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 u8 orig_x; /* 0x00 */ 61 u8 orig_y; /* 0x01 */ 62 u16 dontuse1; /* 0x02 -- EXT_MEM_K sits here */ 63 u16 orig_video_page; /* 0x04 */ 64 u8 orig_video_mode; /* 0x06 */ 65 u8 orig_video_cols; /* 0x07 */ 66 u16 unused2; /* 0x08 */ 67 u16 orig_video_ega_bx; /* 0x0a */ 68 u16 unused3; /* 0x0c */ 69 u8 orig_video_lines; /* 0x0e */ 70 u8 orig_video_isVGA; /* 0x0f */ 71 u16 orig_video_points; /* 0x10 */ 72 73 /* VESA graphic mode -- linear frame buffer */ 74 u16 lfb_width; /* 0x12 */ 75 u16 lfb_height; /* 0x14 */ 76 u16 lfb_depth; /* 0x16 */ 77 u32 lfb_base; /* 0x18 */ 78 u32 lfb_size; /* 0x1c */ 79 u16 dontuse2, dontuse3; /* 0x20 -- CL_MAGIC and CL_OFFSET here */ 80 u16 lfb_linelength; /* 0x24 */ 81 u8 red_size; /* 0x26 */ 82 u8 red_pos; /* 0x27 */ 83 u8 green_size; /* 0x28 */ 84 u8 green_pos; /* 0x29 */ 85 u8 blue_size; /* 0x2a */ 86 u8 blue_pos; /* 0x2b */ 87 u8 rsvd_size; /* 0x2c */ 88 u8 rsvd_pos; /* 0x2d */ 89 u16 vesapm_seg; /* 0x2e */ 90 u16 vesapm_off; /* 0x30 */ 91 u16 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 semaphore termios_sem; 264 struct termios *termios, *termios_locked; 265 int pgrp; 266 int session; 267 kdev_t device; 268 unsigned long flags; 269 int count; 270 struct winsize winsize; 271 unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1; 272 unsigned char low_latency:1, warned:1; 273 unsigned char ctrl_status; 274 275 struct tty_struct *link; 276 struct fasync_struct *fasync; 277 struct tty_flip_buffer flip; 278 int max_flip_cnt; 279 int alt_speed; /* For magic substitution of 38400 bps */ 280 wait_queue_head_t write_wait; 281 wait_queue_head_t read_wait; 282 struct tq_struct tq_hangup; 283 void *disc_data; 284 void *driver_data; 285 struct list_head tty_files; 286 287 #define N_TTY_BUF_SIZE 4096 288 289 /* 290 * The following is data for the N_TTY line discipline. For 291 * historical reasons, this is included in the tty structure. 292 */ 293 unsigned int column; 294 unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1; 295 unsigned char closing:1; 296 unsigned short minimum_to_wake; 297 unsigned long overrun_time; 298 int num_overrun; 299 unsigned long process_char_map[256/(8*sizeof(unsigned long))]; 300 char *read_buf; 301 int read_head; 302 int read_tail; 303 int read_cnt; 304 unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))]; 305 int canon_data; 306 unsigned long canon_head; 307 unsigned int canon_column; 308 struct semaphore atomic_read; 309 struct semaphore atomic_write; 310 spinlock_t read_lock; 311 /* If the tty has a pending do_SAK, queue it here - akpm */ 312 struct tq_struct SAK_tq; 313 }; 314 315 /* tty magic number */ 316 #define TTY_MAGIC 0x5401 317 318 /* 319 * These bits are used in the flags field of the tty structure. 320 * 321 * So that interrupts won't be able to mess up the queues, 322 * copy_to_cooked must be atomic with respect to itself, as must 323 * tty->write. Thus, you must use the inline functions set_bit() and 324 * clear_bit() to make things atomic. 325 */ 326 #define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */ 327 #define TTY_IO_ERROR 1 /* Canse an I/O error (may be no ldisc too) */ 328 #define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */ 329 #define TTY_EXCLUSIVE 3 /* Exclusive open mode */ 330 #define TTY_DEBUG 4 /* Debugging */ 331 #define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */ 332 #define TTY_PUSH 6 /* n_tty private */ 333 #define TTY_CLOSING 7 /* ->close() in progress */ 334 #define TTY_DONT_FLIP 8 /* Defer buffer flip */ 335 #define TTY_LDISC 9 /* Line discipline attached */ 336 #define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */ 337 #define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */ 338 #define TTY_PTY_LOCK 16 /* pty private */ 339 #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */ 340 #define TTY_HUPPED 18 /* Post driver->hangup() */ 341 342 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty)) 343 344 extern void tty_write_flush(struct tty_struct *); 345 346 extern struct termios tty_std_termios; 347 extern struct tty_ldisc tty_ldiscs[]; 348 extern int fg_console, last_console, want_console; 349 350 extern int kmsg_redirect; 351 352 extern void con_init(void); 353 extern void console_init(void); 354 355 extern int lp_init(void); 356 extern int pty_init(void); 357 extern void tty_init(void); 358 extern int mxser_init(void); 359 extern int moxa_init(void); 360 extern int ip2_init(void); 361 extern int pcxe_init(void); 362 extern int pc_init(void); 363 extern int vcs_init(void); 364 extern int rp_init(void); 365 extern int cy_init(void); 366 extern int stl_init(void); 367 extern int stli_init(void); 368 extern int specialix_init(void); 369 extern int espserial_init(void); 370 extern int macserial_init(void); 371 extern int a2232board_init(void); 372 373 extern int tty_paranoia_check(struct tty_struct *tty, kdev_t device, 374 const char *routine); 375 extern char *tty_name(struct tty_struct *tty, char *buf); 376 extern void tty_wait_until_sent(struct tty_struct * tty, long timeout); 377 extern int tty_check_change(struct tty_struct * tty); 378 extern void stop_tty(struct tty_struct * tty); 379 extern void start_tty(struct tty_struct * tty); 380 extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc); 381 extern int tty_register_driver(struct tty_driver *driver); 382 extern int tty_unregister_driver(struct tty_driver *driver); 383 extern void tty_register_devfs (struct tty_driver *driver, unsigned int flags, 384 unsigned minor); 385 extern void tty_unregister_devfs (struct tty_driver *driver, unsigned minor); 386 extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp, 387 int buflen); 388 extern void tty_write_message(struct tty_struct *tty, char *msg); 389 390 extern int is_orphaned_pgrp(int pgrp); 391 extern int is_ignored(int sig); 392 extern int tty_signal(int sig, struct tty_struct *tty); 393 extern void tty_hangup(struct tty_struct * tty); 394 extern void tty_vhangup(struct tty_struct * tty); 395 extern void tty_unhangup(struct file *filp); 396 extern int tty_hung_up_p(struct file * filp); 397 extern void do_SAK(struct tty_struct *tty); 398 extern void disassociate_ctty(int priv); 399 extern void tty_flip_buffer_push(struct tty_struct *tty); 400 extern int tty_get_baud_rate(struct tty_struct *tty); 401 402 extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *); 403 extern void tty_ldisc_deref(struct tty_ldisc *); 404 extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *); 405 406 extern struct tty_ldisc *tty_ldisc_get(int); 407 extern void tty_ldisc_put(int); 408 409 extern void tty_wakeup(struct tty_struct *tty); 410 extern void tty_ldisc_flush(struct tty_struct *tty); 411 412 413 /* n_tty.c */ 414 extern struct tty_ldisc tty_ldisc_N_TTY; 415 416 /* tty_ioctl.c */ 417 extern int n_tty_ioctl(struct tty_struct * tty, struct file * file, 418 unsigned int cmd, unsigned long arg); 419 420 /* serial.c */ 421 422 extern void serial_console_init(void); 423 424 /* pcxx.c */ 425 426 extern int pcxe_open(struct tty_struct *tty, struct file *filp); 427 428 /* printk.c */ 429 430 extern void console_print(const char *); 431 432 /* vt.c */ 433 434 extern int vt_ioctl(struct tty_struct *tty, struct file * file, 435 unsigned int cmd, unsigned long arg); 436 437 #endif /* __KERNEL__ */ 438 #endif 439