1 files changed, 713 insertions, 0 deletions

diff --git a/sys/arm/versatile/pl050.c b/sys/arm/versatile/pl050.c
new file mode 100644
index 0000000..f6662b1
--- /dev/null
+++ b/sys/arm/versatile/pl050.c
@@ -0,0 +1,713 @@
+/*
+ * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
+ * All rights reserved.
+ *
+ * Based on dev/usb/input/ukbd.c  
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/rman.h>
+#include <sys/proc.h>
+#include <sys/sched.h>
+#include <sys/kdb.h>
+
+#include <machine/bus.h>
+#include <machine/cpu.h>
+#include <machine/frame.h>
+#include <machine/intr.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <sys/ioccom.h>
+#include <sys/filio.h>
+#include <sys/tty.h>
+#include <sys/kbio.h>
+
+#include <dev/kbd/kbdreg.h>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+
+#include <dev/kbd/kbdtables.h>
+
+#define	KMI_LOCK()	mtx_lock(&Giant)
+#define	KMI_UNLOCK()	mtx_unlock(&Giant)
+
+#ifdef	INVARIANTS
+/*
+ * Assert that the lock is held in all contexts
+ * where the code can be executed.
+ */
+#define	KMI_LOCK_ASSERT()	mtx_assert(&Giant, MA_OWNED)
+/*
+ * Assert that the lock is held in the contexts
+ * where it really has to be so.
+ */
+#define	KMI_CTX_LOCK_ASSERT()			 	\
+	do {						\
+		if (!kdb_active && panicstr == NULL)	\
+			mtx_assert(&Giant, MA_OWNED);	\
+	} while (0)
+#else
+#define KMI_LOCK_ASSERT()	(void)0
+#define KMI_CTX_LOCK_ASSERT()	(void)0
+#endif
+
+#define	KMICR		0x00
+#define		KMICR_TYPE_NONPS2	(1 << 5)
+#define		KMICR_RXINTREN		(1 << 4)
+#define		KMICR_TXINTREN		(1 << 3)
+#define		KMICR_EN		(1 << 2)
+#define		KMICR_FKMID		(1 << 1)
+#define		KMICR_FKMIC		(1 << 0)
+#define	KMISTAT		0x04
+#define		KMISTAT_TXEMPTY		(1 << 6)
+#define		KMISTAT_TXBUSY		(1 << 5)
+#define		KMISTAT_RXFULL		(1 << 4)
+#define		KMISTAT_RXBUSY		(1 << 3)
+#define		KMISTAT_RXPARITY	(1 << 2)
+#define		KMISTAT_KMIC		(1 << 1)
+#define		KMISTAT_KMID		(1 << 0)
+#define	KMIDATA		0x08
+#define	KMICLKDIV	0x0C
+#define	KMIIR		0x10
+#define		KMIIR_TXINTR		(1 << 1)
+#define		KMIIR_RXINTR		(1 << 0)
+
+#define	KMI_DRIVER_NAME          "kmi"
+#define	KMI_NFKEY        (sizeof(fkey_tab)/sizeof(fkey_tab[0]))	/* units */
+
+struct kmi_softc {
+	keyboard_t sc_kbd;
+	keymap_t sc_keymap;
+	accentmap_t sc_accmap;
+	fkeytab_t sc_fkeymap[KMI_NFKEY];
+
+	struct resource*	sc_mem_res;
+	struct resource*	sc_irq_res;
+	void*			sc_intr_hl;
+
+	int			sc_mode;		/* input mode (K_XLATE,K_RAW,K_CODE) */
+	int			sc_state;		/* shift/lock key state */
+	int			sc_accents;		/* accent key index (> 0) */
+	uint32_t		sc_flags;		/* flags */
+#define	KMI_FLAG_COMPOSE	0x00000001
+#define	KMI_FLAG_POLLING	0x00000002
+
+	struct			thread *sc_poll_thread;
+};
+
+/* Read/Write macros for Timer used as timecounter */
+#define pl050_kmi_read_4(sc, reg)		\
+	bus_read_4((sc)->sc_mem_res, (reg))
+
+#define pl050_kmi_write_4(sc, reg, val)	\
+	bus_write_4((sc)->sc_mem_res, (reg), (val))
+
+/* prototypes */
+static void	kmi_set_leds(struct kmi_softc *, uint8_t);
+static int	kmi_set_typematic(keyboard_t *, int);
+static uint32_t	kmi_read_char(keyboard_t *, int);
+static void	kmi_clear_state(keyboard_t *);
+static int	kmi_ioctl(keyboard_t *, u_long, caddr_t);
+static int	kmi_enable(keyboard_t *);
+static int	kmi_disable(keyboard_t *);
+
+/* early keyboard probe, not supported */
+static int
+kmi_configure(int flags)
+{
+	return (0);
+}
+
+/* detect a keyboard, not used */
+static int
+kmi_probe(int unit, void *arg, int flags)
+{
+	return (ENXIO);
+}
+
+/* reset and initialize the device, not used */
+static int
+kmi_init(int unit, keyboard_t **kbdp, void *arg, int flags)
+{
+	return (ENXIO);
+}
+
+/* test the interface to the device, not used */
+static int
+kmi_test_if(keyboard_t *kbd)
+{
+	return (0);
+}
+
+/* finish using this keyboard, not used */
+static int
+kmi_term(keyboard_t *kbd)
+{
+	return (ENXIO);
+}
+
+/* keyboard interrupt routine, not used */
+static int
+kmi_intr(keyboard_t *kbd, void *arg)
+{
+
+	return (0);
+}
+
+/* lock the access to the keyboard, not used */
+static int
+kmi_lock(keyboard_t *kbd, int lock)
+{
+	return (1);
+}
+
+/*
+ * Enable the access to the device; until this function is called,
+ * the client cannot read from the keyboard.
+ */
+static int
+kmi_enable(keyboard_t *kbd)
+{
+
+	KMI_LOCK();
+	KBD_ACTIVATE(kbd);
+	KMI_UNLOCK();
+
+	return (0);
+}
+
+/* disallow the access to the device */
+static int
+kmi_disable(keyboard_t *kbd)
+{
+
+	KMI_LOCK();
+	KBD_DEACTIVATE(kbd);
+	KMI_UNLOCK();
+
+	return (0);
+}
+
+/* check if data is waiting */
+static int
+kmi_check(keyboard_t *kbd)
+{
+	struct kmi_softc *sc = kbd->kb_data;
+	uint32_t reg;
+
+	KMI_CTX_LOCK_ASSERT();
+
+	if (!KBD_IS_ACTIVE(kbd))
+		return (0);
+
+	reg = pl050_kmi_read_4(sc, KMIIR);
+	return (reg & KMIIR_RXINTR);
+}
+
+/* check if char is waiting */
+static int
+kmi_check_char_locked(keyboard_t *kbd)
+{
+	KMI_CTX_LOCK_ASSERT();
+
+	if (!KBD_IS_ACTIVE(kbd))
+		return (0);
+
+	return (kmi_check(kbd));
+}
+
+static int
+kmi_check_char(keyboard_t *kbd)
+{
+	int result;
+
+	KMI_LOCK();
+	result = kmi_check_char_locked(kbd);
+	KMI_UNLOCK();
+
+	return (result);
+}
+
+/* read one byte from the keyboard if it's allowed */
+/* Currently unused. */
+static int
+kmi_read(keyboard_t *kbd, int wait)
+{
+	KMI_CTX_LOCK_ASSERT();
+
+	if (!KBD_IS_ACTIVE(kbd))
+		return (-1);
+
+	++(kbd->kb_count);
+	printf("Implement ME: %s\n", __func__);
+	return (0);
+}
+
+/* read char from the keyboard */
+static uint32_t
+kmi_read_char_locked(keyboard_t *kbd, int wait)
+{
+	struct kmi_softc *sc = kbd->kb_data;
+	uint32_t reg, data;
+
+	KMI_CTX_LOCK_ASSERT();
+
+	if (!KBD_IS_ACTIVE(kbd))
+		return (NOKEY);
+
+	reg = pl050_kmi_read_4(sc, KMIIR);
+	if (reg & KMIIR_RXINTR) {
+		data = pl050_kmi_read_4(sc, KMIDATA);
+		return (data);
+	}
+
+	++kbd->kb_count;
+	return (NOKEY);
+}
+
+/* Currently wait is always false. */
+static uint32_t
+kmi_read_char(keyboard_t *kbd, int wait)
+{
+	uint32_t keycode;
+
+	KMI_LOCK();
+	keycode = kmi_read_char_locked(kbd, wait);
+	KMI_UNLOCK();
+
+	return (keycode);
+}
+
+/* some useful control functions */
+static int
+kmi_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg)
+{
+	struct kmi_softc *sc = kbd->kb_data;
+	int i;
+#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
+    defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
+	int ival;
+
+#endif
+
+	KMI_LOCK_ASSERT();
+
+	switch (cmd) {
+	case KDGKBMODE:		/* get keyboard mode */
+		*(int *)arg = sc->sc_mode;
+		break;
+#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
+    defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
+	case _IO('K', 7):
+		ival = IOCPARM_IVAL(arg);
+		arg = (caddr_t)&ival;
+		/* FALLTHROUGH */
+#endif
+	case KDSKBMODE:		/* set keyboard mode */
+		switch (*(int *)arg) {
+		case K_XLATE:
+			if (sc->sc_mode != K_XLATE) {
+				/* make lock key state and LED state match */
+				sc->sc_state &= ~LOCK_MASK;
+				sc->sc_state |= KBD_LED_VAL(kbd);
+			}
+			/* FALLTHROUGH */
+		case K_RAW:
+		case K_CODE:
+			if (sc->sc_mode != *(int *)arg) {
+				if ((sc->sc_flags & KMI_FLAG_POLLING) == 0)
+					kmi_clear_state(kbd);
+				sc->sc_mode = *(int *)arg;
+			}
+			break;
+		default:
+			return (EINVAL);
+		}
+		break;
+
+	case KDGETLED:			/* get keyboard LED */
+		*(int *)arg = KBD_LED_VAL(kbd);
+		break;
+#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
+    defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
+	case _IO('K', 66):
+		ival = IOCPARM_IVAL(arg);
+		arg = (caddr_t)&ival;
+		/* FALLTHROUGH */
+#endif
+	case KDSETLED:			/* set keyboard LED */
+		/* NOTE: lock key state in "sc_state" won't be changed */
+		if (*(int *)arg & ~LOCK_MASK)
+			return (EINVAL);
+
+		i = *(int *)arg;
+
+		/* replace CAPS LED with ALTGR LED for ALTGR keyboards */
+		if (sc->sc_mode == K_XLATE &&
+		    kbd->kb_keymap->n_keys > ALTGR_OFFSET) {
+			if (i & ALKED)
+				i |= CLKED;
+			else
+				i &= ~CLKED;
+		}
+		if (KBD_HAS_DEVICE(kbd))
+			kmi_set_leds(sc, i);
+
+		KBD_LED_VAL(kbd) = *(int *)arg;
+		break;
+	case KDGKBSTATE:		/* get lock key state */
+		*(int *)arg = sc->sc_state & LOCK_MASK;
+		break;
+#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
+    defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
+	case _IO('K', 20):
+		ival = IOCPARM_IVAL(arg);
+		arg = (caddr_t)&ival;
+		/* FALLTHROUGH */
+#endif
+	case KDSKBSTATE:		/* set lock key state */
+		if (*(int *)arg & ~LOCK_MASK) {
+			return (EINVAL);
+		}
+		sc->sc_state &= ~LOCK_MASK;
+		sc->sc_state |= *(int *)arg;
+
+		/* set LEDs and quit */
+		return (kmi_ioctl(kbd, KDSETLED, arg));
+
+	case KDSETREPEAT:		/* set keyboard repeat rate (new
+					 * interface) */
+		if (!KBD_HAS_DEVICE(kbd)) {
+			return (0);
+		}
+		if (((int *)arg)[1] < 0) {
+			return (EINVAL);
+		}
+		if (((int *)arg)[0] < 0) {
+			return (EINVAL);
+		}
+		if (((int *)arg)[0] < 200)	/* fastest possible value */
+			kbd->kb_delay1 = 200;
+		else
+			kbd->kb_delay1 = ((int *)arg)[0];
+		kbd->kb_delay2 = ((int *)arg)[1];
+		return (0);
+
+#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
+    defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
+	case _IO('K', 67):
+		ival = IOCPARM_IVAL(arg);
+		arg = (caddr_t)&ival;
+		/* FALLTHROUGH */
+#endif
+	case KDSETRAD:			/* set keyboard repeat rate (old
+					 * interface) */
+		return (kmi_set_typematic(kbd, *(int *)arg));
+
+	case PIO_KEYMAP:		/* set keyboard translation table */
+	case OPIO_KEYMAP:		/* set keyboard translation table
+					 * (compat) */
+	case PIO_KEYMAPENT:		/* set keyboard translation table
+					 * entry */
+	case PIO_DEADKEYMAP:		/* set accent key translation table */
+		sc->sc_accents = 0;
+		/* FALLTHROUGH */
+	default:
+		return (genkbd_commonioctl(kbd, cmd, arg));
+	}
+
+	return (0);
+}
+
+static int
+kmi_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
+{
+	int result;
+
+	/*
+	 * XXX KDGKBSTATE, KDSKBSTATE and KDSETLED can be called from any
+	 * context where printf(9) can be called, which among other things
+	 * includes interrupt filters and threads with any kinds of locks
+	 * already held.  For this reason it would be dangerous to acquire
+	 * the Giant here unconditionally.  On the other hand we have to
+	 * have it to handle the ioctl.
+	 * So we make our best effort to auto-detect whether we can grab
+	 * the Giant or not.  Blame syscons(4) for this.
+	 */
+	switch (cmd) {
+	case KDGKBSTATE:
+	case KDSKBSTATE:
+	case KDSETLED:
+		if (!mtx_owned(&Giant) && !SCHEDULER_STOPPED())
+			return (EDEADLK);	/* best I could come up with */
+		/* FALLTHROUGH */
+	default:
+		KMI_LOCK();
+		result = kmi_ioctl_locked(kbd, cmd, arg);
+		KMI_UNLOCK();
+		return (result);
+	}
+}
+
+
+/* clear the internal state of the keyboard */
+static void
+kmi_clear_state(keyboard_t *kbd)
+{
+	struct kmi_softc *sc = kbd->kb_data;
+
+	KMI_CTX_LOCK_ASSERT();
+
+	sc->sc_flags &= ~(KMI_FLAG_COMPOSE | KMI_FLAG_POLLING);
+	sc->sc_state &= LOCK_MASK;	/* preserve locking key state */
+	sc->sc_accents = 0;
+}
+
+/* save the internal state, not used */
+static int
+kmi_get_state(keyboard_t *kbd, void *buf, size_t len)
+{
+	return (len == 0) ? 1 : -1;
+}
+
+/* set the internal state, not used */
+static int
+kmi_set_state(keyboard_t *kbd, void *buf, size_t len)
+{
+	return (EINVAL);
+}
+
+static int
+kmi_poll(keyboard_t *kbd, int on)
+{
+	struct kmi_softc *sc = kbd->kb_data;
+
+	KMI_LOCK();
+	if (on) {
+		sc->sc_flags |= KMI_FLAG_POLLING;
+		sc->sc_poll_thread = curthread;
+	} else {
+		sc->sc_flags &= ~KMI_FLAG_POLLING;
+	}
+	KMI_UNLOCK();
+
+	return (0);
+}
+
+/* local functions */
+
+static void
+kmi_set_leds(struct kmi_softc *sc, uint8_t leds)
+{
+
+	KMI_LOCK_ASSERT();
+
+	/* start transfer, if not already started */
+	printf("Implement me: %s\n", __func__);
+}
+
+static int
+kmi_set_typematic(keyboard_t *kbd, int code)
+{
+	static const int delays[] = {250, 500, 750, 1000};
+	static const int rates[] = {34, 38, 42, 46, 50, 55, 59, 63,
+		68, 76, 84, 92, 100, 110, 118, 126,
+		136, 152, 168, 184, 200, 220, 236, 252,
+	272, 304, 336, 368, 400, 440, 472, 504};
+
+	if (code & ~0x7f) {
+		return (EINVAL);
+	}
+	kbd->kb_delay1 = delays[(code >> 5) & 3];
+	kbd->kb_delay2 = rates[code & 0x1f];
+	return (0);
+}
+
+static keyboard_switch_t kmisw = {
+	.probe = &kmi_probe,
+	.init = &kmi_init,
+	.term = &kmi_term,
+	.intr = &kmi_intr,
+	.test_if = &kmi_test_if,
+	.enable = &kmi_enable,
+	.disable = &kmi_disable,
+	.read = &kmi_read,
+	.check = &kmi_check,
+	.read_char = &kmi_read_char,
+	.check_char = &kmi_check_char,
+	.ioctl = &kmi_ioctl,
+	.lock = &kmi_lock,
+	.clear_state = &kmi_clear_state,
+	.get_state = &kmi_get_state,
+	.set_state = &kmi_set_state,
+	.get_fkeystr = &genkbd_get_fkeystr,
+	.poll = &kmi_poll,
+	.diag = &genkbd_diag,
+};
+
+KEYBOARD_DRIVER(kmi, kmisw, kmi_configure);
+
+static void
+pl050_kmi_intr(void *arg)
+{
+	struct kmi_softc *sc = arg;
+	uint32_t c;
+
+	KMI_CTX_LOCK_ASSERT();
+
+	if ((sc->sc_flags & KMI_FLAG_POLLING) != 0)
+		return;
+
+	if (KBD_IS_ACTIVE(&sc->sc_kbd) &&
+	    KBD_IS_BUSY(&sc->sc_kbd)) {
+		/* let the callback function process the input */
+		(sc->sc_kbd.kb_callback.kc_func) (&sc->sc_kbd, KBDIO_KEYINPUT,
+		    sc->sc_kbd.kb_callback.kc_arg);
+	} else {
+		/* read and discard the input, no one is waiting for it */
+		do {
+			c = kmi_read_char_locked(&sc->sc_kbd, 0);
+		} while (c != NOKEY);
+	}
+
+}
+
+static int
+pl050_kmi_probe(device_t dev)
+{
+
+	if (ofw_bus_is_compatible(dev, "arm,pl050")) {
+		device_set_desc(dev, "PL050 Keyboard/Mouse Interface");
+		return (BUS_PROBE_DEFAULT);
+	}
+
+	return (ENXIO);
+}
+
+static int
+pl050_kmi_attach(device_t dev)
+{
+	struct kmi_softc *sc = device_get_softc(dev);
+	keyboard_t *kbd;
+	int rid;
+	int i;
+
+	kbd = &sc->sc_kbd;
+	rid = 0;
+
+	sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
+	if (sc->sc_mem_res == NULL) {
+		device_printf(dev, "could not allocate memory resource\n");
+		return (ENXIO);
+	}
+
+	/* Request the IRQ resources */
+	sc->sc_irq_res =  bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
+	if (sc->sc_irq_res == NULL) {
+		device_printf(dev, "Error: could not allocate irq resources\n");
+		return (ENXIO);
+	}
+
+	/* Setup and enable the timer */
+	if (bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_CLK,
+			NULL, pl050_kmi_intr, sc,
+			&sc->sc_intr_hl) != 0) {
+		bus_release_resource(dev, SYS_RES_IRQ, rid,
+			sc->sc_irq_res);
+		device_printf(dev, "Unable to setup the clock irq handler.\n");
+		return (ENXIO);
+	}
+
+	/* TODO: clock & divisor */
+
+	pl050_kmi_write_4(sc, KMICR, KMICR_EN | KMICR_RXINTREN);
+
+	kbd_init_struct(kbd, KMI_DRIVER_NAME, KB_OTHER, 
+			device_get_unit(dev), 0, 0, 0);
+	kbd->kb_data = (void *)sc;
+
+	sc->sc_keymap = key_map;
+	sc->sc_accmap = accent_map;
+	for (i = 0; i < KMI_NFKEY; i++) {
+		sc->sc_fkeymap[i] = fkey_tab[i];
+	}
+
+	kbd_set_maps(kbd, &sc->sc_keymap, &sc->sc_accmap,
+	    sc->sc_fkeymap, KMI_NFKEY);
+
+	KBD_FOUND_DEVICE(kbd);
+	kmi_clear_state(kbd);
+	KBD_PROBE_DONE(kbd);
+
+	KBD_INIT_DONE(kbd);
+
+	if (kbd_register(kbd) < 0) {
+		goto detach;
+	}
+	KBD_CONFIG_DONE(kbd);
+
+#ifdef KBD_INSTALL_CDEV
+	if (kbd_attach(kbd)) {
+		goto detach;
+	}
+#endif
+
+	if (bootverbose) {
+		genkbd_diag(kbd, bootverbose);
+	}
+	return (0);
+
+detach:
+	return (ENXIO);
+
+}
+
+static device_method_t pl050_kmi_methods[] = {
+	DEVMETHOD(device_probe,		pl050_kmi_probe),
+	DEVMETHOD(device_attach,	pl050_kmi_attach),
+	{ 0, 0 }
+};
+
+static driver_t pl050_kmi_driver = {
+	"kmi",
+	pl050_kmi_methods,
+	sizeof(struct kmi_softc),
+};
+
+static devclass_t pl050_kmi_devclass;
+
+DRIVER_MODULE(pl050_kmi, simplebus, pl050_kmi_driver, pl050_kmi_devclass, 0, 0);