Switched to new syscons driver.

Submitted by:	NOKUBI Hirotaka <hnokubi@yyy.or.jp> and
             	Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>

1 files changed, 983 insertions, 0 deletions

diff --git a/sys/pc98/cbus/pckbd.c b/sys/pc98/cbus/pckbd.c
new file mode 100644
index 0000000..8b1a13c
--- /dev/null
+++ b/sys/pc98/cbus/pckbd.c
@@ -0,0 +1,983 @@
+/*-
+ * $Id$
+ */
+
+#include "pckbd.h"
+#include "opt_kbd.h"
+#include "opt_devfs.h"
+
+#if NPCKBD > 0
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/conf.h>
+#include <sys/proc.h>
+#include <sys/tty.h>
+#include <sys/fcntl.h>
+#include <sys/bus.h>
+#include <sys/malloc.h>
+
+#include <machine/resource.h>
+
+#include <dev/kbd/kbdreg.h>
+
+#include <pc98/pc98/pc98.h>
+#include <pc98/pc98/pc98_machdep.h>
+
+#ifdef __i386__
+#include <i386/isa/isa_device.h>
+#endif
+
+#define DRIVER_NAME		"pckbd"
+
+/* device configuration flags */
+#define KB_CONF_FAIL_IF_NO_KBD	(1 << 0) /* don't install if no kbd is found */
+
+/* some macros */
+#define PC98KBD_UNIT(dev)	minor(dev)
+#define PC98KBD_MKMINOR(unit)	(unit)
+
+/* cdev driver declaration */
+
+typedef struct pckbd_softc {
+	short		flags;
+#define	PC98KBD_ATTACHED	(1 << 0)
+	keyboard_t	*kbd;
+#ifdef KBD_INSTALL_CDEV
+	genkbd_softc_t	gensc;
+#endif
+} pckbd_softc_t;
+
+#define PC98KBD_SOFTC(unit)	pckbd_softc[(unit)]
+
+static pckbd_softc_t	*pckbd_softc[NPCKBD];
+
+static int		pckbdprobe(struct isa_device *dev);
+static int		pckbdattach(struct isa_device *dev);
+
+static ointhand2_t	pckbd_isa_intr;
+
+/* driver declaration for isa_devtab_tty[] */
+struct isa_driver pckbddriver = {
+	pckbdprobe,
+	pckbdattach,
+	DRIVER_NAME,
+	0,
+};
+
+static int		pckbd_probe_unit(int unit, pckbd_softc_t *sc,
+					 int port, int irq, int flags);
+static int		pckbd_attach_unit(int unit, pckbd_softc_t *sc);
+static timeout_t	pckbd_timeout;
+
+#ifdef KBD_INSTALL_CDEV
+
+static d_open_t		pckbdopen;
+static d_close_t	pckbdclose;
+static d_read_t		pckbdread;
+static d_ioctl_t	pckbdioctl;
+static d_poll_t		pckbdpoll;
+
+static struct  cdevsw pckbd_cdevsw = {
+	pckbdopen,	pckbdclose,	pckbdread,	nowrite,
+	pckbdioctl,	nostop,		nullreset,	nodevtotty,
+	pckbdpoll,	nommap,		NULL,		DRIVER_NAME,
+	NULL,		-1,
+};
+
+#endif /* KBD_INSTALL_CDEV */
+
+static int
+pckbdprobe(struct isa_device *dev)
+{
+	pckbd_softc_t *sc;
+	int error;
+
+	if (dev->id_unit >= sizeof(pckbd_softc)/sizeof(pckbd_softc[0]))
+		return 0;
+	sc = pckbd_softc[dev->id_unit];
+	if (sc == NULL) {
+		sc = pckbd_softc[dev->id_unit]
+		   = malloc(sizeof(*sc), M_DEVBUF, M_NOWAIT);
+		if (sc == NULL)
+			return 0;
+		bzero(sc, sizeof(*sc));
+	}
+
+	/* try to find a keyboard */
+	error = pckbd_probe_unit(dev->id_unit, sc, dev->id_iobase,
+				 dev->id_irq, dev->id_flags);
+	if (error)
+		return 0;
+
+	/* declare our interrupt handler */
+	dev->id_ointr = pckbd_isa_intr;
+
+	return IO_KBDSIZE;
+}
+
+static int
+pckbdattach(struct isa_device *dev)
+{
+	pckbd_softc_t *sc;
+
+	if (dev->id_unit >= sizeof(pckbd_softc)/sizeof(pckbd_softc[0]))
+		return 0;
+	sc = pckbd_softc[dev->id_unit];
+	if (sc == NULL)
+		return 0;
+
+	return ((pckbd_attach_unit(dev->id_unit, sc)) ? 0 : 1);
+}
+
+static void
+pckbd_isa_intr(int unit)
+{
+	keyboard_t *kbd;
+
+	kbd = pckbd_softc[unit]->kbd;
+	(*kbdsw[kbd->kb_index]->intr)(kbd, NULL);
+}
+
+static int
+pckbd_probe_unit(int unit, pckbd_softc_t *sc, int port, int irq, int flags)
+{
+	keyboard_switch_t *sw;
+	int args[2];
+
+	if (sc->flags & PC98KBD_ATTACHED)
+		return 0;
+
+	sw = kbd_get_switch(DRIVER_NAME);
+	if (sw == NULL)
+		return ENXIO;
+
+	args[0] = port;
+	args[1] = irq;
+	return (*sw->probe)(unit, &sc->kbd, args, flags);
+}
+
+static int
+pckbd_attach_unit(int unit, pckbd_softc_t *sc)
+{
+	keyboard_switch_t *sw;
+	int error;
+
+	if (sc->flags & PC98KBD_ATTACHED)
+		return 0;
+
+	sw = kbd_get_switch(DRIVER_NAME);
+	if (sw == NULL)
+		return ENXIO;
+
+	/* reset, initialize and enable the device */
+	error = (*sw->init)(sc->kbd);
+	if (error)
+		return ENXIO;
+	(*sw->enable)(sc->kbd);
+
+#ifdef KBD_INSTALL_CDEV
+	/* attach a virtual keyboard cdev */
+	error = kbd_attach(makedev(0, PC98KBD_MKMINOR(unit)), sc->kbd,
+			   &pckbd_cdevsw);
+	if (error)
+		return error;
+#endif /* KBD_INSTALL_CDEV */
+
+	/*
+	 * This is a kludge to compensate for lost keyboard interrupts.
+	 * A similar code used to be in syscons. See below. XXX
+	 */
+	pckbd_timeout(sc->kbd);
+
+	if (bootverbose)
+		(*sw->diag)(sc->kbd, bootverbose);
+
+	sc->flags |= PC98KBD_ATTACHED;
+	return 0;
+}
+
+static void
+pckbd_timeout(void *arg)
+{
+	keyboard_t *kbd;
+	int s;
+
+	/* The following comments are extracted from syscons.c (1.287) */
+	/* 
+	 * With release 2.1 of the Xaccel server, the keyboard is left
+	 * hanging pretty often. Apparently an interrupt from the
+	 * keyboard is lost, and I don't know why (yet).
+	 * This ugly hack calls scintr if input is ready for the keyboard
+	 * and conveniently hides the problem.			XXX
+	 */
+	/*
+	 * Try removing anything stuck in the keyboard controller; whether
+	 * it's a keyboard scan code or mouse data. `scintr()' doesn't
+	 * read the mouse data directly, but `kbdio' routines will, as a
+	 * side effect.
+	 */
+	s = spltty();
+	kbd = (keyboard_t *)arg;
+	if ((*kbdsw[kbd->kb_index]->lock)(kbd, TRUE)) {
+		/*
+		 * We have seen the lock flag is not set. Let's reset
+		 * the flag early, otherwise the LED update routine fails
+		 * which may want the lock during the interrupt routine.
+		 */
+		(*kbdsw[kbd->kb_index]->lock)(kbd, FALSE);
+		if ((*kbdsw[kbd->kb_index]->check_char)(kbd))
+			(*kbdsw[kbd->kb_index]->intr)(kbd, NULL);
+	}
+	splx(s);
+	timeout(pckbd_timeout, arg, hz/10);
+}
+
+/* cdev driver functions */
+
+#ifdef KBD_INSTALL_CDEV
+
+static int
+pckbdopen(dev_t dev, int flag, int mode, struct proc *p)
+{
+	pckbd_softc_t *sc;
+	int unit;
+
+	unit = PC98KBD_UNIT(dev);
+	if ((unit >= NPCKBD) || ((sc = PC98KBD_SOFTC(unit)) == NULL))
+		return ENXIO;
+	if (mode & (FWRITE | O_CREAT | O_APPEND | O_TRUNC))
+		return ENODEV;
+
+	/* FIXME: set the initial input mode (K_XLATE?) and lock state? */
+	return genkbdopen(&sc->gensc, sc->kbd, flag, mode, p);
+}
+
+static int
+pckbdclose(dev_t dev, int flag, int mode, struct proc *p)
+{
+	pckbd_softc_t *sc;
+
+	sc = PC98KBD_SOFTC(PC98KBD_UNIT(dev));
+	return genkbdclose(&sc->gensc, sc->kbd, flag, mode, p);
+}
+
+static int
+pckbdread(dev_t dev, struct uio *uio, int flag)
+{
+	pckbd_softc_t *sc;
+
+	sc = PC98KBD_SOFTC(PC98KBD_UNIT(dev));
+	return genkbdread(&sc->gensc, sc->kbd, uio, flag);
+}
+
+static int
+pckbdioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct proc *p)
+{
+	pckbd_softc_t *sc;
+
+	sc = PC98KBD_SOFTC(PC98KBD_UNIT(dev));
+	return genkbdioctl(&sc->gensc, sc->kbd, cmd, arg, flag, p);
+}
+
+static int
+pckbdpoll(dev_t dev, int event, struct proc *p)
+{
+	pckbd_softc_t *sc;
+
+	sc = PC98KBD_SOFTC(PC98KBD_UNIT(dev));
+	return genkbdpoll(&sc->gensc, sc->kbd, event, p);
+}
+
+#endif /* KBD_INSTALL_CDEV */
+
+/* LOW-LEVEL */
+
+#include <machine/limits.h>
+#include <machine/console.h>
+#include <machine/clock.h>
+
+#define PC98KBD_DEFAULT	0
+
+typedef caddr_t		KBDC;
+
+typedef struct pckbd_state {
+	KBDC		kbdc;		/* keyboard controller */
+	int		ks_mode;	/* input mode (K_XLATE,K_RAW,K_CODE) */
+	int		ks_flags;	/* flags */
+#define COMPOSE		(1 << 0)
+	int		ks_state;	/* shift/lock key state */
+	int		ks_accents;	/* accent key index (> 0) */
+	u_int		ks_composed_char; /* composed char code (> 0) */
+} pckbd_state_t;
+
+/* keyboard driver declaration */
+static int		pckbd_configure(int flags);
+static kbd_probe_t	pckbd_probe;
+static kbd_init_t	pckbd_init;
+static kbd_term_t	pckbd_term;
+static kbd_intr_t	pckbd_intr;
+static kbd_test_if_t	pckbd_test_if;
+static kbd_enable_t	pckbd_enable;
+static kbd_disable_t	pckbd_disable;
+static kbd_read_t	pckbd_read;
+static kbd_check_t	pckbd_check;
+static kbd_read_char_t	pckbd_read_char;
+static kbd_check_char_t	pckbd_check_char;
+static kbd_ioctl_t	pckbd_ioctl;
+static kbd_lock_t	pckbd_lock;
+static kbd_clear_state_t pckbd_clear_state;
+static kbd_get_state_t	pckbd_get_state;
+static kbd_set_state_t	pckbd_set_state;
+
+keyboard_switch_t pckbdsw = {
+	pckbd_probe,
+	pckbd_init,
+	pckbd_term,
+	pckbd_intr,
+	pckbd_test_if,
+	pckbd_enable,
+	pckbd_disable,
+	pckbd_read,
+	pckbd_check,
+	pckbd_read_char,
+	pckbd_check_char,
+	pckbd_ioctl,
+	pckbd_lock,
+	pckbd_clear_state,
+	pckbd_get_state,
+	pckbd_set_state,
+	genkbd_get_fkeystr,
+	genkbd_diag,
+};
+
+KEYBOARD_DRIVER(pckbd, pckbdsw, pckbd_configure);
+
+struct kbdc_softc {
+    int port;			/* base port address */
+    int lock;			/* FIXME: XXX not quite a semaphore... */
+}; 
+
+/* local functions */
+static int		probe_keyboard(KBDC kbdc, int flags);
+static int		init_keyboard(KBDC kbdc, int *type, int flags);
+static KBDC		kbdc_open(int port);
+static int		kbdc_lock(KBDC kbdc, int lock);
+static int		kbdc_data_ready(KBDC kbdc);
+static int		read_kbd_data(KBDC kbdc);
+static int		read_kbd_data_no_wait(KBDC kbdc);
+static int		wait_for_kbd_data(struct kbdc_softc *kbdc);
+
+/* local variables */
+
+/* the initial key map, accent map and fkey strings */
+#include <i386/isa/kbdtables.h>
+
+/* structures for the default keyboard */
+static keyboard_t	default_kbd;
+static pckbd_state_t	default_kbd_state;
+static keymap_t		default_keymap;
+static accentmap_t	default_accentmap;
+static fkeytab_t	default_fkeytab[NUM_FKEYS];
+
+/* 
+ * The back door to the keyboard driver!
+ * This function is called by the console driver, via the kbdio module,
+ * to tickle keyboard drivers when the low-level console is being initialized.
+ * Almost nothing in the kernel has been initialied yet.  Try to probe
+ * keyboards if possible.
+ * NOTE: because of the way the low-level conole is initialized, this routine
+ * may be called more than once!!
+ */
+static int
+pckbd_configure(int flags)
+{
+	keyboard_t *kbd;
+	KBDC kbdc;
+	int arg[2];
+	struct isa_device *dev;
+
+	/* XXX: a kludge to obtain the device configuration flags */
+	dev = find_isadev(isa_devtab_tty, &pckbddriver, 0);
+	if (dev != NULL)
+		flags |= dev->id_flags;
+
+	/* probe the default keyboard */
+	arg[0] = -1;
+	arg[1] = -1;
+	if (pckbd_probe(PC98KBD_DEFAULT, &kbd, arg, flags))
+		return 0;
+
+	/* initialize it */
+	kbdc = ((pckbd_state_t *)kbd->kb_data)->kbdc;
+	if (!(flags & KB_CONF_PROBE_ONLY) && !KBD_IS_PROBED(kbd)) {
+		if (KBD_HAS_DEVICE(kbd)
+		    && init_keyboard(kbdc, &kbd->kb_type, flags)
+		    && (flags & KB_CONF_FAIL_IF_NO_KBD))
+			return 0;
+		KBD_INIT_DONE(kbd);
+	}
+
+	/* and register */
+	if (!KBD_IS_CONFIGURED(kbd)) {
+		if (kbd_register(kbd) < 0)
+			return 0;
+		KBD_CONFIG_DONE(kbd);
+	}
+
+	return 1;	/* return the number of found keyboards */
+}
+
+/* low-level functions */
+
+/* initialize the keyboard_t structure and try to detect a keyboard */
+static int
+pckbd_probe(int unit, keyboard_t **kbdp, void *arg, int flags)
+{
+	keyboard_t *kbd;
+	pckbd_state_t *state;
+	keymap_t *keymap;
+	accentmap_t *accmap;
+	fkeytab_t *fkeymap;
+	int fkeymap_size;
+	KBDC kbdc;
+	int *data = (int *)arg;
+
+	if (unit != PC98KBD_DEFAULT)
+		return ENXIO;
+
+	*kbdp = kbd = &default_kbd;
+	if (KBD_IS_PROBED(kbd))
+		return 0;
+	state = &default_kbd_state;
+	keymap = &default_keymap;
+	accmap = &default_accentmap;
+	fkeymap = default_fkeytab;
+	fkeymap_size = sizeof(default_fkeytab)/sizeof(default_fkeytab[0]);
+
+	state->kbdc = kbdc = kbdc_open(data[0]);
+	if (kbdc == NULL)
+		return ENXIO;
+	kbd_init_struct(kbd, DRIVER_NAME, KB_OTHER, unit, flags, data[0],
+			IO_KBDSIZE);
+	bcopy(&key_map, keymap, sizeof(key_map));
+	bcopy(&accent_map, accmap, sizeof(accent_map));
+	bcopy(fkey_tab, fkeymap,
+	      imin(fkeymap_size*sizeof(fkeymap[0]), sizeof(fkey_tab)));
+	kbd_set_maps(kbd, keymap, accmap, fkeymap, fkeymap_size);
+	kbd->kb_data = (void *)state;
+
+	if (probe_keyboard(kbdc, flags)) {
+		if (flags & KB_CONF_FAIL_IF_NO_KBD)
+			return ENXIO;
+	} else {
+		KBD_FOUND_DEVICE(kbd);
+	}
+	pckbd_clear_state(kbd);
+	state->ks_mode = K_XLATE;
+
+	KBD_PROBE_DONE(kbd);
+	return 0;
+}
+
+/* reset and initialize the device */
+static int
+pckbd_init(keyboard_t *kbd)
+{
+	KBDC kbdc;
+
+	if ((kbd == NULL) || !KBD_IS_PROBED(kbd))
+		return ENXIO;		/* shouldn't happen */
+	kbdc = ((pckbd_state_t *)kbd->kb_data)->kbdc;
+	if (kbdc == NULL)
+		return ENXIO;		/* shouldn't happen */
+
+	if (!KBD_IS_INITIALIZED(kbd)) {
+		if (KBD_HAS_DEVICE(kbd)
+		    && init_keyboard(kbdc, &kbd->kb_type, kbd->kb_config)
+		    && (kbd->kb_config & KB_CONF_FAIL_IF_NO_KBD))
+			return ENXIO;
+		pckbd_ioctl(kbd, KDSETLED,
+			(caddr_t)&((pckbd_state_t *)(kbd->kb_data))->ks_state);
+		KBD_INIT_DONE(kbd);
+	}
+	if (!KBD_IS_CONFIGURED(kbd)) {
+		if (kbd_register(kbd) < 0)
+			return ENXIO;
+		KBD_CONFIG_DONE(kbd);
+	}
+
+	return 0;
+}
+
+/* finish using this keyboard */
+static int
+pckbd_term(keyboard_t *kbd)
+{
+	kbd_unregister(kbd);
+	return 0;
+}
+
+/* keyboard interrupt routine */
+static int
+pckbd_intr(keyboard_t *kbd, void *arg)
+{
+	int c;
+
+	if (KBD_IS_ACTIVE(kbd) && KBD_IS_BUSY(kbd)) {
+		/* let the callback function to process the input */
+		(*kbd->kb_callback.kc_func)(kbd, KBDIO_KEYINPUT,
+					    kbd->kb_callback.kc_arg);
+	} else {
+		/* read and discard the input; no one is waiting for input */
+		do {
+			c = pckbd_read_char(kbd, FALSE);
+		} while (c != NOKEY);
+	}
+	return 0;
+}
+
+/* test the interface to the device */
+static int
+pckbd_test_if(keyboard_t *kbd)
+{
+	return 0;
+}
+
+/* 
+ * Enable the access to the device; until this function is called,
+ * the client cannot read from the keyboard.
+ */
+static int
+pckbd_enable(keyboard_t *kbd)
+{
+	int s;
+
+	s = spltty();
+	KBD_ACTIVATE(kbd);
+	splx(s);
+	return 0;
+}
+
+/* disallow the access to the device */
+static int
+pckbd_disable(keyboard_t *kbd)
+{
+	int s;
+
+	s = spltty();
+	KBD_DEACTIVATE(kbd);
+	splx(s);
+	return 0;
+}
+
+/* read one byte from the keyboard if it's allowed */
+static int
+pckbd_read(keyboard_t *kbd, int wait)
+{
+	int c;
+
+	if (wait)
+		c = read_kbd_data(((pckbd_state_t *)kbd->kb_data)->kbdc);
+	else
+		c = read_kbd_data_no_wait(((pckbd_state_t *)kbd->kb_data)->kbdc);
+	return (KBD_IS_ACTIVE(kbd) ? c : -1);
+}
+
+/* check if data is waiting */
+static int
+pckbd_check(keyboard_t *kbd)
+{
+	if (!KBD_IS_ACTIVE(kbd))
+		return FALSE;
+	return kbdc_data_ready(((pckbd_state_t *)kbd->kb_data)->kbdc);
+}
+
+/* read char from the keyboard */
+static u_int
+pckbd_read_char(keyboard_t *kbd, int wait)
+{
+	pckbd_state_t *state;
+	u_int action;
+	int scancode;
+	int keycode;
+
+	state = (pckbd_state_t *)kbd->kb_data;
+next_code:
+	/* do we have a composed char to return? */
+	if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0)) {
+		action = state->ks_composed_char;
+		state->ks_composed_char = 0;
+		if (action > UCHAR_MAX)
+			return ERRKEY;
+		return action;
+	}
+
+	/* see if there is something in the keyboard port */
+	if (wait) {
+		do {
+			scancode = read_kbd_data(state->kbdc);
+		} while (scancode == -1);
+	} else {
+		scancode = read_kbd_data_no_wait(state->kbdc);
+		if (scancode == -1)
+			return NOKEY;
+	}
+
+	/* return the byte as is for the K_RAW mode */
+	if (state->ks_mode == K_RAW)
+		return scancode;
+
+	/* translate the scan code into a keycode */
+	keycode = scancode & 0x7F;
+	switch(scancode) {
+	case 0xF3:	/* GRPH (compose key) released */
+		if (state->ks_flags & COMPOSE) {
+			state->ks_flags &= ~COMPOSE;
+			if (state->ks_composed_char > UCHAR_MAX)
+				state->ks_composed_char = 0;
+		}
+		break;
+	case 0x73:	/* GRPH (compose key) pressed */
+		if (!(state->ks_flags & COMPOSE)) {
+			state->ks_flags |= COMPOSE;
+			state->ks_composed_char = 0;
+		}
+		break;
+	}
+
+	/* return the key code in the K_CODE mode */
+	if (state->ks_mode == K_CODE)
+		return (keycode | (scancode & 0x80));
+
+	/* compose a character code */
+	if (state->ks_flags & COMPOSE) {
+		switch (scancode) {
+		/* key pressed, process it */
+		case 0x42: case 0x43: case 0x44:	/* keypad 7,8,9 */
+			state->ks_composed_char *= 10;
+			state->ks_composed_char += scancode - 0x3B;
+			if (state->ks_composed_char > UCHAR_MAX)
+				return ERRKEY;
+			goto next_code;
+		case 0x46: case 0x47: case 0x48:	/* keypad 4,5,6 */
+			state->ks_composed_char *= 10;
+			state->ks_composed_char += scancode - 0x42;
+			if (state->ks_composed_char > UCHAR_MAX)
+				return ERRKEY;
+			goto next_code;
+		case 0x4A: case 0x4B: case 0x4C:	/* keypad 1,2,3 */
+			state->ks_composed_char *= 10;
+			state->ks_composed_char += scancode - 0x49;
+			if (state->ks_composed_char > UCHAR_MAX)
+				return ERRKEY;
+			goto next_code;
+		case 0x4E:				/* keypad 0 */
+			state->ks_composed_char *= 10;
+			if (state->ks_composed_char > UCHAR_MAX)
+				return ERRKEY;
+			goto next_code;
+
+		/* key released, no interest here */
+		case 0xC2: case 0xC3: case 0xC4:	/* keypad 7,8,9 */
+		case 0xC6: case 0xC7: case 0xC8:	/* keypad 4,5,6 */
+		case 0xCA: case 0xCB: case 0xCC:	/* keypad 1,2,3 */
+		case 0xCE:				/* keypad 0 */
+			goto next_code;
+
+		case 0x73:				/* GRPH key */
+			break;
+
+		default:
+			if (state->ks_composed_char > 0) {
+				state->ks_flags &= ~COMPOSE;
+				state->ks_composed_char = 0;
+				return ERRKEY;
+			}
+			break;
+		}
+	}
+
+	/* keycode to key action */
+	action = genkbd_keyaction(kbd, keycode, scancode & 0x80,
+				  &state->ks_state, &state->ks_accents);
+	if (action == NOKEY)
+		goto next_code;
+	else
+		return action;
+}
+
+/* check if char is waiting */
+static int
+pckbd_check_char(keyboard_t *kbd)
+{
+	pckbd_state_t *state;
+
+	if (!KBD_IS_ACTIVE(kbd))
+		return FALSE;
+	state = (pckbd_state_t *)kbd->kb_data;
+	if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0))
+		return TRUE;
+	return kbdc_data_ready(state->kbdc);
+}
+
+/* some useful control functions */
+static int
+pckbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
+{
+	pckbd_state_t *state = kbd->kb_data;
+	int s;
+	int i;
+
+	s = spltty();
+	switch (cmd) {
+
+	case KDGKBMODE:		/* get keyboard mode */
+		*(int *)arg = state->ks_mode;
+		break;
+	case KDSKBMODE:		/* set keyboard mode */
+		switch (*(int *)arg) {
+		case K_XLATE:
+			if (state->ks_mode != K_XLATE) {
+				/* make lock key state and LED state match */
+				state->ks_state &= ~LOCK_MASK;
+				state->ks_state |= KBD_LED_VAL(kbd);
+			}
+			/* FALL THROUGH */
+		case K_RAW:
+		case K_CODE:
+			if (state->ks_mode != *(int *)arg) {
+				pckbd_clear_state(kbd);
+				state->ks_mode = *(int *)arg;
+			}
+			break;
+		default:
+			splx(s);
+			return EINVAL;
+		}
+		break;
+
+	case KDGETLED:		/* get keyboard LED */
+		*(int *)arg = KBD_LED_VAL(kbd);
+		break;
+	case KDSETLED:		/* set keyboard LED */
+		/* NOTE: lock key state in ks_state won't be changed */
+		if (*(int *)arg & ~LOCK_MASK) {
+			splx(s);
+			return EINVAL;
+		}
+		i = *(int *)arg;
+		/* replace CAPS LED with ALTGR LED for ALTGR keyboards */
+		if (kbd->kb_keymap->n_keys > ALTGR_OFFSET) {
+			if (i & ALKED)
+				i |= CLKED;
+			else
+				i &= ~CLKED;
+		}
+		KBD_LED_VAL(kbd) = *(int *)arg;
+		break;
+
+	case KDGKBSTATE:	/* get lock key state */
+		*(int *)arg = state->ks_state & LOCK_MASK;
+		break;
+	case KDSKBSTATE:	/* set lock key state */
+		if (*(int *)arg & ~LOCK_MASK) {
+			splx(s);
+			return EINVAL;
+		}
+		state->ks_state &= ~LOCK_MASK;
+		state->ks_state |= *(int *)arg;
+		splx(s);
+		/* set LEDs and quit */
+		return pckbd_ioctl(kbd, KDSETLED, arg);
+
+	case KDSETRAD:		/* set keyboard repeat rate */
+		break;
+
+	case PIO_KEYMAP:	/* set keyboard translation table */
+	case PIO_KEYMAPENT:	/* set keyboard translation table entry */
+	case PIO_DEADKEYMAP:	/* set accent key translation table */
+		state->ks_accents = 0;
+		/* FALL THROUGH */
+	default:
+		splx(s);
+		return genkbd_commonioctl(kbd, cmd, arg);
+	}
+
+	splx(s);
+	return 0;
+}
+
+/* lock the access to the keyboard */
+static int
+pckbd_lock(keyboard_t *kbd, int lock)
+{
+	return kbdc_lock(((pckbd_state_t *)kbd->kb_data)->kbdc, lock);
+}
+
+/* clear the internal state of the keyboard */
+static void
+pckbd_clear_state(keyboard_t *kbd)
+{
+	pckbd_state_t *state;
+
+	state = (pckbd_state_t *)kbd->kb_data;
+	state->ks_flags = 0;
+	state->ks_state &= LOCK_MASK;	/* preserve locking key state */
+	state->ks_accents = 0;
+	state->ks_composed_char = 0;
+}
+
+/* save the internal state */
+static int
+pckbd_get_state(keyboard_t *kbd, void *buf, size_t len)
+{
+	if (len == 0)
+		return sizeof(pckbd_state_t);
+	if (len < sizeof(pckbd_state_t))
+		return -1;
+	bcopy(kbd->kb_data, buf, sizeof(pckbd_state_t));
+	return 0;
+}
+
+/* set the internal state */
+static int
+pckbd_set_state(keyboard_t *kbd, void *buf, size_t len)
+{
+	if (len < sizeof(pckbd_state_t))
+		return ENOMEM;
+	if (((pckbd_state_t *)kbd->kb_data)->kbdc
+		!= ((pckbd_state_t *)buf)->kbdc)
+		return ENOMEM;
+	bcopy(buf, kbd->kb_data, sizeof(pckbd_state_t));
+	return 0;
+}
+
+/* local functions */
+
+static int
+probe_keyboard(KBDC kbdc, int flags)
+{
+	return 0;
+}
+
+static int
+init_keyboard(KBDC kbdc, int *type, int flags)
+{
+	*type = KB_OTHER;
+	return 0;
+}
+
+/* keyboard I/O routines */
+
+/* retry count */
+#ifndef KBD_MAXRETRY
+#define KBD_MAXRETRY	3
+#endif
+
+/* timing parameters */
+#ifndef KBD_RESETDELAY
+#define KBD_RESETDELAY  200     /* wait 200msec after kbd/mouse reset */
+#endif
+#ifndef KBD_MAXWAIT
+#define KBD_MAXWAIT	5 	/* wait 5 times at most after reset */
+#endif
+
+/* I/O recovery time */
+#define KBDC_DELAYTIME	37
+#define KBDD_DELAYTIME	37
+
+/* I/O ports */
+#define KBD_STATUS_PORT 	2	/* status port, read */
+#define KBD_DATA_PORT		0	/* data port, read */
+
+/* status bits (KBD_STATUS_PORT) */
+#define KBDS_BUFFER_FULL	0x0002
+
+/* macros */
+
+#define kbdcp(p)		((struct kbdc_softc *)(p))
+
+/* local variables */
+
+static struct kbdc_softc kbdc_softc[NPCKBD] = { { 0 }, };
+
+/* associate a port number with a KBDC */
+
+static KBDC
+kbdc_open(int port)
+{
+	if (port <= 0)
+		port = IO_KBD;
+
+	if (NPCKBD) {
+		/* PC-98 has only one keyboard I/F */
+		kbdc_softc[0].port = port;
+		kbdc_softc[0].lock = FALSE;
+		return (KBDC)&kbdc_softc[0];
+	}
+	return NULL;	/* You didn't include sc driver in your config file */
+}
+
+/* set/reset polling lock */
+static int 
+kbdc_lock(KBDC p, int lock)
+{
+    int prevlock;
+
+    prevlock = kbdcp(p)->lock;
+    kbdcp(p)->lock = lock;
+
+    return (prevlock != lock);
+}
+
+/* check if any data is waiting to be processed */
+static int
+kbdc_data_ready(KBDC p)
+{
+	return (inb(kbdcp(p)->port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL);
+}
+
+/* wait for data from the keyboard */
+static int
+wait_for_kbd_data(struct kbdc_softc *kbdc)
+{
+    /* CPU will stay inside the loop for 200msec at most */
+    int retry = 10000;
+    int port = kbdc->port;
+
+    while (!(inb(port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL)) {
+	DELAY(KBDD_DELAYTIME);
+	DELAY(KBDC_DELAYTIME);
+        if (--retry < 0)
+    	    return 0;
+    }
+    DELAY(KBDD_DELAYTIME);
+    return 1;
+}
+
+/* read one byte from the keyboard */
+static int
+read_kbd_data(KBDC p)
+{
+    if (!wait_for_kbd_data(kbdcp(p)))
+        return -1;		/* timeout */
+    DELAY(KBDC_DELAYTIME);
+    return inb(kbdcp(p)->port + KBD_DATA_PORT);
+}
+
+/* read one byte from the keyboard, but return immediately if 
+ * no data is waiting
+ */
+static int
+read_kbd_data_no_wait(KBDC p)
+{
+    if (inb(kbdcp(p)->port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL) {
+        DELAY(KBDD_DELAYTIME);
+        return inb(kbdcp(p)->port + KBD_DATA_PORT);
+    }
+    return -1;		/* no data */
+}
+
+#endif /* NPCKBD > 0 */