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_PICA_S3 0x30 /* ACER PICA-61 local S3 video */
114 #define VIDEO_TYPE_MIPS_G364 0x31 /* MIPS Magnum 4000 G364 video */
115 #define VIDEO_TYPE_SNI_RM 0x32 /* SNI RM200 PCI video */
116 #define VIDEO_TYPE_SGI 0x33 /* Various SGI graphics hardware */
117
118 #define VIDEO_TYPE_TGAC 0x40 /* DEC TGA */
119
120 #define VIDEO_TYPE_SUN 0x50 /* Sun frame buffer. */
121 #define VIDEO_TYPE_SUNPCI 0x51 /* Sun PCI based frame buffer. */
122
123 #define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */
124
125 /*
126 * This character is the same as _POSIX_VDISABLE: it cannot be used as
127 * a c_cc[] character, but indicates that a particular special character
128 * isn't in use (eg VINTR has no character etc)
129 */
130 #define __DISABLED_CHAR '\0'
131
132 /*
133 * This is the flip buffer used for the tty driver. The buffer is
134 * located in the tty structure, and is used as a high speed interface
135 * between the tty driver and the tty line discipline.
136 */
137 #define TTY_FLIPBUF_SIZE 512
138
139 struct tty_flip_buffer {
140 struct tq_struct tqueue;
141 struct semaphore pty_sem;
142 char *char_buf_ptr;
143 unsigned char *flag_buf_ptr;
144 int count;
145 int buf_num;
146 unsigned char char_buf[2*TTY_FLIPBUF_SIZE];
147 char flag_buf[2*TTY_FLIPBUF_SIZE];
148 unsigned char slop[4]; /* N.B. bug overwrites buffer by 1 */
149 };
150 /*
151 * The pty uses char_buf and flag_buf as a contiguous buffer
152 */
153 #define PTY_BUF_SIZE 4*TTY_FLIPBUF_SIZE
154
155 /*
156 * When a break, frame error, or parity error happens, these codes are
157 * stuffed into the flags buffer.
158 */
159 #define TTY_NORMAL 0
160 #define TTY_BREAK 1
161 #define TTY_FRAME 2
162 #define TTY_PARITY 3
163 #define TTY_OVERRUN 4
164
165 #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
166 #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
167 #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
168 #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
169 #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
170 #define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
171 #define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
172 #define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
173 #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
174 #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
175 #define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
176 #define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
177 #define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
178 #define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
179 #define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
180 #define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
181 #define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
182
183 #define _I_FLAG(tty,f) ((tty)->termios->c_iflag & (f))
184 #define _O_FLAG(tty,f) ((tty)->termios->c_oflag & (f))
185 #define _C_FLAG(tty,f) ((tty)->termios->c_cflag & (f))
186 #define _L_FLAG(tty,f) ((tty)->termios->c_lflag & (f))
187
188 #define I_IGNBRK(tty) _I_FLAG((tty),IGNBRK)
189 #define I_BRKINT(tty) _I_FLAG((tty),BRKINT)
190 #define I_IGNPAR(tty) _I_FLAG((tty),IGNPAR)
191 #define I_PARMRK(tty) _I_FLAG((tty),PARMRK)
192 #define I_INPCK(tty) _I_FLAG((tty),INPCK)
193 #define I_ISTRIP(tty) _I_FLAG((tty),ISTRIP)
194 #define I_INLCR(tty) _I_FLAG((tty),INLCR)
195 #define I_IGNCR(tty) _I_FLAG((tty),IGNCR)
196 #define I_ICRNL(tty) _I_FLAG((tty),ICRNL)
197 #define I_IUCLC(tty) _I_FLAG((tty),IUCLC)
198 #define I_IXON(tty) _I_FLAG((tty),IXON)
199 #define I_IXANY(tty) _I_FLAG((tty),IXANY)
200 #define I_IXOFF(tty) _I_FLAG((tty),IXOFF)
201 #define I_IMAXBEL(tty) _I_FLAG((tty),IMAXBEL)
202
203 #define O_OPOST(tty) _O_FLAG((tty),OPOST)
204 #define O_OLCUC(tty) _O_FLAG((tty),OLCUC)
205 #define O_ONLCR(tty) _O_FLAG((tty),ONLCR)
206 #define O_OCRNL(tty) _O_FLAG((tty),OCRNL)
207 #define O_ONOCR(tty) _O_FLAG((tty),ONOCR)
208 #define O_ONLRET(tty) _O_FLAG((tty),ONLRET)
209 #define O_OFILL(tty) _O_FLAG((tty),OFILL)
210 #define O_OFDEL(tty) _O_FLAG((tty),OFDEL)
211 #define O_NLDLY(tty) _O_FLAG((tty),NLDLY)
212 #define O_CRDLY(tty) _O_FLAG((tty),CRDLY)
213 #define O_TABDLY(tty) _O_FLAG((tty),TABDLY)
214 #define O_BSDLY(tty) _O_FLAG((tty),BSDLY)
215 #define O_VTDLY(tty) _O_FLAG((tty),VTDLY)
216 #define O_FFDLY(tty) _O_FLAG((tty),FFDLY)
217
218 #define C_BAUD(tty) _C_FLAG((tty),CBAUD)
219 #define C_CSIZE(tty) _C_FLAG((tty),CSIZE)
220 #define C_CSTOPB(tty) _C_FLAG((tty),CSTOPB)
221 #define C_CREAD(tty) _C_FLAG((tty),CREAD)
222 #define C_PARENB(tty) _C_FLAG((tty),PARENB)
223 #define C_PARODD(tty) _C_FLAG((tty),PARODD)
224 #define C_HUPCL(tty) _C_FLAG((tty),HUPCL)
225 #define C_CLOCAL(tty) _C_FLAG((tty),CLOCAL)
226 #define C_CIBAUD(tty) _C_FLAG((tty),CIBAUD)
227 #define C_CRTSCTS(tty) _C_FLAG((tty),CRTSCTS)
228
229 #define L_ISIG(tty) _L_FLAG((tty),ISIG)
230 #define L_ICANON(tty) _L_FLAG((tty),ICANON)
231 #define L_XCASE(tty) _L_FLAG((tty),XCASE)
232 #define L_ECHO(tty) _L_FLAG((tty),ECHO)
233 #define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
234 #define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
235 #define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
236 #define L_NOFLSH(tty) _L_FLAG((tty),NOFLSH)
237 #define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
238 #define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
239 #define L_ECHOPRT(tty) _L_FLAG((tty),ECHOPRT)
240 #define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
241 #define L_FLUSHO(tty) _L_FLAG((tty),FLUSHO)
242 #define L_PENDIN(tty) _L_FLAG((tty),PENDIN)
243 #define L_IEXTEN(tty) _L_FLAG((tty),IEXTEN)
244
245 /*
246 * Where all of the state associated with a tty is kept while the tty
247 * is open. Since the termios state should be kept even if the tty
248 * has been closed --- for things like the baud rate, etc --- it is
249 * not stored here, but rather a pointer to the real state is stored
250 * here. Possible the winsize structure should have the same
251 * treatment, but (1) the default 80x24 is usually right and (2) it's
252 * most often used by a windowing system, which will set the correct
253 * size each time the window is created or resized anyway.
254 * IMPORTANT: since this structure is dynamically allocated, it must
255 * be no larger than 4096 bytes. Changing TTY_FLIPBUF_SIZE will change
256 * the size of this structure, and it needs to be done with care.
257 * - TYT, 9/14/92
258 */
259 struct tty_struct {
260 int magic;
261 struct tty_driver driver;
262 struct tty_ldisc ldisc;
263 struct termios *termios, *termios_locked;
264 int pgrp;
265 int session;
266 kdev_t device;
267 unsigned long flags;
268 int count;
269 struct winsize winsize;
270 unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
271 unsigned char low_latency:1, warned:1;
272 unsigned char ctrl_status;
273
274 struct tty_struct *link;
275 struct fasync_struct *fasync;
276 struct tty_flip_buffer flip;
277 int max_flip_cnt;
278 int alt_speed; /* For magic substitution of 38400 bps */
279 wait_queue_head_t write_wait;
280 wait_queue_head_t read_wait;
281 struct tq_struct tq_hangup;
282 void *disc_data;
283 void *driver_data;
284 struct list_head tty_files;
285
286 #define N_TTY_BUF_SIZE 4096
287
288 /*
289 * The following is data for the N_TTY line discipline. For
290 * historical reasons, this is included in the tty structure.
291 */
292 unsigned int column;
293 unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
294 unsigned char closing:1;
295 unsigned short minimum_to_wake;
296 unsigned overrun_time;
297 int num_overrun;
298 unsigned long process_char_map[256/(8*sizeof(unsigned long))];
299 char *read_buf;
300 int read_head;
301 int read_tail;
302 int read_cnt;
303 unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
304 int canon_data;
305 unsigned long canon_head;
306 unsigned int canon_column;
307 struct semaphore atomic_read;
308 struct semaphore atomic_write;
309 spinlock_t read_lock;
310 };
311
312 /* tty magic number */
313 #define TTY_MAGIC 0x5401
314
315 /*
316 * These bits are used in the flags field of the tty structure.
317 *
318 * So that interrupts won't be able to mess up the queues,
319 * copy_to_cooked must be atomic with respect to itself, as must
320 * tty->write. Thus, you must use the inline functions set_bit() and
321 * clear_bit() to make things atomic.
322 */
323 #define TTY_THROTTLED 0
324 #define TTY_IO_ERROR 1
325 #define TTY_OTHER_CLOSED 2
326 #define TTY_EXCLUSIVE 3
327 #define TTY_DEBUG 4
328 #define TTY_DO_WRITE_WAKEUP 5
329 #define TTY_PUSH 6
330 #define TTY_CLOSING 7
331 #define TTY_DONT_FLIP 8
332 #define TTY_HW_COOK_OUT 14
333 #define TTY_HW_COOK_IN 15
334 #define TTY_PTY_LOCK 16
335 #define TTY_NO_WRITE_SPLIT 17
336
337 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
338
339 extern void tty_write_flush(struct tty_struct *);
340
341 extern struct termios tty_std_termios;
342 extern struct tty_struct * redirect;
343 extern struct tty_ldisc ldiscs[];
344 extern int fg_console, last_console, want_console;
345
346 extern int kmsg_redirect;
347
348 extern void con_init(void);
349 extern void console_init(void);
350
351 extern int lp_init(void);
352 extern int pty_init(void);
353 extern void tty_init(void);
354 extern int mxser_init(void);
355 extern int moxa_init(void);
356 extern int ip2_init(void);
357 extern int pcxe_init(void);
358 extern int pc_init(void);
359 extern int vcs_init(void);
360 extern int rp_init(void);
361 extern int cy_init(void);
362 extern int stl_init(void);
363 extern int stli_init(void);
364 extern int specialix_init(void);
365 extern int espserial_init(void);
366 extern int macserial_init(void);
367
368 extern int tty_paranoia_check(struct tty_struct *tty, kdev_t device,
369 const char *routine);
370 extern char *tty_name(struct tty_struct *tty, char *buf);
371 extern void tty_wait_until_sent(struct tty_struct * tty, long timeout);
372 extern int tty_check_change(struct tty_struct * tty);
373 extern void stop_tty(struct tty_struct * tty);
374 extern void start_tty(struct tty_struct * tty);
375 extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc);
376 extern int tty_register_driver(struct tty_driver *driver);
377 extern int tty_unregister_driver(struct tty_driver *driver);
378 extern void tty_register_devfs (struct tty_driver *driver, unsigned int flags,
379 unsigned minor);
380 extern void tty_unregister_devfs (struct tty_driver *driver, unsigned minor);
381 extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
382 int buflen);
383 extern void tty_write_message(struct tty_struct *tty, char *msg);
384
385 extern int is_orphaned_pgrp(int pgrp);
386 extern int is_ignored(int sig);
387 extern int tty_signal(int sig, struct tty_struct *tty);
388 extern void tty_hangup(struct tty_struct * tty);
389 extern void tty_vhangup(struct tty_struct * tty);
390 extern void tty_unhangup(struct file *filp);
391 extern int tty_hung_up_p(struct file * filp);
392 extern void do_SAK(struct tty_struct *tty);
393 extern void disassociate_ctty(int priv);
394 extern void tty_flip_buffer_push(struct tty_struct *tty);
395 extern int tty_get_baud_rate(struct tty_struct *tty);
396
397 /* n_tty.c */
398 extern struct tty_ldisc tty_ldisc_N_TTY;
399
400 /* tty_ioctl.c */
401 extern int n_tty_ioctl(struct tty_struct * tty, struct file * file,
402 unsigned int cmd, unsigned long arg);
403
404 /* serial.c */
405
406 extern void serial_console_init(void);
407
408 /* pcxx.c */
409
410 extern int pcxe_open(struct tty_struct *tty, struct file *filp);
411
412 /* printk.c */
413
414 extern void console_print(const char *);
415
416 /* vt.c */
417
418 extern int vt_ioctl(struct tty_struct *tty, struct file * file,
419 unsigned int cmd, unsigned long arg);
420
421 #endif /* __KERNEL__ */
422 #endif
423
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