include/linux/kbd_kern.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _KBD_KERN_H
   3 #define _KBD_KERN_H
   4
   5 #include <linux/tty.h>
   6 #include <linux/interrupt.h>
   7 #include <linux/keyboard.h>
   8
   9 extern struct tasklet_struct keyboard_tasklet;
  10
  11 extern char *func_table[MAX_NR_FUNC];
  12 extern char func_buf[];
  13 extern char *funcbufptr;
  14 extern int funcbufsize, funcbufleft;
  15
  16 /*
  17  * kbd->xxx contains the VC-local things (flag settings etc..)
  18  *
  19  * Note: externally visible are LED_SCR, LED_NUM, LED_CAP defined in kd.h
  20  *       The code in KDGETLED / KDSETLED depends on the internal and
  21  *       external order being the same.
  22  *
  23  * Note: lockstate is used as index in the array key_map.
  24  */
  25 struct kbd_struct {
  26
  27         unsigned char lockstate;
  28 /* 8 modifiers - the names do not have any meaning at all;
  29    they can be associated to arbitrarily chosen keys */
  30 #define VC_SHIFTLOCK    KG_SHIFT        /* shift lock mode */
  31 #define VC_ALTGRLOCK    KG_ALTGR        /* altgr lock mode */
  32 #define VC_CTRLLOCK     KG_CTRL         /* control lock mode */
  33 #define VC_ALTLOCK      KG_ALT          /* alt lock mode */
  34 #define VC_SHIFTLLOCK   KG_SHIFTL       /* shiftl lock mode */
  35 #define VC_SHIFTRLOCK   KG_SHIFTR       /* shiftr lock mode */
  36 #define VC_CTRLLLOCK    KG_CTRLL        /* ctrll lock mode */
  37 #define VC_CTRLRLOCK    KG_CTRLR        /* ctrlr lock mode */
  38         unsigned char slockstate;       /* for `sticky' Shift, Ctrl, etc. */
  39
  40         unsigned char ledmode:1;
  41 #define LED_SHOW_FLAGS 0        /* traditional state */
  42 #define LED_SHOW_IOCTL 1        /* only change leds upon ioctl */
  43
  44         unsigned char ledflagstate:4;   /* flags, not lights */
  45         unsigned char default_ledflagstate:4;
  46 #define VC_SCROLLOCK    0       /* scroll-lock mode */
  47 #define VC_NUMLOCK      1       /* numeric lock mode */
  48 #define VC_CAPSLOCK     2       /* capslock mode */
  49 #define VC_KANALOCK     3       /* kanalock mode */
  50
  51         unsigned char kbdmode:3;        /* one 3-bit value */
  52 #define VC_XLATE        0       /* translate keycodes using keymap */
  53 #define VC_MEDIUMRAW    1       /* medium raw (keycode) mode */
  54 #define VC_RAW          2       /* raw (scancode) mode */
  55 #define VC_UNICODE      3       /* Unicode mode */
  56 #define VC_OFF          4       /* disabled mode */
  57
  58         unsigned char modeflags:5;
  59 #define VC_APPLIC       0       /* application key mode */
  60 #define VC_CKMODE       1       /* cursor key mode */
  61 #define VC_REPEAT       2       /* keyboard repeat */
  62 #define VC_CRLF         3       /* 0 - enter sends CR, 1 - enter sends CRLF */
  63 #define VC_META         4       /* 0 - meta, 1 - meta=prefix with ESC */
  64 };
  65
  66 extern int kbd_init(void);
  67
  68 extern void setledstate(struct kbd_struct *kbd, unsigned int led);
  69
  70 extern int do_poke_blanked_console;
  71
  72 extern void (*kbd_ledfunc)(unsigned int led);
  73
  74 extern int set_console(int nr);
  75 extern void schedule_console_callback(void);
  76
  77 /* FIXME: review locking for vt.c callers */
  78 static inline void set_leds(void)
  79 {
  80         tasklet_schedule(&keyboard_tasklet);
  81 }
  82
  83 static inline int vc_kbd_mode(struct kbd_struct * kbd, int flag)
  84 {
  85         return ((kbd->modeflags >> flag) & 1);
  86 }
  87
  88 static inline int vc_kbd_led(struct kbd_struct * kbd, int flag)
  89 {
  90         return ((kbd->ledflagstate >> flag) & 1);
  91 }
  92
  93 static inline void set_vc_kbd_mode(struct kbd_struct * kbd, int flag)
  94 {
  95         kbd->modeflags |= 1 << flag;
  96 }
  97
  98 static inline void set_vc_kbd_led(struct kbd_struct * kbd, int flag)
  99 {
 100         kbd->ledflagstate |= 1 << flag;
 101 }
 102
 103 static inline void clr_vc_kbd_mode(struct kbd_struct * kbd, int flag)
 104 {
 105         kbd->modeflags &= ~(1 << flag);
 106 }
 107
 108 static inline void clr_vc_kbd_led(struct kbd_struct * kbd, int flag)
 109 {
 110         kbd->ledflagstate &= ~(1 << flag);
 111 }
 112
 113 static inline void chg_vc_kbd_lock(struct kbd_struct * kbd, int flag)
 114 {
 115         kbd->lockstate ^= 1 << flag;
 116 }
 117
 118 static inline void chg_vc_kbd_slock(struct kbd_struct * kbd, int flag)
 119 {
 120         kbd->slockstate ^= 1 << flag;
 121 }
 122
 123 static inline void chg_vc_kbd_mode(struct kbd_struct * kbd, int flag)
 124 {
 125         kbd->modeflags ^= 1 << flag;
 126 }
 127
 128 static inline void chg_vc_kbd_led(struct kbd_struct * kbd, int flag)
 129 {
 130         kbd->ledflagstate ^= 1 << flag;
 131 }
 132
 133 #define U(x) ((x) ^ 0xf000)
 134
 135 #define BRL_UC_ROW 0x2800
 136
 137 /* keyboard.c */
 138
 139 struct console;
 140
 141 void compute_shiftstate(void);
 142
 143 /* defkeymap.c */
 144
 145 extern unsigned int keymap_count;
 146
 147 #endif