Version:
~ [ 0.6-2.3.46 ] ~
Architecture:
~ [ um ] ~
** Warning: Cannot open xref database.
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
8 /*
9 * These constants are also useful for user-level apps (e.g., VC
10 * resizing).
11 */
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) */
17
18 #ifdef __KERNEL__
19 #include <linux/config.h>
20 #include <linux/fs.h>
21 #include <linux/major.h>
22 #include <linux/termios.h>
23 #include <linux/tqueue.h>
24 #include <linux/tty_driver.h>
25 #include <linux/tty_ldisc.h>
26
27 #include <asm/system.h>
28
29
30 /*
31 * Note: don't mess with NR_PTYS until you understand the tty minor
32 * number allocation game...
33 * (Note: the *_driver.minor_start values 1, 64, 128, 192 are
34 * hardcoded at present.)
35 */
36 #define NR_PTYS 256 /* ptys/major */
37 #define NR_LDISCS 16
38
39 /*
40 * Unix98 PTY's can be defined as any multiple of NR_PTYS up to
41 * UNIX98_PTY_MAJOR_COUNT; this section defines what we need from the
42 * config options
43 */
44 #ifdef CONFIG_UNIX98_PTYS
45 # define UNIX98_NR_MAJORS ((CONFIG_UNIX98_PTY_COUNT+NR_PTYS-1)/NR_PTYS)
46 # if UNIX98_NR_MAJORS <= 0
47 # undef CONFIG_UNIX98_PTYS
48 # elif UNIX98_NR_MAJORS > UNIX98_PTY_MAJOR_COUNT
49 # error Too many Unix98 ptys defined
50 # undef UNIX98_NR_MAJORS
51 # define UNIX98_NR_MAJORS UNIX98_PTY_MAJOR_COUNT
52 # endif
53 #endif
54
55 /*
56 * These are set up by the setup-routine at boot-time:
57 */
58
59 struct screen_info {
60 unsigned char orig_x; /* 0x00 */
61 unsigned char orig_y; /* 0x01 */
62 unsigned short dontuse1; /* 0x02 -- EXT_MEM_K sits here */
63 unsigned short orig_video_page; /* 0x04 */
64 unsigned char orig_video_mode; /* 0x06 */
65 unsigned char orig_video_cols; /* 0x07 */
66 unsigned short unused2; /* 0x08 */
67 unsigned short orig_video_ega_bx; /* 0x0a */
68 unsigned short unused3; /* 0x0c */
69 unsigned char orig_video_lines; /* 0x0e */
70 unsigned char orig_video_isVGA; /* 0x0f */
71 unsigned short orig_video_points; /* 0x10 */
72
73 /* VESA graphic mode -- linear frame buffer */
74 unsigned short lfb_width; /* 0x12 */
75 unsigned short lfb_height; /* 0x14 */
76 unsigned short lfb_depth; /* 0x16 */
77 unsigned long lfb_base; /* 0x18 */
78 unsigned long lfb_size; /* 0x1c */
79 unsigned short dontuse2, dontuse3; /* 0x20 -- CL_MAGIC and CL_OFFSET here */
80 unsigned short lfb_linelength; /* 0x24 */
81 unsigned char red_size; /* 0x26 */
82 unsigned char red_pos; /* 0x27 */
83 unsigned char green_size; /* 0x28 */
84 unsigned char green_pos; /* 0x29 */
85 unsigned char blue_size; /* 0x2a */
86 unsigned char blue_pos; /* 0x2b */
87 unsigned char rsvd_size; /* 0x2c */
88 unsigned char rsvd_pos; /* 0x2d */
89 unsigned short vesapm_seg; /* 0x2e */
90 unsigned short vesapm_off; /* 0x30 */
91 unsigned short pages; /* 0x32 */
92 /* 0x34 -- 0x3f reserved for future expansion */
93 };
94
95 extern struct screen_info screen_info;
96
97 #define ORIG_X (screen_info.orig_x)
98 #define ORIG_Y (screen_info.orig_y)
99 #define ORIG_VIDEO_MODE (screen_info.orig_video_mode)
100 #define ORIG_VIDEO_COLS (screen_info.orig_video_cols)
101 #define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx)
102 #define ORIG_VIDEO_LINES (screen_info.orig_video_lines)
103 #define ORIG_VIDEO_ISVGA (screen_info.orig_video_isVGA)
104 #define ORIG_VIDEO_POINTS (screen_info.orig_video_points)
105
106 #define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */
107 #define VIDEO_TYPE_CGA 0x11 /* CGA Display */
108 #define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */
109 #define VIDEO_TYPE_EGAC 0x21 /* EGA in Color Mode */
110 #define VIDEO_TYPE_VGAC 0x22 /* VGA+ in Color Mode */
111 #define VIDEO_TYPE_VLFB 0x23 /* VESA VGA in graphic mode */
112
113 #define VIDEO_TYPE_TGAC 0x40 /* DEC TGA */
114
115 #define VIDEO_TYPE_SUN 0x50 /* Sun frame buffer. */
116 #define VIDEO_TYPE_SUNPCI 0x51 /* Sun PCI based frame buffer. */
117
118 #define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */
119
120 #define VIDEO_TYPE_SGI 0x70 /* Various SGI graphics hardware */
121 #define VIDEO_TYPE_MIPS_G364 0x71 /* MIPS Magnum 4000 G364 video */
122
123 /*
124 * This character is the same as _POSIX_VDISABLE: it cannot be used as
125 * a c_cc[] character, but indicates that a particular special character
126 * isn't in use (eg VINTR has no character etc)
127 */
128 #define __DISABLED_CHAR '\0'
129
130 /*
131 * This is the flip buffer used for the tty driver. The buffer is
132 * located in the tty structure, and is used as a high speed interface
133 * between the tty driver and the tty line discipline.
134 */
135 #define TTY_FLIPBUF_SIZE 512
136
137 struct tty_flip_buffer {
138 struct tq_struct tqueue;
139 struct semaphore pty_sem;
140 char *char_buf_ptr;
141 unsigned char *flag_buf_ptr;
142 int count;
143 int buf_num;
144 unsigned char char_buf[2*TTY_FLIPBUF_SIZE];
145 char flag_buf[2*TTY_FLIPBUF_SIZE];
146 unsigned char slop[4]; /* N.B. bug overwrites buffer by 1 */
147 };
148 /*
149 * The pty uses char_buf and flag_buf as a contiguous buffer
150 */
151 #define PTY_BUF_SIZE 4*TTY_FLIPBUF_SIZE
152
153 /*
154 * When a break, frame error, or parity error happens, these codes are
155 * stuffed into the flags buffer.
156 */
157 #define TTY_NORMAL 0
158 #define TTY_BREAK 1
159 #define TTY_FRAME 2
160 #define TTY_PARITY 3
161 #define TTY_OVERRUN 4
162
163 #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
164 #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
165 #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
166 #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
167 #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
168 #define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
169 #define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
170 #define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
171 #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
172 #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
173 #define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
174 #define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
175 #define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
176 #define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
177 #define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
178 #define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
179 #define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
180
181 #define _I_FLAG(tty,f) ((tty)->termios->c_iflag & (f))
182 #define _O_FLAG(tty,f) ((tty)->termios->c_oflag & (f))
183 #define _C_FLAG(tty,f) ((tty)->termios->c_cflag & (f))
184 #define _L_FLAG(tty,f) ((tty)->termios->c_lflag & (f))
185
186 #define I_IGNBRK(tty) _I_FLAG((tty),IGNBRK)
187 #define I_BRKINT(tty) _I_FLAG((tty),BRKINT)
188 #define I_IGNPAR(tty) _I_FLAG((tty),IGNPAR)
189 #define I_PARMRK(tty) _I_FLAG((tty),PARMRK)
190 #define I_INPCK(tty) _I_FLAG((tty),INPCK)
191 #define I_ISTRIP(tty) _I_FLAG((tty),ISTRIP)
192 #define I_INLCR(tty) _I_FLAG((tty),INLCR)
193 #define I_IGNCR(tty) _I_FLAG((tty),IGNCR)
194 #define I_ICRNL(tty) _I_FLAG((tty),ICRNL)
195 #define I_IUCLC(tty) _I_FLAG((tty),IUCLC)
196 #define I_IXON(tty) _I_FLAG((tty),IXON)
197 #define I_IXANY(tty) _I_FLAG((tty),IXANY)
198 #define I_IXOFF(tty) _I_FLAG((tty),IXOFF)
199 #define I_IMAXBEL(tty) _I_FLAG((tty),IMAXBEL)
200
201 #define O_OPOST(tty) _O_FLAG((tty),OPOST)
202 #define O_OLCUC(tty) _O_FLAG((tty),OLCUC)
203 #define O_ONLCR(tty) _O_FLAG((tty),ONLCR)
204 #define O_OCRNL(tty) _O_FLAG((tty),OCRNL)
205 #define O_ONOCR(tty) _O_FLAG((tty),ONOCR)
206 #define O_ONLRET(tty) _O_FLAG((tty),ONLRET)
207 #define O_OFILL(tty) _O_FLAG((tty),OFILL)
208 #define O_OFDEL(tty) _O_FLAG((tty),OFDEL)
209 #define O_NLDLY(tty) _O_FLAG((tty),NLDLY)
210 #define O_CRDLY(tty) _O_FLAG((tty),CRDLY)
211 #define O_TABDLY(tty) _O_FLAG((tty),TABDLY)
212 #define O_BSDLY(tty) _O_FLAG((tty),BSDLY)
213 #define O_VTDLY(tty) _O_FLAG((tty),VTDLY)
214 #define O_FFDLY(tty) _O_FLAG((tty),FFDLY)
215
216 #define C_BAUD(tty) _C_FLAG((tty),CBAUD)
217 #define C_CSIZE(tty) _C_FLAG((tty),CSIZE)
218 #define C_CSTOPB(tty) _C_FLAG((tty),CSTOPB)
219 #define C_CREAD(tty) _C_FLAG((tty),CREAD)
220 #define C_PARENB(tty) _C_FLAG((tty),PARENB)
221 #define C_PARODD(tty) _C_FLAG((tty),PARODD)
222 #define C_HUPCL(tty) _C_FLAG((tty),HUPCL)
223 #define C_CLOCAL(tty) _C_FLAG((tty),CLOCAL)
224 #define C_CIBAUD(tty) _C_FLAG((tty),CIBAUD)
225 #define C_CRTSCTS(tty) _C_FLAG((tty),CRTSCTS)
226
227 #define L_ISIG(tty) _L_FLAG((tty),ISIG)
228 #define L_ICANON(tty) _L_FLAG((tty),ICANON)
229 #define L_XCASE(tty) _L_FLAG((tty),XCASE)
230 #define L_ECHO(tty) _L_FLAG((tty),ECHO)
231 #define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
232 #define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
233 #define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
234 #define L_NOFLSH(tty) _L_FLAG((tty),NOFLSH)
235 #define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
236 #define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
237 #define L_ECHOPRT(tty) _L_FLAG((tty),ECHOPRT)
238 #define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
239 #define L_FLUSHO(tty) _L_FLAG((tty),FLUSHO)
240 #define L_PENDIN(tty) _L_FLAG((tty),PENDIN)
241 #define L_IEXTEN(tty) _L_FLAG((tty),IEXTEN)
242
243 /*
244 * Where all of the state associated with a tty is kept while the tty
245 * is open. Since the termios state should be kept even if the tty
246 * has been closed --- for things like the baud rate, etc --- it is
247 * not stored here, but rather a pointer to the real state is stored
248 * here. Possible the winsize structure should have the same
249 * treatment, but (1) the default 80x24 is usually right and (2) it's
250 * most often used by a windowing system, which will set the correct
251 * size each time the window is created or resized anyway.
252 * IMPORTANT: since this structure is dynamically allocated, it must
253 * be no larger than 4096 bytes. Changing TTY_FLIPBUF_SIZE will change
254 * the size of this structure, and it needs to be done with care.
255 * - TYT, 9/14/92
256 */
257 struct tty_struct {
258 int magic;
259 struct tty_driver driver;
260 struct tty_ldisc ldisc;
261 struct termios *termios, *termios_locked;
262 int pgrp;
263 int session;
264 kdev_t device;
265 unsigned long flags;
266 int count;
267 struct winsize winsize;
268 unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
269 unsigned char low_latency:1, warned:1;
270 unsigned char ctrl_status;
271
272 struct tty_struct *link;
273 struct fasync_struct *fasync;
274 struct tty_flip_buffer flip;
275 int max_flip_cnt;
276 int alt_speed; /* For magic substitution of 38400 bps */
277 wait_queue_head_t write_wait;
278 wait_queue_head_t read_wait;
279 struct tq_struct tq_hangup;
280 void *disc_data;
281 void *driver_data;
282 struct list_head tty_files;
283
284 #define N_TTY_BUF_SIZE 4096
285
286 /*
287 * The following is data for the N_TTY line discipline. For
288 * historical reasons, this is included in the tty structure.
289 */
290 unsigned int column;
291 unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
292 unsigned char closing:1;
293 unsigned short minimum_to_wake;
294 unsigned overrun_time;
295 int num_overrun;
296 unsigned long process_char_map[256/(8*sizeof(unsigned long))];
297 char *read_buf;
298 int read_head;
299 int read_tail;
300 int read_cnt;
301 unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
302 int canon_data;
303 unsigned long canon_head;
304 unsigned int canon_column;
305 struct semaphore atomic_read;
306 };
307
308 /* tty magic number */
309 #define TTY_MAGIC 0x5401
310
311 /*
312 * These bits are used in the flags field of the tty structure.
313 *
314 * So that interrupts won't be able to mess up the queues,
315 * copy_to_cooked must be atomic with respect to itself, as must
316 * tty->write. Thus, you must use the inline functions set_bit() and
317 * clear_bit() to make things atomic.
318 */
319 #define TTY_THROTTLED 0
320 #define TTY_IO_ERROR 1
321 #define TTY_OTHER_CLOSED 2
322 #define TTY_EXCLUSIVE 3
323 #define TTY_DEBUG 4
324 #define TTY_DO_WRITE_WAKEUP 5
325 #define TTY_PUSH 6
326 #define TTY_CLOSING 7
327 #define TTY_DONT_FLIP 8
328 #define TTY_HW_COOK_OUT 14
329 #define TTY_HW_COOK_IN 15
330 #define TTY_PTY_LOCK 16
331 #define TTY_NO_WRITE_SPLIT 17
332
333 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
334
335 extern void tty_write_flush(struct tty_struct *);
336
337 extern struct termios tty_std_termios;
338 extern struct tty_struct * redirect;
339 extern struct tty_ldisc ldiscs[];
340 extern int fg_console, last_console, want_console;
341
342 extern int kmsg_redirect;
343
344 extern void con_init(void);
345 extern void console_init(void);
346
347 extern int rs_init(void);
348 extern int lp_init(void);
349 extern int pty_init(void);
350 extern void tty_init(void);
351 extern int mxser_init(void);
352 extern int moxa_init(void);
353 extern int ip2_init(void);
354 extern int pcxe_init(void);
355 extern int pc_init(void);
356 extern int vcs_init(void);
357 extern int rp_init(void);
358 extern int cy_init(void);
359 extern int stl_init(void);
360 extern int stli_init(void);
361 extern int riscom8_init(void);
362 extern int specialix_init(void);
363 extern int espserial_init(void);
364 extern int macserial_init(void);
365 extern int stdio_init(void);
366
367 extern int tty_paranoia_check(struct tty_struct *tty, kdev_t device,
368 const char *routine);
369 extern char *tty_name(struct tty_struct *tty, char *buf);
370 extern void tty_wait_until_sent(struct tty_struct * tty, long timeout);
371 extern int tty_check_change(struct tty_struct * tty);
372 extern void stop_tty(struct tty_struct * tty);
373 extern void start_tty(struct tty_struct * tty);
374 extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc);
375 extern int tty_register_driver(struct tty_driver *driver);
376 extern int tty_unregister_driver(struct tty_driver *driver);
377 extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
378 int buflen);
379 extern void tty_write_message(struct tty_struct *tty, char *msg);
380
381 extern int is_orphaned_pgrp(int pgrp);
382 extern int is_ignored(int sig);
383 extern int tty_signal(int sig, struct tty_struct *tty);
384 extern void tty_hangup(struct tty_struct * tty);
385 extern void tty_vhangup(struct tty_struct * tty);
386 extern void tty_unhangup(struct file *filp);
387 extern int tty_hung_up_p(struct file * filp);
388 extern void do_SAK(struct tty_struct *tty);
389 extern void disassociate_ctty(int priv);
390 extern void tty_flip_buffer_push(struct tty_struct *tty);
391 extern int tty_get_baud_rate(struct tty_struct *tty);
392
393 /* n_tty.c */
394 extern struct tty_ldisc tty_ldisc_N_TTY;
395
396 /* tty_ioctl.c */
397 extern int n_tty_ioctl(struct tty_struct * tty, struct file * file,
398 unsigned int cmd, unsigned long arg);
399
400 /* serial.c */
401
402 extern void serial_console_init(void);
403
404 /* pcxx.c */
405
406 extern int pcxe_open(struct tty_struct *tty, struct file *filp);
407
408 /* printk.c */
409
410 extern void console_print(const char *);
411
412 /* vt.c */
413
414 extern int vt_ioctl(struct tty_struct *tty, struct file * file,
415 unsigned int cmd, unsigned long arg);
416
417 extern void stdio_console_init(void);
418
419 #endif /* __KERNEL__ */
420 #endif
421
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