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'
54
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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 reserved[8];
80 };
81
82
83
84
85 #define PORT_UNKNOWN 0
86 #define PORT_8250 1
87 #define PORT_16450 2
88 #define PORT_16550 3
89 #define PORT_16550A 4
90
91
92
93
94 #define ASYNC_NOSCRATCH 0x0001
95 #define ASYNC_FOURPORT 0x0002
96 #define ASYNC_SAK 0x0004
97
98 #define ASYNC_SPD_MASK 0x0030
99 #define ASYNC_SPD_HI 0x0010
100 #define ASYNC_SPD_VHI 0x0020
101 #define ASYNC_SPD_CUST 0x0030
102
103 #define IS_A_CONSOLE(min) (((min) & 0xC0) == 0x00)
104 #define IS_A_SERIAL(min) (((min) & 0xC0) == 0x40)
105 #define IS_A_PTY(min) ((min) & 0x80)
106 #define IS_A_PTY_MASTER(min) (((min) & 0xC0) == 0x80)
107 #define IS_A_PTY_SLAVE(min) (((min) & 0xC0) == 0xC0)
108 #define PTY_OTHER(min) ((min) ^ 0x40)
109
110 #define SL_TO_DEV(line) ((line) | 0x40)
111 #define DEV_TO_SL(min) ((min) & 0x3F)
112
113 #define INC(a) ((a) = ((a)+1) & (TTY_BUF_SIZE-1))
114 #define DEC(a) ((a) = ((a)-1) & (TTY_BUF_SIZE-1))
115 #define EMPTY(a) ((a)->head == (a)->tail)
116 #define LEFT(a) (((a)->tail-(a)->head-1)&(TTY_BUF_SIZE-1))
117 #define LAST(a) ((a)->buf[(TTY_BUF_SIZE-1)&((a)->head-1)])
118 #define FULL(a) (!LEFT(a))
119 #define CHARS(a) (((a)->head-(a)->tail)&(TTY_BUF_SIZE-1))
120
121 extern void put_tty_queue(char c, struct tty_queue * queue);
122 extern int get_tty_queue(struct tty_queue * queue);
123
124 #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
125 #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
126 #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
127 #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
128 #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
129 #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
130 #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
131 #define SUSPEND_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
132
133 #define _L_FLAG(tty,f) ((tty)->termios->c_lflag & f)
134 #define _I_FLAG(tty,f) ((tty)->termios->c_iflag & f)
135 #define _O_FLAG(tty,f) ((tty)->termios->c_oflag & f)
136
137 #define L_CANON(tty) _L_FLAG((tty),ICANON)
138 #define L_ISIG(tty) _L_FLAG((tty),ISIG)
139 #define L_ECHO(tty) _L_FLAG((tty),ECHO)
140 #define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
141 #define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
142 #define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
143 #define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
144 #define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
145 #define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
146
147 #define I_UCLC(tty) _I_FLAG((tty),IUCLC)
148 #define I_NLCR(tty) _I_FLAG((tty),INLCR)
149 #define I_CRNL(tty) _I_FLAG((tty),ICRNL)
150 #define I_NOCR(tty) _I_FLAG((tty),IGNCR)
151 #define I_IXON(tty) _I_FLAG((tty),IXON)
152 #define I_IXANY(tty) _I_FLAG((tty),IXANY)
153 #define I_STRP(tty) _I_FLAG((tty),ISTRIP)
154
155 #define O_POST(tty) _O_FLAG((tty),OPOST)
156 #define O_NLCR(tty) _O_FLAG((tty),ONLCR)
157 #define O_CRNL(tty) _O_FLAG((tty),OCRNL)
158 #define O_NLRET(tty) _O_FLAG((tty),ONLRET)
159 #define O_LCUC(tty) _O_FLAG((tty),OLCUC)
160
161 #define C_SPEED(tty) ((tty)->termios->c_cflag & CBAUD)
162 #define C_HUP(tty) (C_SPEED((tty)) == B0)
163
164
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176
177
178 struct tty_struct {
179 struct termios *termios;
180 int pgrp;
181 int session;
182 unsigned char stopped:1, status_changed:1, packet:1;
183 unsigned char ctrl_status;
184 short line;
185 int flags;
186 int count;
187 struct winsize winsize;
188 int (*open)(struct tty_struct * tty, struct file * filp);
189 void (*close)(struct tty_struct * tty, struct file * filp);
190 void (*write)(struct tty_struct * tty);
191 int (*ioctl)(struct tty_struct *tty, struct file * file,
192 unsigned int cmd, unsigned int arg);
193 void (*throttle)(struct tty_struct * tty, int status);
194 struct tty_struct *link;
195 struct tty_queue read_q;
196 struct tty_queue write_q;
197 struct tty_queue secondary;
198 };
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215
216 #define TTY_THROTTLE_SQ_FULL 1
217 #define TTY_THROTTLE_SQ_AVAIL 2
218 #define TTY_THROTTLE_RQ_FULL 3
219 #define TTY_THROTTLE_RQ_AVAIL 4
220
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225
226 #define SQ_THRESHOLD_LW 16
227 #define SQ_THRESHOLD_HW 768
228 #define RQ_THRESHOLD_LW 16
229 #define RQ_THRESHOLD_HW 768
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237
238
239 #define TTY_WRITE_BUSY 0
240 #define TTY_READ_BUSY 1
241 #define TTY_CR_PENDING 2
242 #define TTY_SQ_THROTTLED 3
243 #define TTY_RQ_THROTTLED 4
244
245 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
246 #define TTY_READ_FLUSH(tty) tty_read_flush((tty))
247
248 extern void tty_write_flush(struct tty_struct *);
249 extern void tty_read_flush(struct tty_struct *);
250
251 extern struct tty_struct *tty_table[];
252 extern struct tty_struct * redirect;
253 extern int fg_console;
254 extern unsigned long video_num_columns;
255 extern unsigned long video_num_lines;
256 extern struct wait_queue * keypress_wait;
257
258 #define TTY_TABLE_IDX(nr) ((nr) ? (nr) : (fg_console+1))
259 #define TTY_TABLE(nr) (tty_table[TTY_TABLE_IDX(nr)])
260
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265
266
267 #define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
268
269 extern long rs_init(long);
270 extern long lp_init(long);
271 extern long con_init(long);
272 extern long tty_init(long);
273
274 extern void flush_input(struct tty_struct * tty);
275 extern void flush_output(struct tty_struct * tty);
276 extern void wait_until_sent(struct tty_struct * tty);
277 extern void copy_to_cooked(struct tty_struct * tty);
278
279 extern int tty_ioctl(struct inode *, struct file *, unsigned int, unsigned int);
280 extern int is_orphaned_pgrp(int pgrp);
281 extern int is_ignored(int sig);
282 extern int tty_signal(int sig, struct tty_struct *tty);
283 extern int kill_pg(int pgrp, int sig, int priv);
284 extern void do_SAK(struct tty_struct *tty);
285
286
287
288 extern void rs_write(struct tty_struct * tty);
289 extern void con_write(struct tty_struct * tty);
290
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292
293 extern int rs_open(struct tty_struct * tty, struct file * filp);
294 extern void change_speed(unsigned int line);
295
296
297
298 extern int pty_open(struct tty_struct * tty, struct file * filp);
299
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301
302 extern int con_open(struct tty_struct * tty, struct file * filp);
303 extern void update_screen(int new_console);
304 extern void blank_screen(void);
305 extern void unblank_screen(void);
306
307
308
309 extern int vt_ioctl(struct tty_struct *tty, struct file * file,
310 unsigned int cmd, unsigned int arg);
311
312 #endif