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https://github.com/edk2-porting/linux-next.git
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3db1ddb725
We touch the LED from both keyboard callback and direct paths. In one case we've got the lock held way up the call chain and in the other we haven't. This leads to complete insanity so fix it by giving the LED bits their own lock. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
148 lines
3.9 KiB
C
148 lines
3.9 KiB
C
#ifndef _KBD_KERN_H
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#define _KBD_KERN_H
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#include <linux/tty.h>
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#include <linux/interrupt.h>
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#include <linux/keyboard.h>
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extern struct tasklet_struct keyboard_tasklet;
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extern char *func_table[MAX_NR_FUNC];
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extern char func_buf[];
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extern char *funcbufptr;
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extern int funcbufsize, funcbufleft;
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/*
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* kbd->xxx contains the VC-local things (flag settings etc..)
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*
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* Note: externally visible are LED_SCR, LED_NUM, LED_CAP defined in kd.h
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* The code in KDGETLED / KDSETLED depends on the internal and
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* external order being the same.
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*
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* Note: lockstate is used as index in the array key_map.
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*/
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struct kbd_struct {
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unsigned char lockstate;
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/* 8 modifiers - the names do not have any meaning at all;
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they can be associated to arbitrarily chosen keys */
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#define VC_SHIFTLOCK KG_SHIFT /* shift lock mode */
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#define VC_ALTGRLOCK KG_ALTGR /* altgr lock mode */
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#define VC_CTRLLOCK KG_CTRL /* control lock mode */
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#define VC_ALTLOCK KG_ALT /* alt lock mode */
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#define VC_SHIFTLLOCK KG_SHIFTL /* shiftl lock mode */
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#define VC_SHIFTRLOCK KG_SHIFTR /* shiftr lock mode */
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#define VC_CTRLLLOCK KG_CTRLL /* ctrll lock mode */
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#define VC_CTRLRLOCK KG_CTRLR /* ctrlr lock mode */
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unsigned char slockstate; /* for `sticky' Shift, Ctrl, etc. */
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unsigned char ledmode:2; /* one 2-bit value */
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#define LED_SHOW_FLAGS 0 /* traditional state */
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#define LED_SHOW_IOCTL 1 /* only change leds upon ioctl */
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#define LED_SHOW_MEM 2 /* `heartbeat': peek into memory */
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unsigned char ledflagstate:4; /* flags, not lights */
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unsigned char default_ledflagstate:4;
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#define VC_SCROLLOCK 0 /* scroll-lock mode */
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#define VC_NUMLOCK 1 /* numeric lock mode */
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#define VC_CAPSLOCK 2 /* capslock mode */
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#define VC_KANALOCK 3 /* kanalock mode */
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unsigned char kbdmode:3; /* one 3-bit value */
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#define VC_XLATE 0 /* translate keycodes using keymap */
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#define VC_MEDIUMRAW 1 /* medium raw (keycode) mode */
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#define VC_RAW 2 /* raw (scancode) mode */
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#define VC_UNICODE 3 /* Unicode mode */
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#define VC_OFF 4 /* disabled mode */
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unsigned char modeflags:5;
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#define VC_APPLIC 0 /* application key mode */
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#define VC_CKMODE 1 /* cursor key mode */
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#define VC_REPEAT 2 /* keyboard repeat */
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#define VC_CRLF 3 /* 0 - enter sends CR, 1 - enter sends CRLF */
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#define VC_META 4 /* 0 - meta, 1 - meta=prefix with ESC */
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};
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extern int kbd_init(void);
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extern void setledstate(struct kbd_struct *kbd, unsigned int led);
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extern int do_poke_blanked_console;
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extern void (*kbd_ledfunc)(unsigned int led);
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extern int set_console(int nr);
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extern void schedule_console_callback(void);
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/* FIXME: review locking for vt.c callers */
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static inline void set_leds(void)
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{
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tasklet_schedule(&keyboard_tasklet);
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}
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static inline int vc_kbd_mode(struct kbd_struct * kbd, int flag)
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{
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return ((kbd->modeflags >> flag) & 1);
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}
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static inline int vc_kbd_led(struct kbd_struct * kbd, int flag)
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{
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return ((kbd->ledflagstate >> flag) & 1);
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}
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static inline void set_vc_kbd_mode(struct kbd_struct * kbd, int flag)
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{
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kbd->modeflags |= 1 << flag;
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}
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static inline void set_vc_kbd_led(struct kbd_struct * kbd, int flag)
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{
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kbd->ledflagstate |= 1 << flag;
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}
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static inline void clr_vc_kbd_mode(struct kbd_struct * kbd, int flag)
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{
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kbd->modeflags &= ~(1 << flag);
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}
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static inline void clr_vc_kbd_led(struct kbd_struct * kbd, int flag)
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{
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kbd->ledflagstate &= ~(1 << flag);
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}
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static inline void chg_vc_kbd_lock(struct kbd_struct * kbd, int flag)
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{
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kbd->lockstate ^= 1 << flag;
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}
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static inline void chg_vc_kbd_slock(struct kbd_struct * kbd, int flag)
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{
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kbd->slockstate ^= 1 << flag;
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}
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static inline void chg_vc_kbd_mode(struct kbd_struct * kbd, int flag)
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{
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kbd->modeflags ^= 1 << flag;
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}
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static inline void chg_vc_kbd_led(struct kbd_struct * kbd, int flag)
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{
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kbd->ledflagstate ^= 1 << flag;
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}
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#define U(x) ((x) ^ 0xf000)
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#define BRL_UC_ROW 0x2800
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/* keyboard.c */
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struct console;
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void compute_shiftstate(void);
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/* defkeymap.c */
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extern unsigned int keymap_count;
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#endif
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