	int (*poll_init)(struct tty_driver *driver, int line, char *options);
	int (*poll_get_char)(struct tty_driver *driver, int line);
	void (*poll_put_char)(struct tty_driver *driver, int line, char ch);
#endif
};

struct tty_driver {
	int	magic;		/* magic number for this structure */
	struct cdev cdev;
	struct module	*owner;
	const char	*driver_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 ktermios 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 ktermios **termios;
	struct ktermios **termios_locked;
	void *driver_state;

	/*
	 * Driver methods
	 */

	const struct tty_operations *ops;
	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,
			const struct tty_operations *op);
extern struct tty_driver *tty_find_polling_driver(char *name, int *line);

/* 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_DYNAMIC_DEV --- if set, the individual tty devices need
 *	to be registered with a call to tty_register_driver() when the
 *	device is found in the system and unregistered with a call to
 *	tty_unregister_device() so the devices will be show up
 *	properly in sysfs.  If not set, driver->num entries will be
 *	created by the tty core in sysfs when tty_register_driver() is
 *	called.  This is to be used by drivers that have tty devices
 *	that can appear and disappear while the main tty driver is
 *	registered with the tty core.
 *
 * 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_DYNAMIC_DEV		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 */
Commit	Line	Data
1da177e4 LT	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.
f34d7a5b AC	15	*
f34d7a5b AC	16	* Required method.
1da177e4 LT	17	*
	18	* void (close)(struct tty_struct tty, struct file * filp);
	19	*
	20	* This routine is called when a particular tty device is closed.
	21	*
f34d7a5b AC	22	* Required method.
f34d7a5b AC	23	*
1da177e4 LT	24	* int (write)(struct tty_struct tty,
	25	* const unsigned char *buf, int count);
	26	*
	27	* This routine is called by the kernel to write a series of
	28	* characters to the tty device. The characters may come from
	29	* user space or kernel space. This routine will return the
	30	* number of characters actually accepted for writing. This
	31	* routine is mandatory.
	32	*
f34d7a5b AC	33	* Optional: Required for writable devices.
	34	*
	35	* int (put_char)(struct tty_struct tty, unsigned char ch);
1da177e4 LT	36	*
	37	* This routine is called by the kernel to write a single
	38	* character to the tty device. If the kernel uses this routine,
	39	* it must call the flush_chars() routine (if defined) when it is
	40	* done stuffing characters into the driver. If there is no room
	41	* in the queue, the character is ignored.
	42	*
f34d7a5b AC	43	* Optional: Kernel will use the write method if not provided.
	44	*
	45	* Note: Do not call this function directly, call tty_put_char
	46	*
1da177e4 LT	47	* void (flush_chars)(struct tty_struct tty);
	48	*
	49	* This routine is called by the kernel after it has written a
	50	* series of characters to the tty device using put_char().
f34d7a5b AC	51	*
	52	* Optional:
	53	*
	54	* Note: Do not call this function directly, call tty_driver_flush_chars
1da177e4 LT	55	*
	56	* int (write_room)(struct tty_struct tty);
	57	*
	58	* This routine returns the numbers of characters the tty driver
	59	* will accept for queuing to be written. This number is subject
	60	* to change as output buffers get emptied, or if the output flow
	61	* control is acted.
f34d7a5b AC	62	*
	63	* Required if write method is provided else not needed.
	64	*
	65	* Note: Do not call this function directly, call tty_write_room
1da177e4 LT	66	*
	67	* int (ioctl)(struct tty_struct tty, struct file * file,
	68	* unsigned int cmd, unsigned long arg);
	69	*
	70	* This routine allows the tty driver to implement
	71	* device-specific ioctl's. If the ioctl number passed in cmd
	72	* is not recognized by the driver, it should return ENOIOCTLCMD.
e10cc1df	73	*
f34d7a5b AC	74	* Optional
f34d7a5b AC	75	*
e10cc1df PF	76	* long (compat_ioctl)(struct tty_struct tty, struct file * file,
	77	* unsigned int cmd, unsigned long arg);
	78	*
	79	* implement ioctl processing for 32 bit process on 64 bit system
f34d7a5b AC	80	*
f34d7a5b AC	81	* Optional
1da177e4	82	*
edc6afc5	83	* void (set_termios)(struct tty_struct tty, struct ktermios * old);
1da177e4 LT	84	*
1da177e4 LT	85	* This routine allows the tty driver to be notified when
f34d7a5b AC	86	* device's termios settings have changed.
	87	*
	88	* Optional: Called under the termios lock
	89	*
1da177e4 LT	90	*
	91	* void (set_ldisc)(struct tty_struct tty);
	92	*
	93	* This routine allows the tty driver to be notified when the
	94	* device's termios settings have changed.
f34d7a5b AC	95	*
f34d7a5b AC	96	* Optional: Called under BKL (currently)
1da177e4 LT	97	*
	98	* void (throttle)(struct tty_struct tty);
	99	*
	100	* This routine notifies the tty driver that input buffers for
	101	* the line discipline are close to full, and it should somehow
	102	* signal that no more characters should be sent to the tty.
	103	*
	104	* void (unthrottle)(struct tty_struct tty);
	105	*
	106	* This routine notifies the tty drivers that it should signals
	107	* that characters can now be sent to the tty without fear of
	108	* overrunning the input buffers of the line disciplines.
	109	*
	110	* void (stop)(struct tty_struct tty);
	111	*
	112	* This routine notifies the tty driver that it should stop
	113	* outputting characters to the tty device.
f34d7a5b AC	114	*
	115	* Optional:
	116	*
	117	* Note: Call stop_tty not this method.
1da177e4 LT	118	*
	119	* void (start)(struct tty_struct tty);
	120	*
	121	* This routine notifies the tty driver that it resume sending
	122	* characters to the tty device.
f34d7a5b AC	123	*
	124	* Optional:
	125	*
	126	* Note: Call start_tty not this method.
1da177e4 LT	127	*
	128	* void (hangup)(struct tty_struct tty);
	129	*
	130	* This routine notifies the tty driver that it should hangup the
	131	* tty device.
	132	*
f34d7a5b AC	133	* Required:
f34d7a5b AC	134	*
1da177e4 LT	135	* void (break_ctl)(struct tty_stuct tty, int state);
	136	*
	137	* This optional routine requests the tty driver to turn on or
	138	* off BREAK status on the RS-232 port. If state is -1,
	139	* then the BREAK status should be turned on; if state is 0, then
	140	* BREAK should be turned off.
	141	*
	142	* If this routine is implemented, the high-level tty driver will
	143	* handle the following ioctls: TCSBRK, TCSBRKP, TIOCSBRK,
f34d7a5b AC	144	* TIOCCBRK.
	145	*
	146	* Optional: Required for TCSBRK/BRKP/etc handling.
1da177e4 LT	147	*
	148	* void (wait_until_sent)(struct tty_struct tty, int timeout);
	149	*
	150	* This routine waits until the device has written out all of the
	151	* characters in its transmitter FIFO.
	152	*
f34d7a5b AC	153	* Optional: If not provided the device is assumed to have no FIFO
	154	*
	155	* Note: Usually correct to call tty_wait_until_sent
	156	*
1da177e4 LT	157	* void (send_xchar)(struct tty_struct tty, char ch);
	158	*
	159	* This routine is used to send a high-priority XON/XOFF
	160	* character to the device.
f34d7a5b AC	161	*
	162	* Optional: If not provided then the write method is called under
	163	* the atomic write lock to keep it serialized with the ldisc.
1da177e4 LT	164	*/
	165
	166	#include <linux/fs.h>
	167	#include <linux/list.h>
	168	#include <linux/cdev.h>
	169
	170	struct tty_struct;
f2d937f3	171	struct tty_driver;
1da177e4 LT	172
	173	struct tty_operations {
	174	int (open)(struct tty_struct tty, struct file * filp);
	175	void (close)(struct tty_struct tty, struct file * filp);
	176	int (write)(struct tty_struct tty,
	177	const unsigned char *buf, int count);
f34d7a5b	178	int (put_char)(struct tty_struct tty, unsigned char ch);
1da177e4 LT	179	void (flush_chars)(struct tty_struct tty);
	180	int (write_room)(struct tty_struct tty);
	181	int (chars_in_buffer)(struct tty_struct tty);
	182	int (ioctl)(struct tty_struct tty, struct file * file,
	183	unsigned int cmd, unsigned long arg);
e10cc1df PF	184	long (compat_ioctl)(struct tty_struct tty, struct file * file,
e10cc1df PF	185	unsigned int cmd, unsigned long arg);
edc6afc5	186	void (set_termios)(struct tty_struct tty, struct ktermios * old);
1da177e4 LT	187	void (throttle)(struct tty_struct tty);
	188	void (unthrottle)(struct tty_struct tty);
	189	void (stop)(struct tty_struct tty);
	190	void (start)(struct tty_struct tty);
	191	void (hangup)(struct tty_struct tty);
	192	void (break_ctl)(struct tty_struct tty, int state);
	193	void (flush_buffer)(struct tty_struct tty);
	194	void (set_ldisc)(struct tty_struct tty);
	195	void (wait_until_sent)(struct tty_struct tty, int timeout);
	196	void (send_xchar)(struct tty_struct tty, char ch);
	197	int (read_proc)(char page, char **start, off_t off,
	198	int count, int eof, void data);
1da177e4 LT	199	int (tiocmget)(struct tty_struct tty, struct file *file);
	200	int (tiocmset)(struct tty_struct tty, struct file *file,
	201	unsigned int set, unsigned int clear);
f2d937f3 JW	202	#ifdef CONFIG_CONSOLE_POLL
	203	int (poll_init)(struct tty_driver driver, int line, char *options);
	204	int (poll_get_char)(struct tty_driver driver, int line);
	205	void (poll_put_char)(struct tty_driver driver, int line, char ch);
	206	#endif
1da177e4 LT	207	};
	208
	209	struct tty_driver {
	210	int magic; /* magic number for this structure */
	211	struct cdev cdev;
	212	struct module *owner;
	213	const char *driver_name;
1da177e4 LT	214	const char *name;
	215	int name_base; /* offset of printed name */
	216	int major; /* major device number */
	217	int minor_start; /* start of minor device number */
	218	int minor_num; /* number of possible devices */
	219	int num; /* number of devices allocated */
	220	short type; /* type of tty driver */
	221	short subtype; /* subtype of tty driver */
edc6afc5	222	struct ktermios init_termios; /* Initial termios */
1da177e4 LT	223	int flags; /* tty driver flags */
	224	int refcount; /* for loadable tty drivers */
	225	struct proc_dir_entry proc_entry; / /proc fs entry */
	226	struct tty_driver other; / only used for the PTY driver */
	227
	228	/*
	229	* Pointer to the tty data structures
	230	*/
	231	struct tty_struct **ttys;
edc6afc5 AC	232	struct ktermios **termios;
edc6afc5 AC	233	struct ktermios **termios_locked;
f34d7a5b AC	234	void *driver_state;
f34d7a5b AC	235
1da177e4	236	/*
f34d7a5b	237	* Driver methods
1da177e4	238	*/
1da177e4	239
f34d7a5b	240	const struct tty_operations *ops;
1da177e4 LT	241	struct list_head tty_drivers;
	242	};
	243
	244	extern struct list_head tty_drivers;
	245
	246	struct tty_driver *alloc_tty_driver(int lines);
	247	void put_tty_driver(struct tty_driver *driver);
b68e31d0 JD	248	void tty_set_operations(struct tty_driver *driver,
b68e31d0 JD	249	const struct tty_operations *op);
f2d937f3	250	extern struct tty_driver tty_find_polling_driver(char name, int *line);
1da177e4 LT	251
	252	/* tty driver magic number */
	253	#define TTY_DRIVER_MAGIC 0x5402
	254
	255	/*
	256	* tty driver flags
	257	*
	258	* TTY_DRIVER_RESET_TERMIOS --- requests the tty layer to reset the
	259	* termios setting when the last process has closed the device.
	260	* Used for PTY's, in particular.
	261	*
	262	* TTY_DRIVER_REAL_RAW --- if set, indicates that the driver will
	263	* guarantee never not to set any special character handling
	264	* flags if ((IGNBRK \|\| (!BRKINT && !PARMRK)) && (IGNPAR \|\|
	265	* !INPCK)). That is, if there is no reason for the driver to
	266	* send notifications of parity and break characters up to the
	267	* line driver, it won't do so. This allows the line driver to
	268	* optimize for this case if this flag is set. (Note that there
	269	* is also a promise, if the above case is true, not to signal
	270	* overruns, either.)
	271	*
331b8319 GKH	272	* TTY_DRIVER_DYNAMIC_DEV --- if set, the individual tty devices need
	273	* to be registered with a call to tty_register_driver() when the
	274	* device is found in the system and unregistered with a call to
	275	* tty_unregister_device() so the devices will be show up
	276	* properly in sysfs. If not set, driver->num entries will be
	277	* created by the tty core in sysfs when tty_register_driver() is
	278	* called. This is to be used by drivers that have tty devices
	279	* that can appear and disappear while the main tty driver is
	280	* registered with the tty core.
1da177e4 LT	281	*
	282	* TTY_DRIVER_DEVPTS_MEM -- don't use the standard arrays, instead
	283	* use dynamic memory keyed through the devpts filesystem. This
	284	* is only applicable to the pty driver.
	285	*/
	286	#define TTY_DRIVER_INSTALLED 0x0001
	287	#define TTY_DRIVER_RESET_TERMIOS 0x0002
	288	#define TTY_DRIVER_REAL_RAW 0x0004
331b8319	289	#define TTY_DRIVER_DYNAMIC_DEV 0x0008
1da177e4 LT	290	#define TTY_DRIVER_DEVPTS_MEM 0x0010
	291
	292	/* tty driver types */
	293	#define TTY_DRIVER_TYPE_SYSTEM 0x0001
	294	#define TTY_DRIVER_TYPE_CONSOLE 0x0002
	295	#define TTY_DRIVER_TYPE_SERIAL 0x0003
	296	#define TTY_DRIVER_TYPE_PTY 0x0004
	297	#define TTY_DRIVER_TYPE_SCC 0x0005 /* scc driver */
	298	#define TTY_DRIVER_TYPE_SYSCONS 0x0006
	299
	300	/* system subtypes (magic, used by tty_io.c) */
	301	#define SYSTEM_TYPE_TTY 0x0001
	302	#define SYSTEM_TYPE_CONSOLE 0x0002
	303	#define SYSTEM_TYPE_SYSCONS 0x0003
	304	#define SYSTEM_TYPE_SYSPTMX 0x0004
	305
	306	/* pty subtypes (magic, used by tty_io.c) */
	307	#define PTY_TYPE_MASTER 0x0001
	308	#define PTY_TYPE_SLAVE 0x0002
	309
	310	/* serial subtype definitions */
	311	#define SERIAL_TYPE_NORMAL 1
	312
	313	#endif /* #ifdef _LINUX_TTY_DRIVER_H */