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Merge branch 'upstream/wm8974' into for-2.6.33
[linux-2.6-block.git] / include / linux / tty.h
CommitLineData
1da177e4
LT		 1#ifndef _LINUX_TTY_H
2#define _LINUX_TTY_H
3
4/*
5 * 'tty.h' defines some structures used by tty_io.c and some defines.
6 */
7
1da177e4 8#ifdef __KERNEL__
1da177e4
LT		 9#include <linux/fs.h>
10#include <linux/major.h>
11#include <linux/termios.h>
12#include <linux/workqueue.h>
13#include <linux/tty_driver.h>
14#include <linux/tty_ldisc.h>
70522e12 15#include <linux/mutex.h>
1da177e4
LT		 16
17#include <asm/system.h>
18
19
20/*
21 * (Note: the *_driver.minor_start values 1, 64, 128, 192 are
22 * hardcoded at present.)
23 */
1da177e4
LT		 24#define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
25#define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
78ed73e8 26#define NR_LDISCS 20
4564f9e5
TS		 27
28/* line disciplines */
29#define N_TTY 0
30#define N_SLIP 1
31#define N_MOUSE 2
32#define N_PPP 3
33#define N_STRIP 4
34#define N_AX25 5
35#define N_X25 6 /* X.25 async */
36#define N_6PACK 7
37#define N_MASC 8 /* Reserved for Mobitex module <kaz@cafe.net> */
38#define N_R3964 9 /* Reserved for Simatic R3964 module */
44d1b980 39#define N_PROFIBUS_FDL 10 /* Reserved for Profibus */
4564f9e5
TS		 40#define N_IRDA 11 /* Linux IrDa - http://irda.sourceforge.net/ */
41#define N_SMSBLOCK 12 /* SMS block mode - for talking to GSM data */
42 /* cards about SMS messages */
43#define N_HDLC 13 /* synchronous HDLC */
44#define N_SYNC_PPP 14 /* synchronous PPP */
45#define N_HCI 15 /* Bluetooth HCI UART */
46#define N_GIGASET_M101 16 /* Siemens Gigaset M101 serial DECT adapter */
cd05acfe 47#define N_SLCAN 17 /* Serial / USB serial CAN Adaptors */
348eb12e 48#define N_PPS 18 /* Pulse per Second */
1da177e4 49
b7b8f9bf 50#define N_V253 19 /* Codec control over voice modem */
78ed73e8 51
1da177e4
LT		 52/*
53 * This character is the same as _POSIX_VDISABLE: it cannot be used as
54 * a c_cc[] character, but indicates that a particular special character
55 * isn't in use (eg VINTR has no character etc)
56 */
57#define __DISABLED_CHAR '\0'
58
33f0f88f
AC		 59struct tty_buffer {
60 struct tty_buffer *next;
61 char *char_buf_ptr;
62 unsigned char *flag_buf_ptr;
63 int used;
64 int size;
8977d929
PF		 65 int commit;
66 int read;
33f0f88f
AC		 67 /* Data points here */
68 unsigned long data[0];
69};
70
71struct tty_bufhead {
52bad64d 72 struct delayed_work work;
808249ce 73 spinlock_t lock;
33f0f88f
AC		 74 struct tty_buffer *head; /* Queue head */
75 struct tty_buffer *tail; /* Active buffer */
76 struct tty_buffer *free; /* Free queue head */
7a4d29f4
AC		 77 int memory_used; /* Buffer space used excluding
78 free queue */
1da177e4 79};
1da177e4
LT		 80/*
81 * When a break, frame error, or parity error happens, these codes are
82 * stuffed into the flags buffer.
83 */
84#define TTY_NORMAL 0
85#define TTY_BREAK 1
86#define TTY_FRAME 2
87#define TTY_PARITY 3
88#define TTY_OVERRUN 4
89
90#define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
91#define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
92#define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
93#define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
94#define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
95#define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
96#define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
97#define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
98#define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
99#define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
100#define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
101#define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
102#define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
103#define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
104#define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
105#define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
106#define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
107
7a4d29f4
AC		 108#define _I_FLAG(tty, f) ((tty)->termios->c_iflag & (f))
109#define _O_FLAG(tty, f) ((tty)->termios->c_oflag & (f))
110#define _C_FLAG(tty, f) ((tty)->termios->c_cflag & (f))
111#define _L_FLAG(tty, f) ((tty)->termios->c_lflag & (f))
112
113#define I_IGNBRK(tty) _I_FLAG((tty), IGNBRK)
114#define I_BRKINT(tty) _I_FLAG((tty), BRKINT)
115#define I_IGNPAR(tty) _I_FLAG((tty), IGNPAR)
116#define I_PARMRK(tty) _I_FLAG((tty), PARMRK)
117#define I_INPCK(tty) _I_FLAG((tty), INPCK)
118#define I_ISTRIP(tty) _I_FLAG((tty), ISTRIP)
119#define I_INLCR(tty) _I_FLAG((tty), INLCR)
120#define I_IGNCR(tty) _I_FLAG((tty), IGNCR)
121#define I_ICRNL(tty) _I_FLAG((tty), ICRNL)
122#define I_IUCLC(tty) _I_FLAG((tty), IUCLC)
123#define I_IXON(tty) _I_FLAG((tty), IXON)
124#define I_IXANY(tty) _I_FLAG((tty), IXANY)
125#define I_IXOFF(tty) _I_FLAG((tty), IXOFF)
126#define I_IMAXBEL(tty) _I_FLAG((tty), IMAXBEL)
127#define I_IUTF8(tty) _I_FLAG((tty), IUTF8)
128
129#define O_OPOST(tty) _O_FLAG((tty), OPOST)
130#define O_OLCUC(tty) _O_FLAG((tty), OLCUC)
131#define O_ONLCR(tty) _O_FLAG((tty), ONLCR)
132#define O_OCRNL(tty) _O_FLAG((tty), OCRNL)
133#define O_ONOCR(tty) _O_FLAG((tty), ONOCR)
134#define O_ONLRET(tty) _O_FLAG((tty), ONLRET)
135#define O_OFILL(tty) _O_FLAG((tty), OFILL)
136#define O_OFDEL(tty) _O_FLAG((tty), OFDEL)
137#define O_NLDLY(tty) _O_FLAG((tty), NLDLY)
138#define O_CRDLY(tty) _O_FLAG((tty), CRDLY)
139#define O_TABDLY(tty) _O_FLAG((tty), TABDLY)
140#define O_BSDLY(tty) _O_FLAG((tty), BSDLY)
141#define O_VTDLY(tty) _O_FLAG((tty), VTDLY)
142#define O_FFDLY(tty) _O_FLAG((tty), FFDLY)
143
144#define C_BAUD(tty) _C_FLAG((tty), CBAUD)
145#define C_CSIZE(tty) _C_FLAG((tty), CSIZE)
146#define C_CSTOPB(tty) _C_FLAG((tty), CSTOPB)
147#define C_CREAD(tty) _C_FLAG((tty), CREAD)
148#define C_PARENB(tty) _C_FLAG((tty), PARENB)
149#define C_PARODD(tty) _C_FLAG((tty), PARODD)
150#define C_HUPCL(tty) _C_FLAG((tty), HUPCL)
151#define C_CLOCAL(tty) _C_FLAG((tty), CLOCAL)
152#define C_CIBAUD(tty) _C_FLAG((tty), CIBAUD)
153#define C_CRTSCTS(tty) _C_FLAG((tty), CRTSCTS)
154
155#define L_ISIG(tty) _L_FLAG((tty), ISIG)
156#define L_ICANON(tty) _L_FLAG((tty), ICANON)
157#define L_XCASE(tty) _L_FLAG((tty), XCASE)
158#define L_ECHO(tty) _L_FLAG((tty), ECHO)
159#define L_ECHOE(tty) _L_FLAG((tty), ECHOE)
160#define L_ECHOK(tty) _L_FLAG((tty), ECHOK)
161#define L_ECHONL(tty) _L_FLAG((tty), ECHONL)
162#define L_NOFLSH(tty) _L_FLAG((tty), NOFLSH)
163#define L_TOSTOP(tty) _L_FLAG((tty), TOSTOP)
164#define L_ECHOCTL(tty) _L_FLAG((tty), ECHOCTL)
165#define L_ECHOPRT(tty) _L_FLAG((tty), ECHOPRT)
166#define L_ECHOKE(tty) _L_FLAG((tty), ECHOKE)
167#define L_FLUSHO(tty) _L_FLAG((tty), FLUSHO)
168#define L_PENDIN(tty) _L_FLAG((tty), PENDIN)
169#define L_IEXTEN(tty) _L_FLAG((tty), IEXTEN)
1da177e4
LT		 170
171struct device;
522ed776 172struct signal_struct;
6f67048c
AC		 173
174/*
175 * Port level information. Each device keeps its own port level information
176 * so provide a common structure for those ports wanting to use common support
177 * routines.
178 *
179 * The tty port has a different lifetime to the tty so must be kept apart.
180 * In addition be careful as tty -> port mappings are valid for the life
181 * of the tty object but in many cases port -> tty mappings are valid only
182 * until a hangup so don't use the wrong path.
183 */
7a4d29f4 184
31f35939
AC		 185struct tty_port;
186
187struct tty_port_operations {
188 /* Return 1 if the carrier is raised */
189 int (*carrier_raised)(struct tty_port *port);
fcc8ac18 190 void (*dtr_rts)(struct tty_port *port, int raise);
31f35939
AC		 191};
192
6f67048c
AC		 193struct tty_port {
194 struct tty_struct *tty; /* Back pointer */
31f35939 195 const struct tty_port_operations *ops; /* Port operations */
4a90f09b 196 spinlock_t lock; /* Lock protecting tty field */
6f67048c
AC		 197 int blocked_open; /* Waiting to open */
198 int count; /* Usage count */
199 wait_queue_head_t open_wait; /* Open waiters */
200 wait_queue_head_t close_wait; /* Close waiters */
201 unsigned long flags; /* TTY flags ASY_*/
202 struct mutex mutex; /* Locking */
203 unsigned char *xmit_buf; /* Optional buffer */
44b7d1b3
AC		 204 int close_delay; /* Close port delay */
205 int closing_wait; /* Delay for output */
1ec739be
AC		 206 int drain_delay; /* Set to zero if no pure time
207 based drain is needed else
208 set to size of fifo */
6f67048c
AC		 209};
210
1da177e4
LT		 211/*
212 * Where all of the state associated with a tty is kept while the tty
213 * is open. Since the termios state should be kept even if the tty
214 * has been closed --- for things like the baud rate, etc --- it is
215 * not stored here, but rather a pointer to the real state is stored
216 * here. Possible the winsize structure should have the same
217 * treatment, but (1) the default 80x24 is usually right and (2) it's
218 * most often used by a windowing system, which will set the correct
219 * size each time the window is created or resized anyway.
220 * - TYT, 9/14/92
221 */
f34d7a5b
AC		 222
223struct tty_operations;
224
1da177e4
LT		 225struct tty_struct {
226 int magic;
9c9f4ded 227 struct kref kref;
1da177e4 228 struct tty_driver *driver;
f34d7a5b 229 const struct tty_operations *ops;
1da177e4 230 int index;
c65c9bc3
AC		 231
232 /* Protects ldisc changes: Lock tty not pty */
233 struct mutex ldisc_mutex;
234 struct tty_ldisc *ldisc;
235
5785c95b 236 struct mutex termios_mutex;
04f378b1 237 spinlock_t ctrl_lock;
47f86834 238 /* Termios values are protected by the termios mutex */
edc6afc5 239 struct ktermios *termios, *termios_locked;
1d65b4a0 240 struct termiox *termiox; /* May be NULL for unsupported */
1da177e4 241 char name[64];
47f86834 242 struct pid *pgrp; /* Protected by ctrl lock */
ab521dc0 243 struct pid *session;
1da177e4
LT		 244 unsigned long flags;
245 int count;
47f86834 246 struct winsize winsize; /* termios mutex */
1da177e4
LT		 247 unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
248 unsigned char low_latency:1, warned:1;
47f86834 249 unsigned char ctrl_status; /* ctrl_lock */
33f0f88f 250 unsigned int receive_room; /* Bytes free for queue */
1da177e4
LT		 251
252 struct tty_struct *link;
253 struct fasync_struct *fasync;
47f86834 254 struct tty_bufhead buf; /* Locked internally */
1da177e4
LT		 255 int alt_speed; /* For magic substitution of 38400 bps */
256 wait_queue_head_t write_wait;
257 wait_queue_head_t read_wait;
258 struct work_struct hangup_work;
259 void *disc_data;
260 void *driver_data;
261 struct list_head tty_files;
262
263#define N_TTY_BUF_SIZE 4096
6f67048c 264
1da177e4
LT		 265 /*
266 * The following is data for the N_TTY line discipline. For
267 * historical reasons, this is included in the tty structure.
47f86834 268 * Mostly locked by the BKL.
1da177e4
LT		 269 */
270 unsigned int column;
271 unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
272 unsigned char closing:1;
a88a69c9 273 unsigned char echo_overrun:1;
1da177e4
LT		 274 unsigned short minimum_to_wake;
275 unsigned long overrun_time;
276 int num_overrun;
277 unsigned long process_char_map[256/(8*sizeof(unsigned long))];
278 char *read_buf;
279 int read_head;
280 int read_tail;
281 int read_cnt;
282 unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
a88a69c9
JP		 283 unsigned char *echo_buf;
284 unsigned int echo_pos;
285 unsigned int echo_cnt;
1da177e4
LT		 286 int canon_data;
287 unsigned long canon_head;
288 unsigned int canon_column;
70522e12
IM		 289 struct mutex atomic_read_lock;
290 struct mutex atomic_write_lock;
a88a69c9
JP		 291 struct mutex output_lock;
292 struct mutex echo_lock;
1da177e4
LT		 293 unsigned char *write_buf;
294 int write_cnt;
295 spinlock_t read_lock;
296 /* If the tty has a pending do_SAK, queue it here - akpm */
297 struct work_struct SAK_work;
6f67048c 298 struct tty_port *port;
1da177e4
LT		 299};
300
301/* tty magic number */
302#define TTY_MAGIC 0x5401
303
304/*
305 * These bits are used in the flags field of the tty structure.
7a4d29f4 306 *
1da177e4
LT		 307 * So that interrupts won't be able to mess up the queues,
308 * copy_to_cooked must be atomic with respect to itself, as must
309 * tty->write. Thus, you must use the inline functions set_bit() and
310 * clear_bit() to make things atomic.
311 */
312#define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */
7a4d29f4 313#define TTY_IO_ERROR 1 /* Cause an I/O error (may be no ldisc too) */
1da177e4
LT		 314#define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */
315#define TTY_EXCLUSIVE 3 /* Exclusive open mode */
316#define TTY_DEBUG 4 /* Debugging */
317#define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */
318#define TTY_PUSH 6 /* n_tty private */
319#define TTY_CLOSING 7 /* ->close() in progress */
1da177e4 320#define TTY_LDISC 9 /* Line discipline attached */
c9b3976e 321#define TTY_LDISC_CHANGING 10 /* Line discipline changing */
c65c9bc3 322#define TTY_LDISC_OPEN 11 /* Line discipline is open */
1da177e4
LT		 323#define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */
324#define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */
325#define TTY_PTY_LOCK 16 /* pty private */
326#define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */
327#define TTY_HUPPED 18 /* Post driver->hangup() */
42fd552e
AC		 328#define TTY_FLUSHING 19 /* Flushing to ldisc in progress */
329#define TTY_FLUSHPENDING 20 /* Queued buffer flush pending */
1da177e4
LT		 330
331#define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
332
333extern void tty_write_flush(struct tty_struct *);
334
edc6afc5 335extern struct ktermios tty_std_termios;
1da177e4
LT		 336
337extern int kmsg_redirect;
338
339extern void console_init(void);
340extern int vcs_init(void);
341
d81ed103
AC		 342extern struct class *tty_class;
343
9c9f4ded
AC		 344/**
345 * tty_kref_get - get a tty reference
346 * @tty: tty device
347 *
348 * Return a new reference to a tty object. The caller must hold
349 * sufficient locks/counts to ensure that their existing reference cannot
350 * go away
351 */
352
14bfc987 353static inline struct tty_struct *tty_kref_get(struct tty_struct *tty)
9c9f4ded
AC		 354{
355 if (tty)
356 kref_get(&tty->kref);
357 return tty;
358}
359extern void tty_kref_put(struct tty_struct *tty);
360
1da177e4
LT		 361extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
362 const char *routine);
363extern char *tty_name(struct tty_struct *tty, char *buf);
7a4d29f4
AC		 364extern void tty_wait_until_sent(struct tty_struct *tty, long timeout);
365extern int tty_check_change(struct tty_struct *tty);
366extern void stop_tty(struct tty_struct *tty);
367extern void start_tty(struct tty_struct *tty);
1da177e4
LT		 368extern int tty_register_driver(struct tty_driver *driver);
369extern int tty_unregister_driver(struct tty_driver *driver);
01107d34
GKH		 370extern struct device *tty_register_device(struct tty_driver *driver,
371 unsigned index, struct device *dev);
1da177e4
LT		 372extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
373extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
374 int buflen);
375extern void tty_write_message(struct tty_struct *tty, char *msg);
f34d7a5b
AC		 376extern int tty_put_char(struct tty_struct *tty, unsigned char c);
377extern int tty_chars_in_buffer(struct tty_struct *tty);
378extern int tty_write_room(struct tty_struct *tty);
379extern void tty_driver_flush_buffer(struct tty_struct *tty);
39c2e60f
AC		 380extern void tty_throttle(struct tty_struct *tty);
381extern void tty_unthrottle(struct tty_struct *tty);
fc6f6238 382extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
feebed65
AC		 383extern void tty_shutdown(struct tty_struct *tty);
384extern void tty_free_termios(struct tty_struct *tty);
3e7cd6c4 385extern int is_current_pgrp_orphaned(void);
5d0fdf1e 386extern struct pid *tty_get_pgrp(struct tty_struct *tty);
1da177e4
LT		 387extern int is_ignored(int sig);
388extern int tty_signal(int sig, struct tty_struct *tty);
7a4d29f4
AC		 389extern void tty_hangup(struct tty_struct *tty);
390extern void tty_vhangup(struct tty_struct *tty);
2cb5998b 391extern void tty_vhangup_self(void);
1da177e4 392extern void tty_unhangup(struct file *filp);
7a4d29f4 393extern int tty_hung_up_p(struct file *filp);
1da177e4 394extern void do_SAK(struct tty_struct *tty);
8b6312f4 395extern void __do_SAK(struct tty_struct *tty);
1da177e4 396extern void disassociate_ctty(int priv);
98a27ba4 397extern void no_tty(void);
1da177e4 398extern void tty_flip_buffer_push(struct tty_struct *tty);
e0495736
AC		 399extern void tty_buffer_free_all(struct tty_struct *tty);
400extern void tty_buffer_flush(struct tty_struct *tty);
401extern void tty_buffer_init(struct tty_struct *tty);
edc6afc5
AC		 402extern speed_t tty_get_baud_rate(struct tty_struct *tty);
403extern speed_t tty_termios_baud_rate(struct ktermios *termios);
404extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
7a4d29f4
AC		 405extern void tty_termios_encode_baud_rate(struct ktermios *termios,
406 speed_t ibaud, speed_t obaud);
407extern void tty_encode_baud_rate(struct tty_struct *tty,
408 speed_t ibaud, speed_t obaud);
5f519d72 409extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old);
bf5e5834 410extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b);
1da177e4
LT		 411
412extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
413extern void tty_ldisc_deref(struct tty_ldisc *);
414extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *);
c65c9bc3 415extern void tty_ldisc_hangup(struct tty_struct *tty);
a352def2 416extern const struct file_operations tty_ldiscs_proc_fops;
1da177e4
LT		 417
418extern void tty_wakeup(struct tty_struct *tty);
419extern void tty_ldisc_flush(struct tty_struct *tty);
420
04f378b1 421extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
0fc00e24
AC		 422extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file,
423 unsigned int cmd, unsigned long arg);
424extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg);
24ec839c
PZ		 425extern dev_t tty_devnum(struct tty_struct *tty);
426extern void proc_clear_tty(struct task_struct *p);
24ec839c 427extern struct tty_struct *get_current_tty(void);
d81ed103 428extern void tty_default_fops(struct file_operations *fops);
bf970ee4
AC		 429extern struct tty_struct *alloc_tty_struct(void);
430extern void free_tty_struct(struct tty_struct *tty);
431extern void initialize_tty_struct(struct tty_struct *tty,
432 struct tty_driver *driver, int idx);
73ec06fc
AC		 433extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
434 int first_ok);
d81ed103 435extern void tty_release_dev(struct file *filp);
bf970ee4 436extern int tty_init_termios(struct tty_struct *tty);
24ec839c 437
e8b70e7d
AC		 438extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty);
439extern struct tty_struct *tty_pair_get_pty(struct tty_struct *tty);
440
70522e12 441extern struct mutex tty_mutex;
1da177e4 442
9c1729db
AC		 443extern void tty_write_unlock(struct tty_struct *tty);
444extern int tty_write_lock(struct tty_struct *tty, int ndelay);
445#define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock))
446
6f67048c
AC		 447extern void tty_port_init(struct tty_port *port);
448extern int tty_port_alloc_xmit_buf(struct tty_port *port);
449extern void tty_port_free_xmit_buf(struct tty_port *port);
4a90f09b
AC		 450extern struct tty_struct *tty_port_tty_get(struct tty_port *port);
451extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty);
31f35939 452extern int tty_port_carrier_raised(struct tty_port *port);
5d951fb4 453extern void tty_port_raise_dtr_rts(struct tty_port *port);
fcc8ac18 454extern void tty_port_lower_dtr_rts(struct tty_port *port);
3e61696b 455extern void tty_port_hangup(struct tty_port *port);
36c621d8
AC		 456extern int tty_port_block_til_ready(struct tty_port *port,
457 struct tty_struct *tty, struct file *filp);
a6614999
AC		 458extern int tty_port_close_start(struct tty_port *port,
459 struct tty_struct *tty, struct file *filp);
460extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty);
6f67048c 461
01e1abb2
AC		 462extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
463extern int tty_unregister_ldisc(int disc);
464extern int tty_set_ldisc(struct tty_struct *tty, int ldisc);
465extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty);
466extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty);
467extern void tty_ldisc_init(struct tty_struct *tty);
468extern void tty_ldisc_begin(void);
469/* This last one is just for the tty layer internals and shouldn't be used elsewhere */
470extern void tty_ldisc_enable(struct tty_struct *tty);
9c1729db
AC		 471
472
1da177e4 473/* n_tty.c */
a352def2 474extern struct tty_ldisc_ops tty_ldisc_N_TTY;
1da177e4 475
522ed776
MT		 476/* tty_audit.c */
477#ifdef CONFIG_AUDIT
478extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
479 size_t size);
480extern void tty_audit_exit(void);
481extern void tty_audit_fork(struct signal_struct *sig);
1e641743 482extern void tty_audit_tiocsti(struct tty_struct *tty, char ch);
522ed776 483extern void tty_audit_push(struct tty_struct *tty);
7a4d29f4
AC		 484extern void tty_audit_push_task(struct task_struct *tsk,
485 uid_t loginuid, u32 sessionid);
522ed776
MT		 486#else
487static inline void tty_audit_add_data(struct tty_struct *tty,
488 unsigned char *data, size_t size)
489{
490}
1e641743
AV		 491static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch)
492{
493}
522ed776
MT		 494static inline void tty_audit_exit(void)
495{
496}
497static inline void tty_audit_fork(struct signal_struct *sig)
498{
499}
500static inline void tty_audit_push(struct tty_struct *tty)
501{
502}
7a4d29f4
AC		 503static inline void tty_audit_push_task(struct task_struct *tsk,
504 uid_t loginuid, u32 sessionid)
522ed776
MT		 505{
506}
522ed776
MT		 507#endif
508
1da177e4 509/* tty_ioctl.c */
47afa7a5 510extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
1da177e4
LT		 511 unsigned int cmd, unsigned long arg);
512
513/* serial.c */
514
515extern void serial_console_init(void);
7a4d29f4 516
1da177e4
LT		 517/* pcxx.c */
518
519extern int pcxe_open(struct tty_struct *tty, struct file *filp);
520
521/* printk.c */
522
523extern void console_print(const char *);
524
525/* vt.c */
526
7a4d29f4 527extern int vt_ioctl(struct tty_struct *tty, struct file *file,
1da177e4
LT		 528 unsigned int cmd, unsigned long arg);
529
1da177e4
LT		 530#endif /* __KERNEL__ */
531#endif
Linux 6.x block layer and io_uring tree(s)