patch-1.3.94 linux/drivers/char/keyb_m68k.c

• Lines: 868
• Date: Fri Apr 5 17:16:48 1996
• Orig file: v1.3.93/linux/drivers/char/keyb_m68k.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.93/linux/drivers/char/keyb_m68k.c linux/drivers/char/keyb_m68k.c
@@ -0,0 +1,867 @@
+/*
+ * linux/drivers/char/keyboard.c
+ *
+ * Keyboard driver for Linux v0.99 using Latin-1.
+ *
+ * Written for linux by Johan Myreen as a translation from
+ * the assembly version by Linus (with diacriticals added)
+ *
+ * Some additional features added by Christoph Niemann (ChN), March 1993
+ *
+ * Loadable keymaps by Risto Kankkunen, May 1993
+ *
+ * Diacriticals redone & other small changes, aeb@cwi.nl, June 1993
+ * Added decr/incr_console, dynamic keymaps, Unicode support,
+ * dynamic function/string keys, led setting,  Sept 1994
+ * `Sticky' modifier keys, 951006.
+ * 
+ */
+
+/*
+ * modified to provide 'generic' keyboard support by Hamish Macdonald
+ */
+
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/mm.h>
+#include <linux/random.h>
+
+#include <asm/bitops.h>
+#include <asm/machdep.h>
+
+#include "kbd_kern.h"
+#include "diacr.h"
+#include "vt_kern.h"
+
+#define SIZE(x) (sizeof(x)/sizeof((x)[0]))
+
+#define KBD_REPORT_ERR
+#define KBD_REPORT_UNKN
+/* #define KBD_IS_FOCUS_9000 */
+
+#ifndef KBD_DEFMODE
+#define KBD_DEFMODE ((1 << VC_REPEAT) | (1 << VC_META))
+#endif
+
+#ifndef KBD_DEFLEDS
+/*
+ * Some laptops take the 789uiojklm,. keys as number pad when NumLock
+ * is on. This seems a good reason to start with NumLock off.
+ */
+#define KBD_DEFLEDS 0
+#endif
+
+#ifndef KBD_DEFLOCK
+#define KBD_DEFLOCK 0
+#endif
+
+/*
+ * The default IO slowdown is doing 'inb()'s from 0x61, which should be
+ * safe. But as that is the keyboard controller chip address, we do our
+ * slowdowns here by doing short jumps: the keyboard controller should
+ * be able to keep up
+ */
+#define REALLY_SLOW_IO
+#define SLOW_IO_BY_JUMPING
+#include <asm/io.h>
+#include <asm/system.h>
+
+extern void poke_blanked_console(void);
+extern void ctrl_alt_del(void);
+extern void reset_vc(unsigned int new_console);
+extern void scrollback(int);
+extern void scrollfront(int);
+extern int vc_cons_allocated(unsigned int);
+
+unsigned char kbd_read_mask = 0x01;	/* modified by psaux.c */
+
+/*
+ * global state includes the following, and various static variables
+ * in this module: prev_scancode, shift_state, diacr, npadch, dead_key_next.
+ * (last_console is now a global variable)
+ */
+
+/* shift state counters.. */
+static unsigned char k_down[NR_SHIFT] = {0, };
+/* keyboard key bitmap */
+#define BITS_PER_LONG (8*sizeof(unsigned long))
+static unsigned long key_down[256/BITS_PER_LONG] = { 0, };
+
+static int dead_key_next = 0;
+/* 
+ * In order to retrieve the shift_state (for the mouse server), either
+ * the variable must be global, or a new procedure must be created to 
+ * return the value. I chose the former way.
+ */
+/*static*/ int shift_state = 0;
+static int npadch = -1;			/* -1 or number assembled on pad */
+static unsigned char diacr = 0;
+static char rep = 0;			/* flag telling character repeat */
+struct kbd_struct kbd_table[MAX_NR_CONSOLES];
+static struct tty_struct **ttytab;
+static struct kbd_struct *kbd = kbd_table;
+static struct tty_struct *tty = NULL;
+
+extern void compute_shiftstate(void);
+
+typedef void (*k_hand)(unsigned char value, char up_flag);
+typedef void (k_handfn)(unsigned char value, char up_flag);
+
+static k_handfn
+        do_self, do_fn, do_spec, do_pad, do_dead, do_cons, do_cur, do_shift,
+	do_meta, do_ascii, do_lock, do_lowercase, do_slock, do_ignore;
+
+static k_hand key_handler[16] = {
+	do_self, do_fn, do_spec, do_pad, do_dead, do_cons, do_cur, do_shift,
+	do_meta, do_ascii, do_lock, do_lowercase, do_slock,
+	do_ignore, do_ignore, do_ignore
+};
+
+typedef void (*void_fnp)(void);
+typedef void (void_fn)(void);
+
+static void_fn do_null, enter, show_ptregs, send_intr, lastcons, caps_toggle,
+	num, hold, scroll_forw, scroll_back, boot_it, caps_on, compose,
+	SAK, decr_console, incr_console, spawn_console, bare_num;
+
+static void_fnp spec_fn_table[] = {
+	do_null,	enter,		show_ptregs,	show_mem,
+	show_state,	send_intr,	lastcons,	caps_toggle,
+	num,		hold,		scroll_forw,	scroll_back,
+	boot_it,	caps_on,	compose,	SAK,
+	decr_console,	incr_console,	spawn_console,	bare_num
+};
+
+/* maximum values each key_handler can handle */
+const int max_vals[] = {
+	255, SIZE(func_table) - 1, SIZE(spec_fn_table) - 1, NR_PAD - 1,
+	NR_DEAD - 1, 255, 3, NR_SHIFT - 1,
+	255, NR_ASCII - 1, NR_LOCK - 1, 255,
+	NR_LOCK - 1
+};
+
+const int NR_TYPES = SIZE(max_vals);
+
+static void put_queue(int);
+static unsigned char handle_diacr(unsigned char);
+
+/*
+ * Many other routines do put_queue, but I think either
+ * they produce ASCII, or they produce some user-assigned
+ * string, and in both cases we might assume that it is
+ * in utf-8 already.
+ */
+void to_utf8(ushort c) {
+    if (c < 0x80)
+	put_queue(c);			/*  0*******  */
+    else if (c < 0x800) {
+	put_queue(0xc0 | (c >> 6)); 	/*  110***** 10******  */
+	put_queue(0x80 | (c & 0x3f));
+    } else {
+	put_queue(0xe0 | (c >> 12)); 	/*  1110**** 10****** 10******  */
+	put_queue(0x80 | ((c >> 6) & 0x3f));
+	put_queue(0x80 | (c & 0x3f));
+    }
+    /* UTF-8 is defined for words of up to 31 bits,
+       but we need only 16 bits here */
+}
+
+void process_keycode (int keycode)
+{
+	char up_flag;		                 /* 0 or 0200 */
+	char raw_mode;
+
+	do_poke_blanked_console = 1;
+	mark_bh(KEYBOARD_BH);
+	add_keyboard_randomness(keycode);
+
+	tty = ttytab[fg_console];
+ 	kbd = kbd_table + fg_console;
+	if ((raw_mode = (kbd->kbdmode == VC_RAW))) {
+ 		put_queue(keycode);
+		/* we do not return yet, because we want to maintain
+		   the key_down array, so that we have the correct
+		   values when finishing RAW mode or when changing VT's */
+ 	}
+
+	/*
+	 * At this point the variable `keycode' contains the keycode.
+	 * Note: the keycode must not be 0.
+	 * We keep track of the up/down status of the key, and
+	 * return the keycode if in MEDIUMRAW mode.
+	 */
+
+	up_flag = (keycode & 0200);
+        keycode &= 0x7f;
+	if (up_flag) {
+		rep = 0;
+ 		if(!clear_bit(keycode, key_down)) {
+		    /* unexpected, but this can happen:
+		       maybe this was a key release for a FOCUS 9000
+		       PF key; if we want to see it, we have to clear
+		       up_flag */
+#ifndef __mc68000__
+		    if (keycode >= SC_LIM || keycode == 85)
+		      up_flag = 0;
+#endif
+		}
+	} else
+ 		rep = set_bit(keycode, key_down);
+
+	if (raw_mode)
+	        return;
+
+	if (kbd->kbdmode == VC_MEDIUMRAW) {
+		/* soon keycodes will require more than one byte */
+ 		put_queue(keycode + up_flag);
+		return;
+	}
+
+ 	/*
+	 * Small change in philosophy: earlier we defined repetition by
+	 *	 rep = keycode == prev_keycode;
+	 *	 prev_keycode = keycode;
+	 * but now by the fact that the depressed key was down already.
+	 * Does this ever make a difference? Yes.
+	 */
+
+	/*
+ 	 *  Repeat a key only if the input buffers are empty or the
+ 	 *  characters get echoed locally. This makes key repeat usable
+ 	 *  with slow applications and under heavy loads.
+	 */
+	if (!rep ||
+	    (vc_kbd_mode(kbd,VC_REPEAT) && tty &&
+	     (L_ECHO(tty) || (tty->driver.chars_in_buffer(tty) == 0)))) {
+		u_short keysym;
+		u_char type;
+
+		/* the XOR below used to be an OR */
+		int shift_final = shift_state ^ kbd->lockstate ^ kbd->slockstate;
+		ushort *key_map = key_maps[shift_final];
+
+		if (key_map != NULL) {
+			keysym = key_map[keycode];
+			type = KTYP(keysym);
+
+			if (type >= 0xf0) {
+			    type -= 0xf0;
+			    if (type == KT_LETTER) {
+				type = KT_LATIN;
+				if (vc_kbd_led(kbd, VC_CAPSLOCK)) {
+				    key_map = key_maps[shift_final ^ (1<<KG_SHIFT)];
+				    if (key_map)
+				      keysym = key_map[keycode];
+				}
+			    }
+			    (*key_handler[type])(keysym & 0xff, up_flag);
+			    if (type != KT_SLOCK)
+			      kbd->slockstate = 0;
+			} else {
+			    /* maybe only if (kbd->kbdmode == VC_UNICODE) ? */
+			    if (!up_flag)
+			      to_utf8(keysym);
+			}
+		} else {
+			/* maybe beep? */
+			/* we have at least to update shift_state */
+#if 1			/* how? two almost equivalent choices follow */
+			compute_shiftstate();
+#else
+			keysym = U(plain_map[keycode]);
+			type = KTYP(keysym);
+			if (type == KT_SHIFT)
+			  (*key_handler[type])(keysym & 0xff, up_flag);
+#endif
+		}
+        }
+}
+
+static void put_queue(int ch)
+{
+	wake_up(&keypress_wait);
+	if (tty) {
+		tty_insert_flip_char(tty, ch, 0);
+		tty_schedule_flip(tty);
+	}
+}
+
+static void puts_queue(char *cp)
+{
+	wake_up(&keypress_wait);
+	if (!tty)
+		return;
+
+	while (*cp) {
+		tty_insert_flip_char(tty, *cp, 0);
+		cp++;
+	}
+	tty_schedule_flip(tty);
+}
+
+static void applkey(int key, char mode)
+{
+	static char buf[] = { 0x1b, 'O', 0x00, 0x00 };
+
+	buf[1] = (mode ? 'O' : '[');
+	buf[2] = key;
+	puts_queue(buf);
+}
+
+static void enter(void)
+{
+	put_queue(13);
+	if (vc_kbd_mode(kbd,VC_CRLF))
+		put_queue(10);
+}
+
+static void caps_toggle(void)
+{
+	if (rep)
+		return;
+	chg_vc_kbd_led(kbd, VC_CAPSLOCK);
+}
+
+static void caps_on(void)
+{
+	if (rep)
+		return;
+	set_vc_kbd_led(kbd, VC_CAPSLOCK);
+}
+
+struct pt_regs *pt_regs;
+
+static void show_ptregs(void)
+{
+	if (pt_regs)
+		show_regs(pt_regs);
+	return;
+}
+
+static void hold(void)
+{
+	if (rep || !tty)
+		return;
+
+	/*
+	 * Note: SCROLLOCK will be set (cleared) by stop_tty (start_tty);
+	 * these routines are also activated by ^S/^Q.
+	 * (And SCROLLOCK can also be set by the ioctl KDSKBLED.)
+	 */
+	if (tty->stopped)
+		start_tty(tty);
+	else
+		stop_tty(tty);
+}
+
+static void num(void)
+{
+	if (vc_kbd_mode(kbd,VC_APPLIC))
+		applkey('P', 1);
+	else
+		bare_num();
+}
+
+/*
+ * Bind this to Shift-NumLock if you work in application keypad mode
+ * but want to be able to change the NumLock flag.
+ * Bind this to NumLock if you prefer that the NumLock key always
+ * changes the NumLock flag.
+ */
+static void bare_num(void)
+{
+	if (!rep)
+		chg_vc_kbd_led(kbd,VC_NUMLOCK);
+}
+
+static void lastcons(void)
+{
+	/* switch to the last used console, ChN */
+	set_console(last_console);
+}
+
+static void decr_console(void)
+{
+	int i;
+ 
+	for (i = fg_console-1; i != fg_console; i--) {
+		if (i == -1)
+			i = MAX_NR_CONSOLES-1;
+		if (vc_cons_allocated(i))
+			break;
+	}
+	set_console(i);
+}
+
+static void incr_console(void)
+{
+	int i;
+
+	for (i = fg_console+1; i != fg_console; i++) {
+		if (i == MAX_NR_CONSOLES)
+			i = 0;
+		if (vc_cons_allocated(i))
+			break;
+	}
+	set_console(i);
+}
+
+static void send_intr(void)
+{
+	if (!tty)
+		return;
+	tty_insert_flip_char(tty, 0, TTY_BREAK);
+	tty_schedule_flip(tty);
+}
+
+static void scroll_forw(void)
+{
+	scrollfront(0);
+}
+
+static void scroll_back(void)
+{
+	scrollback(0);
+}
+
+static void boot_it(void)
+{
+	ctrl_alt_del();
+}
+
+static void compose(void)
+{
+	dead_key_next = 1;
+}
+
+int spawnpid, spawnsig;
+
+static void spawn_console(void)
+{
+        if (spawnpid)
+	   if(kill_proc(spawnpid, spawnsig, 1))
+	     spawnpid = 0;
+}
+
+static void SAK(void)
+{
+	do_SAK(tty);
+#if 0
+	/*
+	 * Need to fix SAK handling to fix up RAW/MEDIUM_RAW and
+	 * vt_cons modes before we can enable RAW/MEDIUM_RAW SAK
+	 * handling.
+	 * 
+	 * We should do this some day --- the whole point of a secure
+	 * attention key is that it should be guaranteed to always
+	 * work.
+	 */
+	reset_vc(fg_console);
+	do_unblank_screen();	/* not in interrupt routine? */
+#endif
+}
+
+static void do_ignore(unsigned char value, char up_flag)
+{
+}
+
+static void do_null()
+{
+	compute_shiftstate();
+}
+
+static void do_spec(unsigned char value, char up_flag)
+{
+	if (up_flag)
+		return;
+	if (value >= SIZE(spec_fn_table))
+		return;
+	spec_fn_table[value]();
+}
+
+static void do_lowercase(unsigned char value, char up_flag)
+{
+	printk("keyboard.c: do_lowercase was called - impossible\n");
+}
+
+static void do_self(unsigned char value, char up_flag)
+{
+	if (up_flag)
+		return; 	/* no action, if this is a key release */
+
+	if (diacr)
+		value = handle_diacr(value);
+
+        if (dead_key_next) {
+                dead_key_next = 0;
+                diacr = value;
+                return;
+        }
+
+	put_queue(value);
+}
+
+#define A_GRAVE  '`'
+#define A_ACUTE  '\''
+#define A_CFLEX  '^'
+#define A_TILDE  '~'
+#define A_DIAER  '"'
+static unsigned char ret_diacr[] =
+        {A_GRAVE, A_ACUTE, A_CFLEX, A_TILDE, A_DIAER };
+
+/* If a dead key pressed twice, output a character corresponding to it, */
+/* otherwise just remember the dead key.				*/
+
+static void do_dead(unsigned char value, char up_flag)
+{
+	if (up_flag)
+		return;
+
+        value = ret_diacr[value];
+        if (diacr == value) {   /* pressed twice */
+                diacr = 0;
+                put_queue(value);
+                return;
+        }
+	diacr = value;
+}
+
+
+/* If space is pressed, return the character corresponding the pending	*/
+/* dead key, otherwise try to combine the two.				*/
+
+unsigned char handle_diacr(unsigned char ch)
+{
+        int d = diacr;
+        int i;
+
+        diacr = 0;
+        if (ch == ' ')
+                return d;
+
+	for (i = 0; i < accent_table_size; i++) {
+		if (accent_table[i].diacr == d && accent_table[i].base == ch)
+			return accent_table[i].result;
+	}
+
+        put_queue(d);
+        return ch;
+}
+
+static void do_cons(unsigned char value, char up_flag)
+{
+	if (up_flag)
+		return;
+	set_console(value);
+}
+
+static void do_fn(unsigned char value, char up_flag)
+{
+	if (up_flag)
+		return;
+	if (value < SIZE(func_table)) {
+		if (func_table[value])
+			puts_queue(func_table[value]);
+	} else
+	        printk("do_fn called with value=%d\n", value);
+}
+
+static void do_pad(unsigned char value, char up_flag)
+{
+	static const char *pad_chars = "0123456789+-*/\015,.?";
+	static const char *app_map = "pqrstuvwxylSRQMnn?";
+
+	if (up_flag)
+		return;		/* no action, if this is a key release */
+
+	/* kludge... shift forces cursor/number keys */
+	if (vc_kbd_mode(kbd,VC_APPLIC) && !k_down[KG_SHIFT]) {
+		applkey(app_map[value], 1);
+		return;
+	}
+
+	if (!vc_kbd_led(kbd,VC_NUMLOCK))
+		switch (value) {
+			case KVAL(K_PCOMMA):
+			case KVAL(K_PDOT):
+				do_fn(KVAL(K_REMOVE), 0);
+				return;
+			case KVAL(K_P0):
+				do_fn(KVAL(K_INSERT), 0);
+				return;
+			case KVAL(K_P1):
+				do_fn(KVAL(K_SELECT), 0);
+				return;
+			case KVAL(K_P2):
+				do_cur(KVAL(K_DOWN), 0);
+				return;
+			case KVAL(K_P3):
+				do_fn(KVAL(K_PGDN), 0);
+				return;
+			case KVAL(K_P4):
+				do_cur(KVAL(K_LEFT), 0);
+				return;
+			case KVAL(K_P6):
+				do_cur(KVAL(K_RIGHT), 0);
+				return;
+			case KVAL(K_P7):
+				do_fn(KVAL(K_FIND), 0);
+				return;
+			case KVAL(K_P8):
+				do_cur(KVAL(K_UP), 0);
+				return;
+			case KVAL(K_P9):
+				do_fn(KVAL(K_PGUP), 0);
+				return;
+			case KVAL(K_P5):
+				applkey('G', vc_kbd_mode(kbd, VC_APPLIC));
+				return;
+		}
+
+	put_queue(pad_chars[value]);
+	if (value == KVAL(K_PENTER) && vc_kbd_mode(kbd, VC_CRLF))
+		put_queue(10);
+}
+
+static void do_cur(unsigned char value, char up_flag)
+{
+	static const char *cur_chars = "BDCA";
+	if (up_flag)
+		return;
+
+	applkey(cur_chars[value], vc_kbd_mode(kbd,VC_CKMODE));
+}
+
+static void do_shift(unsigned char value, char up_flag)
+{
+	int old_state = shift_state;
+
+	if (rep)
+		return;
+
+	/* Mimic typewriter:
+	   a CapsShift key acts like Shift but undoes CapsLock */
+	if (value == KVAL(K_CAPSSHIFT)) {
+		value = KVAL(K_SHIFT);
+		if (!up_flag)
+			clr_vc_kbd_led(kbd, VC_CAPSLOCK);
+	}
+
+	if (up_flag) {
+	        /* handle the case that two shift or control
+		   keys are depressed simultaneously */
+		if (k_down[value])
+			k_down[value]--;
+	} else
+		k_down[value]++;
+
+	if (k_down[value])
+		shift_state |= (1 << value);
+	else
+		shift_state &= ~ (1 << value);
+
+	/* kludge */
+	if (up_flag && shift_state != old_state && npadch != -1) {
+		if (kbd->kbdmode == VC_UNICODE)
+		  to_utf8(npadch & 0xffff);
+		else
+		  put_queue(npadch & 0xff);
+		npadch = -1;
+	}
+}
+
+/* called after returning from RAW mode or when changing consoles -
+   recompute k_down[] and shift_state from key_down[] */
+/* maybe called when keymap is undefined, so that shiftkey release is seen */
+void compute_shiftstate(void)
+{
+	int i, j, k, sym, val;
+
+	shift_state = 0;
+	for(i=0; i < SIZE(k_down); i++)
+	  k_down[i] = 0;
+
+	for(i=0; i < SIZE(key_down); i++)
+	  if(key_down[i]) {	/* skip this word if not a single bit on */
+	    k = i*BITS_PER_LONG;
+	    for(j=0; j<BITS_PER_LONG; j++,k++)
+	      if(test_bit(k, key_down)) {
+		sym = U(plain_map[k]);
+		if(KTYP(sym) == KT_SHIFT) {
+		  val = KVAL(sym);
+		  if (val == KVAL(K_CAPSSHIFT))
+		    val = KVAL(K_SHIFT);
+		  k_down[val]++;
+		  shift_state |= (1<<val);
+	        }
+	      }
+	  }
+}
+
+static void do_meta(unsigned char value, char up_flag)
+{
+	if (up_flag)
+		return;
+
+	if (vc_kbd_mode(kbd, VC_META)) {
+		put_queue('\033');
+		put_queue(value);
+	} else
+		put_queue(value | 0x80);
+}
+
+static void do_ascii(unsigned char value, char up_flag)
+{
+	int base;
+
+	if (up_flag)
+		return;
+
+	if (value < 10)    /* decimal input of code, while Alt depressed */
+	    base = 10;
+	else {       /* hexadecimal input of code, while AltGr depressed */
+	    value -= 10;
+	    base = 16;
+	}
+
+	if (npadch == -1)
+	        npadch = value;
+	else
+		npadch = npadch * base + value;
+}
+
+static void do_lock(unsigned char value, char up_flag)
+{
+	if (up_flag || rep)
+		return;
+	chg_vc_kbd_lock(kbd, value);
+}
+
+static void do_slock(unsigned char value, char up_flag)
+{
+	if (up_flag || rep)
+		return;
+	chg_vc_kbd_slock(kbd, value);
+}
+
+/*
+ * The leds display either (i) the status of NumLock, CapsLock, ScrollLock,
+ * or (ii) whatever pattern of lights people want to show using KDSETLED,
+ * or (iii) specified bits of specified words in kernel memory.
+ */
+
+static unsigned char ledstate = 0xff; /* undefined */
+static unsigned char ledioctl;
+
+unsigned char getledstate(void) {
+    return ledstate;
+}
+
+void setledstate(struct kbd_struct *kbd, unsigned int led) {
+    if (!(led & ~7)) {
+	ledioctl = led;
+	kbd->ledmode = LED_SHOW_IOCTL;
+    } else
+	kbd->ledmode = LED_SHOW_FLAGS;
+    set_leds();
+}
+
+static struct ledptr {
+    unsigned int *addr;
+    unsigned int mask;
+    unsigned char valid:1;
+} ledptrs[3];
+
+void register_leds(int console, unsigned int led,
+		   unsigned int *addr, unsigned int mask) {
+    struct kbd_struct *kbd = kbd_table + console;
+    if (led < 3) {
+	ledptrs[led].addr = addr;
+	ledptrs[led].mask = mask;
+	ledptrs[led].valid = 1;
+	kbd->ledmode = LED_SHOW_MEM;
+    } else
+	kbd->ledmode = LED_SHOW_FLAGS;
+}
+
+static inline unsigned char getleds(void){
+    struct kbd_struct *kbd = kbd_table + fg_console;
+    unsigned char leds;
+
+    if (kbd->ledmode == LED_SHOW_IOCTL)
+      return ledioctl;
+    leds = kbd->ledflagstate;
+    if (kbd->ledmode == LED_SHOW_MEM) {
+	if (ledptrs[0].valid) {
+	    if (*ledptrs[0].addr & ledptrs[0].mask)
+	      leds |= 1;
+	    else
+	      leds &= ~1;
+	}
+	if (ledptrs[1].valid) {
+	    if (*ledptrs[1].addr & ledptrs[1].mask)
+	      leds |= 2;
+	    else
+	      leds &= ~2;
+	}
+	if (ledptrs[2].valid) {
+	    if (*ledptrs[2].addr & ledptrs[2].mask)
+	      leds |= 4;
+	    else
+	      leds &= ~4;
+	}
+    }
+    return leds;
+}
+
+/*
+ * This routine is the bottom half of the keyboard interrupt
+ * routine, and runs with all interrupts enabled. It does
+ * console changing, led setting and copy_to_cooked, which can
+ * take a reasonably long time.
+ *
+ * Aside from timing (which isn't really that important for
+ * keyboard interrupts as they happen often), using the software
+ * interrupt routines for this thing allows us to easily mask
+ * this when we don't want any of the above to happen. Not yet
+ * used, but this allows for easy and efficient race-condition
+ * prevention later on.
+ */
+static void kbd_bh(void)
+{
+	unsigned char leds = getleds();
+
+	if (leds != ledstate) {
+		ledstate = leds;
+		if (mach_kbd_leds)
+			mach_kbd_leds(leds);
+	}
+}
+
+int kbd_init(void)
+{
+	int i;
+	struct kbd_struct kbd0;
+	extern struct tty_driver console_driver;
+
+	kbd0.ledflagstate = kbd0.default_ledflagstate = KBD_DEFLEDS;
+	kbd0.ledmode = LED_SHOW_FLAGS;
+	kbd0.lockstate = KBD_DEFLOCK;
+	kbd0.slockstate = 0;
+	kbd0.modeflags = KBD_DEFMODE;
+	kbd0.kbdmode = VC_XLATE;
+ 
+	for (i = 0 ; i < MAX_NR_CONSOLES ; i++)
+		kbd_table[i] = kbd0;
+
+	ttytab = console_driver.table;
+
+	init_bh(KEYBOARD_BH, kbd_bh);
+	mark_bh(KEYBOARD_BH);
+
+	mach_keyb_init ();
+
+	return 0;
+}