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hvkbd.c revision 1.6 
      1 /*	$NetBSD: hvkbd.c,v 1.6 2019/11/22 12:40:07 nonaka Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2017 Microsoft Corp.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice unmodified, this list of conditions, and the following
     12  *    disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  *
     28  * $FreeBSD: head/sys/dev/hyperv/input/hv_kbd.c 317821 2017-05-05 03:28:30Z sephe $
     29  * $FreeBSD: head/sys/dev/hyperv/input/hv_kbdc.c 320490 2017-06-30 03:01:22Z sephe $
     30  * $FreeBSD: head/sys/dev/hyperv/input/hv_kbdc.h 316515 2017-04-05 05:01:23Z sephe $
     31  */
     32 
     33 #ifdef _KERNEL_OPT
     34 #include "opt_pckbd_layout.h"
     35 #include "opt_wsdisplay_compat.h"
     36 #endif /* _KERNEL_OPT */
     37 
     38 #include <sys/cdefs.h>
     39 __KERNEL_RCSID(0, "$NetBSD: hvkbd.c,v 1.6 2019/11/22 12:40:07 nonaka Exp $");
     40 
     41 #include <sys/param.h>
     42 #include <sys/systm.h>
     43 #include <sys/device.h>
     44 #include <sys/mutex.h>
     45 #include <sys/kernel.h>
     46 #include <sys/kmem.h>
     47 #include <sys/module.h>
     48 #include <sys/pmf.h>
     49 #include <sys/proc.h>
     50 #include <sys/queue.h>
     51 
     52 #include <dev/hyperv/vmbusvar.h>
     53 #include <dev/hyperv/hvkbdvar.h>
     54 
     55 #include <dev/wscons/wsconsio.h>
     56 #include <dev/wscons/wskbdvar.h>
     57 #include <dev/wscons/wsksymdef.h>
     58 #include <dev/wscons/wsksymvar.h>
     59 #include <dev/pckbport/wskbdmap_mfii.h>
     60 
     61 #define HVKBD_BUFSIZE		(4 * PAGE_SIZE)
     62 #define HVKBD_TX_RING_SIZE	(10 * PAGE_SIZE)
     63 #define HVKBD_RX_RING_SIZE	(10 * PAGE_SIZE)
     64 
     65 #define HVKBD_VER_MAJOR		(1)
     66 #define HVKBD_VER_MINOR		(0)
     67 #define HVKBD_VERSION		((HVKBD_VER_MAJOR << 16) | HVKBD_VER_MINOR)
     68 
     69 enum hvkbd_msg_type {
     70 	HVKBD_PROTO_REQUEST		= 1,
     71 	HVKBD_PROTO_RESPONSE		= 2,
     72 	HVKBD_PROTO_EVENT		= 3,
     73 	HVKBD_PROTO_LED_INDICATORS	= 4
     74 };
     75 
     76 struct hvkbd_msg_hdr {
     77 	uint32_t		type;
     78 } __packed;
     79 
     80 struct hvkbd_proto_req {
     81 	struct hvkbd_msg_hdr	hdr;
     82 	uint32_t		ver;
     83 } __packed;
     84 
     85 struct hvkbd_proto_resp {
     86 	struct hvkbd_msg_hdr	hdr;
     87 	uint32_t		status;
     88 #define	RESP_STATUS_ACCEPTED	__BIT(0)
     89 } __packed;
     90 
     91 struct keystroke {
     92 	uint16_t		makecode;
     93 	uint16_t		pad0;
     94 	uint32_t		info;
     95 #define KS_INFO_UNICODE		__BIT(0)
     96 #define KS_INFO_BREAK		__BIT(1)
     97 #define KS_INFO_E0		__BIT(2)
     98 #define KS_INFO_E1		__BIT(3)
     99 } __packed;
    100 
    101 struct hvkbd_keystroke {
    102 	struct hvkbd_msg_hdr	hdr;
    103 	struct keystroke	ks;
    104 } __packed;
    105 
    106 struct hvkbd_keystroke_info {
    107 	LIST_ENTRY(hvkbd_keystroke_info)	link;
    108 	STAILQ_ENTRY(hvkbd_keystroke_info)	slink;
    109 	struct keystroke			ks;
    110 };
    111 
    112 #define	HVKBD_KEYBUF_SIZE	16
    113 
    114 struct hvkbd_softc {
    115 	device_t				sc_dev;
    116 
    117 	struct vmbus_channel    		*sc_chan;
    118 	void					*sc_buf;
    119 
    120 	kmutex_t				sc_ks_lock;
    121 	LIST_HEAD(, hvkbd_keystroke_info)	sc_ks_free;
    122 	STAILQ_HEAD(, hvkbd_keystroke_info)	sc_ks_queue;
    123 
    124 	int					sc_enabled;
    125 	int					sc_polling;
    126 	int					sc_console_keyboard;
    127 #if defined(WSDISPLAY_COMPAT_RAWKBD)
    128 	int					sc_rawkbd;
    129 #endif
    130 
    131 	int					sc_connected;
    132 	uint32_t				sc_connect_status;
    133 
    134 	device_t				sc_wskbddev;
    135 };
    136 
    137 static int	hvkbd_match(device_t, cfdata_t, void *);
    138 static void	hvkbd_attach(device_t, device_t, void *);
    139 
    140 CFATTACH_DECL_NEW(hvkbd, sizeof(struct hvkbd_softc),
    141     hvkbd_match, hvkbd_attach, NULL, NULL);
    142 
    143 static int	hvkbd_alloc_keybuf(struct hvkbd_softc *);
    144 static void	hvkbd_free_keybuf(struct hvkbd_softc *);
    145 
    146 static int	hvkbd_enable(void *, int);
    147 static void	hvkbd_set_leds(void *, int);
    148 static int	hvkbd_ioctl(void *, u_long, void *, int, struct lwp *);
    149 
    150 static const struct wskbd_accessops hvkbd_accessops = {
    151 	hvkbd_enable,
    152 	hvkbd_set_leds,
    153 	hvkbd_ioctl,
    154 };
    155 
    156 static const struct wskbd_mapdata hvkbd_keymapdata = {
    157 	pckbd_keydesctab,
    158 #if defined(PCKBD_LAYOUT)
    159 	PCKBD_LAYOUT,
    160 #else
    161 	KB_US,
    162 #endif
    163 };
    164 
    165 static int	hvkbd_connect(struct hvkbd_softc *);
    166 static void	hvkbd_intr(void *);
    167 
    168 static void	hvkbd_cngetc(void *, u_int *, int *);
    169 static void	hvkbd_cnpollc(void *, int);
    170 
    171 static const struct wskbd_consops hvkbd_consops = {
    172 	.getc =  hvkbd_cngetc,
    173 	.pollc = hvkbd_cnpollc,
    174 	.bell =  NULL,
    175 };
    176 
    177 static int	hvkbd_is_console;
    178 
    179 static int
    180 hvkbd_match(device_t parent, cfdata_t cf, void *aux)
    181 {
    182 	struct vmbus_attach_args *aa = aux;
    183 
    184 	if (memcmp(aa->aa_type, &hyperv_guid_kbd, sizeof(*aa->aa_type)) != 0)
    185 		return 0;
    186 
    187 	/* If hvkbd(4) is not console, we use pckbd(4) in Gen.1 VM. */
    188 	if (!hvkbd_is_console && hyperv_is_gen1())
    189 		return 0;
    190 
    191 	return 1;
    192 }
    193 
    194 static void
    195 hvkbd_attach(device_t parent, device_t self, void *aux)
    196 {
    197 	struct hvkbd_softc *sc = device_private(self);
    198 	struct vmbus_attach_args *aa = aux;
    199 	struct wskbddev_attach_args a;
    200 
    201 	sc->sc_dev = self;
    202 	sc->sc_chan = aa->aa_chan;
    203 
    204 	aprint_naive("\n");
    205 	aprint_normal(": Hyper-V Synthetic Keyboard\n");
    206 
    207 	mutex_init(&sc->sc_ks_lock, MUTEX_DEFAULT, IPL_TTY);
    208 	LIST_INIT(&sc->sc_ks_free);
    209 	STAILQ_INIT(&sc->sc_ks_queue);
    210 	hvkbd_alloc_keybuf(sc);
    211 
    212 	sc->sc_buf = kmem_zalloc(HVKBD_BUFSIZE, KM_SLEEP);
    213 
    214 	sc->sc_chan->ch_flags &= ~CHF_BATCHED;
    215 	if (vmbus_channel_open(sc->sc_chan,
    216 	    HVKBD_TX_RING_SIZE + HVKBD_RX_RING_SIZE, NULL, 0, hvkbd_intr, sc)) {
    217 		aprint_error_dev(self, "failed to open channel\n");
    218 		goto free_buf;
    219 	}
    220 
    221 	if (hvkbd_connect(sc))
    222 		goto free_buf;
    223 
    224 	if (!pmf_device_register(self, NULL, NULL))
    225 		aprint_error_dev(self, "couldn't establish power handler\n");
    226 
    227 	sc->sc_console_keyboard = hvkbd_is_console;
    228 	if (hvkbd_is_console)
    229 		hvkbd_is_console = 0;
    230 
    231 	if (sc->sc_console_keyboard) {
    232 		wskbd_cnattach(&hvkbd_consops, sc, &hvkbd_keymapdata);
    233 		hvkbd_enable(sc, 1);
    234 	}
    235 
    236 	a.console = sc->sc_console_keyboard;
    237 	a.keymap = &hvkbd_keymapdata;
    238 	a.accessops = &hvkbd_accessops;
    239 	a.accesscookie = sc;
    240 	sc->sc_wskbddev = config_found(self, &a, wskbddevprint);
    241 	return;
    242 
    243 free_buf:
    244 	if (sc->sc_buf != NULL) {
    245 		kmem_free(sc->sc_buf, HVKBD_BUFSIZE);
    246 		sc->sc_buf = NULL;
    247 	}
    248 	hvkbd_free_keybuf(sc);
    249 }
    250 
    251 static int
    252 hvkbd_alloc_keybuf(struct hvkbd_softc *sc)
    253 {
    254 	struct hvkbd_keystroke_info *ksi;
    255 	int i;
    256 
    257 	for (i = 0; i < HVKBD_KEYBUF_SIZE; i++) {
    258 		ksi = kmem_zalloc(sizeof(*ksi), KM_SLEEP);
    259 		LIST_INSERT_HEAD(&sc->sc_ks_free, ksi, link);
    260 	}
    261 
    262 	return 0;
    263 }
    264 
    265 static void
    266 hvkbd_free_keybuf(struct hvkbd_softc *sc)
    267 {
    268 	struct hvkbd_keystroke_info *ksi;
    269 
    270 	while ((ksi = STAILQ_FIRST(&sc->sc_ks_queue)) != NULL) {
    271 		STAILQ_REMOVE(&sc->sc_ks_queue, ksi, hvkbd_keystroke_info,
    272 		    slink);
    273 		kmem_free(ksi, sizeof(*ksi));
    274 	}
    275 	while ((ksi = LIST_FIRST(&sc->sc_ks_free)) != NULL) {
    276 		LIST_REMOVE(ksi, link);
    277 		kmem_free(ksi, sizeof(*ksi));
    278 	}
    279 }
    280 
    281 int
    282 hvkbd_enable(void *v, int on)
    283 {
    284 	struct hvkbd_softc *sc = v;
    285 
    286 	sc->sc_enabled = on;
    287 
    288 	return 0;
    289 }
    290 
    291 static void
    292 hvkbd_set_leds(void *v, int leds)
    293 {
    294 }
    295 
    296 static int
    297 hvkbd_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
    298 {
    299 #if defined(WSDISPLAY_COMPAT_RAWKBD)
    300 	struct hvkbd_softc *sc = v;
    301 #endif
    302 
    303 	switch (cmd) {
    304 	case WSKBDIO_GTYPE:
    305 		*(int *)data = WSKBD_TYPE_HYPERV;
    306 		return 0;
    307 
    308 	case WSKBDIO_SETLEDS:
    309 		hvkbd_set_leds(v, *(int *)data);
    310 		return 0;
    311 
    312 	case WSKBDIO_GETLEDS:
    313 		*(int *)data = 0;
    314 		return 0;
    315 
    316 #if defined(WSDISPLAY_COMPAT_RAWKBD)
    317 	case WSKBDIO_SETMODE:
    318 		sc->sc_rawkbd = (*(int *)data == WSKBD_RAW);
    319 		return 0;
    320 #endif
    321 	}
    322 
    323 	return EPASSTHROUGH;
    324 }
    325 
    326 static int
    327 hvkbd_connect(struct hvkbd_softc *sc)
    328 {
    329 	struct hvkbd_proto_req req;
    330 	int timo = 100;
    331 	int error, s;
    332 
    333 	sc->sc_connected = 0;
    334 
    335 	memset(&req, 0, sizeof(req));
    336 	req.hdr.type = HVKBD_PROTO_REQUEST;
    337 	req.ver = HVKBD_VERSION;
    338 	error = vmbus_channel_send(sc->sc_chan, &req, sizeof(req),
    339 	    0, VMBUS_CHANPKT_TYPE_INBAND, VMBUS_CHANPKT_FLAG_RC);
    340 	if (error) {
    341 		aprint_error_dev(sc->sc_dev, "failed to send connect: %d\n",
    342 		    error);
    343 		return error;
    344 	}
    345 
    346 	do {
    347 		if (cold) {
    348 			delay(1000);
    349 			s = spltty();
    350 			hvkbd_intr(sc);
    351 			splx(s);
    352 		} else
    353 			tsleep(sc, PRIBIO | PCATCH, "hvkbdcon", mstohz(1));
    354 	} while (--timo > 0 && sc->sc_connected == 0);
    355 
    356 	if (timo == 0 && sc->sc_connected == 0) {
    357 		aprint_error_dev(sc->sc_dev, "connect timed out\n");
    358 		return ETIMEDOUT;
    359 	}
    360 
    361 	if (!(sc->sc_connect_status & RESP_STATUS_ACCEPTED)) {
    362 		aprint_error_dev(sc->sc_dev, "protocol request failed\n");
    363 		return ENODEV;
    364 	}
    365 
    366 	return 0;
    367 }
    368 
    369 static int
    370 hvkbd_keybuf_add_keystroke(struct hvkbd_softc *sc, const struct keystroke *ks)
    371 {
    372 	struct hvkbd_keystroke_info *ksi;
    373 
    374 	mutex_enter(&sc->sc_ks_lock);
    375 	ksi = LIST_FIRST(&sc->sc_ks_free);
    376 	if (ksi != NULL) {
    377 		LIST_REMOVE(ksi, link);
    378 		ksi->ks = *ks;
    379 		STAILQ_INSERT_TAIL(&sc->sc_ks_queue, ksi, slink);
    380 	}
    381 	mutex_exit(&sc->sc_ks_lock);
    382 
    383 	return (ksi != NULL) ? 0 : 1;
    384 }
    385 
    386 static int
    387 hvkbd_decode(struct hvkbd_softc *sc, u_int *type, int *scancode)
    388 {
    389 	struct hvkbd_keystroke_info *ksi;
    390 	struct keystroke ks;
    391 
    392 	mutex_enter(&sc->sc_ks_lock);
    393 	ksi = STAILQ_FIRST(&sc->sc_ks_queue);
    394 	if (ksi != NULL) {
    395 		STAILQ_REMOVE_HEAD(&sc->sc_ks_queue, slink);
    396 		ks = ksi->ks;
    397 		LIST_INSERT_HEAD(&sc->sc_ks_free, ksi, link);
    398 	}
    399 	mutex_exit(&sc->sc_ks_lock);
    400 
    401 	if (ksi == NULL)
    402 		return 0;
    403 
    404 	/*
    405 	 * XXX: Hyper-V host send unicode to VM through 'Type clipboard text',
    406 	 * the mapping from unicode to scancode depends on the keymap.
    407 	 * It is so complicated that we do not plan to support it yet.
    408 	 */
    409 	if (ks.info & KS_INFO_UNICODE)
    410 		return 0;
    411 
    412 	*type = (ks.info & KS_INFO_BREAK) ?
    413 	    WSCONS_EVENT_KEY_UP : WSCONS_EVENT_KEY_DOWN;
    414 	*scancode = ks.makecode;
    415 	return 1;
    416 }
    417 
    418 #if defined(WSDISPLAY_COMPAT_RAWKBD)
    419 static int
    420 hvkbd_encode(struct hvkbd_softc *sc, u_char *buf, int *len)
    421 {
    422 	struct hvkbd_keystroke_info *ksi;
    423 	struct keystroke ks;
    424 	int i;
    425 
    426 	mutex_enter(&sc->sc_ks_lock);
    427 	ksi = STAILQ_FIRST(&sc->sc_ks_queue);
    428 	if (ksi != NULL) {
    429 		STAILQ_REMOVE_HEAD(&sc->sc_ks_queue, slink);
    430 		ks = ksi->ks;
    431 		LIST_INSERT_HEAD(&sc->sc_ks_free, ksi, link);
    432 	}
    433 	mutex_exit(&sc->sc_ks_lock);
    434 
    435 	if (ksi == NULL)
    436 		return 0;
    437 
    438 	/*
    439 	 * XXX: Hyper-V host send unicode to VM through 'Type clipboard text',
    440 	 * the mapping from unicode to scancode depends on the keymap.
    441 	 * It is so complicated that we do not plan to support it yet.
    442 	 */
    443 	if (ks.info & KS_INFO_UNICODE)
    444 		return 0;
    445 
    446 	i = 0;
    447 	if (ks.info & (KS_INFO_E0|KS_INFO_E1)) {
    448 		if (ks.info & KS_INFO_E0)
    449 			buf[i++] = 0xe0;
    450 		else
    451 			buf[i++] = 0xe1;
    452 	}
    453 	if (ks.info & KS_INFO_BREAK)
    454 		buf[i++] = (u_char)ks.makecode & 0x80;
    455 	else
    456 		buf[i++] = (u_char)ks.makecode;
    457 
    458 	KDASSERT(i <= *len);
    459 	*len = i;
    460 
    461 	return 1;
    462 }
    463 #endif
    464 
    465 static void
    466 hvkbd_intr(void *xsc)
    467 {
    468 	struct hvkbd_softc *sc = xsc;
    469 	struct vmbus_chanpkt_hdr *cph;
    470 	const struct hvkbd_msg_hdr *hdr;
    471 	const struct hvkbd_proto_resp *rsp;
    472 	const struct hvkbd_keystroke *ks;
    473 	uint64_t rid;
    474 	uint32_t rlen;
    475 	u_int type;
    476 	int key, error;
    477 
    478 	for (;;) {
    479 		error = vmbus_channel_recv(sc->sc_chan, sc->sc_buf,
    480 		    HVKBD_BUFSIZE, &rlen, &rid, 1);
    481 		if (error != 0 || rlen == 0) {
    482 			if (error != EAGAIN)
    483 				device_printf(sc->sc_dev,
    484 				    "failed to receive a reply packet\n");
    485 			return;
    486 		}
    487 
    488 		cph = (struct vmbus_chanpkt_hdr *)sc->sc_buf;
    489 		switch (cph->cph_type) {
    490 		case VMBUS_CHANPKT_TYPE_INBAND:
    491 			hdr = VMBUS_CHANPKT_CONST_DATA(cph);
    492 			if (rlen < sizeof(*hdr)) {
    493 				device_printf(sc->sc_dev, "Illegal packet\n");
    494 				continue;
    495 			}
    496 
    497 			switch (hdr->type) {
    498 			case HVKBD_PROTO_RESPONSE:
    499 				if (!sc->sc_connected) {
    500 					rsp = VMBUS_CHANPKT_CONST_DATA(cph);
    501 					if (rlen < sizeof(*rsp)) {
    502 						device_printf(sc->sc_dev,
    503 						    "Illegal resp packet\n");
    504 						break;
    505 					}
    506 					sc->sc_connect_status = rsp->status;
    507 					sc->sc_connected = 1;
    508 					wakeup(sc);
    509 				}
    510 				break;
    511 
    512 			case HVKBD_PROTO_EVENT:
    513 				if (sc->sc_wskbddev == NULL || !sc->sc_enabled)
    514 					break;
    515 
    516 				ks = VMBUS_CHANPKT_CONST_DATA(cph);
    517 				hvkbd_keybuf_add_keystroke(sc, &ks->ks);
    518 				if (sc->sc_polling)
    519 					break;
    520 
    521 #if defined(WSDISPLAY_COMPAT_RAWKBD)
    522 				if (sc->sc_rawkbd) {
    523 					u_char buf[2];
    524 					int len;
    525 
    526 					len = sizeof(buf);
    527 					if (hvkbd_encode(sc, buf, &len)) {
    528 						wskbd_rawinput(sc->sc_wskbddev,
    529 						    buf, len);
    530 					}
    531 					break;
    532 				}
    533 #endif
    534 				if (hvkbd_decode(sc, &type, &key))
    535 					wskbd_input(sc->sc_wskbddev, type, key);
    536 				break;
    537 
    538 			case HVKBD_PROTO_REQUEST:
    539 			case HVKBD_PROTO_LED_INDICATORS:
    540 				device_printf(sc->sc_dev,
    541 				    "unhandled message: %d\n", hdr->type);
    542 				break;
    543 
    544 			default:
    545 				device_printf(sc->sc_dev,
    546 				    "unknown message: %d\n", hdr->type);
    547 				break;
    548 			}
    549 			break;
    550 
    551 		case VMBUS_CHANPKT_TYPE_COMP:
    552 		case VMBUS_CHANPKT_TYPE_RXBUF:
    553 			device_printf(sc->sc_dev, "unhandled event: %d\n",
    554 			    cph->cph_type);
    555 			break;
    556 
    557 		default:
    558 			device_printf(sc->sc_dev, "unknown event: %d\n",
    559 			    cph->cph_type);
    560 			break;
    561 		}
    562 	}
    563 }
    564 
    565 int
    566 hvkbd_cnattach(void)
    567 {
    568 
    569 	hvkbd_is_console = 1;
    570 
    571 	return 0;
    572 }
    573 
    574 static void
    575 hvkbd_cngetc(void *v, u_int *type, int *data)
    576 {
    577 	struct hvkbd_softc *sc = v;
    578 
    579 	while (!hvkbd_decode(sc, type, data))
    580 		hvkbd_intr(sc);
    581 }
    582 
    583 static void
    584 hvkbd_cnpollc(void *v, int on)
    585 {
    586 	struct hvkbd_softc *sc = v;
    587 
    588 	sc->sc_polling = on;
    589 }
    590 
    591 MODULE(MODULE_CLASS_DRIVER, hvkbd, "vmbus");
    592 
    593 #ifdef _MODULE
    594 #include "ioconf.c"
    595 #endif
    596 
    597 static int
    598 hvkbd_modcmd(modcmd_t cmd, void *aux)
    599 {
    600 	int error = 0;
    601 
    602 	switch (cmd) {
    603 	case MODULE_CMD_INIT:
    604 #ifdef _MODULE
    605 		error = config_init_component(cfdriver_ioconf_hvkbd,
    606 		    cfattach_ioconf_hvkbd, cfdata_ioconf_hvkbd);
    607 #endif
    608 		break;
    609 
    610 	case MODULE_CMD_FINI:
    611 #ifdef _MODULE
    612 		error = config_fini_component(cfdriver_ioconf_hvtkbd,
    613 		    cfattach_ioconf_hvkbd, cfdata_ioconf_hvkbd);
    614 #endif
    615 		break;
    616 
    617 	case MODULE_CMD_AUTOUNLOAD:
    618 		error = EBUSY;
    619 		break;
    620 
    621 	default:
    622 		error = ENOTTY;
    623 		break;
    624 	}
    625 
    626 	return error;
    627 }
    628