console.h 4.9 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152
  1. /*
  2. * linux/include/linux/console.h
  3. *
  4. * Copyright (C) 1993 Hamish Macdonald
  5. *
  6. * This file is subject to the terms and conditions of the GNU General Public
  7. * License. See the file COPYING in the main directory of this archive
  8. * for more details.
  9. *
  10. * Changed:
  11. * 10-Mar-94: Arno Griffioen: Conversion for vt100 emulator port from PC LINUX
  12. */
  13. #ifndef _LINUX_CONSOLE_H_
  14. #define _LINUX_CONSOLE_H_ 1
  15. #include <linux/types.h>
  16. #include <linux/spinlock.h>
  17. struct vc_data;
  18. struct console_font_op;
  19. struct console_font;
  20. struct module;
  21. struct tty_struct;
  22. /*
  23. * this is what the terminal answers to a ESC-Z or csi0c query.
  24. */
  25. #define VT100ID "\033[?1;2c"
  26. #define VT102ID "\033[?6c"
  27. struct consw {
  28. struct module *owner;
  29. const char *(*con_startup)(void);
  30. void (*con_init)(struct vc_data *, int);
  31. void (*con_deinit)(struct vc_data *);
  32. void (*con_clear)(struct vc_data *, int, int, int, int);
  33. void (*con_putc)(struct vc_data *, int, int, int);
  34. void (*con_putcs)(struct vc_data *, const unsigned short *, int, int, int);
  35. void (*con_cursor)(struct vc_data *, int);
  36. int (*con_scroll)(struct vc_data *, int, int, int, int);
  37. void (*con_bmove)(struct vc_data *, int, int, int, int, int, int);
  38. int (*con_switch)(struct vc_data *);
  39. int (*con_blank)(struct vc_data *, int, int);
  40. int (*con_font_set)(struct vc_data *, struct console_font *, unsigned);
  41. int (*con_font_get)(struct vc_data *, struct console_font *);
  42. int (*con_font_default)(struct vc_data *, struct console_font *, char *);
  43. int (*con_font_copy)(struct vc_data *, int);
  44. int (*con_resize)(struct vc_data *, unsigned int, unsigned int);
  45. int (*con_set_palette)(struct vc_data *, unsigned char *);
  46. int (*con_scrolldelta)(struct vc_data *, int);
  47. int (*con_set_origin)(struct vc_data *);
  48. void (*con_save_screen)(struct vc_data *);
  49. u8 (*con_build_attr)(struct vc_data *, u8, u8, u8, u8, u8);
  50. void (*con_invert_region)(struct vc_data *, u16 *, int);
  51. u16 *(*con_screen_pos)(struct vc_data *, int);
  52. unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *);
  53. };
  54. extern const struct consw *conswitchp;
  55. extern const struct consw dummy_con; /* dummy console buffer */
  56. extern const struct consw vga_con; /* VGA text console */
  57. extern const struct consw newport_con; /* SGI Newport console */
  58. extern const struct consw prom_con; /* SPARC PROM console */
  59. int con_is_bound(const struct consw *csw);
  60. int register_con_driver(const struct consw *csw, int first, int last);
  61. int unregister_con_driver(const struct consw *csw);
  62. int take_over_console(const struct consw *sw, int first, int last, int deflt);
  63. void give_up_console(const struct consw *sw);
  64. /* scroll */
  65. #define SM_UP (1)
  66. #define SM_DOWN (2)
  67. /* cursor */
  68. #define CM_DRAW (1)
  69. #define CM_ERASE (2)
  70. #define CM_MOVE (3)
  71. /*
  72. * The interface for a console, or any other device that wants to capture
  73. * console messages (printer driver?)
  74. *
  75. * If a console driver is marked CON_BOOT then it will be auto-unregistered
  76. * when the first real console is registered. This is for early-printk drivers.
  77. */
  78. #define CON_PRINTBUFFER (1)
  79. #define CON_CONSDEV (2) /* Last on the command line */
  80. #define CON_ENABLED (4)
  81. #define CON_BOOT (8)
  82. #define CON_ANYTIME (16) /* Safe to call when cpu is offline */
  83. struct console
  84. {
  85. char name[8];
  86. void (*write)(struct console *, const char *, unsigned);
  87. int (*read)(struct console *, char *, unsigned);
  88. struct tty_driver *(*device)(struct console *, int *);
  89. void (*unblank)(void);
  90. int (*setup)(struct console *, char *);
  91. short flags;
  92. short index;
  93. int cflag;
  94. void *data;
  95. struct console *next;
  96. };
  97. extern int add_preferred_console(char *name, int idx, char *options);
  98. extern void register_console(struct console *);
  99. extern int unregister_console(struct console *);
  100. extern struct console *console_drivers;
  101. extern void acquire_console_sem(void);
  102. extern int try_acquire_console_sem(void);
  103. extern void release_console_sem(void);
  104. extern void console_conditional_schedule(void);
  105. extern void console_unblank(void);
  106. extern struct tty_driver *console_device(int *);
  107. extern void console_stop(struct console *);
  108. extern void console_start(struct console *);
  109. extern int is_console_locked(void);
  110. #ifndef CONFIG_DISABLE_CONSOLE_SUSPEND
  111. /* Suspend and resume console messages over PM events */
  112. extern void suspend_console(void);
  113. extern void resume_console(void);
  114. #else
  115. static inline void suspend_console(void) {}
  116. static inline void resume_console(void) {}
  117. #endif /* CONFIG_DISABLE_CONSOLE_SUSPEND */
  118. int mda_console_init(void);
  119. void prom_con_init(void);
  120. void vcs_make_sysfs(struct tty_struct *tty);
  121. void vcs_remove_sysfs(struct tty_struct *tty);
  122. /* Some debug stub to catch some of the obvious races in the VT code */
  123. #if 1
  124. #define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)
  125. #else
  126. #define WARN_CONSOLE_UNLOCKED()
  127. #endif
  128. /* VESA Blanking Levels */
  129. #define VESA_NO_BLANKING 0
  130. #define VESA_VSYNC_SUSPEND 1
  131. #define VESA_HSYNC_SUSPEND 2
  132. #define VESA_POWERDOWN 3
  133. #endif /* _LINUX_CONSOLE_H */