5 * 'tty.h' defines some structures used by tty_io.c and some defines.
9 * These constants are also useful for user-level apps (e.g., VC
12 #define MIN_NR_CONSOLES 1 /* must be at least 1 */
13 #define MAX_NR_CONSOLES 63 /* serial lines start at 64 */
14 #define MAX_NR_USER_CONSOLES 63 /* must be root to allocate above this */
15 /* Note: the ioctl VT_GETSTATE does not work for
16 consoles 16 and higher (since it returns a short) */
19 #include <linux/config.h>
21 #include <linux/major.h>
22 #include <linux/termios.h>
23 #include <linux/workqueue.h>
24 #include <linux/tty_driver.h>
25 #include <linux/tty_ldisc.h>
27 #include <asm/system.h>
31 * (Note: the *_driver.minor_start values 1, 64, 128, 192 are
32 * hardcoded at present.)
34 #define NR_PTYS CONFIG_LEGACY_PTY_COUNT /* Number of legacy ptys */
35 #define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
36 #define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
40 * These are set up by the setup-routine at boot-time:
46 u16 dontuse1; /* 0x02 -- EXT_MEM_K sits here */
47 u16 orig_video_page; /* 0x04 */
48 u8 orig_video_mode; /* 0x06 */
49 u8 orig_video_cols; /* 0x07 */
50 u16 unused2; /* 0x08 */
51 u16 orig_video_ega_bx; /* 0x0a */
52 u16 unused3; /* 0x0c */
53 u8 orig_video_lines; /* 0x0e */
54 u8 orig_video_isVGA; /* 0x0f */
55 u16 orig_video_points; /* 0x10 */
57 /* VESA graphic mode -- linear frame buffer */
58 u16 lfb_width; /* 0x12 */
59 u16 lfb_height; /* 0x14 */
60 u16 lfb_depth; /* 0x16 */
61 u32 lfb_base; /* 0x18 */
62 u32 lfb_size; /* 0x1c */
63 u16 dontuse2, dontuse3; /* 0x20 -- CL_MAGIC and CL_OFFSET here */
64 u16 lfb_linelength; /* 0x24 */
65 u8 red_size; /* 0x26 */
66 u8 red_pos; /* 0x27 */
67 u8 green_size; /* 0x28 */
68 u8 green_pos; /* 0x29 */
69 u8 blue_size; /* 0x2a */
70 u8 blue_pos; /* 0x2b */
71 u8 rsvd_size; /* 0x2c */
72 u8 rsvd_pos; /* 0x2d */
73 u16 vesapm_seg; /* 0x2e */
74 u16 vesapm_off; /* 0x30 */
76 u16 vesa_attributes; /* 0x34 */
77 /* 0x36 -- 0x3f reserved for future expansion */
80 extern struct screen_info screen_info;
82 #define ORIG_X (screen_info.orig_x)
83 #define ORIG_Y (screen_info.orig_y)
84 #define ORIG_VIDEO_MODE (screen_info.orig_video_mode)
85 #define ORIG_VIDEO_COLS (screen_info.orig_video_cols)
86 #define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx)
87 #define ORIG_VIDEO_LINES (screen_info.orig_video_lines)
88 #define ORIG_VIDEO_ISVGA (screen_info.orig_video_isVGA)
89 #define ORIG_VIDEO_POINTS (screen_info.orig_video_points)
91 #define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */
92 #define VIDEO_TYPE_CGA 0x11 /* CGA Display */
93 #define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */
94 #define VIDEO_TYPE_EGAC 0x21 /* EGA in Color Mode */
95 #define VIDEO_TYPE_VGAC 0x22 /* VGA+ in Color Mode */
96 #define VIDEO_TYPE_VLFB 0x23 /* VESA VGA in graphic mode */
98 #define VIDEO_TYPE_PICA_S3 0x30 /* ACER PICA-61 local S3 video */
99 #define VIDEO_TYPE_MIPS_G364 0x31 /* MIPS Magnum 4000 G364 video */
100 #define VIDEO_TYPE_SGI 0x33 /* Various SGI graphics hardware */
102 #define VIDEO_TYPE_TGAC 0x40 /* DEC TGA */
104 #define VIDEO_TYPE_SUN 0x50 /* Sun frame buffer. */
105 #define VIDEO_TYPE_SUNPCI 0x51 /* Sun PCI based frame buffer. */
107 #define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */
110 * This character is the same as _POSIX_VDISABLE: it cannot be used as
111 * a c_cc[] character, but indicates that a particular special character
112 * isn't in use (eg VINTR has no character etc)
114 #define __DISABLED_CHAR '\0'
117 * This is the flip buffer used for the tty driver. The buffer is
118 * located in the tty structure, and is used as a high speed interface
119 * between the tty driver and the tty line discipline.
121 #define TTY_FLIPBUF_SIZE 512
123 struct tty_flip_buffer {
124 struct work_struct work;
125 struct semaphore pty_sem;
127 unsigned char *flag_buf_ptr;
130 unsigned char char_buf[2*TTY_FLIPBUF_SIZE];
131 char flag_buf[2*TTY_FLIPBUF_SIZE];
132 unsigned char slop[4]; /* N.B. bug overwrites buffer by 1 */
135 * The pty uses char_buf and flag_buf as a contiguous buffer
137 #define PTY_BUF_SIZE 4*TTY_FLIPBUF_SIZE
140 * When a break, frame error, or parity error happens, these codes are
141 * stuffed into the flags buffer.
147 #define TTY_OVERRUN 4
149 #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
150 #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
151 #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
152 #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
153 #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
154 #define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
155 #define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
156 #define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
157 #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
158 #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
159 #define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
160 #define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
161 #define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
162 #define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
163 #define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
164 #define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
165 #define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
167 #define _I_FLAG(tty,f) ((tty)->termios->c_iflag & (f))
168 #define _O_FLAG(tty,f) ((tty)->termios->c_oflag & (f))
169 #define _C_FLAG(tty,f) ((tty)->termios->c_cflag & (f))
170 #define _L_FLAG(tty,f) ((tty)->termios->c_lflag & (f))
172 #define I_IGNBRK(tty) _I_FLAG((tty),IGNBRK)
173 #define I_BRKINT(tty) _I_FLAG((tty),BRKINT)
174 #define I_IGNPAR(tty) _I_FLAG((tty),IGNPAR)
175 #define I_PARMRK(tty) _I_FLAG((tty),PARMRK)
176 #define I_INPCK(tty) _I_FLAG((tty),INPCK)
177 #define I_ISTRIP(tty) _I_FLAG((tty),ISTRIP)
178 #define I_INLCR(tty) _I_FLAG((tty),INLCR)
179 #define I_IGNCR(tty) _I_FLAG((tty),IGNCR)
180 #define I_ICRNL(tty) _I_FLAG((tty),ICRNL)
181 #define I_IUCLC(tty) _I_FLAG((tty),IUCLC)
182 #define I_IXON(tty) _I_FLAG((tty),IXON)
183 #define I_IXANY(tty) _I_FLAG((tty),IXANY)
184 #define I_IXOFF(tty) _I_FLAG((tty),IXOFF)
185 #define I_IMAXBEL(tty) _I_FLAG((tty),IMAXBEL)
186 #define I_IUTF8(tty) _I_FLAG((tty),IUTF8)
188 #define O_OPOST(tty) _O_FLAG((tty),OPOST)
189 #define O_OLCUC(tty) _O_FLAG((tty),OLCUC)
190 #define O_ONLCR(tty) _O_FLAG((tty),ONLCR)
191 #define O_OCRNL(tty) _O_FLAG((tty),OCRNL)
192 #define O_ONOCR(tty) _O_FLAG((tty),ONOCR)
193 #define O_ONLRET(tty) _O_FLAG((tty),ONLRET)
194 #define O_OFILL(tty) _O_FLAG((tty),OFILL)
195 #define O_OFDEL(tty) _O_FLAG((tty),OFDEL)
196 #define O_NLDLY(tty) _O_FLAG((tty),NLDLY)
197 #define O_CRDLY(tty) _O_FLAG((tty),CRDLY)
198 #define O_TABDLY(tty) _O_FLAG((tty),TABDLY)
199 #define O_BSDLY(tty) _O_FLAG((tty),BSDLY)
200 #define O_VTDLY(tty) _O_FLAG((tty),VTDLY)
201 #define O_FFDLY(tty) _O_FLAG((tty),FFDLY)
203 #define C_BAUD(tty) _C_FLAG((tty),CBAUD)
204 #define C_CSIZE(tty) _C_FLAG((tty),CSIZE)
205 #define C_CSTOPB(tty) _C_FLAG((tty),CSTOPB)
206 #define C_CREAD(tty) _C_FLAG((tty),CREAD)
207 #define C_PARENB(tty) _C_FLAG((tty),PARENB)
208 #define C_PARODD(tty) _C_FLAG((tty),PARODD)
209 #define C_HUPCL(tty) _C_FLAG((tty),HUPCL)
210 #define C_CLOCAL(tty) _C_FLAG((tty),CLOCAL)
211 #define C_CIBAUD(tty) _C_FLAG((tty),CIBAUD)
212 #define C_CRTSCTS(tty) _C_FLAG((tty),CRTSCTS)
214 #define L_ISIG(tty) _L_FLAG((tty),ISIG)
215 #define L_ICANON(tty) _L_FLAG((tty),ICANON)
216 #define L_XCASE(tty) _L_FLAG((tty),XCASE)
217 #define L_ECHO(tty) _L_FLAG((tty),ECHO)
218 #define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
219 #define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
220 #define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
221 #define L_NOFLSH(tty) _L_FLAG((tty),NOFLSH)
222 #define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
223 #define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
224 #define L_ECHOPRT(tty) _L_FLAG((tty),ECHOPRT)
225 #define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
226 #define L_FLUSHO(tty) _L_FLAG((tty),FLUSHO)
227 #define L_PENDIN(tty) _L_FLAG((tty),PENDIN)
228 #define L_IEXTEN(tty) _L_FLAG((tty),IEXTEN)
232 * Where all of the state associated with a tty is kept while the tty
233 * is open. Since the termios state should be kept even if the tty
234 * has been closed --- for things like the baud rate, etc --- it is
235 * not stored here, but rather a pointer to the real state is stored
236 * here. Possible the winsize structure should have the same
237 * treatment, but (1) the default 80x24 is usually right and (2) it's
238 * most often used by a windowing system, which will set the correct
239 * size each time the window is created or resized anyway.
244 struct tty_driver *driver;
246 struct tty_ldisc ldisc;
247 struct semaphore termios_sem;
248 struct termios *termios, *termios_locked;
254 struct winsize winsize;
255 unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
256 unsigned char low_latency:1, warned:1;
257 unsigned char ctrl_status;
259 struct tty_struct *link;
260 struct fasync_struct *fasync;
261 struct tty_flip_buffer flip;
263 int alt_speed; /* For magic substitution of 38400 bps */
264 wait_queue_head_t write_wait;
265 wait_queue_head_t read_wait;
266 struct work_struct hangup_work;
269 struct list_head tty_files;
271 #define N_TTY_BUF_SIZE 4096
274 * The following is data for the N_TTY line discipline. For
275 * historical reasons, this is included in the tty structure.
278 unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
279 unsigned char closing:1;
280 unsigned short minimum_to_wake;
281 unsigned long overrun_time;
283 unsigned long process_char_map[256/(8*sizeof(unsigned long))];
288 unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
290 unsigned long canon_head;
291 unsigned int canon_column;
292 struct semaphore atomic_read;
293 struct semaphore atomic_write;
294 unsigned char *write_buf;
296 spinlock_t read_lock;
297 /* If the tty has a pending do_SAK, queue it here - akpm */
298 struct work_struct SAK_work;
301 /* tty magic number */
302 #define TTY_MAGIC 0x5401
305 * These bits are used in the flags field of the tty structure.
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.
312 #define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */
313 #define TTY_IO_ERROR 1 /* Canse an I/O error (may be no ldisc too) */
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 */
320 #define TTY_DONT_FLIP 8 /* Defer buffer flip */
321 #define TTY_LDISC 9 /* Line discipline attached */
322 #define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */
323 #define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */
324 #define TTY_PTY_LOCK 16 /* pty private */
325 #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */
326 #define TTY_HUPPED 18 /* Post driver->hangup() */
328 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
330 extern void tty_write_flush(struct tty_struct *);
332 extern struct termios tty_std_termios;
333 extern int fg_console, last_console, want_console;
335 extern int kmsg_redirect;
337 extern void console_init(void);
338 extern int vcs_init(void);
340 extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
341 const char *routine);
342 extern char *tty_name(struct tty_struct *tty, char *buf);
343 extern void tty_wait_until_sent(struct tty_struct * tty, long timeout);
344 extern int tty_check_change(struct tty_struct * tty);
345 extern void stop_tty(struct tty_struct * tty);
346 extern void start_tty(struct tty_struct * tty);
347 extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc);
348 extern int tty_unregister_ldisc(int disc);
349 extern int tty_register_driver(struct tty_driver *driver);
350 extern int tty_unregister_driver(struct tty_driver *driver);
351 extern void tty_register_device(struct tty_driver *driver, unsigned index, struct device *dev);
352 extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
353 extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
355 extern void tty_write_message(struct tty_struct *tty, char *msg);
357 extern int is_orphaned_pgrp(int pgrp);
358 extern int is_ignored(int sig);
359 extern int tty_signal(int sig, struct tty_struct *tty);
360 extern void tty_hangup(struct tty_struct * tty);
361 extern void tty_vhangup(struct tty_struct * tty);
362 extern void tty_unhangup(struct file *filp);
363 extern int tty_hung_up_p(struct file * filp);
364 extern void do_SAK(struct tty_struct *tty);
365 extern void disassociate_ctty(int priv);
366 extern void tty_flip_buffer_push(struct tty_struct *tty);
367 extern int tty_get_baud_rate(struct tty_struct *tty);
368 extern int tty_termios_baud_rate(struct termios *termios);
370 extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
371 extern void tty_ldisc_deref(struct tty_ldisc *);
372 extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *);
374 extern struct tty_ldisc *tty_ldisc_get(int);
375 extern void tty_ldisc_put(int);
377 extern void tty_wakeup(struct tty_struct *tty);
378 extern void tty_ldisc_flush(struct tty_struct *tty);
381 extern struct semaphore tty_sem;
384 extern struct tty_ldisc tty_ldisc_N_TTY;
387 extern int n_tty_ioctl(struct tty_struct * tty, struct file * file,
388 unsigned int cmd, unsigned long arg);
392 extern void serial_console_init(void);
396 extern int pcxe_open(struct tty_struct *tty, struct file *filp);
400 extern void console_print(const char *);
404 extern int vt_ioctl(struct tty_struct *tty, struct file * file,
405 unsigned int cmd, unsigned long arg);
407 static inline dev_t tty_devnum(struct tty_struct *tty)
409 return MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index;
412 #endif /* __KERNEL__ */