1 #ifndef _LINUX_TTY_H
2 #define _LINUX_TTY_H
3
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7
8 #include <linux/termios.h>
9
10 #include <asm/system.h>
11
12 #define NR_CONSOLES 8
13 #define NR_LDISCS 16
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18
19 struct screen_info {
20 unsigned char orig_x;
21 unsigned char orig_y;
22 unsigned char unused1[2];
23 unsigned short orig_video_page;
24 unsigned char orig_video_mode;
25 unsigned char orig_video_cols;
26 unsigned short orig_video_ega_ax;
27 unsigned short orig_video_ega_bx;
28 unsigned short orig_video_ega_cx;
29 unsigned char orig_video_lines;
30 };
31
32 extern struct screen_info screen_info;
33
34 #define ORIG_X (screen_info.orig_x)
35 #define ORIG_Y (screen_info.orig_y)
36 #define ORIG_VIDEO_PAGE (screen_info.orig_video_page)
37 #define ORIG_VIDEO_MODE (screen_info.orig_video_mode)
38 #define ORIG_VIDEO_COLS (screen_info.orig_video_cols)
39 #define ORIG_VIDEO_EGA_AX (screen_info.orig_video_ega_ax)
40 #define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx)
41 #define ORIG_VIDEO_EGA_CX (screen_info.orig_video_ega_cx)
42 #define ORIG_VIDEO_LINES (screen_info.orig_video_lines)
43
44 #define VIDEO_TYPE_MDA 0x10
45 #define VIDEO_TYPE_CGA 0x11
46 #define VIDEO_TYPE_EGAM 0x20
47 #define VIDEO_TYPE_EGAC 0x21
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53
54 #define __DISABLED_CHAR '\0'
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61
62 #define TTY_BUF_SIZE 1024
63
64 struct tty_queue {
65 unsigned long data;
66 unsigned long head;
67 unsigned long tail;
68 struct wait_queue * proc_list;
69 unsigned char buf[TTY_BUF_SIZE];
70 };
71
72 struct serial_struct {
73 int type;
74 int line;
75 int port;
76 int irq;
77 int flags;
78 int xmit_fifo_size;
79 int custom_divisor;
80 int baud_base;
81 char close_delay;
82 char reserved_char[3];
83 int reserved[6];
84 };
85
86
87
88
89 #define PORT_UNKNOWN 0
90 #define PORT_8250 1
91 #define PORT_16450 2
92 #define PORT_16550 3
93 #define PORT_16550A 4
94 #define PORT_MAX 4
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98
99 #define ASYNC_HUP_NOTIFY 0x0001
100 #define ASYNC_FOURPORT 0x0002
101 #define ASYNC_SAK 0x0004
102 #define ASYNC_SKIP_TEST 0x0008
103
104 #define ASYNC_SPD_MASK 0x0030
105 #define ASYNC_SPD_HI 0x0010
106 #define ASYNC_SPD_VHI 0x0020
107 #define ASYNC_SPD_CUST 0x0030
108
109 #define ASYNC_FLAGS 0x0037
110
111
112 #define ASYNC_INITIALIZED 0x80000000
113 #define ASYNC_CALLOUT_ACTIVE 0x40000000
114 #define ASYNC_NORMAL_ACTIVE 0x20000000
115
116 #define IS_A_CONSOLE(min) (((min) & 0xC0) == 0x00)
117 #define IS_A_SERIAL(min) (((min) & 0xC0) == 0x40)
118 #define IS_A_PTY(min) ((min) & 0x80)
119 #define IS_A_PTY_MASTER(min) (((min) & 0xC0) == 0x80)
120 #define IS_A_PTY_SLAVE(min) (((min) & 0xC0) == 0xC0)
121 #define PTY_OTHER(min) ((min) ^ 0x40)
122
123 #define SL_TO_DEV(line) ((line) | 0x40)
124 #define DEV_TO_SL(min) ((min) & 0x3F)
125
126 #define INC(a) ((a) = ((a)+1) & (TTY_BUF_SIZE-1))
127 #define DEC(a) ((a) = ((a)-1) & (TTY_BUF_SIZE-1))
128 #define EMPTY(a) ((a)->head == (a)->tail)
129 #define LEFT(a) (((a)->tail-(a)->head-1)&(TTY_BUF_SIZE-1))
130 #define LAST(a) ((a)->buf[(TTY_BUF_SIZE-1)&((a)->head-1)])
131 #define FULL(a) (!LEFT(a))
132 #define CHARS(a) (((a)->head-(a)->tail)&(TTY_BUF_SIZE-1))
133
134 extern void put_tty_queue(char c, struct tty_queue * queue);
135 extern int get_tty_queue(struct tty_queue * queue);
136
137 #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
138 #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
139 #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
140 #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
141 #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
142 #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
143 #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
144 #define SUSPEND_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
145 #define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
146
147 #define _L_FLAG(tty,f) ((tty)->termios->c_lflag & f)
148 #define _I_FLAG(tty,f) ((tty)->termios->c_iflag & f)
149 #define _O_FLAG(tty,f) ((tty)->termios->c_oflag & f)
150 #define _C_FLAG(tty,f) ((tty)->termios->c_cflag & f)
151
152 #define L_CANON(tty) _L_FLAG((tty),ICANON)
153 #define L_ISIG(tty) _L_FLAG((tty),ISIG)
154 #define L_ECHO(tty) _L_FLAG((tty),ECHO)
155 #define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
156 #define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
157 #define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
158 #define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
159 #define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
160 #define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
161
162 #define I_IGNBRK(tty) _I_FLAG((tty),IGNBRK)
163 #define I_BRKINT(tty) _I_FLAG((tty),BRKINT)
164 #define I_IGNPAR(tty) _I_FLAG((tty),IGNPAR)
165 #define I_PARMRK(tty) _I_FLAG((tty),PARMRK)
166 #define I_INPCK(tty) _I_FLAG((tty),INPCK)
167 #define I_UCLC(tty) _I_FLAG((tty),IUCLC)
168 #define I_NLCR(tty) _I_FLAG((tty),INLCR)
169 #define I_CRNL(tty) _I_FLAG((tty),ICRNL)
170 #define I_NOCR(tty) _I_FLAG((tty),IGNCR)
171 #define I_IXON(tty) _I_FLAG((tty),IXON)
172 #define I_IXANY(tty) _I_FLAG((tty),IXANY)
173 #define I_STRP(tty) _I_FLAG((tty),ISTRIP)
174
175 #define O_POST(tty) _O_FLAG((tty),OPOST)
176 #define O_NLCR(tty) _O_FLAG((tty),ONLCR)
177 #define O_CRNL(tty) _O_FLAG((tty),OCRNL)
178 #define O_NLRET(tty) _O_FLAG((tty),ONLRET)
179 #define O_LCUC(tty) _O_FLAG((tty),OLCUC)
180
181 #define C_LOCAL(tty) _C_FLAG((tty),CLOCAL)
182 #define C_RTSCTS(tty) _C_FLAG((tty),CRTSCTS)
183 #define C_SPEED(tty) ((tty)->termios->c_cflag & CBAUD)
184 #define C_HUP(tty) (C_SPEED((tty)) == B0)
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199
200 struct tty_struct {
201 struct termios *termios;
202 int pgrp;
203 int session;
204 unsigned char stopped:1, status_changed:1, packet:1, lnext:1;
205 unsigned char char_error:2;
206 unsigned char ctrl_status;
207 short line;
208 int disc;
209 int flags;
210 int count;
211 struct winsize winsize;
212 int (*open)(struct tty_struct * tty, struct file * filp);
213 void (*close)(struct tty_struct * tty, struct file * filp);
214 void (*write)(struct tty_struct * tty);
215 int (*ioctl)(struct tty_struct *tty, struct file * file,
216 unsigned int cmd, unsigned int arg);
217 void (*throttle)(struct tty_struct * tty, int status);
218 void (*set_termios)(struct tty_struct *tty, struct termios * old);
219 struct tty_struct *link;
220 unsigned char *write_data_ptr;
221 int write_data_cnt;
222 void (*write_data_callback)(void * data);
223 void * write_data_arg;
224 int readq_flags[TTY_BUF_SIZE/32];
225 struct tty_queue read_q;
226 struct tty_queue write_q;
227 struct tty_queue secondary;
228 };
229
230 struct tty_ldisc {
231 int flags;
232
233
234
235 int (*open)(struct tty_struct *);
236 void (*close)(struct tty_struct *);
237 int (*read)(struct tty_struct * tty, struct file * file,
238 char * buf, int nr);
239 int (*write)(struct tty_struct * tty, struct file * file,
240 char * buf, int nr);
241 int (*ioctl)(struct tty_struct * tty, struct file * file,
242 unsigned int cmd, unsigned int arg);
243
244
245
246 void (*handler)(struct tty_struct *);
247 };
248
249 #define LDISC_FLAG_DEFINED 0x00000001
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266
267 #define TTY_THROTTLE_SQ_FULL 1
268 #define TTY_THROTTLE_SQ_AVAIL 2
269 #define TTY_THROTTLE_RQ_FULL 3
270 #define TTY_THROTTLE_RQ_AVAIL 4
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276
277 #define SQ_THRESHOLD_LW 16
278 #define SQ_THRESHOLD_HW 768
279 #define RQ_THRESHOLD_LW 16
280 #define RQ_THRESHOLD_HW 768
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290 #define TTY_WRITE_BUSY 0
291 #define TTY_READ_BUSY 1
292 #define TTY_CR_PENDING 2
293 #define TTY_SQ_THROTTLED 3
294 #define TTY_RQ_THROTTLED 4
295 #define TTY_IO_ERROR 5
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301
302 #define TTY_BREAK 1
303 #define TTY_FRAME 2
304 #define TTY_PARITY 3
305
306 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
307 #define TTY_READ_FLUSH(tty) tty_read_flush((tty))
308
309 extern void tty_write_flush(struct tty_struct *);
310 extern void tty_read_flush(struct tty_struct *);
311
312 extern struct tty_struct *tty_table[];
313 extern int tty_check_write[];
314 extern struct tty_struct * redirect;
315 extern struct tty_ldisc ldiscs[];
316 extern int fg_console;
317 extern unsigned long video_num_columns;
318 extern unsigned long video_num_lines;
319 extern struct wait_queue * keypress_wait;
320
321 #define TTY_TABLE_IDX(nr) ((nr) ? (nr) : (fg_console+1))
322 #define TTY_TABLE(nr) (tty_table[TTY_TABLE_IDX(nr)])
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329
330 #define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
331
332 extern long rs_init(long);
333 extern long lp_init(long);
334 extern long con_init(long);
335 extern long tty_init(long);
336
337 extern void flush_input(struct tty_struct * tty);
338 extern void flush_output(struct tty_struct * tty);
339 extern void wait_until_sent(struct tty_struct * tty);
340 extern void copy_to_cooked(struct tty_struct * tty);
341 extern int tty_register_ldisc(int disc, struct tty_ldisc *new);
342
343 extern int tty_ioctl(struct inode *, struct file *, unsigned int, unsigned int);
344 extern int is_orphaned_pgrp(int pgrp);
345 extern int is_ignored(int sig);
346 extern int tty_signal(int sig, struct tty_struct *tty);
347 extern int kill_pg(int pgrp, int sig, int priv);
348 extern int kill_sl(int sess, int sig, int priv);
349 extern void tty_hangup(struct tty_struct * tty);
350 extern void tty_vhangup(struct tty_struct * tty);
351 extern void tty_unhangup(struct file *filp);
352 extern int tty_hung_up_p(struct file * filp);
353 extern void do_SAK(struct tty_struct *tty);
354
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356
357 extern void rs_write(struct tty_struct * tty);
358 extern void con_write(struct tty_struct * tty);
359
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361
362 extern int rs_open(struct tty_struct * tty, struct file * filp);
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364
365
366 extern int pty_open(struct tty_struct * tty, struct file * filp);
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369
370 extern int con_open(struct tty_struct * tty, struct file * filp);
371 extern void update_screen(int new_console);
372 extern void blank_screen(void);
373 extern void unblank_screen(void);
374
375
376
377 extern int vt_ioctl(struct tty_struct *tty, struct file * file,
378 unsigned int cmd, unsigned int arg);
379
380 #endif