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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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 *
Alan Cox99f1fe12008-10-13 10:42:00 +010010 * struct tty_struct * (*lookup)(struct tty_driver *self, int idx)
11 *
12 * Return the tty device corresponding to idx, NULL if there is not
13 * one currently in use and an ERR_PTR value on error. Called under
14 * tty_mutex (for now!)
15 *
16 * Optional method. Default behaviour is to use the ttys array
17 *
Alan Cox8b0a88d2008-10-13 10:42:19 +010018 * int (*install)(struct tty_driver *self, struct tty_struct *tty)
19 *
20 * Install a new tty into the tty driver internal tables. Used in
21 * conjunction with lookup and remove methods.
22 *
23 * Optional method. Default behaviour is to use the ttys array
24 *
25 * void (*remove)(struct tty_driver *self, struct tty_struct *tty)
26 *
27 * Remove a closed tty from the tty driver internal tables. Used in
28 * conjunction with lookup and remove methods.
29 *
30 * Optional method. Default behaviour is to use the ttys array
31 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 * int (*open)(struct tty_struct * tty, struct file * filp);
33 *
34 * This routine is called when a particular tty device is opened.
35 * This routine is mandatory; if this routine is not filled in,
36 * the attempted open will fail with ENODEV.
Alan Coxf34d7a52008-04-30 00:54:13 -070037 *
Peter Hurleyed617e42014-06-16 09:16:58 -040038 * Required method. Called with tty lock held.
39 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 * void (*close)(struct tty_struct * tty, struct file * filp);
41 *
42 * This routine is called when a particular tty device is closed.
Peter Hurley7be88b42013-01-30 12:43:51 -050043 * Note: called even if the corresponding open() failed.
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 *
Peter Hurleyed617e42014-06-16 09:16:58 -040045 * Required method. Called with tty lock held.
Alan Coxf34d7a52008-04-30 00:54:13 -070046 *
Alan Coxfeebed62008-10-13 10:41:30 +010047 * void (*shutdown)(struct tty_struct * tty);
48 *
Alan Cox36b3c072012-07-17 17:06:57 +010049 * This routine is called under the tty lock when a particular tty device
50 * is closed for the last time. It executes before the tty resources
51 * are freed so may execute while another function holds a tty kref.
Dave Youngf278a2f2009-09-27 16:00:42 +000052 *
53 * void (*cleanup)(struct tty_struct * tty);
54 *
55 * This routine is called asynchronously when a particular tty device
56 * is closed for the last time freeing up the resources. This is
57 * actually the second part of shutdown for routines that might sleep.
58 *
Alan Coxfeebed62008-10-13 10:41:30 +010059 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 * int (*write)(struct tty_struct * tty,
61 * const unsigned char *buf, int count);
62 *
63 * This routine is called by the kernel to write a series of
64 * characters to the tty device. The characters may come from
65 * user space or kernel space. This routine will return the
Alan Cox36c73432008-06-23 12:06:52 +010066 * number of characters actually accepted for writing.
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 *
Alan Coxf34d7a52008-04-30 00:54:13 -070068 * Optional: Required for writable devices.
69 *
70 * int (*put_char)(struct tty_struct *tty, unsigned char ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 *
72 * This routine is called by the kernel to write a single
73 * character to the tty device. If the kernel uses this routine,
74 * it must call the flush_chars() routine (if defined) when it is
75 * done stuffing characters into the driver. If there is no room
76 * in the queue, the character is ignored.
77 *
Alan Coxf34d7a52008-04-30 00:54:13 -070078 * Optional: Kernel will use the write method if not provided.
79 *
80 * Note: Do not call this function directly, call tty_put_char
81 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 * void (*flush_chars)(struct tty_struct *tty);
83 *
84 * This routine is called by the kernel after it has written a
85 * series of characters to the tty device using put_char().
Alan Coxf34d7a52008-04-30 00:54:13 -070086 *
87 * Optional:
88 *
89 * Note: Do not call this function directly, call tty_driver_flush_chars
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 *
91 * int (*write_room)(struct tty_struct *tty);
92 *
93 * This routine returns the numbers of characters the tty driver
94 * will accept for queuing to be written. This number is subject
95 * to change as output buffers get emptied, or if the output flow
96 * control is acted.
Alan Coxf34d7a52008-04-30 00:54:13 -070097 *
98 * Required if write method is provided else not needed.
99 *
100 * Note: Do not call this function directly, call tty_write_room
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 *
Alan Cox6caa76b2011-02-14 16:27:22 +0000102 * int (*ioctl)(struct tty_struct *tty, unsigned int cmd, unsigned long arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 *
104 * This routine allows the tty driver to implement
Timur Tabi6ce5b1c2010-12-13 14:08:53 -0600105 * device-specific ioctls. If the ioctl number passed in cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 * is not recognized by the driver, it should return ENOIOCTLCMD.
Paul Fulghume10cc1d2007-05-10 22:22:50 -0700107 *
Alan Coxf34d7a52008-04-30 00:54:13 -0700108 * Optional
109 *
Alan Cox6caa76b2011-02-14 16:27:22 +0000110 * long (*compat_ioctl)(struct tty_struct *tty,,
Paul Fulghume10cc1d2007-05-10 22:22:50 -0700111 * unsigned int cmd, unsigned long arg);
112 *
113 * implement ioctl processing for 32 bit process on 64 bit system
Alan Coxf34d7a52008-04-30 00:54:13 -0700114 *
115 * Optional
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 *
Alan Coxedc6afc2006-12-08 02:38:44 -0800117 * void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 *
119 * This routine allows the tty driver to be notified when
Alan Coxf34d7a52008-04-30 00:54:13 -0700120 * device's termios settings have changed.
121 *
122 * Optional: Called under the termios lock
123 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 *
125 * void (*set_ldisc)(struct tty_struct *tty);
126 *
127 * This routine allows the tty driver to be notified when the
128 * device's termios settings have changed.
Alan Coxf34d7a52008-04-30 00:54:13 -0700129 *
130 * Optional: Called under BKL (currently)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 *
132 * void (*throttle)(struct tty_struct * tty);
133 *
134 * This routine notifies the tty driver that input buffers for
135 * the line discipline are close to full, and it should somehow
136 * signal that no more characters should be sent to the tty.
Alan Cox39c2e602008-04-30 00:54:18 -0700137 *
Alan Cox38db8972009-06-11 12:44:17 +0100138 * Optional: Always invoke via tty_throttle(), called under the
139 * termios lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 *
141 * void (*unthrottle)(struct tty_struct * tty);
142 *
143 * This routine notifies the tty drivers that it should signals
144 * that characters can now be sent to the tty without fear of
145 * overrunning the input buffers of the line disciplines.
146 *
Alan Cox38db8972009-06-11 12:44:17 +0100147 * Optional: Always invoke via tty_unthrottle(), called under the
148 * termios lock.
Alan Cox39c2e602008-04-30 00:54:18 -0700149 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 * void (*stop)(struct tty_struct *tty);
151 *
152 * This routine notifies the tty driver that it should stop
153 * outputting characters to the tty device.
Alan Coxf34d7a52008-04-30 00:54:13 -0700154 *
Peter Hurleyf9e053d2014-09-10 15:06:31 -0400155 * Called with ->flow_lock held. Serialized with start() method.
156 *
Alan Coxf34d7a52008-04-30 00:54:13 -0700157 * Optional:
158 *
159 * Note: Call stop_tty not this method.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 *
161 * void (*start)(struct tty_struct *tty);
162 *
163 * This routine notifies the tty driver that it resume sending
164 * characters to the tty device.
Alan Coxf34d7a52008-04-30 00:54:13 -0700165 *
Peter Hurleyf9e053d2014-09-10 15:06:31 -0400166 * Called with ->flow_lock held. Serialized with stop() method.
167 *
Alan Coxf34d7a52008-04-30 00:54:13 -0700168 * Optional:
169 *
170 * Note: Call start_tty not this method.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 *
172 * void (*hangup)(struct tty_struct *tty);
173 *
Timur Tabi6ce5b1c2010-12-13 14:08:53 -0600174 * This routine notifies the tty driver that it should hang up the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 * tty device.
176 *
Alan Cox36c73432008-06-23 12:06:52 +0100177 * Optional:
Alan Coxf34d7a52008-04-30 00:54:13 -0700178 *
Peter Hurleyed617e42014-06-16 09:16:58 -0400179 * Called with tty lock held.
180 *
Timur Tabi6ce5b1c2010-12-13 14:08:53 -0600181 * int (*break_ctl)(struct tty_struct *tty, int state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 *
183 * This optional routine requests the tty driver to turn on or
184 * off BREAK status on the RS-232 port. If state is -1,
185 * then the BREAK status should be turned on; if state is 0, then
186 * BREAK should be turned off.
187 *
188 * If this routine is implemented, the high-level tty driver will
189 * handle the following ioctls: TCSBRK, TCSBRKP, TIOCSBRK,
Alan Coxf34d7a52008-04-30 00:54:13 -0700190 * TIOCCBRK.
191 *
Alan Cox9e989662008-07-22 11:18:03 +0100192 * If the driver sets TTY_DRIVER_HARDWARE_BREAK then the interface
193 * will also be called with actual times and the hardware is expected
194 * to do the delay work itself. 0 and -1 are still used for on/off.
195 *
Alan Coxf34d7a52008-04-30 00:54:13 -0700196 * Optional: Required for TCSBRK/BRKP/etc handling.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 *
198 * void (*wait_until_sent)(struct tty_struct *tty, int timeout);
199 *
200 * This routine waits until the device has written out all of the
201 * characters in its transmitter FIFO.
202 *
Alan Coxf34d7a52008-04-30 00:54:13 -0700203 * Optional: If not provided the device is assumed to have no FIFO
204 *
205 * Note: Usually correct to call tty_wait_until_sent
206 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 * void (*send_xchar)(struct tty_struct *tty, char ch);
208 *
209 * This routine is used to send a high-priority XON/XOFF
210 * character to the device.
Alan Coxf34d7a52008-04-30 00:54:13 -0700211 *
212 * Optional: If not provided then the write method is called under
213 * the atomic write lock to keep it serialized with the ldisc.
Alan Cox8c9a9dd2008-08-15 10:39:38 +0100214 *
Alan Coxfc6f6232009-01-02 13:43:17 +0000215 * int (*resize)(struct tty_struct *tty, struct winsize *ws)
Alan Cox8c9a9dd2008-08-15 10:39:38 +0100216 *
217 * Called when a termios request is issued which changes the
218 * requested terminal geometry.
219 *
220 * Optional: the default action is to update the termios structure
221 * without error. This is usually the correct behaviour. Drivers should
222 * not force errors here if they are not resizable objects (eg a serial
223 * line). See tty_do_resize() if you need to wrap the standard method
224 * in your own logic - the usual case.
Alan Cox1d65b4a2008-10-13 10:38:18 +0100225 *
226 * void (*set_termiox)(struct tty_struct *tty, struct termiox *new);
227 *
228 * Called when the device receives a termiox based ioctl. Passes down
229 * the requested data from user space. This method will not be invoked
230 * unless the tty also has a valid tty->termiox pointer.
231 *
232 * Optional: Called under the termios lock
Alan Coxd281da72010-09-16 18:21:24 +0100233 *
234 * int (*get_icount)(struct tty_struct *tty, struct serial_icounter *icount);
235 *
236 * Called when the device receives a TIOCGICOUNT ioctl. Passed a kernel
237 * structure to complete. This method is optional and will only be called
238 * if provided (otherwise EINVAL will be returned).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 */
240
Jiri Slaby1a54a762012-03-05 14:51:50 +0100241#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242#include <linux/fs.h>
243#include <linux/list.h>
244#include <linux/cdev.h>
Jiri Slaby3dfbd042010-11-04 16:20:23 +0100245#include <linux/termios.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247struct tty_struct;
Jason Wesself2d937f2008-04-17 20:05:37 +0200248struct tty_driver;
Alan Coxd281da72010-09-16 18:21:24 +0100249struct serial_icounter_struct;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251struct tty_operations {
Sukadev Bhattiprolu15f1a632008-10-13 10:42:59 +0100252 struct tty_struct * (*lookup)(struct tty_driver *driver,
253 struct inode *inode, int idx);
Alan Cox8b0a88d2008-10-13 10:42:19 +0100254 int (*install)(struct tty_driver *driver, struct tty_struct *tty);
255 void (*remove)(struct tty_driver *driver, struct tty_struct *tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 int (*open)(struct tty_struct * tty, struct file * filp);
257 void (*close)(struct tty_struct * tty, struct file * filp);
Alan Coxfeebed62008-10-13 10:41:30 +0100258 void (*shutdown)(struct tty_struct *tty);
Dave Youngf278a2f2009-09-27 16:00:42 +0000259 void (*cleanup)(struct tty_struct *tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 int (*write)(struct tty_struct * tty,
261 const unsigned char *buf, int count);
Alan Coxf34d7a52008-04-30 00:54:13 -0700262 int (*put_char)(struct tty_struct *tty, unsigned char ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 void (*flush_chars)(struct tty_struct *tty);
264 int (*write_room)(struct tty_struct *tty);
265 int (*chars_in_buffer)(struct tty_struct *tty);
Alan Cox6caa76b2011-02-14 16:27:22 +0000266 int (*ioctl)(struct tty_struct *tty,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 unsigned int cmd, unsigned long arg);
Alan Cox6caa76b2011-02-14 16:27:22 +0000268 long (*compat_ioctl)(struct tty_struct *tty,
Paul Fulghume10cc1d2007-05-10 22:22:50 -0700269 unsigned int cmd, unsigned long arg);
Alan Coxedc6afc2006-12-08 02:38:44 -0800270 void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 void (*throttle)(struct tty_struct * tty);
272 void (*unthrottle)(struct tty_struct * tty);
273 void (*stop)(struct tty_struct *tty);
274 void (*start)(struct tty_struct *tty);
275 void (*hangup)(struct tty_struct *tty);
Alan Cox9e989662008-07-22 11:18:03 +0100276 int (*break_ctl)(struct tty_struct *tty, int state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 void (*flush_buffer)(struct tty_struct *tty);
278 void (*set_ldisc)(struct tty_struct *tty);
279 void (*wait_until_sent)(struct tty_struct *tty, int timeout);
280 void (*send_xchar)(struct tty_struct *tty, char ch);
Alan Cox60b33c12011-02-14 16:26:14 +0000281 int (*tiocmget)(struct tty_struct *tty);
Alan Cox20b9d172011-02-14 16:26:50 +0000282 int (*tiocmset)(struct tty_struct *tty,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 unsigned int set, unsigned int clear);
Alan Coxfc6f6232009-01-02 13:43:17 +0000284 int (*resize)(struct tty_struct *tty, struct winsize *ws);
Alan Cox1d65b4a2008-10-13 10:38:18 +0100285 int (*set_termiox)(struct tty_struct *tty, struct termiox *tnew);
Alan Coxd281da72010-09-16 18:21:24 +0100286 int (*get_icount)(struct tty_struct *tty,
287 struct serial_icounter_struct *icount);
Jason Wesself2d937f2008-04-17 20:05:37 +0200288#ifdef CONFIG_CONSOLE_POLL
289 int (*poll_init)(struct tty_driver *driver, int line, char *options);
290 int (*poll_get_char)(struct tty_driver *driver, int line);
291 void (*poll_put_char)(struct tty_driver *driver, int line, char ch);
292#endif
Alexey Dobriyanae149b62009-03-31 15:19:15 -0700293 const struct file_operations *proc_fops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294};
295
296struct tty_driver {
297 int magic; /* magic number for this structure */
Alan Cox7d7b93c2008-10-13 10:42:09 +0100298 struct kref kref; /* Reference management */
Jiri Slaby7e73eca2012-08-08 22:26:44 +0200299 struct cdev *cdevs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 struct module *owner;
301 const char *driver_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 const char *name;
303 int name_base; /* offset of printed name */
304 int major; /* major device number */
305 int minor_start; /* start of minor device number */
Jiri Slaby7f0bc6a2012-08-07 21:47:42 +0200306 unsigned int num; /* number of devices allocated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 short type; /* type of tty driver */
308 short subtype; /* subtype of tty driver */
Alan Coxedc6afc2006-12-08 02:38:44 -0800309 struct ktermios init_termios; /* Initial termios */
Jiri Slaby7f0bc6a2012-08-07 21:47:42 +0200310 unsigned long flags; /* tty driver flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 struct proc_dir_entry *proc_entry; /* /proc fs entry */
312 struct tty_driver *other; /* only used for the PTY driver */
313
314 /*
315 * Pointer to the tty data structures
316 */
317 struct tty_struct **ttys;
Jiri Slaby04831dc2012-06-04 13:35:36 +0200318 struct tty_port **ports;
Alan Coxedc6afc2006-12-08 02:38:44 -0800319 struct ktermios **termios;
Alan Coxf34d7a52008-04-30 00:54:13 -0700320 void *driver_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
Alan Coxf34d7a52008-04-30 00:54:13 -0700322 /*
323 * Driver methods
324 */
325
326 const struct tty_operations *ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 struct list_head tty_drivers;
328};
329
330extern struct list_head tty_drivers;
331
Jiri Slaby7f0bc6a2012-08-07 21:47:42 +0200332extern struct tty_driver *__tty_alloc_driver(unsigned int lines,
333 struct module *owner, unsigned long flags);
Alan Cox7d7b93c2008-10-13 10:42:09 +0100334extern void put_tty_driver(struct tty_driver *driver);
335extern void tty_set_operations(struct tty_driver *driver,
Jeff Dikeb68e31d2006-10-02 02:17:18 -0700336 const struct tty_operations *op);
Jason Wesself2d937f2008-04-17 20:05:37 +0200337extern struct tty_driver *tty_find_polling_driver(char *name, int *line);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
Alan Cox7d7b93c2008-10-13 10:42:09 +0100339extern void tty_driver_kref_put(struct tty_driver *driver);
Adrian Bunkf786ddd2009-04-07 16:48:07 +0100340
Jiri Slaby7f0bc6a2012-08-07 21:47:42 +0200341/* Use TTY_DRIVER_* flags below */
342#define tty_alloc_driver(lines, flags) \
343 __tty_alloc_driver(lines, THIS_MODULE, flags)
344
345/*
346 * DEPRECATED Do not use this in new code, use tty_alloc_driver instead.
347 * (And change the return value checks.)
348 */
349static inline struct tty_driver *alloc_tty_driver(unsigned int lines)
350{
351 struct tty_driver *ret = tty_alloc_driver(lines, 0);
352 if (IS_ERR(ret))
353 return NULL;
354 return ret;
355}
Jiri Slaby1a54a762012-03-05 14:51:50 +0100356
Adrian Bunkf786ddd2009-04-07 16:48:07 +0100357static inline struct tty_driver *tty_driver_kref_get(struct tty_driver *d)
Alan Cox7d7b93c2008-10-13 10:42:09 +0100358{
359 kref_get(&d->kref);
360 return d;
361}
362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363/* tty driver magic number */
364#define TTY_DRIVER_MAGIC 0x5402
365
366/*
367 * tty driver flags
368 *
369 * TTY_DRIVER_RESET_TERMIOS --- requests the tty layer to reset the
370 * termios setting when the last process has closed the device.
371 * Used for PTY's, in particular.
372 *
373 * TTY_DRIVER_REAL_RAW --- if set, indicates that the driver will
374 * guarantee never not to set any special character handling
375 * flags if ((IGNBRK || (!BRKINT && !PARMRK)) && (IGNPAR ||
376 * !INPCK)). That is, if there is no reason for the driver to
377 * send notifications of parity and break characters up to the
378 * line driver, it won't do so. This allows the line driver to
379 * optimize for this case if this flag is set. (Note that there
380 * is also a promise, if the above case is true, not to signal
381 * overruns, either.)
382 *
Greg Kroah-Hartman331b8312005-06-20 21:15:16 -0700383 * TTY_DRIVER_DYNAMIC_DEV --- if set, the individual tty devices need
Timur Tabi6ce5b1c2010-12-13 14:08:53 -0600384 * to be registered with a call to tty_register_device() when the
Greg Kroah-Hartman331b8312005-06-20 21:15:16 -0700385 * device is found in the system and unregistered with a call to
386 * tty_unregister_device() so the devices will be show up
387 * properly in sysfs. If not set, driver->num entries will be
388 * created by the tty core in sysfs when tty_register_driver() is
389 * called. This is to be used by drivers that have tty devices
390 * that can appear and disappear while the main tty driver is
391 * registered with the tty core.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 *
393 * TTY_DRIVER_DEVPTS_MEM -- don't use the standard arrays, instead
394 * use dynamic memory keyed through the devpts filesystem. This
395 * is only applicable to the pty driver.
Alan Cox9e989662008-07-22 11:18:03 +0100396 *
397 * TTY_DRIVER_HARDWARE_BREAK -- hardware handles break signals. Pass
398 * the requested timeout to the caller instead of using a simple
399 * on/off interface.
400 *
Jiri Slaby21aca2f2012-08-08 22:26:41 +0200401 * TTY_DRIVER_DYNAMIC_ALLOC -- do not allocate structures which are
402 * needed per line for this driver as it would waste memory.
403 * The driver will take care.
Jiri Slaby0019b402012-08-08 22:26:43 +0200404 *
405 * TTY_DRIVER_UNNUMBERED_NODE -- do not create numbered /dev nodes. In
406 * other words create /dev/ttyprintk and not /dev/ttyprintk0.
407 * Applicable only when a driver for a single tty device is
408 * being allocated.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 */
410#define TTY_DRIVER_INSTALLED 0x0001
411#define TTY_DRIVER_RESET_TERMIOS 0x0002
412#define TTY_DRIVER_REAL_RAW 0x0004
Greg Kroah-Hartman331b8312005-06-20 21:15:16 -0700413#define TTY_DRIVER_DYNAMIC_DEV 0x0008
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414#define TTY_DRIVER_DEVPTS_MEM 0x0010
Alan Cox9e989662008-07-22 11:18:03 +0100415#define TTY_DRIVER_HARDWARE_BREAK 0x0020
Jiri Slaby21aca2f2012-08-08 22:26:41 +0200416#define TTY_DRIVER_DYNAMIC_ALLOC 0x0040
Jiri Slaby0019b402012-08-08 22:26:43 +0200417#define TTY_DRIVER_UNNUMBERED_NODE 0x0080
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
419/* tty driver types */
420#define TTY_DRIVER_TYPE_SYSTEM 0x0001
421#define TTY_DRIVER_TYPE_CONSOLE 0x0002
422#define TTY_DRIVER_TYPE_SERIAL 0x0003
423#define TTY_DRIVER_TYPE_PTY 0x0004
424#define TTY_DRIVER_TYPE_SCC 0x0005 /* scc driver */
425#define TTY_DRIVER_TYPE_SYSCONS 0x0006
426
427/* system subtypes (magic, used by tty_io.c) */
428#define SYSTEM_TYPE_TTY 0x0001
429#define SYSTEM_TYPE_CONSOLE 0x0002
430#define SYSTEM_TYPE_SYSCONS 0x0003
431#define SYSTEM_TYPE_SYSPTMX 0x0004
432
433/* pty subtypes (magic, used by tty_io.c) */
434#define PTY_TYPE_MASTER 0x0001
435#define PTY_TYPE_SLAVE 0x0002
436
437/* serial subtype definitions */
438#define SERIAL_TYPE_NORMAL 1
439
440#endif /* #ifdef _LINUX_TTY_DRIVER_H */