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
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16
17
18 struct screen_info {
19 unsigned char orig_x;
20 unsigned char orig_y;
21 unsigned char unused1[2];
22 unsigned short orig_video_page;
23 unsigned char orig_video_mode;
24 unsigned char orig_video_cols;
25 unsigned short orig_video_ega_ax;
26 unsigned short orig_video_ega_bx;
27 unsigned short orig_video_ega_cx;
28 unsigned char orig_video_lines;
29 };
30
31 extern struct screen_info screen_info;
32
33 #define ORIG_X (screen_info.orig_x)
34 #define ORIG_Y (screen_info.orig_y)
35 #define ORIG_VIDEO_PAGE (screen_info.orig_video_page)
36 #define ORIG_VIDEO_MODE (screen_info.orig_video_mode)
37 #define ORIG_VIDEO_COLS (screen_info.orig_video_cols)
38 #define ORIG_VIDEO_EGA_AX (screen_info.orig_video_ega_ax)
39 #define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx)
40 #define ORIG_VIDEO_EGA_CX (screen_info.orig_video_ega_cx)
41 #define ORIG_VIDEO_LINES (screen_info.orig_video_lines)
42
43 #define VIDEO_TYPE_MDA 0x10
44 #define VIDEO_TYPE_CGA 0x11
45 #define VIDEO_TYPE_EGAM 0x20
46 #define VIDEO_TYPE_EGAC 0x21
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51
52
53 #define __DISABLED_CHAR '\0'
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60
61 #define TTY_BUF_SIZE 1024
62
63 struct tty_queue {
64 unsigned long data;
65 unsigned long head;
66 unsigned long tail;
67 struct wait_queue * proc_list;
68 unsigned char buf[TTY_BUF_SIZE];
69 };
70
71 struct serial_struct {
72 int type;
73 int line;
74 int port;
75 int irq;
76 int flags;
77 int xmit_fifo_size;
78 int custom_divisor;
79 int baud_base;
80 int reserved[7];
81 };
82
83
84
85
86 #define PORT_UNKNOWN 0
87 #define PORT_8250 1
88 #define PORT_16450 2
89 #define PORT_16550 3
90 #define PORT_16550A 4
91 #define PORT_MAX 4
92
93
94
95
96 #define ASYNC_FOURPORT 0x0002
97 #define ASYNC_SAK 0x0004
98
99 #define ASYNC_SPD_MASK 0x0030
100 #define ASYNC_SPD_HI 0x0010
101 #define ASYNC_SPD_VHI 0x0020
102 #define ASYNC_SPD_CUST 0x0030
103
104 #define ASYNC_FLAGS 0x0036
105
106
107 #define ASYNC_NO_IRQ 0x80000000
108
109 #define IS_A_CONSOLE(min) (((min) & 0xC0) == 0x00)
110 #define IS_A_SERIAL(min) (((min) & 0xC0) == 0x40)
111 #define IS_A_PTY(min) ((min) & 0x80)
112 #define IS_A_PTY_MASTER(min) (((min) & 0xC0) == 0x80)
113 #define IS_A_PTY_SLAVE(min) (((min) & 0xC0) == 0xC0)
114 #define PTY_OTHER(min) ((min) ^ 0x40)
115
116 #define SL_TO_DEV(line) ((line) | 0x40)
117 #define DEV_TO_SL(min) ((min) & 0x3F)
118
119 #define INC(a) ((a) = ((a)+1) & (TTY_BUF_SIZE-1))
120 #define DEC(a) ((a) = ((a)-1) & (TTY_BUF_SIZE-1))
121 #define EMPTY(a) ((a)->head == (a)->tail)
122 #define LEFT(a) (((a)->tail-(a)->head-1)&(TTY_BUF_SIZE-1))
123 #define LAST(a) ((a)->buf[(TTY_BUF_SIZE-1)&((a)->head-1)])
124 #define FULL(a) (!LEFT(a))
125 #define CHARS(a) (((a)->head-(a)->tail)&(TTY_BUF_SIZE-1))
126
127 extern void put_tty_queue(char c, struct tty_queue * queue);
128 extern int get_tty_queue(struct tty_queue * queue);
129
130 #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
131 #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
132 #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
133 #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
134 #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
135 #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
136 #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
137 #define SUSPEND_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
138
139 #define _L_FLAG(tty,f) ((tty)->termios->c_lflag & f)
140 #define _I_FLAG(tty,f) ((tty)->termios->c_iflag & f)
141 #define _O_FLAG(tty,f) ((tty)->termios->c_oflag & f)
142
143 #define L_CANON(tty) _L_FLAG((tty),ICANON)
144 #define L_ISIG(tty) _L_FLAG((tty),ISIG)
145 #define L_ECHO(tty) _L_FLAG((tty),ECHO)
146 #define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
147 #define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
148 #define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
149 #define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
150 #define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
151 #define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
152
153 #define I_UCLC(tty) _I_FLAG((tty),IUCLC)
154 #define I_NLCR(tty) _I_FLAG((tty),INLCR)
155 #define I_CRNL(tty) _I_FLAG((tty),ICRNL)
156 #define I_NOCR(tty) _I_FLAG((tty),IGNCR)
157 #define I_IXON(tty) _I_FLAG((tty),IXON)
158 #define I_IXANY(tty) _I_FLAG((tty),IXANY)
159 #define I_STRP(tty) _I_FLAG((tty),ISTRIP)
160
161 #define O_POST(tty) _O_FLAG((tty),OPOST)
162 #define O_NLCR(tty) _O_FLAG((tty),ONLCR)
163 #define O_CRNL(tty) _O_FLAG((tty),OCRNL)
164 #define O_NLRET(tty) _O_FLAG((tty),ONLRET)
165 #define O_LCUC(tty) _O_FLAG((tty),OLCUC)
166
167 #define C_SPEED(tty) ((tty)->termios->c_cflag & CBAUD)
168 #define C_HUP(tty) (C_SPEED((tty)) == B0)
169
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182
183
184 struct tty_struct {
185 struct termios *termios;
186 int pgrp;
187 int session;
188 unsigned char stopped:1, status_changed:1, packet:1;
189 unsigned char ctrl_status;
190 short line;
191 int flags;
192 int count;
193 struct winsize winsize;
194 int (*open)(struct tty_struct * tty, struct file * filp);
195 void (*close)(struct tty_struct * tty, struct file * filp);
196 void (*write)(struct tty_struct * tty);
197 int (*ioctl)(struct tty_struct *tty, struct file * file,
198 unsigned int cmd, unsigned int arg);
199 void (*throttle)(struct tty_struct * tty, int status);
200 struct tty_struct *link;
201 struct tty_queue read_q;
202 struct tty_queue write_q;
203 struct tty_queue secondary;
204 };
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221
222 #define TTY_THROTTLE_SQ_FULL 1
223 #define TTY_THROTTLE_SQ_AVAIL 2
224 #define TTY_THROTTLE_RQ_FULL 3
225 #define TTY_THROTTLE_RQ_AVAIL 4
226
227
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230
231
232 #define SQ_THRESHOLD_LW 16
233 #define SQ_THRESHOLD_HW 768
234 #define RQ_THRESHOLD_LW 16
235 #define RQ_THRESHOLD_HW 768
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244
245 #define TTY_WRITE_BUSY 0
246 #define TTY_READ_BUSY 1
247 #define TTY_CR_PENDING 2
248 #define TTY_SQ_THROTTLED 3
249 #define TTY_RQ_THROTTLED 4
250 #define TTY_IO_ERROR 5
251
252 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
253 #define TTY_READ_FLUSH(tty) tty_read_flush((tty))
254
255 extern void tty_write_flush(struct tty_struct *);
256 extern void tty_read_flush(struct tty_struct *);
257
258 extern struct tty_struct *tty_table[];
259 extern struct tty_struct * redirect;
260 extern int fg_console;
261 extern unsigned long video_num_columns;
262 extern unsigned long video_num_lines;
263 extern struct wait_queue * keypress_wait;
264
265 #define TTY_TABLE_IDX(nr) ((nr) ? (nr) : (fg_console+1))
266 #define TTY_TABLE(nr) (tty_table[TTY_TABLE_IDX(nr)])
267
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273
274 #define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
275
276 extern long rs_init(long);
277 extern long lp_init(long);
278 extern long con_init(long);
279 extern long tty_init(long);
280
281 extern void flush_input(struct tty_struct * tty);
282 extern void flush_output(struct tty_struct * tty);
283 extern void wait_until_sent(struct tty_struct * tty);
284 extern void copy_to_cooked(struct tty_struct * tty);
285
286 extern int tty_ioctl(struct inode *, struct file *, unsigned int, unsigned int);
287 extern int is_orphaned_pgrp(int pgrp);
288 extern int is_ignored(int sig);
289 extern int tty_signal(int sig, struct tty_struct *tty);
290 extern int kill_pg(int pgrp, int sig, int priv);
291 extern int kill_sl(int sess, int sig, int priv);
292 extern void tty_hangup(struct tty_struct * tty);
293 extern void do_SAK(struct tty_struct *tty);
294
295
296
297 extern void rs_write(struct tty_struct * tty);
298 extern void con_write(struct tty_struct * tty);
299
300
301
302 extern int rs_open(struct tty_struct * tty, struct file * filp);
303 extern void change_speed(unsigned int line);
304
305
306
307 extern int pty_open(struct tty_struct * tty, struct file * filp);
308
309
310
311 extern int con_open(struct tty_struct * tty, struct file * filp);
312 extern void update_screen(int new_console);
313 extern void blank_screen(void);
314 extern void unblank_screen(void);
315
316
317
318 extern int vt_ioctl(struct tty_struct *tty, struct file * file,
319 unsigned int cmd, unsigned int arg);
320
321 #endif