4 * Copyright (c) 1996-1999
5 * Kazutaka YOKOTA (yokota@zodiac.mech.utsunomiya-u.ac.jp)
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following 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 * 3. The name of the author may not be used to endorse or promote
17 * products derived from this software without specific prior written
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * $FreeBSD: src/sys/dev/kbd/atkbdc.c,v 1.5.2.2 2002/03/31 11:02:02 murray Exp $
33 * from kbdio.c,v 1.13 1998/09/25 11:55:46 yokota Exp
37 #include "use_atkbdc.h"
39 #include <sys/param.h>
40 #include <sys/systm.h>
42 #include <sys/malloc.h>
43 #include <sys/syslog.h>
46 #include <machine/clock.h>
48 #include "atkbdcreg.h"
50 #include <bus/isa/isareg.h>
53 #define lwkt_gettoken(x)
54 #define lwkt_reltoken(x)
59 #define MAXKBDC MAX(NATKBDC, 1) /* XXX */
64 #define MAX(x, y) ((x) > (y) ? (x) : (y))
67 #define kbdcp(p) ((atkbdc_softc_t *)(p))
68 #define nextq(i) (((i) + 1) % KBDQ_BUFSIZE)
69 #define availq(q) ((q)->head != (q)->tail)
71 #define emptyq(q) ((q)->tail = (q)->head = (q)->qcount = 0)
73 #define emptyq(q) ((q)->tail = (q)->head = 0)
76 #define read_data(k) (bus_space_read_1((k)->iot, (k)->ioh0, 0))
77 #define read_status(k) (bus_space_read_1((k)->iot, (k)->ioh1, 0))
78 #define write_data(k, d) \
79 (bus_space_write_1((k)->iot, (k)->ioh0, 0, (d)))
80 #define write_command(k, d) \
81 (bus_space_write_1((k)->iot, (k)->ioh1, 0, (d)))
86 * We always need at least one copy of the kbdc_softc struct for the
87 * low-level console. As the low-level console accesses the keyboard
88 * controller before kbdc, and all other devices, is probed, we
89 * statically allocate one entry. XXX
91 static atkbdc_softc_t default_kbdc
;
92 static atkbdc_softc_t
*atkbdc_softc
[MAXKBDC
] = { &default_kbdc
};
94 static int verbose
= KBDIO_DEBUG
;
96 /* function prototypes */
98 static int atkbdc_setup(atkbdc_softc_t
*sc
, bus_space_tag_t tag
,
99 bus_space_handle_t h0
, bus_space_handle_t h1
);
100 static int addq(kbdkqueue
*q
, int c
);
101 static int removeq(kbdkqueue
*q
);
102 static int wait_while_controller_busy(atkbdc_softc_t
*kbdc
);
103 static int wait_for_data(atkbdc_softc_t
*kbdc
);
104 static int wait_for_kbd_data(atkbdc_softc_t
*kbdc
);
105 static int wait_for_kbd_ack(atkbdc_softc_t
*kbdc
);
106 static int wait_for_aux_data(atkbdc_softc_t
*kbdc
);
107 static int wait_for_aux_ack(atkbdc_softc_t
*kbdc
);
110 atkbdc_get_softc(int unit
)
114 if (unit
>= NELEM(atkbdc_softc
))
116 sc
= atkbdc_softc
[unit
];
118 sc
= kmalloc(sizeof(*sc
), M_DEVBUF
, M_WAITOK
| M_ZERO
);
119 atkbdc_softc
[unit
] = sc
;
125 atkbdc_probe_unit(int unit
, struct resource
*port0
, struct resource
*port1
)
127 if (rman_get_start(port0
) <= 0)
129 if (rman_get_start(port1
) <= 0)
135 atkbdc_attach_unit(int unit
, atkbdc_softc_t
*sc
, struct resource
*port0
,
136 struct resource
*port1
)
138 return atkbdc_setup(sc
, rman_get_bustag(port0
),
139 rman_get_bushandle(port0
),
140 rman_get_bushandle(port1
));
143 /* the backdoor to the keyboard controller! XXX */
145 atkbdc_configure(void)
148 bus_space_handle_t h0
;
149 bus_space_handle_t h1
;
152 #if defined(__x86_64__)
157 resource_int_value("atkbdc", 0, "port", &port0
);
158 port1
= IO_KBD
+ KBD_STATUS_PORT
;
160 resource_int_value("atkbdc", 0, "port", &port0
);
163 /* XXX: tag should be passed from the caller */
164 #if defined(__i386__)
165 tag
= I386_BUS_SPACE_IO
;
171 bus_space_map(tag
, port0
, IO_KBDSIZE
, 0, &h0
);
172 bus_space_map(tag
, port1
, IO_KBDSIZE
, 0, &h1
);
174 h0
= (bus_space_handle_t
)port0
;
175 h1
= (bus_space_handle_t
)port1
;
178 #if defined(__x86_64__)
180 * Check if we really have AT keyboard controller. Poll status
181 * register until we get "all clear" indication. If no such
182 * indication comes, it probably means that there is no AT
183 * keyboard controller present. Give up in such case. Check relies
184 * on the fact that reading from non-existing in/out port returns
185 * 0xff on i386. May or may not be true on other platforms.
187 for (i
= 65536; i
!= 0; --i
) {
188 if ((bus_space_read_1(tag
, h1
, 0) & 0x2) == 0)
196 return atkbdc_setup(atkbdc_softc
[0], tag
, h0
, h1
);
200 atkbdc_setup(atkbdc_softc_t
*sc
, bus_space_tag_t tag
, bus_space_handle_t h0
,
201 bus_space_handle_t h1
)
203 if (sc
->ioh0
== 0) { /* XXX */
204 sc
->command_byte
= -1;
206 sc
->kbd
.head
= sc
->kbd
.tail
= 0;
207 sc
->aux
.head
= sc
->aux
.tail
= 0;
209 sc
->kbd
.call_count
= 0;
210 sc
->kbd
.qcount
= sc
->kbd
.max_qcount
= 0;
211 sc
->aux
.call_count
= 0;
212 sc
->aux
.qcount
= sc
->aux
.max_qcount
= 0;
221 /* open a keyboard controller */
223 atkbdc_open(int unit
)
229 if ((atkbdc_softc
[unit
]->port0
!= NULL
)
230 || (atkbdc_softc
[unit
]->ioh0
!= 0)) /* XXX */
231 return (KBDC
)atkbdc_softc
[unit
];
236 * I/O access arbitration in `kbdio'
238 * The `kbdio' module uses a simplistic convention to arbitrate
239 * I/O access to the controller/keyboard/mouse. The convention requires
240 * close cooperation of the calling device driver.
242 * The device drivers which utilize the `kbdio' module are assumed to
243 * have the following set of routines.
244 * a. An interrupt handler (the bottom half of the driver).
245 * b. Timeout routines which may briefly poll the keyboard controller.
246 * c. Routines outside interrupt context (the top half of the driver).
247 * They should follow the rules below:
248 * 1. The interrupt handler may assume that it always has full access
249 * to the controller/keyboard/mouse.
250 * 2. The other routines must issue `spltty()' if they wish to
251 * prevent the interrupt handler from accessing
252 * the controller/keyboard/mouse.
253 * 3. The timeout routines and the top half routines of the device driver
254 * arbitrate I/O access by observing the lock flag in `kbdio'.
255 * The flag is manipulated via `kbdc_lock()'; when one wants to
256 * perform I/O, call `kbdc_lock(kbdc, TRUE)' and proceed only if
257 * the call returns with TRUE. Otherwise the caller must back off.
258 * Call `kbdc_lock(kbdc, FALSE)' when necessary I/O operaion
259 * is finished. This mechanism does not prevent the interrupt
260 * handler from being invoked at any time and carrying out I/O.
261 * Therefore, `spltty()' must be strategically placed in the device
262 * driver code. Also note that the timeout routine may interrupt
263 * `kbdc_lock()' called by the top half of the driver, but this
264 * interruption is OK so long as the timeout routine observes
266 * 4. The interrupt and timeout routines should not extend I/O operation
267 * across more than one interrupt or timeout; they must complete any
268 * necessary I/O operation within one invocation of the routine.
269 * This means that if the timeout routine acquires the lock flag,
270 * it must reset the flag to FALSE before it returns.
273 /* set/reset polling lock */
275 kbdc_lock(KBDC p
, int lock
)
279 prevlock
= kbdcp(p
)->lock
;
280 kbdcp(p
)->lock
= lock
;
282 return (prevlock
!= lock
);
285 /* check if any data is waiting to be processed */
287 kbdc_data_ready(KBDC p
)
289 return (availq(&kbdcp(p
)->kbd
) || availq(&kbdcp(p
)->aux
)
290 || (read_status(kbdcp(p
)) & KBDS_ANY_BUFFER_FULL
));
293 /* queuing functions */
296 addq(kbdkqueue
*q
, int c
)
298 if (nextq(q
->tail
) != q
->head
) {
300 q
->tail
= nextq(q
->tail
);
304 if (q
->qcount
> q
->max_qcount
)
305 q
->max_qcount
= q
->qcount
;
313 removeq(kbdkqueue
*q
)
317 if (q
->tail
!= q
->head
) {
319 q
->head
= nextq(q
->head
);
329 * device I/O routines
332 wait_while_controller_busy(struct atkbdc_softc
*kbdc
)
334 /* CPU will stay inside the loop for 100msec at most */
335 TOTALDELAY retry
= { .us
= 70000, .last_clock
=0 }; /* 70ms */
339 while ((f
= read_status(kbdc
)) & KBDS_INPUT_BUFFER_FULL
) {
340 if ((f
& KBDS_BUFFER_FULL
) == KBDS_KBD_BUFFER_FULL
) {
341 DELAY(KBDD_DELAYTIME
);
344 } else if ((f
& KBDS_BUFFER_FULL
) == KBDS_AUX_BUFFER_FULL
) {
345 DELAY(KBDD_DELAYTIME
);
349 DELAY(KBDC_DELAYTIME
);
350 if (CHECKTIMEOUT(&retry
))
357 * wait for any data; whether it's from the controller,
358 * the keyboard, or the aux device.
361 wait_for_data(struct atkbdc_softc
*kbdc
)
363 /* CPU will stay inside the loop for 200msec at most */
364 TOTALDELAY retry
= { 200000, 0 }; /* 200ms */
367 while ((f
= read_status(kbdc
) & KBDS_ANY_BUFFER_FULL
) == 0) {
368 DELAY(KBDC_DELAYTIME
);
369 if (CHECKTIMEOUT(&retry
))
372 DELAY(KBDD_DELAYTIME
);
376 /* wait for data from the keyboard */
378 wait_for_kbd_data(struct atkbdc_softc
*kbdc
)
380 /* CPU will stay inside the loop for 200msec at most */
381 TOTALDELAY retry
= { 200000, 0 }; /* 200ms */
385 while ((f
= read_status(kbdc
) & KBDS_BUFFER_FULL
)
386 != KBDS_KBD_BUFFER_FULL
) {
387 if (f
== KBDS_AUX_BUFFER_FULL
) {
388 DELAY(KBDD_DELAYTIME
);
392 DELAY(KBDC_DELAYTIME
);
393 if (CHECKTIMEOUT(&retry
))
396 DELAY(KBDD_DELAYTIME
);
401 * wait for an ACK(FAh), RESEND(FEh), or RESET_FAIL(FCh) from the keyboard.
402 * queue anything else.
405 wait_for_kbd_ack(struct atkbdc_softc
*kbdc
)
407 /* CPU will stay inside the loop for 200msec at most */
408 TOTALDELAY retry
= { 200000, 0 }; /* 200ms */
412 while (CHECKTIMEOUT(&retry
) == 0) {
413 if ((f
= read_status(kbdc
)) & KBDS_ANY_BUFFER_FULL
) {
414 DELAY(KBDD_DELAYTIME
);
416 if ((f
& KBDS_BUFFER_FULL
) == KBDS_KBD_BUFFER_FULL
) {
417 if ((b
== KBD_ACK
) || (b
== KBD_RESEND
)
418 || (b
== KBD_RESET_FAIL
))
421 } else if ((f
& KBDS_BUFFER_FULL
) == KBDS_AUX_BUFFER_FULL
) {
425 DELAY(KBDC_DELAYTIME
);
430 /* wait for data from the aux device */
432 wait_for_aux_data(struct atkbdc_softc
*kbdc
)
434 /* CPU will stay inside the loop for 200msec at most */
435 TOTALDELAY retry
= { 200000, 0 }; /* 200ms */
439 while ((f
= read_status(kbdc
) & KBDS_BUFFER_FULL
)
440 != KBDS_AUX_BUFFER_FULL
) {
441 if (f
== KBDS_KBD_BUFFER_FULL
) {
442 DELAY(KBDD_DELAYTIME
);
446 DELAY(KBDC_DELAYTIME
);
447 if (CHECKTIMEOUT(&retry
))
450 DELAY(KBDD_DELAYTIME
);
455 * wait for an ACK(FAh), RESEND(FEh), or RESET_FAIL(FCh) from the aux device.
456 * queue anything else.
459 wait_for_aux_ack(struct atkbdc_softc
*kbdc
)
461 /* CPU will stay inside the loop for 200msec at most */
462 TOTALDELAY retry
= { 200000, 0 }; /* 200ms */
466 while (CHECKTIMEOUT(&retry
) == 0) {
467 if ((f
= read_status(kbdc
)) & KBDS_ANY_BUFFER_FULL
) {
468 DELAY(KBDD_DELAYTIME
);
470 if ((f
& KBDS_BUFFER_FULL
) == KBDS_AUX_BUFFER_FULL
) {
471 if ((b
== PSM_ACK
) || (b
== PSM_RESEND
)
472 || (b
== PSM_RESET_FAIL
))
475 } else if ((f
& KBDS_BUFFER_FULL
) == KBDS_KBD_BUFFER_FULL
) {
479 DELAY(KBDC_DELAYTIME
);
485 * Returns read-back data or -1 on failure
488 write_controller_w1r1(KBDC p
, int c
, int d
)
490 if (!write_controller_command(p
, c
))
492 if (!write_controller_data(p
, d
))
494 return (read_controller_data(p
));
497 /* write a one byte command to the controller */
499 write_controller_command(KBDC p
, int c
)
501 if (!wait_while_controller_busy(kbdcp(p
)))
503 write_command(kbdcp(p
), c
);
507 /* write a one byte data to the controller */
509 write_controller_data(KBDC p
, int c
)
511 if (!wait_while_controller_busy(kbdcp(p
)))
513 write_data(kbdcp(p
), c
);
517 /* write a one byte keyboard command */
519 write_kbd_command(KBDC p
, int c
)
521 if (!wait_while_controller_busy(kbdcp(p
)))
523 write_data(kbdcp(p
), c
);
527 /* write a one byte auxiliary device command */
529 write_aux_command(KBDC p
, int c
)
531 if (!write_controller_command(p
, KBDC_WRITE_TO_AUX
))
533 return write_controller_data(p
, c
);
536 /* send a command to the keyboard and wait for ACK */
538 send_kbd_command(KBDC p
, int c
)
540 int retry
= KBD_MAXRETRY
;
543 while (retry
-- > 0) {
544 if (!write_kbd_command(p
, c
))
546 res
= wait_for_kbd_ack(kbdcp(p
));
553 /* send a command to the auxiliary device and wait for ACK */
555 send_aux_command(KBDC p
, int c
)
557 int retry
= KBD_MAXRETRY
;
560 while (retry
-- > 0) {
561 if (!write_aux_command(p
, c
))
565 * The aux device may have already sent one or two bytes of
566 * status data, when a command is received. It will immediately
567 * stop data transmission, thus, leaving an incomplete data
568 * packet in our buffer. We have to discard any unprocessed
569 * data in order to remove such packets. Well, we may remove
570 * unprocessed, but necessary data byte as well...
572 emptyq(&kbdcp(p
)->aux
);
573 res
= wait_for_aux_ack(kbdcp(p
));
580 /* send a command and a data to the keyboard, wait for ACKs */
582 send_kbd_command_and_data(KBDC p
, int c
, int d
)
587 for (retry
= KBD_MAXRETRY
; retry
> 0; --retry
) {
588 if (!write_kbd_command(p
, c
))
590 res
= wait_for_kbd_ack(kbdcp(p
));
593 else if (res
!= KBD_RESEND
)
599 for (retry
= KBD_MAXRETRY
, res
= -1; retry
> 0; --retry
) {
600 if (!write_kbd_command(p
, d
))
602 res
= wait_for_kbd_ack(kbdcp(p
));
603 if (res
!= KBD_RESEND
)
609 /* send a command and a data to the auxiliary device, wait for ACKs */
611 send_aux_command_and_data(KBDC p
, int c
, int d
)
616 for (retry
= KBD_MAXRETRY
; retry
> 0; --retry
) {
617 if (!write_aux_command(p
, c
))
619 emptyq(&kbdcp(p
)->aux
);
620 res
= wait_for_aux_ack(kbdcp(p
));
623 else if (res
!= PSM_RESEND
)
629 for (retry
= KBD_MAXRETRY
, res
= -1; retry
> 0; --retry
) {
630 if (!write_aux_command(p
, d
))
632 res
= wait_for_aux_ack(kbdcp(p
));
633 if (res
!= PSM_RESEND
)
640 * read one byte from any source; whether from the controller,
641 * the keyboard, or the aux device
644 read_controller_data(KBDC p
)
646 if (availq(&kbdcp(p
)->kbd
))
647 return removeq(&kbdcp(p
)->kbd
);
648 if (availq(&kbdcp(p
)->aux
))
649 return removeq(&kbdcp(p
)->aux
);
650 if (!wait_for_data(kbdcp(p
)))
651 return -1; /* timeout */
652 return read_data(kbdcp(p
));
659 /* read one byte from the keyboard */
661 read_kbd_data(KBDC p
)
668 log(LOG_DEBUG
, "kbdc: kbd q: %d calls, max %d chars, "
669 "aux q: %d calls, max %d chars\n",
670 kbdcp(p
)->kbd
.call_count
, kbdcp(p
)->kbd
.max_qcount
,
671 kbdcp(p
)->aux
.call_count
, kbdcp(p
)->aux
.max_qcount
);
675 if (availq(&kbdcp(p
)->kbd
))
676 return removeq(&kbdcp(p
)->kbd
);
677 if (!wait_for_kbd_data(kbdcp(p
)))
678 return -1; /* timeout */
679 b
= read_data(kbdcp(p
));
683 /* read one byte from the keyboard, but return immediately if
687 read_kbd_data_no_wait(KBDC p
)
695 log(LOG_DEBUG
, "kbdc: kbd q: %d calls, max %d chars, "
696 "aux q: %d calls, max %d chars\n",
697 kbdcp(p
)->kbd
.call_count
, kbdcp(p
)->kbd
.max_qcount
,
698 kbdcp(p
)->aux
.call_count
, kbdcp(p
)->aux
.max_qcount
);
702 if (availq(&kbdcp(p
)->kbd
))
703 return removeq(&kbdcp(p
)->kbd
);
704 f
= read_status(kbdcp(p
)) & KBDS_BUFFER_FULL
;
705 while (f
== KBDS_AUX_BUFFER_FULL
) {
706 DELAY(KBDD_DELAYTIME
);
707 b
= read_data(kbdcp(p
));
708 addq(&kbdcp(p
)->aux
, b
);
709 f
= read_status(kbdcp(p
)) & KBDS_BUFFER_FULL
;
711 if (f
== KBDS_KBD_BUFFER_FULL
) {
712 DELAY(KBDD_DELAYTIME
);
713 b
= read_data(kbdcp(p
));
716 return -1; /* no data */
719 /* read one byte from the aux device */
721 read_aux_data(KBDC p
)
724 if (availq(&kbdcp(p
)->aux
))
725 return removeq(&kbdcp(p
)->aux
);
726 if (!wait_for_aux_data(kbdcp(p
)))
727 return -1; /* timeout */
728 b
= read_data(kbdcp(p
));
732 /* read one byte from the aux device, but return immediately if
736 read_aux_data_no_wait(KBDC p
)
741 if (availq(&kbdcp(p
)->aux
))
742 return removeq(&kbdcp(p
)->aux
);
743 f
= read_status(kbdcp(p
)) & KBDS_BUFFER_FULL
;
744 while (f
== KBDS_KBD_BUFFER_FULL
) {
745 DELAY(KBDD_DELAYTIME
);
746 b
= read_data(kbdcp(p
));
747 addq(&kbdcp(p
)->kbd
, b
);
748 f
= read_status(kbdcp(p
)) & KBDS_BUFFER_FULL
;
750 if (f
== KBDS_AUX_BUFFER_FULL
) {
751 DELAY(KBDD_DELAYTIME
);
752 b
= read_data(kbdcp(p
));
755 return -1; /* no data */
758 /* discard data from the keyboard */
760 empty_kbd_buffer(KBDC p
, int wait
)
771 for (t
= wait
; t
> 0; ) {
772 if ((f
= read_status(kbdcp(p
))) & KBDS_ANY_BUFFER_FULL
) {
773 DELAY(KBDD_DELAYTIME
);
774 b
= read_data(kbdcp(p
));
775 if ((f
& KBDS_BUFFER_FULL
) == KBDS_AUX_BUFFER_FULL
) {
776 addq(&kbdcp(p
)->aux
, b
);
790 if ((c1
> 0) || (c2
> 0))
791 log(LOG_DEBUG
, "kbdc: %d:%d char read (empty_kbd_buffer)\n", c1
, c2
);
794 emptyq(&kbdcp(p
)->kbd
);
797 /* discard data from the aux device */
799 empty_aux_buffer(KBDC p
, int wait
)
810 for (t
= wait
; t
> 0; ) {
811 if ((f
= read_status(kbdcp(p
))) & KBDS_ANY_BUFFER_FULL
) {
812 DELAY(KBDD_DELAYTIME
);
813 b
= read_data(kbdcp(p
));
814 if ((f
& KBDS_BUFFER_FULL
) == KBDS_KBD_BUFFER_FULL
) {
815 addq(&kbdcp(p
)->kbd
, b
);
829 if ((c1
> 0) || (c2
> 0))
830 log(LOG_DEBUG
, "kbdc: %d:%d char read (empty_aux_buffer)\n", c1
, c2
);
833 emptyq(&kbdcp(p
)->aux
);
836 /* discard any data from the keyboard or the aux device */
838 empty_both_buffers(KBDC p
, int wait
)
848 for (t
= wait
; t
> 0; ) {
849 if ((f
= read_status(kbdcp(p
))) & KBDS_ANY_BUFFER_FULL
) {
850 DELAY(KBDD_DELAYTIME
);
851 (void)read_data(kbdcp(p
));
853 if ((f
& KBDS_BUFFER_FULL
) == KBDS_KBD_BUFFER_FULL
)
865 if ((c1
> 0) || (c2
> 0))
866 log(LOG_DEBUG
, "kbdc: %d:%d char read (empty_both_buffers)\n", c1
, c2
);
869 emptyq(&kbdcp(p
)->kbd
);
870 emptyq(&kbdcp(p
)->aux
);
873 /* keyboard and mouse device control */
875 /* NOTE: enable the keyboard port but disable the keyboard
876 * interrupt before calling "reset_kbd()".
881 int retry
= KBD_MAXRETRY
;
882 int again
= KBD_MAXWAIT
;
883 int c
= KBD_RESEND
; /* keep the compiler happy */
885 while (retry
-- > 0) {
886 empty_both_buffers(p
, 10);
887 if (!write_kbd_command(p
, KBDC_RESET_KBD
))
889 emptyq(&kbdcp(p
)->kbd
);
890 c
= read_controller_data(p
);
891 if (verbose
|| bootverbose
)
892 log(LOG_DEBUG
, "kbdc: RESET_KBD return code:%04x\n", c
);
893 if (c
== KBD_ACK
) /* keyboard has agreed to reset itself... */
899 while (again
-- > 0) {
900 /* wait awhile, well, in fact we must wait quite loooooooooooong */
901 DELAY(KBD_RESETDELAY
*1000);
902 c
= read_controller_data(p
); /* RESET_DONE/RESET_FAIL */
903 if (c
!= -1) /* wait again if the controller is not ready */
906 if (verbose
|| bootverbose
)
907 log(LOG_DEBUG
, "kbdc: RESET_KBD status:%04x\n", c
);
908 if (c
!= KBD_RESET_DONE
)
913 /* NOTE: enable the aux port but disable the aux interrupt
914 * before calling `reset_aux_dev()'.
917 reset_aux_dev(KBDC p
)
919 int retry
= KBD_MAXRETRY
;
920 int again
= KBD_MAXWAIT
;
921 int c
= PSM_RESEND
; /* keep the compiler happy */
923 while (retry
-- > 0) {
924 empty_both_buffers(p
, 10);
925 if (!write_aux_command(p
, PSMC_RESET_DEV
))
927 emptyq(&kbdcp(p
)->aux
);
928 /* NOTE: Compaq Armada laptops require extra delay here. XXX */
929 for (again
= KBD_MAXWAIT
; again
> 0; --again
) {
930 DELAY(KBD_RESETDELAY
*1000);
931 c
= read_aux_data_no_wait(p
);
935 if (verbose
|| bootverbose
)
936 log(LOG_DEBUG
, "kbdc: RESET_AUX return code:%04x\n", c
);
937 if (c
== PSM_ACK
) /* aux dev is about to reset... */
943 for (again
= KBD_MAXWAIT
; again
> 0; --again
) {
944 /* wait awhile, well, quite looooooooooooong */
945 DELAY(KBD_RESETDELAY
*1000);
946 c
= read_aux_data_no_wait(p
); /* RESET_DONE/RESET_FAIL */
947 if (c
!= -1) /* wait again if the controller is not ready */
950 if (verbose
|| bootverbose
)
951 log(LOG_DEBUG
, "kbdc: RESET_AUX status:%04x\n", c
);
952 if (c
!= PSM_RESET_DONE
) /* reset status */
955 c
= read_aux_data(p
); /* device ID */
956 if (verbose
|| bootverbose
)
957 log(LOG_DEBUG
, "kbdc: RESET_AUX ID:%04x\n", c
);
958 /* NOTE: we could check the device ID now, but leave it later... */
962 /* controller diagnostics and setup */
965 test_controller(KBDC p
)
967 int retry
= KBD_MAXRETRY
;
968 int again
= KBD_MAXWAIT
;
969 int c
= KBD_DIAG_FAIL
;
971 while (retry
-- > 0) {
972 empty_both_buffers(p
, 10);
973 if (write_controller_command(p
, KBDC_DIAGNOSE
))
979 emptyq(&kbdcp(p
)->kbd
);
980 while (again
-- > 0) {
982 DELAY(KBD_RESETDELAY
*1000);
983 c
= read_controller_data(p
); /* DIAG_DONE/DIAG_FAIL */
984 if (c
!= -1) /* wait again if the controller is not ready */
987 if (verbose
|| bootverbose
)
988 log(LOG_DEBUG
, "kbdc: DIAGNOSE status:%04x\n", c
);
989 return (c
== KBD_DIAG_DONE
);
993 test_kbd_port(KBDC p
)
995 int retry
= KBD_MAXRETRY
;
996 int again
= KBD_MAXWAIT
;
999 while (retry
-- > 0) {
1000 empty_both_buffers(p
, 10);
1001 if (write_controller_command(p
, KBDC_TEST_KBD_PORT
))
1007 emptyq(&kbdcp(p
)->kbd
);
1008 while (again
-- > 0) {
1009 c
= read_controller_data(p
);
1010 if (c
!= -1) /* try again if the controller is not ready */
1013 if (verbose
|| bootverbose
)
1014 log(LOG_DEBUG
, "kbdc: TEST_KBD_PORT status:%04x\n", c
);
1019 test_aux_port(KBDC p
)
1021 int retry
= KBD_MAXRETRY
;
1022 int again
= KBD_MAXWAIT
;
1025 while (retry
-- > 0) {
1026 empty_both_buffers(p
, 10);
1027 if (write_controller_command(p
, KBDC_TEST_AUX_PORT
))
1033 emptyq(&kbdcp(p
)->kbd
);
1034 while (again
-- > 0) {
1035 c
= read_controller_data(p
);
1036 if (c
!= -1) /* try again if the controller is not ready */
1039 if (verbose
|| bootverbose
)
1040 log(LOG_DEBUG
, "kbdc: TEST_AUX_PORT status:%04x\n", c
);
1045 get_controller_command_byte(KBDC p
)
1047 if (kbdcp(p
)->command_byte
!= -1)
1048 return kbdcp(p
)->command_byte
;
1049 if (!write_controller_command(p
, KBDC_GET_COMMAND_BYTE
))
1051 emptyq(&kbdcp(p
)->kbd
);
1052 kbdcp(p
)->command_byte
= read_controller_data(p
);
1053 return kbdcp(p
)->command_byte
;
1057 set_controller_command_byte(KBDC p
, int mask
, int command
)
1059 if (get_controller_command_byte(p
) == -1)
1062 command
= (kbdcp(p
)->command_byte
& ~mask
) | (command
& mask
);
1064 if (mask
& KBD_DISABLE_KBD_PORT
) {
1065 if (command
& KBD_DISABLE_KBD_PORT
) {
1066 if (!write_controller_command(p
, KBDC_DISABLE_KBD_PORT
))
1071 if (!write_controller_command(p
, KBDC_SET_COMMAND_BYTE
))
1073 if (!write_controller_data(p
, command
))
1076 if (mask
& KBD_DISABLE_KBD_PORT
) {
1077 if ((command
& KBD_DISABLE_KBD_PORT
) == 0) {
1078 if (!write_controller_command(p
, KBDC_ENABLE_KBD_PORT
))
1083 kbdcp(p
)->command_byte
= command
;
1086 log(LOG_DEBUG
, "kbdc: new command byte:%04x (set_controller...)\n",