5 * 'tty.h' defines some structures used by tty_io.c and some defines.
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>
15 #include <linux/mutex.h>
17 #include <asm/system.h>
21 * (Note: the *_driver.minor_start values 1, 64, 128, 192 are
22 * hardcoded at present.)
24 #define NR_PTYS CONFIG_LEGACY_PTY_COUNT /* Number of legacy ptys */
25 #define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
26 #define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
29 /* line disciplines */
36 #define N_X25 6 /* X.25 async */
38 #define N_MASC 8 /* Reserved for Mobitex module <kaz@cafe.net> */
39 #define N_R3964 9 /* Reserved for Simatic R3964 module */
40 #define N_PROFIBUS_FDL 10 /* Reserved for Profibus <Dave@mvhi.com> */
41 #define N_IRDA 11 /* Linux IrDa - http://irda.sourceforge.net/ */
42 #define N_SMSBLOCK 12 /* SMS block mode - for talking to GSM data */
43 /* cards about SMS messages */
44 #define N_HDLC 13 /* synchronous HDLC */
45 #define N_SYNC_PPP 14 /* synchronous PPP */
46 #define N_HCI 15 /* Bluetooth HCI UART */
47 #define N_GIGASET_M101 16 /* Siemens Gigaset M101 serial DECT adapter */
50 * This character is the same as _POSIX_VDISABLE: it cannot be used as
51 * a c_cc[] character, but indicates that a particular special character
52 * isn't in use (eg VINTR has no character etc)
54 #define __DISABLED_CHAR '\0'
57 * This is the flip buffer used for the tty driver. The buffer is
58 * located in the tty structure, and is used as a high speed interface
59 * between the tty driver and the tty line discipline.
61 #define TTY_FLIPBUF_SIZE 512
64 struct tty_buffer *next;
66 unsigned char *flag_buf_ptr;
71 /* Data points here */
72 unsigned long data[0];
76 struct delayed_work work;
77 struct semaphore pty_sem;
79 struct tty_buffer *head; /* Queue head */
80 struct tty_buffer *tail; /* Active buffer */
81 struct tty_buffer *free; /* Free queue head */
82 int memory_used; /* Buffer space used excluding free queue */
85 * The pty uses char_buf and flag_buf as a contiguous buffer
87 #define PTY_BUF_SIZE 4*TTY_FLIPBUF_SIZE
90 * When a break, frame error, or parity error happens, these codes are
91 * stuffed into the flags buffer.
99 #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
100 #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
101 #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
102 #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
103 #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
104 #define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
105 #define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
106 #define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
107 #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
108 #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
109 #define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
110 #define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
111 #define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
112 #define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
113 #define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
114 #define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
115 #define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
117 #define _I_FLAG(tty,f) ((tty)->termios->c_iflag & (f))
118 #define _O_FLAG(tty,f) ((tty)->termios->c_oflag & (f))
119 #define _C_FLAG(tty,f) ((tty)->termios->c_cflag & (f))
120 #define _L_FLAG(tty,f) ((tty)->termios->c_lflag & (f))
122 #define I_IGNBRK(tty) _I_FLAG((tty),IGNBRK)
123 #define I_BRKINT(tty) _I_FLAG((tty),BRKINT)
124 #define I_IGNPAR(tty) _I_FLAG((tty),IGNPAR)
125 #define I_PARMRK(tty) _I_FLAG((tty),PARMRK)
126 #define I_INPCK(tty) _I_FLAG((tty),INPCK)
127 #define I_ISTRIP(tty) _I_FLAG((tty),ISTRIP)
128 #define I_INLCR(tty) _I_FLAG((tty),INLCR)
129 #define I_IGNCR(tty) _I_FLAG((tty),IGNCR)
130 #define I_ICRNL(tty) _I_FLAG((tty),ICRNL)
131 #define I_IUCLC(tty) _I_FLAG((tty),IUCLC)
132 #define I_IXON(tty) _I_FLAG((tty),IXON)
133 #define I_IXANY(tty) _I_FLAG((tty),IXANY)
134 #define I_IXOFF(tty) _I_FLAG((tty),IXOFF)
135 #define I_IMAXBEL(tty) _I_FLAG((tty),IMAXBEL)
136 #define I_IUTF8(tty) _I_FLAG((tty),IUTF8)
138 #define O_OPOST(tty) _O_FLAG((tty),OPOST)
139 #define O_OLCUC(tty) _O_FLAG((tty),OLCUC)
140 #define O_ONLCR(tty) _O_FLAG((tty),ONLCR)
141 #define O_OCRNL(tty) _O_FLAG((tty),OCRNL)
142 #define O_ONOCR(tty) _O_FLAG((tty),ONOCR)
143 #define O_ONLRET(tty) _O_FLAG((tty),ONLRET)
144 #define O_OFILL(tty) _O_FLAG((tty),OFILL)
145 #define O_OFDEL(tty) _O_FLAG((tty),OFDEL)
146 #define O_NLDLY(tty) _O_FLAG((tty),NLDLY)
147 #define O_CRDLY(tty) _O_FLAG((tty),CRDLY)
148 #define O_TABDLY(tty) _O_FLAG((tty),TABDLY)
149 #define O_BSDLY(tty) _O_FLAG((tty),BSDLY)
150 #define O_VTDLY(tty) _O_FLAG((tty),VTDLY)
151 #define O_FFDLY(tty) _O_FLAG((tty),FFDLY)
153 #define C_BAUD(tty) _C_FLAG((tty),CBAUD)
154 #define C_CSIZE(tty) _C_FLAG((tty),CSIZE)
155 #define C_CSTOPB(tty) _C_FLAG((tty),CSTOPB)
156 #define C_CREAD(tty) _C_FLAG((tty),CREAD)
157 #define C_PARENB(tty) _C_FLAG((tty),PARENB)
158 #define C_PARODD(tty) _C_FLAG((tty),PARODD)
159 #define C_HUPCL(tty) _C_FLAG((tty),HUPCL)
160 #define C_CLOCAL(tty) _C_FLAG((tty),CLOCAL)
161 #define C_CIBAUD(tty) _C_FLAG((tty),CIBAUD)
162 #define C_CRTSCTS(tty) _C_FLAG((tty),CRTSCTS)
164 #define L_ISIG(tty) _L_FLAG((tty),ISIG)
165 #define L_ICANON(tty) _L_FLAG((tty),ICANON)
166 #define L_XCASE(tty) _L_FLAG((tty),XCASE)
167 #define L_ECHO(tty) _L_FLAG((tty),ECHO)
168 #define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
169 #define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
170 #define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
171 #define L_NOFLSH(tty) _L_FLAG((tty),NOFLSH)
172 #define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
173 #define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
174 #define L_ECHOPRT(tty) _L_FLAG((tty),ECHOPRT)
175 #define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
176 #define L_FLUSHO(tty) _L_FLAG((tty),FLUSHO)
177 #define L_PENDIN(tty) _L_FLAG((tty),PENDIN)
178 #define L_IEXTEN(tty) _L_FLAG((tty),IEXTEN)
181 struct signal_struct;
183 * Where all of the state associated with a tty is kept while the tty
184 * is open. Since the termios state should be kept even if the tty
185 * has been closed --- for things like the baud rate, etc --- it is
186 * not stored here, but rather a pointer to the real state is stored
187 * here. Possible the winsize structure should have the same
188 * treatment, but (1) the default 80x24 is usually right and (2) it's
189 * most often used by a windowing system, which will set the correct
190 * size each time the window is created or resized anyway.
195 struct tty_driver *driver;
197 struct tty_ldisc ldisc;
198 struct mutex termios_mutex;
199 struct ktermios *termios, *termios_locked;
205 struct winsize winsize;
206 unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
207 unsigned char low_latency:1, warned:1;
208 unsigned char ctrl_status;
209 unsigned int receive_room; /* Bytes free for queue */
211 struct tty_struct *link;
212 struct fasync_struct *fasync;
213 struct tty_bufhead buf;
214 int alt_speed; /* For magic substitution of 38400 bps */
215 wait_queue_head_t write_wait;
216 wait_queue_head_t read_wait;
217 struct work_struct hangup_work;
220 struct list_head tty_files;
222 #define N_TTY_BUF_SIZE 4096
225 * The following is data for the N_TTY line discipline. For
226 * historical reasons, this is included in the tty structure.
229 unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
230 unsigned char closing:1;
231 unsigned short minimum_to_wake;
232 unsigned long overrun_time;
234 unsigned long process_char_map[256/(8*sizeof(unsigned long))];
239 unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
241 unsigned long canon_head;
242 unsigned int canon_column;
243 struct mutex atomic_read_lock;
244 struct mutex atomic_write_lock;
245 unsigned char *write_buf;
247 spinlock_t read_lock;
248 /* If the tty has a pending do_SAK, queue it here - akpm */
249 struct work_struct SAK_work;
252 /* tty magic number */
253 #define TTY_MAGIC 0x5401
256 * These bits are used in the flags field of the tty structure.
258 * So that interrupts won't be able to mess up the queues,
259 * copy_to_cooked must be atomic with respect to itself, as must
260 * tty->write. Thus, you must use the inline functions set_bit() and
261 * clear_bit() to make things atomic.
263 #define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */
264 #define TTY_IO_ERROR 1 /* Canse an I/O error (may be no ldisc too) */
265 #define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */
266 #define TTY_EXCLUSIVE 3 /* Exclusive open mode */
267 #define TTY_DEBUG 4 /* Debugging */
268 #define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */
269 #define TTY_PUSH 6 /* n_tty private */
270 #define TTY_CLOSING 7 /* ->close() in progress */
271 #define TTY_LDISC 9 /* Line discipline attached */
272 #define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */
273 #define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */
274 #define TTY_PTY_LOCK 16 /* pty private */
275 #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */
276 #define TTY_HUPPED 18 /* Post driver->hangup() */
278 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
280 extern void tty_write_flush(struct tty_struct *);
282 extern struct ktermios tty_std_termios;
284 extern int kmsg_redirect;
286 extern void console_init(void);
287 extern int vcs_init(void);
289 extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
290 const char *routine);
291 extern char *tty_name(struct tty_struct *tty, char *buf);
292 extern void tty_wait_until_sent(struct tty_struct * tty, long timeout);
293 extern int tty_check_change(struct tty_struct * tty);
294 extern void stop_tty(struct tty_struct * tty);
295 extern void start_tty(struct tty_struct * tty);
296 extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc);
297 extern int tty_unregister_ldisc(int disc);
298 extern int tty_register_driver(struct tty_driver *driver);
299 extern int tty_unregister_driver(struct tty_driver *driver);
300 extern struct device *tty_register_device(struct tty_driver *driver,
301 unsigned index, struct device *dev);
302 extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
303 extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
305 extern void tty_write_message(struct tty_struct *tty, char *msg);
307 extern int is_current_pgrp_orphaned(void);
308 extern int is_ignored(int sig);
309 extern int tty_signal(int sig, struct tty_struct *tty);
310 extern void tty_hangup(struct tty_struct * tty);
311 extern void tty_vhangup(struct tty_struct * tty);
312 extern void tty_unhangup(struct file *filp);
313 extern int tty_hung_up_p(struct file * filp);
314 extern int is_tty(struct file *filp);
315 extern void do_SAK(struct tty_struct *tty);
316 extern void __do_SAK(struct tty_struct *tty);
317 extern void disassociate_ctty(int priv);
318 extern void no_tty(void);
319 extern void tty_flip_buffer_push(struct tty_struct *tty);
320 extern speed_t tty_get_baud_rate(struct tty_struct *tty);
321 extern speed_t tty_termios_baud_rate(struct ktermios *termios);
322 extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
324 extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
325 extern void tty_ldisc_deref(struct tty_ldisc *);
326 extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *);
328 extern struct tty_ldisc *tty_ldisc_get(int);
329 extern void tty_ldisc_put(int);
331 extern void tty_wakeup(struct tty_struct *tty);
332 extern void tty_ldisc_flush(struct tty_struct *tty);
334 extern int tty_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
337 extern dev_t tty_devnum(struct tty_struct *tty);
338 extern void proc_clear_tty(struct task_struct *p);
339 extern struct tty_struct *get_current_tty(void);
341 extern struct mutex tty_mutex;
343 extern void tty_write_unlock(struct tty_struct *tty);
344 extern int tty_write_lock(struct tty_struct *tty, int ndelay);
345 #define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock))
350 extern struct tty_ldisc tty_ldisc_N_TTY;
354 extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
356 extern void tty_audit_exit(void);
357 extern void tty_audit_fork(struct signal_struct *sig);
358 extern void tty_audit_push(struct tty_struct *tty);
359 extern void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid);
360 extern void tty_audit_opening(void);
362 static inline void tty_audit_add_data(struct tty_struct *tty,
363 unsigned char *data, size_t size)
366 static inline void tty_audit_exit(void)
369 static inline void tty_audit_fork(struct signal_struct *sig)
372 static inline void tty_audit_push(struct tty_struct *tty)
375 static inline void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid)
378 static inline void tty_audit_opening(void)
384 extern int n_tty_ioctl(struct tty_struct * tty, struct file * file,
385 unsigned int cmd, unsigned long arg);
389 extern void serial_console_init(void);
393 extern int pcxe_open(struct tty_struct *tty, struct file *filp);
397 extern void console_print(const char *);
401 extern int vt_ioctl(struct tty_struct *tty, struct file * file,
402 unsigned int cmd, unsigned long arg);
404 #endif /* __KERNEL__ */