chrome_kb.c revision 356020 
1/*-
2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * Samsung Chromebook Keyboard
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: stable/11/sys/arm/samsung/exynos/chrome_kb.c 356020 2019-12-22 19:06:45Z kevans $");
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/bus.h>
37#include <sys/kernel.h>
38#include <sys/module.h>
39#include <sys/malloc.h>
40#include <sys/rman.h>
41#include <sys/proc.h>
42#include <sys/sched.h>
43#include <sys/kdb.h>
44#include <sys/timeet.h>
45#include <sys/timetc.h>
46#include <sys/mutex.h>
47#include <sys/gpio.h>
48
49#include <dev/ofw/openfirm.h>
50#include <dev/ofw/ofw_bus.h>
51#include <dev/ofw/ofw_bus_subr.h>
52
53#include <sys/ioccom.h>
54#include <sys/filio.h>
55#include <sys/kbio.h>
56
57#include <machine/bus.h>
58#include <machine/cpu.h>
59#include <machine/intr.h>
60
61#include "gpio_if.h"
62
63#include <arm/samsung/exynos/chrome_ec.h>
64#include <arm/samsung/exynos/chrome_kb.h>
65
66#include <arm/samsung/exynos/exynos5_combiner.h>
67#include <arm/samsung/exynos/exynos5_pad.h>
68
69#define	CKB_LOCK()	mtx_lock(&Giant)
70#define	CKB_UNLOCK()	mtx_unlock(&Giant)
71
72#ifdef	INVARIANTS
73/*
74 * Assert that the lock is held in all contexts
75 * where the code can be executed.
76 */
77#define	CKB_LOCK_ASSERT()	mtx_assert(&Giant, MA_OWNED)
78/*
79 * Assert that the lock is held in the contexts
80 * where it really has to be so.
81 */
82#define	CKB_CTX_LOCK_ASSERT()			 	\
83	do {						\
84		if (!kdb_active && panicstr == NULL)	\
85			mtx_assert(&Giant, MA_OWNED);	\
86	} while (0)
87#else
88#define CKB_LOCK_ASSERT()	(void)0
89#define CKB_CTX_LOCK_ASSERT()	(void)0
90#endif
91
92/*
93 * Define a stub keyboard driver in case one hasn't been
94 * compiled into the kernel
95 */
96#include <sys/kbio.h>
97#include <dev/kbd/kbdreg.h>
98#include <dev/kbd/kbdtables.h>
99
100#define	CKB_NFKEY		12
101#define	CKB_FLAG_COMPOSE	0x1
102#define	CKB_FLAG_POLLING	0x2
103#define	KBD_DRIVER_NAME		"ckbd"
104
105struct ckb_softc {
106	keyboard_t sc_kbd;
107	keymap_t sc_keymap;
108	accentmap_t sc_accmap;
109	fkeytab_t sc_fkeymap[CKB_NFKEY];
110
111	struct resource*	sc_mem_res;
112	struct resource*	sc_irq_res;
113	void*			sc_intr_hl;
114
115	int	sc_mode;	/* input mode (K_XLATE,K_RAW,K_CODE) */
116	int	sc_state;	/* shift/lock key state */
117	int	sc_accents;	/* accent key index (> 0) */
118	int	sc_flags;	/* flags */
119
120	struct callout		sc_repeat_callout;
121	int			sc_repeat_key;
122	int			sc_repeating;
123
124	int			flag;
125	int			rows;
126	int			cols;
127	int			gpio;
128	device_t		dev;
129	device_t		gpio_dev;
130	struct thread		*sc_poll_thread;
131	uint16_t		*keymap;
132
133	uint8_t			*scan_local;
134	uint8_t			*scan;
135};
136
137/* prototypes */
138static int	ckb_set_typematic(keyboard_t *, int);
139static uint32_t	ckb_read_char(keyboard_t *, int);
140static void	ckb_clear_state(keyboard_t *);
141static int	ckb_ioctl(keyboard_t *, u_long, caddr_t);
142static int	ckb_enable(keyboard_t *);
143static int	ckb_disable(keyboard_t *);
144
145static void
146ckb_repeat(void *arg)
147{
148	struct ckb_softc *sc;
149
150	sc = arg;
151
152	if (KBD_IS_ACTIVE(&sc->sc_kbd) && KBD_IS_BUSY(&sc->sc_kbd)) {
153		if (sc->sc_repeat_key != -1) {
154			sc->sc_repeating = 1;
155			sc->sc_kbd.kb_callback.kc_func(&sc->sc_kbd,
156			    KBDIO_KEYINPUT, sc->sc_kbd.kb_callback.kc_arg);
157		}
158	}
159}
160
161/* detect a keyboard, not used */
162static int
163ckb__probe(int unit, void *arg, int flags)
164{
165
166	return (ENXIO);
167}
168
169/* reset and initialize the device, not used */
170static int
171ckb_init(int unit, keyboard_t **kbdp, void *arg, int flags)
172{
173
174	return (ENXIO);
175}
176
177/* test the interface to the device, not used */
178static int
179ckb_test_if(keyboard_t *kbd)
180{
181
182	return (0);
183}
184
185/* finish using this keyboard, not used */
186static int
187ckb_term(keyboard_t *kbd)
188{
189
190	return (ENXIO);
191}
192
193/* keyboard interrupt routine, not used */
194static int
195ckb_intr(keyboard_t *kbd, void *arg)
196{
197
198	return (0);
199}
200
201/* lock the access to the keyboard, not used */
202static int
203ckb_lock(keyboard_t *kbd, int lock)
204{
205
206	return (1);
207}
208
209/* clear the internal state of the keyboard */
210static void
211ckb_clear_state(keyboard_t *kbd)
212{
213	struct ckb_softc *sc;
214
215	sc = kbd->kb_data;
216
217	CKB_CTX_LOCK_ASSERT();
218
219	sc->sc_flags &= ~(CKB_FLAG_COMPOSE | CKB_FLAG_POLLING);
220	sc->sc_state &= LOCK_MASK; /* preserve locking key state */
221	sc->sc_accents = 0;
222}
223
224/* save the internal state, not used */
225static int
226ckb_get_state(keyboard_t *kbd, void *buf, size_t len)
227{
228
229	return (len == 0) ? 1 : -1;
230}
231
232/* set the internal state, not used */
233static int
234ckb_set_state(keyboard_t *kbd, void *buf, size_t len)
235{
236
237	return (EINVAL);
238}
239
240
241/* check if data is waiting */
242static int
243ckb_check(keyboard_t *kbd)
244{
245	struct ckb_softc *sc;
246	int i;
247
248	sc = kbd->kb_data;
249
250	CKB_CTX_LOCK_ASSERT();
251
252	if (!KBD_IS_ACTIVE(kbd))
253		return (0);
254
255	if (sc->sc_flags & CKB_FLAG_POLLING) {
256		return (1);
257	}
258
259	for (i = 0; i < sc->cols; i++)
260		if (sc->scan_local[i] != sc->scan[i]) {
261			return (1);
262		}
263
264	if (sc->sc_repeating)
265		return (1);
266
267	return (0);
268}
269
270/* check if char is waiting */
271static int
272ckb_check_char_locked(keyboard_t *kbd)
273{
274	CKB_CTX_LOCK_ASSERT();
275
276	if (!KBD_IS_ACTIVE(kbd))
277		return (0);
278
279	return (ckb_check(kbd));
280}
281
282static int
283ckb_check_char(keyboard_t *kbd)
284{
285	int result;
286
287	CKB_LOCK();
288	result = ckb_check_char_locked(kbd);
289	CKB_UNLOCK();
290
291	return (result);
292}
293
294/* read one byte from the keyboard if it's allowed */
295/* Currently unused. */
296static int
297ckb_read(keyboard_t *kbd, int wait)
298{
299	CKB_CTX_LOCK_ASSERT();
300
301	if (!KBD_IS_ACTIVE(kbd))
302		return (-1);
303
304	printf("Implement ME: %s\n", __func__);
305	return (0);
306}
307
308static uint16_t
309keymap_read(struct ckb_softc *sc, int col, int row)
310{
311
312	KASSERT(sc->keymap != NULL, ("keymap_read: no keymap"));
313	if (col >= 0 && col < sc->cols &&
314	    row >= 0 && row < sc->rows) {
315		return sc->keymap[row * sc->cols + col];
316	}
317
318	return (0);
319}
320
321static int
322keymap_write(struct ckb_softc *sc, int col, int row, uint16_t key)
323{
324
325	KASSERT(sc->keymap != NULL, ("keymap_write: no keymap"));
326	if (col >= 0 && col < sc->cols &&
327	    row >= 0 && row < sc->rows) {
328		sc->keymap[row * sc->cols + col] = key;
329		return (0);
330	}
331
332	return (-1);
333}
334
335/* read char from the keyboard */
336static uint32_t
337ckb_read_char_locked(keyboard_t *kbd, int wait)
338{
339	struct ckb_softc *sc;
340	int i,j;
341	uint16_t key;
342	int oldbit;
343	int newbit;
344	int status;
345
346	sc = kbd->kb_data;
347
348	CKB_CTX_LOCK_ASSERT();
349
350	if (!KBD_IS_ACTIVE(kbd))
351		return (NOKEY);
352
353	if (sc->sc_repeating) {
354		sc->sc_repeating = 0;
355		callout_reset(&sc->sc_repeat_callout, hz / 10,
356                    ckb_repeat, sc);
357		return (sc->sc_repeat_key);
358	}
359
360	if (sc->sc_flags & CKB_FLAG_POLLING) {
361		for (;;) {
362			GPIO_PIN_GET(sc->gpio_dev, sc->gpio, &status);
363			if (status == 0) {
364				if (ec_command(EC_CMD_MKBP_STATE, sc->scan,
365					sc->cols,
366				    sc->scan, sc->cols)) {
367					return (NOKEY);
368				}
369				break;
370			}
371			if (!wait) {
372				return (NOKEY);
373			}
374			DELAY(1000);
375		}
376	}
377
378	for (i = 0; i < sc->cols; i++) {
379		for (j = 0; j < sc->rows; j++) {
380			oldbit = (sc->scan_local[i] & (1 << j));
381			newbit = (sc->scan[i] & (1 << j));
382
383			if (oldbit == newbit)
384				continue;
385
386			key = keymap_read(sc, i, j);
387			if (key == 0) {
388				continue;
389			}
390
391			if (newbit > 0) {
392				/* key pressed */
393				sc->scan_local[i] |= (1 << j);
394
395				/* setup repeating */
396				sc->sc_repeat_key = key;
397				callout_reset(&sc->sc_repeat_callout,
398				    hz / 2, ckb_repeat, sc);
399
400			} else {
401				/* key released */
402				sc->scan_local[i] &= ~(1 << j);
403
404				/* release flag */
405				key |= 0x80;
406
407				/* unsetup repeating */
408				sc->sc_repeat_key = -1;
409				callout_stop(&sc->sc_repeat_callout);
410			}
411
412			return (key);
413		}
414	}
415
416	return (NOKEY);
417}
418
419/* Currently wait is always false. */
420static uint32_t
421ckb_read_char(keyboard_t *kbd, int wait)
422{
423	uint32_t keycode;
424
425	CKB_LOCK();
426	keycode = ckb_read_char_locked(kbd, wait);
427	CKB_UNLOCK();
428
429	return (keycode);
430}
431
432
433/* some useful control functions */
434static int
435ckb_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg)
436{
437	struct ckb_softc *sc;
438	int i;
439
440	sc = kbd->kb_data;
441
442	CKB_LOCK_ASSERT();
443
444	switch (cmd) {
445	case KDGKBMODE:		/* get keyboard mode */
446		*(int *)arg = sc->sc_mode;
447		break;
448
449	case KDSKBMODE:		/* set keyboard mode */
450		switch (*(int *)arg) {
451		case K_XLATE:
452			if (sc->sc_mode != K_XLATE) {
453				/* make lock key state and LED state match */
454				sc->sc_state &= ~LOCK_MASK;
455				sc->sc_state |= KBD_LED_VAL(kbd);
456			}
457			/* FALLTHROUGH */
458		case K_RAW:
459		case K_CODE:
460			if (sc->sc_mode != *(int *)arg) {
461				if ((sc->sc_flags & CKB_FLAG_POLLING) == 0)
462					ckb_clear_state(kbd);
463				sc->sc_mode = *(int *)arg;
464			}
465			break;
466		default:
467			return (EINVAL);
468		}
469		break;
470
471	case KDGETLED:			/* get keyboard LED */
472		*(int *)arg = KBD_LED_VAL(kbd);
473		break;
474
475	case KDSETLED:			/* set keyboard LED */
476		/* NOTE: lock key state in "sc_state" won't be changed */
477		if (*(int *)arg & ~LOCK_MASK)
478			return (EINVAL);
479
480		i = *(int *)arg;
481
482		/* replace CAPS LED with ALTGR LED for ALTGR keyboards */
483		if (sc->sc_mode == K_XLATE &&
484		    kbd->kb_keymap->n_keys > ALTGR_OFFSET) {
485			if (i & ALKED)
486				i |= CLKED;
487			else
488				i &= ~CLKED;
489		}
490		if (KBD_HAS_DEVICE(kbd)) {
491			/* Configure LED */
492		}
493
494		KBD_LED_VAL(kbd) = *(int *)arg;
495		break;
496	case KDGKBSTATE:		/* get lock key state */
497		*(int *)arg = sc->sc_state & LOCK_MASK;
498		break;
499
500	case KDSKBSTATE:		/* set lock key state */
501		if (*(int *)arg & ~LOCK_MASK) {
502			return (EINVAL);
503		}
504		sc->sc_state &= ~LOCK_MASK;
505		sc->sc_state |= *(int *)arg;
506
507		/* set LEDs and quit */
508		return (ckb_ioctl(kbd, KDSETLED, arg));
509
510	case KDSETREPEAT:		/* set keyboard repeat rate (new
511					 * interface) */
512
513		if (!KBD_HAS_DEVICE(kbd)) {
514			return (0);
515		}
516		if (((int *)arg)[1] < 0) {
517			return (EINVAL);
518		}
519		if (((int *)arg)[0] < 0) {
520			return (EINVAL);
521		}
522		if (((int *)arg)[0] < 200)	/* fastest possible value */
523			kbd->kb_delay1 = 200;
524		else
525			kbd->kb_delay1 = ((int *)arg)[0];
526		kbd->kb_delay2 = ((int *)arg)[1];
527		return (0);
528
529	case KDSETRAD:			/* set keyboard repeat rate (old
530					 * interface) */
531		return (ckb_set_typematic(kbd, *(int *)arg));
532
533	case PIO_KEYMAP:		/* set keyboard translation table */
534	case OPIO_KEYMAP:		/* set keyboard translation table
535					 * (compat) */
536	case PIO_KEYMAPENT:		/* set keyboard translation table
537					 * entry */
538	case PIO_DEADKEYMAP:		/* set accent key translation table */
539		sc->sc_accents = 0;
540		/* FALLTHROUGH */
541	default:
542		return (genkbd_commonioctl(kbd, cmd, arg));
543	}
544
545	return (0);
546}
547
548static int
549ckb_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
550{
551	int result;
552
553	/*
554	 * XXX KDGKBSTATE, KDSKBSTATE and KDSETLED can be called from any
555	 * context where printf(9) can be called, which among other things
556	 * includes interrupt filters and threads with any kinds of locks
557	 * already held.  For this reason it would be dangerous to acquire
558	 * the Giant here unconditionally.  On the other hand we have to
559	 * have it to handle the ioctl.
560	 * So we make our best effort to auto-detect whether we can grab
561	 * the Giant or not.  Blame syscons(4) for this.
562	 */
563	switch (cmd) {
564	case KDGKBSTATE:
565	case KDSKBSTATE:
566	case KDSETLED:
567		if (!mtx_owned(&Giant) && !SCHEDULER_STOPPED())
568			return (EDEADLK);	/* best I could come up with */
569		/* FALLTHROUGH */
570	default:
571		CKB_LOCK();
572		result = ckb_ioctl_locked(kbd, cmd, arg);
573		CKB_UNLOCK();
574		return (result);
575	}
576}
577
578
579/*
580 * Enable the access to the device; until this function is called,
581 * the client cannot read from the keyboard.
582 */
583static int
584ckb_enable(keyboard_t *kbd)
585{
586
587	CKB_LOCK();
588	KBD_ACTIVATE(kbd);
589	CKB_UNLOCK();
590
591	return (0);
592}
593
594/* disallow the access to the device */
595static int
596ckb_disable(keyboard_t *kbd)
597{
598
599	CKB_LOCK();
600	KBD_DEACTIVATE(kbd);
601	CKB_UNLOCK();
602
603	return (0);
604}
605
606/* local functions */
607
608static int
609ckb_set_typematic(keyboard_t *kbd, int code)
610{
611	static const int delays[] = {250, 500, 750, 1000};
612	static const int rates[] = {34, 38, 42, 46, 50, 55, 59, 63,
613		68, 76, 84, 92, 100, 110, 118, 126,
614		136, 152, 168, 184, 200, 220, 236, 252,
615	272, 304, 336, 368, 400, 440, 472, 504};
616
617	if (code & ~0x7f) {
618		return (EINVAL);
619	}
620	kbd->kb_delay1 = delays[(code >> 5) & 3];
621	kbd->kb_delay2 = rates[code & 0x1f];
622	return (0);
623}
624
625static int
626ckb_poll(keyboard_t *kbd, int on)
627{
628	struct ckb_softc *sc;
629
630	sc = kbd->kb_data;
631
632	CKB_LOCK();
633	if (on) {
634		sc->sc_flags |= CKB_FLAG_POLLING;
635		sc->sc_poll_thread = curthread;
636	} else {
637		sc->sc_flags &= ~CKB_FLAG_POLLING;
638	}
639	CKB_UNLOCK();
640
641	return (0);
642}
643
644/* local functions */
645
646static int dummy_kbd_configure(int flags);
647
648keyboard_switch_t ckbdsw = {
649	.probe = &ckb__probe,
650	.init = &ckb_init,
651	.term = &ckb_term,
652	.intr = &ckb_intr,
653	.test_if = &ckb_test_if,
654	.enable = &ckb_enable,
655	.disable = &ckb_disable,
656	.read = &ckb_read,
657	.check = &ckb_check,
658	.read_char = &ckb_read_char,
659	.check_char = &ckb_check_char,
660	.ioctl = &ckb_ioctl,
661	.lock = &ckb_lock,
662	.clear_state = &ckb_clear_state,
663	.get_state = &ckb_get_state,
664	.set_state = &ckb_set_state,
665	.poll = &ckb_poll,
666};
667
668static int
669dummy_kbd_configure(int flags)
670{
671
672	return (0);
673}
674
675KEYBOARD_DRIVER(ckbd, ckbdsw, dummy_kbd_configure);
676
677/*
678 * Parses 'keymap' into sc->keymap.
679 * Requires sc->cols and sc->rows to be set.
680 */
681static int
682parse_keymap(struct ckb_softc *sc, pcell_t *keymap, size_t len)
683{
684	int i;
685
686	sc->keymap = malloc(sc->cols * sc->rows * sizeof(sc->keymap[0]),
687	    M_DEVBUF, M_NOWAIT | M_ZERO);
688	if (sc->keymap == NULL) {
689		return (ENOMEM);
690	}
691
692	for (i = 0; i < len; i++) {
693		/*
694		 * Return value is ignored, we just write whatever fits into
695		 * specified number of rows and columns and silently ignore
696		 * everything else.
697		 * Keymap entries follow this format: 0xRRCCKKKK
698		 * RR - row number, CC - column number, KKKK - key code
699		 */
700		keymap_write(sc, (keymap[i] >> 16) & 0xff,
701		    (keymap[i] >> 24) & 0xff,
702		    keymap[i] & 0xffff);
703	}
704
705	return (0);
706}
707
708/* Allocates a new array for keymap and returns it in 'keymap'. */
709static int
710read_keymap(phandle_t node, const char *prop, pcell_t **keymap, size_t *len)
711{
712
713	if ((*len = OF_getproplen(node, prop)) <= 0) {
714		return (ENXIO);
715	}
716	if ((*keymap = malloc(*len, M_DEVBUF, M_NOWAIT)) == NULL) {
717		return (ENOMEM);
718	}
719	if (OF_getencprop(node, prop, *keymap, *len) != *len) {
720		return (ENXIO);
721	}
722	return (0);
723}
724
725static int
726parse_dts(struct ckb_softc *sc)
727{
728	phandle_t node;
729	pcell_t dts_value;
730	pcell_t *keymap;
731	int len, ret;
732	const char *keymap_prop = NULL;
733
734	if ((node = ofw_bus_get_node(sc->dev)) == -1)
735		return (ENXIO);
736
737	if ((len = OF_getproplen(node, "google,key-rows")) <= 0)
738		return (ENXIO);
739	OF_getencprop(node, "google,key-rows", &dts_value, len);
740	sc->rows = dts_value;
741
742	if ((len = OF_getproplen(node, "google,key-columns")) <= 0)
743		return (ENXIO);
744	OF_getencprop(node, "google,key-columns", &dts_value, len);
745	sc->cols = dts_value;
746
747	if ((len = OF_getproplen(node, "freebsd,intr-gpio")) <= 0)
748		return (ENXIO);
749	OF_getencprop(node, "freebsd,intr-gpio", &dts_value, len);
750	sc->gpio = dts_value;
751
752	if (OF_hasprop(node, "freebsd,keymap")) {
753		keymap_prop = "freebsd,keymap";
754		device_printf(sc->dev, "using FreeBSD-specific keymap from FDT\n");
755	} else if (OF_hasprop(node, "linux,keymap")) {
756		keymap_prop = "linux,keymap";
757		device_printf(sc->dev, "using Linux keymap from FDT\n");
758	} else {
759		device_printf(sc->dev, "using built-in keymap\n");
760	}
761
762	if (keymap_prop != NULL) {
763		if ((ret = read_keymap(node, keymap_prop, &keymap, &len))) {
764			device_printf(sc->dev,
765			     "failed to read keymap from FDT: %d\n", ret);
766			return (ret);
767		}
768		ret = parse_keymap(sc, keymap, len);
769		free(keymap, M_DEVBUF);
770		if (ret) {
771			return (ret);
772		}
773	} else {
774		if ((ret = parse_keymap(sc, default_keymap, KEYMAP_LEN))) {
775			return (ret);
776		}
777	}
778
779	if ((sc->rows == 0) || (sc->cols == 0) || (sc->gpio == 0))
780		return (ENXIO);
781
782	return (0);
783}
784
785void
786ckb_ec_intr(void *arg)
787{
788	struct ckb_softc *sc;
789
790	sc = arg;
791
792	if (sc->sc_flags & CKB_FLAG_POLLING)
793		return;
794
795	ec_command(EC_CMD_MKBP_STATE, sc->scan, sc->cols,
796	    sc->scan, sc->cols);
797
798	(sc->sc_kbd.kb_callback.kc_func) (&sc->sc_kbd, KBDIO_KEYINPUT,
799	    sc->sc_kbd.kb_callback.kc_arg);
800};
801
802static int
803chrome_kb_attach(device_t dev)
804{
805	struct ckb_softc *sc;
806	keyboard_t *kbd;
807	int error;
808	int rid;
809	int i;
810
811	sc = device_get_softc(dev);
812
813	sc->dev = dev;
814	sc->keymap = NULL;
815
816	if ((error = parse_dts(sc)) != 0)
817		return error;
818
819	sc->gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
820	if (sc->gpio_dev == NULL) {
821		device_printf(sc->dev, "Can't find gpio device.\n");
822		return (ENXIO);
823	}
824
825#if 0
826	device_printf(sc->dev, "Keyboard matrix [%dx%d]\n",
827	    sc->cols, sc->rows);
828#endif
829
830	pad_setup_intr(sc->gpio, ckb_ec_intr, sc);
831
832	kbd = &sc->sc_kbd;
833	rid = 0;
834
835	sc->scan_local = malloc(sc->cols, M_DEVBUF, M_NOWAIT);
836	sc->scan = malloc(sc->cols, M_DEVBUF, M_NOWAIT);
837
838	for (i = 0; i < sc->cols; i++) {
839		sc->scan_local[i] = 0;
840		sc->scan[i] = 0;
841	}
842
843	kbd_init_struct(kbd, KBD_DRIVER_NAME, KB_OTHER,
844	    device_get_unit(dev), 0, 0, 0);
845	kbd->kb_data = (void *)sc;
846
847	sc->sc_keymap = key_map;
848        sc->sc_accmap = accent_map;
849	for (i = 0; i < CKB_NFKEY; i++) {
850		sc->sc_fkeymap[i] = fkey_tab[i];
851        }
852
853	kbd_set_maps(kbd, &sc->sc_keymap, &sc->sc_accmap,
854	    sc->sc_fkeymap, CKB_NFKEY);
855
856	KBD_FOUND_DEVICE(kbd);
857	ckb_clear_state(kbd);
858	KBD_PROBE_DONE(kbd);
859
860	callout_init(&sc->sc_repeat_callout, 0);
861
862	KBD_INIT_DONE(kbd);
863
864	if (kbd_register(kbd) < 0) {
865		return (ENXIO);
866	}
867	KBD_CONFIG_DONE(kbd);
868
869	return (0);
870}
871
872static int
873chrome_kb_probe(device_t dev)
874{
875
876	if (!ofw_bus_status_okay(dev))
877		return (ENXIO);
878
879	if (ofw_bus_is_compatible(dev, "google,cros-ec-keyb") ||
880	    ofw_bus_is_compatible(dev, "google,mkbp-keyb")) {
881		device_set_desc(dev, "Chrome EC Keyboard");
882		return (BUS_PROBE_DEFAULT);
883	}
884
885	return (ENXIO);
886}
887
888static int
889chrome_kb_detach(device_t dev)
890{
891	struct ckb_softc *sc;
892
893	sc = device_get_softc(dev);
894
895	if (sc->keymap != NULL) {
896		free(sc->keymap, M_DEVBUF);
897	}
898
899	return 0;
900}
901
902static device_method_t chrome_kb_methods[] = {
903	DEVMETHOD(device_probe,		chrome_kb_probe),
904	DEVMETHOD(device_attach,	chrome_kb_attach),
905	DEVMETHOD(device_detach,	chrome_kb_detach),
906	{ 0, 0 }
907};
908
909static driver_t chrome_kb_driver = {
910	"chrome_kb",
911	chrome_kb_methods,
912	sizeof(struct ckb_softc),
913};
914
915static devclass_t chrome_kb_devclass;
916
917DRIVER_MODULE(chrome_kb, simplebus, chrome_kb_driver,
918    chrome_kb_devclass, 0, 0);
919