1 /*-
2 * Copyright (c) 1996-1999
3 * Kazutaka YOKOTA (yokota@zodiac.mech.utsunomiya-u.ac.jp)
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote
15 * products derived from this software without specific prior written
16 * permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * from kbdio.c,v 1.13 1998/09/25 11:55:46 yokota Exp
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/6.0/sys/dev/atkbdc/atkbdc.c 147271 2005-06-10 20:56:38Z marius $");
35
36 #include "opt_kbd.h"
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/bus.h>
41 #include <sys/malloc.h>
42 #include <sys/syslog.h>
43 #include <machine/bus.h>
44 #include <machine/resource.h>
45 #include <sys/rman.h>
46
47 #include <dev/atkbdc/atkbdcreg.h>
48
49 #ifdef __sparc64__
50 #include <dev/ofw/openfirm.h>
51 #include <machine/bus_private.h>
52 #include <machine/ofw_machdep.h>
53 #else
54 #include <isa/isareg.h>
55 #endif
56
57 /* constants */
58
59 #define MAXKBDC 1 /* XXX */
60
61 /* macros */
62
63 #ifndef MAX
64 #define MAX(x, y) ((x) > (y) ? (x) : (y))
65 #endif
66
67 #define kbdcp(p) ((atkbdc_softc_t *)(p))
68 #define nextq(i) (((i) + 1) % KBDQ_BUFSIZE)
69 #define availq(q) ((q)->head != (q)->tail)
70 #if KBDIO_DEBUG >= 2
71 #define emptyq(q) ((q)->tail = (q)->head = (q)->qcount = 0)
72 #else
73 #define emptyq(q) ((q)->tail = (q)->head = 0)
74 #endif
75
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)))
82
83 /* local variables */
84
85 /*
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
90 */
91 static atkbdc_softc_t default_kbdc;
92 static atkbdc_softc_t *atkbdc_softc[MAXKBDC] = { &default_kbdc };
93
94 static int verbose = KBDIO_DEBUG;
95
96 #ifdef __sparc64__
97 static struct bus_space_tag atkbdc_bst_store[MAXKBDC];
98 #endif
99
100 /* function prototypes */
101
102 static int atkbdc_setup(atkbdc_softc_t *sc, bus_space_tag_t tag,
103 bus_space_handle_t h0, bus_space_handle_t h1);
104 static int addq(kqueue *q, int c);
105 static int removeq(kqueue *q);
106 static int wait_while_controller_busy(atkbdc_softc_t *kbdc);
107 static int wait_for_data(atkbdc_softc_t *kbdc);
108 static int wait_for_kbd_data(atkbdc_softc_t *kbdc);
109 static int wait_for_kbd_ack(atkbdc_softc_t *kbdc);
110 static int wait_for_aux_data(atkbdc_softc_t *kbdc);
111 static int wait_for_aux_ack(atkbdc_softc_t *kbdc);
112
113 atkbdc_softc_t
114 *atkbdc_get_softc(int unit)
115 {
116 atkbdc_softc_t *sc;
117
118 if (unit >= sizeof(atkbdc_softc)/sizeof(atkbdc_softc[0]))
119 return NULL;
120 sc = atkbdc_softc[unit];
121 if (sc == NULL) {
122 sc = atkbdc_softc[unit]
123 = malloc(sizeof(*sc), M_DEVBUF, M_NOWAIT | M_ZERO);
124 if (sc == NULL)
125 return NULL;
126 }
127 return sc;
128 }
129
130 int
131 atkbdc_probe_unit(int unit, struct resource *port0, struct resource *port1)
132 {
133 if (rman_get_start(port0) <= 0)
134 return ENXIO;
135 if (rman_get_start(port1) <= 0)
136 return ENXIO;
137 return 0;
138 }
139
140 int
141 atkbdc_attach_unit(int unit, atkbdc_softc_t *sc, struct resource *port0,
142 struct resource *port1)
143 {
144 return atkbdc_setup(sc, rman_get_bustag(port0),
145 rman_get_bushandle(port0),
146 rman_get_bushandle(port1));
147 }
148
149 /* the backdoor to the keyboard controller! XXX */
150 int
151 atkbdc_configure(void)
152 {
153 bus_space_tag_t tag;
154 bus_space_handle_t h0;
155 bus_space_handle_t h1;
156 #ifdef __sparc64__
157 char name[32];
158 phandle_t chosen, node;
159 ihandle_t stdin;
160 bus_addr_t port0;
161 bus_addr_t port1;
162 int space;
163 #else
164 int port0;
165 int port1;
166 #endif
167
168 /* XXX: tag should be passed from the caller */
169 #if defined(__i386__)
170 tag = I386_BUS_SPACE_IO;
171 #elif defined(__amd64__)
172 tag = AMD64_BUS_SPACE_IO;
173 #elif defined(__alpha__)
174 tag = busspace_isa_io;
175 #elif defined(__ia64__)
176 tag = IA64_BUS_SPACE_IO;
177 #elif defined(__sparc64__)
178 tag = &atkbdc_bst_store[0];
179 #else
180 #error "define tag!"
181 #endif
182
183 #ifdef __sparc64__
184 if ((chosen = OF_finddevice("/chosen")) == -1)
185 return 0;
186 if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1)
187 return 0;
188 if ((node = OF_instance_to_package(stdin)) == -1)
189 return 0;
190 if (OF_getprop(node, "name", name, sizeof(name)) == -1)
191 return 0;
192 name[sizeof(name) - 1] = '\0';
193 if (strcmp(name, "kb_ps2") != 0)
194 return 0;
195 /*
196 * The stdin handle points to an instance of a PS/2 keyboard
197 * package but we want the 8042 controller, which is the parent
198 * of that keyboard node.
199 */
200 if ((node = OF_parent(node)) == 0)
201 return 0;
202 if (OF_decode_addr(node, 0, &space, &port0) != 0)
203 return 0;
204 h0 = sparc64_fake_bustag(space, port0, tag);
205 bus_space_subregion(tag, h0, KBD_DATA_PORT, 1, &h0);
206 if (OF_decode_addr(node, 1, &space, &port1) != 0)
207 return 0;
208 h1 = sparc64_fake_bustag(space, port1, tag);
209 bus_space_subregion(tag, h1, KBD_STATUS_PORT, 1, &h1);
210 #else
211 port0 = IO_KBD;
212 resource_int_value("atkbdc", 0, "port", &port0);
213 port1 = IO_KBD + KBD_STATUS_PORT;
214 #if notyet
215 bus_space_map(tag, port0, IO_KBDSIZE, 0, &h0);
216 bus_space_map(tag, port1, IO_KBDSIZE, 0, &h1);
217 #else
218 h0 = (bus_space_handle_t)port0;
219 h1 = (bus_space_handle_t)port1;
220 #endif
221 #endif
222 return atkbdc_setup(atkbdc_softc[0], tag, h0, h1);
223 }
224
225 static int
226 atkbdc_setup(atkbdc_softc_t *sc, bus_space_tag_t tag, bus_space_handle_t h0,
227 bus_space_handle_t h1)
228 {
229 if (sc->ioh0 == 0) { /* XXX */
230 sc->command_byte = -1;
231 sc->command_mask = 0;
232 sc->lock = FALSE;
233 sc->kbd.head = sc->kbd.tail = 0;
234 sc->aux.head = sc->aux.tail = 0;
235 #if KBDIO_DEBUG >= 2
236 sc->kbd.call_count = 0;
237 sc->kbd.qcount = sc->kbd.max_qcount = 0;
238 sc->aux.call_count = 0;
239 sc->aux.qcount = sc->aux.max_qcount = 0;
240 #endif
241 }
242 sc->iot = tag;
243 sc->ioh0 = h0;
244 sc->ioh1 = h1;
245 return 0;
246 }
247
248 /* open a keyboard controller */
249 KBDC
250 atkbdc_open(int unit)
251 {
252 if (unit <= 0)
253 unit = 0;
254 if (unit >= MAXKBDC)
255 return NULL;
256 if ((atkbdc_softc[unit]->port0 != NULL)
257 || (atkbdc_softc[unit]->ioh0 != 0)) /* XXX */
258 return (KBDC)atkbdc_softc[unit];
259 return NULL;
260 }
261
262 /*
263 * I/O access arbitration in `kbdio'
264 *
265 * The `kbdio' module uses a simplistic convention to arbitrate
266 * I/O access to the controller/keyboard/mouse. The convention requires
267 * close cooperation of the calling device driver.
268 *
269 * The device drivers which utilize the `kbdio' module are assumed to
270 * have the following set of routines.
271 * a. An interrupt handler (the bottom half of the driver).
272 * b. Timeout routines which may briefly poll the keyboard controller.
273 * c. Routines outside interrupt context (the top half of the driver).
274 * They should follow the rules below:
275 * 1. The interrupt handler may assume that it always has full access
276 * to the controller/keyboard/mouse.
277 * 2. The other routines must issue `spltty()' if they wish to
278 * prevent the interrupt handler from accessing
279 * the controller/keyboard/mouse.
280 * 3. The timeout routines and the top half routines of the device driver
281 * arbitrate I/O access by observing the lock flag in `kbdio'.
282 * The flag is manipulated via `kbdc_lock()'; when one wants to
283 * perform I/O, call `kbdc_lock(kbdc, TRUE)' and proceed only if
284 * the call returns with TRUE. Otherwise the caller must back off.
285 * Call `kbdc_lock(kbdc, FALSE)' when necessary I/O operaion
286 * is finished. This mechanism does not prevent the interrupt
287 * handler from being invoked at any time and carrying out I/O.
288 * Therefore, `spltty()' must be strategically placed in the device
289 * driver code. Also note that the timeout routine may interrupt
290 * `kbdc_lock()' called by the top half of the driver, but this
291 * interruption is OK so long as the timeout routine observes
292 * rule 4 below.
293 * 4. The interrupt and timeout routines should not extend I/O operation
294 * across more than one interrupt or timeout; they must complete any
295 * necessary I/O operation within one invocation of the routine.
296 * This means that if the timeout routine acquires the lock flag,
297 * it must reset the flag to FALSE before it returns.
298 */
299
300 /* set/reset polling lock */
301 int
302 kbdc_lock(KBDC p, int lock)
303 {
304 int prevlock;
305
306 prevlock = kbdcp(p)->lock;
307 kbdcp(p)->lock = lock;
308
309 return (prevlock != lock);
310 }
311
312 /* check if any data is waiting to be processed */
313 int
314 kbdc_data_ready(KBDC p)
315 {
316 return (availq(&kbdcp(p)->kbd) || availq(&kbdcp(p)->aux)
317 || (read_status(kbdcp(p)) & KBDS_ANY_BUFFER_FULL));
318 }
319
320 /* queuing functions */
321
322 static int
323 addq(kqueue *q, int c)
324 {
325 if (nextq(q->tail) != q->head) {
326 q->q[q->tail] = c;
327 q->tail = nextq(q->tail);
328 #if KBDIO_DEBUG >= 2
329 ++q->call_count;
330 ++q->qcount;
331 if (q->qcount > q->max_qcount)
332 q->max_qcount = q->qcount;
333 #endif
334 return TRUE;
335 }
336 return FALSE;
337 }
338
339 static int
340 removeq(kqueue *q)
341 {
342 int c;
343
344 if (q->tail != q->head) {
345 c = q->q[q->head];
346 q->head = nextq(q->head);
347 #if KBDIO_DEBUG >= 2
348 --q->qcount;
349 #endif
350 return c;
351 }
352 return -1;
353 }
354
355 /*
356 * device I/O routines
357 */
358 static int
359 wait_while_controller_busy(struct atkbdc_softc *kbdc)
360 {
361 /* CPU will stay inside the loop for 100msec at most */
362 int retry = 5000;
363 int f;
364
365 while ((f = read_status(kbdc)) & KBDS_INPUT_BUFFER_FULL) {
366 if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
367 DELAY(KBDD_DELAYTIME);
368 addq(&kbdc->kbd, read_data(kbdc));
369 } else if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) {
370 DELAY(KBDD_DELAYTIME);
371 addq(&kbdc->aux, read_data(kbdc));
372 }
373 DELAY(KBDC_DELAYTIME);
374 if (--retry < 0)
375 return FALSE;
376 }
377 return TRUE;
378 }
379
380 /*
381 * wait for any data; whether it's from the controller,
382 * the keyboard, or the aux device.
383 */
384 static int
385 wait_for_data(struct atkbdc_softc *kbdc)
386 {
387 /* CPU will stay inside the loop for 200msec at most */
388 int retry = 10000;
389 int f;
390
391 while ((f = read_status(kbdc) & KBDS_ANY_BUFFER_FULL) == 0) {
392 DELAY(KBDC_DELAYTIME);
393 if (--retry < 0)
394 return 0;
395 }
396 DELAY(KBDD_DELAYTIME);
397 return f;
398 }
399
400 /* wait for data from the keyboard */
401 static int
402 wait_for_kbd_data(struct atkbdc_softc *kbdc)
403 {
404 /* CPU will stay inside the loop for 200msec at most */
405 int retry = 10000;
406 int f;
407
408 while ((f = read_status(kbdc) & KBDS_BUFFER_FULL)
409 != KBDS_KBD_BUFFER_FULL) {
410 if (f == KBDS_AUX_BUFFER_FULL) {
411 DELAY(KBDD_DELAYTIME);
412 addq(&kbdc->aux, read_data(kbdc));
413 }
414 DELAY(KBDC_DELAYTIME);
415 if (--retry < 0)
416 return 0;
417 }
418 DELAY(KBDD_DELAYTIME);
419 return f;
420 }
421
422 /*
423 * wait for an ACK(FAh), RESEND(FEh), or RESET_FAIL(FCh) from the keyboard.
424 * queue anything else.
425 */
426 static int
427 wait_for_kbd_ack(struct atkbdc_softc *kbdc)
428 {
429 /* CPU will stay inside the loop for 200msec at most */
430 int retry = 10000;
431 int f;
432 int b;
433
434 while (retry-- > 0) {
435 if ((f = read_status(kbdc)) & KBDS_ANY_BUFFER_FULL) {
436 DELAY(KBDD_DELAYTIME);
437 b = read_data(kbdc);
438 if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
439 if ((b == KBD_ACK) || (b == KBD_RESEND)
440 || (b == KBD_RESET_FAIL))
441 return b;
442 addq(&kbdc->kbd, b);
443 } else if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) {
444 addq(&kbdc->aux, b);
445 }
446 }
447 DELAY(KBDC_DELAYTIME);
448 }
449 return -1;
450 }
451
452 /* wait for data from the aux device */
453 static int
454 wait_for_aux_data(struct atkbdc_softc *kbdc)
455 {
456 /* CPU will stay inside the loop for 200msec at most */
457 int retry = 10000;
458 int f;
459
460 while ((f = read_status(kbdc) & KBDS_BUFFER_FULL)
461 != KBDS_AUX_BUFFER_FULL) {
462 if (f == KBDS_KBD_BUFFER_FULL) {
463 DELAY(KBDD_DELAYTIME);
464 addq(&kbdc->kbd, read_data(kbdc));
465 }
466 DELAY(KBDC_DELAYTIME);
467 if (--retry < 0)
468 return 0;
469 }
470 DELAY(KBDD_DELAYTIME);
471 return f;
472 }
473
474 /*
475 * wait for an ACK(FAh), RESEND(FEh), or RESET_FAIL(FCh) from the aux device.
476 * queue anything else.
477 */
478 static int
479 wait_for_aux_ack(struct atkbdc_softc *kbdc)
480 {
481 /* CPU will stay inside the loop for 200msec at most */
482 int retry = 10000;
483 int f;
484 int b;
485
486 while (retry-- > 0) {
487 if ((f = read_status(kbdc)) & KBDS_ANY_BUFFER_FULL) {
488 DELAY(KBDD_DELAYTIME);
489 b = read_data(kbdc);
490 if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) {
491 if ((b == PSM_ACK) || (b == PSM_RESEND)
492 || (b == PSM_RESET_FAIL))
493 return b;
494 addq(&kbdc->aux, b);
495 } else if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
496 addq(&kbdc->kbd, b);
497 }
498 }
499 DELAY(KBDC_DELAYTIME);
500 }
501 return -1;
502 }
503
504 /* write a one byte command to the controller */
505 int
506 write_controller_command(KBDC p, int c)
507 {
508 if (!wait_while_controller_busy(kbdcp(p)))
509 return FALSE;
510 write_command(kbdcp(p), c);
511 return TRUE;
512 }
513
514 /* write a one byte data to the controller */
515 int
516 write_controller_data(KBDC p, int c)
517 {
518 if (!wait_while_controller_busy(kbdcp(p)))
519 return FALSE;
520 write_data(kbdcp(p), c);
521 return TRUE;
522 }
523
524 /* write a one byte keyboard command */
525 int
526 write_kbd_command(KBDC p, int c)
527 {
528 if (!wait_while_controller_busy(kbdcp(p)))
529 return FALSE;
530 write_data(kbdcp(p), c);
531 return TRUE;
532 }
533
534 /* write a one byte auxiliary device command */
535 int
536 write_aux_command(KBDC p, int c)
537 {
538 if (!write_controller_command(p, KBDC_WRITE_TO_AUX))
539 return FALSE;
540 return write_controller_data(p, c);
541 }
542
543 /* send a command to the keyboard and wait for ACK */
544 int
545 send_kbd_command(KBDC p, int c)
546 {
547 int retry = KBD_MAXRETRY;
548 int res = -1;
549
550 while (retry-- > 0) {
551 if (!write_kbd_command(p, c))
552 continue;
553 res = wait_for_kbd_ack(kbdcp(p));
554 if (res == KBD_ACK)
555 break;
556 }
557 return res;
558 }
559
560 /* send a command to the auxiliary device and wait for ACK */
561 int
562 send_aux_command(KBDC p, int c)
563 {
564 int retry = KBD_MAXRETRY;
565 int res = -1;
566
567 while (retry-- > 0) {
568 if (!write_aux_command(p, c))
569 continue;
570 /*
571 * FIXME: XXX
572 * The aux device may have already sent one or two bytes of
573 * status data, when a command is received. It will immediately
574 * stop data transmission, thus, leaving an incomplete data
575 * packet in our buffer. We have to discard any unprocessed
576 * data in order to remove such packets. Well, we may remove
577 * unprocessed, but necessary data byte as well...
578 */
579 emptyq(&kbdcp(p)->aux);
580 res = wait_for_aux_ack(kbdcp(p));
581 if (res == PSM_ACK)
582 break;
583 }
584 return res;
585 }
586
587 /* send a command and a data to the keyboard, wait for ACKs */
588 int
589 send_kbd_command_and_data(KBDC p, int c, int d)
590 {
591 int retry;
592 int res = -1;
593
594 for (retry = KBD_MAXRETRY; retry > 0; --retry) {
595 if (!write_kbd_command(p, c))
596 continue;
597 res = wait_for_kbd_ack(kbdcp(p));
598 if (res == KBD_ACK)
599 break;
600 else if (res != KBD_RESEND)
601 return res;
602 }
603 if (retry <= 0)
604 return res;
605
606 for (retry = KBD_MAXRETRY, res = -1; retry > 0; --retry) {
607 if (!write_kbd_command(p, d))
608 continue;
609 res = wait_for_kbd_ack(kbdcp(p));
610 if (res != KBD_RESEND)
611 break;
612 }
613 return res;
614 }
615
616 /* send a command and a data to the auxiliary device, wait for ACKs */
617 int
618 send_aux_command_and_data(KBDC p, int c, int d)
619 {
620 int retry;
621 int res = -1;
622
623 for (retry = KBD_MAXRETRY; retry > 0; --retry) {
624 if (!write_aux_command(p, c))
625 continue;
626 emptyq(&kbdcp(p)->aux);
627 res = wait_for_aux_ack(kbdcp(p));
628 if (res == PSM_ACK)
629 break;
630 else if (res != PSM_RESEND)
631 return res;
632 }
633 if (retry <= 0)
634 return res;
635
636 for (retry = KBD_MAXRETRY, res = -1; retry > 0; --retry) {
637 if (!write_aux_command(p, d))
638 continue;
639 res = wait_for_aux_ack(kbdcp(p));
640 if (res != PSM_RESEND)
641 break;
642 }
643 return res;
644 }
645
646 /*
647 * read one byte from any source; whether from the controller,
648 * the keyboard, or the aux device
649 */
650 int
651 read_controller_data(KBDC p)
652 {
653 if (availq(&kbdcp(p)->kbd))
654 return removeq(&kbdcp(p)->kbd);
655 if (availq(&kbdcp(p)->aux))
656 return removeq(&kbdcp(p)->aux);
657 if (!wait_for_data(kbdcp(p)))
658 return -1; /* timeout */
659 return read_data(kbdcp(p));
660 }
661
662 #if KBDIO_DEBUG >= 2
663 static int call = 0;
664 #endif
665
666 /* read one byte from the keyboard */
667 int
668 read_kbd_data(KBDC p)
669 {
670 #if KBDIO_DEBUG >= 2
671 if (++call > 2000) {
672 call = 0;
673 log(LOG_DEBUG, "kbdc: kbd q: %d calls, max %d chars, "
674 "aux q: %d calls, max %d chars\n",
675 kbdcp(p)->kbd.call_count, kbdcp(p)->kbd.max_qcount,
676 kbdcp(p)->aux.call_count, kbdcp(p)->aux.max_qcount);
677 }
678 #endif
679
680 if (availq(&kbdcp(p)->kbd))
681 return removeq(&kbdcp(p)->kbd);
682 if (!wait_for_kbd_data(kbdcp(p)))
683 return -1; /* timeout */
684 return read_data(kbdcp(p));
685 }
686
687 /* read one byte from the keyboard, but return immediately if
688 * no data is waiting
689 */
690 int
691 read_kbd_data_no_wait(KBDC p)
692 {
693 int f;
694
695 #if KBDIO_DEBUG >= 2
696 if (++call > 2000) {
697 call = 0;
698 log(LOG_DEBUG, "kbdc: kbd q: %d calls, max %d chars, "
699 "aux q: %d calls, max %d chars\n",
700 kbdcp(p)->kbd.call_count, kbdcp(p)->kbd.max_qcount,
701 kbdcp(p)->aux.call_count, kbdcp(p)->aux.max_qcount);
702 }
703 #endif
704
705 if (availq(&kbdcp(p)->kbd))
706 return removeq(&kbdcp(p)->kbd);
707 f = read_status(kbdcp(p)) & KBDS_BUFFER_FULL;
708 if (f == KBDS_AUX_BUFFER_FULL) {
709 DELAY(KBDD_DELAYTIME);
710 addq(&kbdcp(p)->aux, read_data(kbdcp(p)));
711 f = read_status(kbdcp(p)) & KBDS_BUFFER_FULL;
712 }
713 if (f == KBDS_KBD_BUFFER_FULL) {
714 DELAY(KBDD_DELAYTIME);
715 return read_data(kbdcp(p));
716 }
717 return -1; /* no data */
718 }
719
720 /* read one byte from the aux device */
721 int
722 read_aux_data(KBDC p)
723 {
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 return read_data(kbdcp(p));
729 }
730
731 /* read one byte from the aux device, but return immediately if
732 * no data is waiting
733 */
734 int
735 read_aux_data_no_wait(KBDC p)
736 {
737 int f;
738
739 if (availq(&kbdcp(p)->aux))
740 return removeq(&kbdcp(p)->aux);
741 f = read_status(kbdcp(p)) & KBDS_BUFFER_FULL;
742 if (f == KBDS_KBD_BUFFER_FULL) {
743 DELAY(KBDD_DELAYTIME);
744 addq(&kbdcp(p)->kbd, read_data(kbdcp(p)));
745 f = read_status(kbdcp(p)) & KBDS_BUFFER_FULL;
746 }
747 if (f == KBDS_AUX_BUFFER_FULL) {
748 DELAY(KBDD_DELAYTIME);
749 return read_data(kbdcp(p));
750 }
751 return -1; /* no data */
752 }
753
754 /* discard data from the keyboard */
755 void
756 empty_kbd_buffer(KBDC p, int wait)
757 {
758 int t;
759 int b;
760 int f;
761 #if KBDIO_DEBUG >= 2
762 int c1 = 0;
763 int c2 = 0;
764 #endif
765 int delta = 2;
766
767 for (t = wait; t > 0; ) {
768 if ((f = read_status(kbdcp(p))) & KBDS_ANY_BUFFER_FULL) {
769 DELAY(KBDD_DELAYTIME);
770 b = read_data(kbdcp(p));
771 if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) {
772 addq(&kbdcp(p)->aux, b);
773 #if KBDIO_DEBUG >= 2
774 ++c2;
775 } else {
776 ++c1;
777 #endif
778 }
779 t = wait;
780 } else {
781 t -= delta;
782 }
783 DELAY(delta*1000);
784 }
785 #if KBDIO_DEBUG >= 2
786 if ((c1 > 0) || (c2 > 0))
787 log(LOG_DEBUG, "kbdc: %d:%d char read (empty_kbd_buffer)\n", c1, c2);
788 #endif
789
790 emptyq(&kbdcp(p)->kbd);
791 }
792
793 /* discard data from the aux device */
794 void
795 empty_aux_buffer(KBDC p, int wait)
796 {
797 int t;
798 int b;
799 int f;
800 #if KBDIO_DEBUG >= 2
801 int c1 = 0;
802 int c2 = 0;
803 #endif
804 int delta = 2;
805
806 for (t = wait; t > 0; ) {
807 if ((f = read_status(kbdcp(p))) & KBDS_ANY_BUFFER_FULL) {
808 DELAY(KBDD_DELAYTIME);
809 b = read_data(kbdcp(p));
810 if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
811 addq(&kbdcp(p)->kbd, b);
812 #if KBDIO_DEBUG >= 2
813 ++c1;
814 } else {
815 ++c2;
816 #endif
817 }
818 t = wait;
819 } else {
820 t -= delta;
821 }
822 DELAY(delta*1000);
823 }
824 #if KBDIO_DEBUG >= 2
825 if ((c1 > 0) || (c2 > 0))
826 log(LOG_DEBUG, "kbdc: %d:%d char read (empty_aux_buffer)\n", c1, c2);
827 #endif
828
829 emptyq(&kbdcp(p)->aux);
830 }
831
832 /* discard any data from the keyboard or the aux device */
833 void
834 empty_both_buffers(KBDC p, int wait)
835 {
836 int t;
837 int f;
838 #if KBDIO_DEBUG >= 2
839 int c1 = 0;
840 int c2 = 0;
841 #endif
842 int delta = 2;
843
844 for (t = wait; t > 0; ) {
845 if ((f = read_status(kbdcp(p))) & KBDS_ANY_BUFFER_FULL) {
846 DELAY(KBDD_DELAYTIME);
847 (void)read_data(kbdcp(p));
848 #if KBDIO_DEBUG >= 2
849 if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL)
850 ++c1;
851 else
852 ++c2;
853 #endif
854 t = wait;
855 } else {
856 t -= delta;
857 }
858 DELAY(delta*1000);
859 }
860 #if KBDIO_DEBUG >= 2
861 if ((c1 > 0) || (c2 > 0))
862 log(LOG_DEBUG, "kbdc: %d:%d char read (empty_both_buffers)\n", c1, c2);
863 #endif
864
865 emptyq(&kbdcp(p)->kbd);
866 emptyq(&kbdcp(p)->aux);
867 }
868
869 /* keyboard and mouse device control */
870
871 /* NOTE: enable the keyboard port but disable the keyboard
872 * interrupt before calling "reset_kbd()".
873 */
874 int
875 reset_kbd(KBDC p)
876 {
877 int retry = KBD_MAXRETRY;
878 int again = KBD_MAXWAIT;
879 int c = KBD_RESEND; /* keep the compiler happy */
880
881 while (retry-- > 0) {
882 empty_both_buffers(p, 10);
883 if (!write_kbd_command(p, KBDC_RESET_KBD))
884 continue;
885 emptyq(&kbdcp(p)->kbd);
886 c = read_controller_data(p);
887 if (verbose || bootverbose)
888 log(LOG_DEBUG, "kbdc: RESET_KBD return code:%04x\n", c);
889 if (c == KBD_ACK) /* keyboard has agreed to reset itself... */
890 break;
891 }
892 if (retry < 0)
893 return FALSE;
894
895 while (again-- > 0) {
896 /* wait awhile, well, in fact we must wait quite loooooooooooong */
897 DELAY(KBD_RESETDELAY*1000);
898 c = read_controller_data(p); /* RESET_DONE/RESET_FAIL */
899 if (c != -1) /* wait again if the controller is not ready */
900 break;
901 }
902 if (verbose || bootverbose)
903 log(LOG_DEBUG, "kbdc: RESET_KBD status:%04x\n", c);
904 if (c != KBD_RESET_DONE)
905 return FALSE;
906 return TRUE;
907 }
908
909 /* NOTE: enable the aux port but disable the aux interrupt
910 * before calling `reset_aux_dev()'.
911 */
912 int
913 reset_aux_dev(KBDC p)
914 {
915 int retry = KBD_MAXRETRY;
916 int again = KBD_MAXWAIT;
917 int c = PSM_RESEND; /* keep the compiler happy */
918
919 while (retry-- > 0) {
920 empty_both_buffers(p, 10);
921 if (!write_aux_command(p, PSMC_RESET_DEV))
922 continue;
923 emptyq(&kbdcp(p)->aux);
924 /* NOTE: Compaq Armada laptops require extra delay here. XXX */
925 for (again = KBD_MAXWAIT; again > 0; --again) {
926 DELAY(KBD_RESETDELAY*1000);
927 c = read_aux_data_no_wait(p);
928 if (c != -1)
929 break;
930 }
931 if (verbose || bootverbose)
932 log(LOG_DEBUG, "kbdc: RESET_AUX return code:%04x\n", c);
933 if (c == PSM_ACK) /* aux dev is about to reset... */
934 break;
935 }
936 if (retry < 0)
937 return FALSE;
938
939 for (again = KBD_MAXWAIT; again > 0; --again) {
940 /* wait awhile, well, quite looooooooooooong */
941 DELAY(KBD_RESETDELAY*1000);
942 c = read_aux_data_no_wait(p); /* RESET_DONE/RESET_FAIL */
943 if (c != -1) /* wait again if the controller is not ready */
944 break;
945 }
946 if (verbose || bootverbose)
947 log(LOG_DEBUG, "kbdc: RESET_AUX status:%04x\n", c);
948 if (c != PSM_RESET_DONE) /* reset status */
949 return FALSE;
950
951 c = read_aux_data(p); /* device ID */
952 if (verbose || bootverbose)
953 log(LOG_DEBUG, "kbdc: RESET_AUX ID:%04x\n", c);
954 /* NOTE: we could check the device ID now, but leave it later... */
955 return TRUE;
956 }
957
958 /* controller diagnostics and setup */
959
960 int
961 test_controller(KBDC p)
962 {
963 int retry = KBD_MAXRETRY;
964 int again = KBD_MAXWAIT;
965 int c = KBD_DIAG_FAIL;
966
967 while (retry-- > 0) {
968 empty_both_buffers(p, 10);
969 if (write_controller_command(p, KBDC_DIAGNOSE))
970 break;
971 }
972 if (retry < 0)
973 return FALSE;
974
975 emptyq(&kbdcp(p)->kbd);
976 while (again-- > 0) {
977 /* wait awhile */
978 DELAY(KBD_RESETDELAY*1000);
979 c = read_controller_data(p); /* DIAG_DONE/DIAG_FAIL */
980 if (c != -1) /* wait again if the controller is not ready */
981 break;
982 }
983 if (verbose || bootverbose)
984 log(LOG_DEBUG, "kbdc: DIAGNOSE status:%04x\n", c);
985 return (c == KBD_DIAG_DONE);
986 }
987
988 int
989 test_kbd_port(KBDC p)
990 {
991 int retry = KBD_MAXRETRY;
992 int again = KBD_MAXWAIT;
993 int c = -1;
994
995 while (retry-- > 0) {
996 empty_both_buffers(p, 10);
997 if (write_controller_command(p, KBDC_TEST_KBD_PORT))
998 break;
999 }
1000 if (retry < 0)
1001 return FALSE;
1002
1003 emptyq(&kbdcp(p)->kbd);
1004 while (again-- > 0) {
1005 c = read_controller_data(p);
1006 if (c != -1) /* try again if the controller is not ready */
1007 break;
1008 }
1009 if (verbose || bootverbose)
1010 log(LOG_DEBUG, "kbdc: TEST_KBD_PORT status:%04x\n", c);
1011 return c;
1012 }
1013
1014 int
1015 test_aux_port(KBDC p)
1016 {
1017 int retry = KBD_MAXRETRY;
1018 int again = KBD_MAXWAIT;
1019 int c = -1;
1020
1021 while (retry-- > 0) {
1022 empty_both_buffers(p, 10);
1023 if (write_controller_command(p, KBDC_TEST_AUX_PORT))
1024 break;
1025 }
1026 if (retry < 0)
1027 return FALSE;
1028
1029 emptyq(&kbdcp(p)->kbd);
1030 while (again-- > 0) {
1031 c = read_controller_data(p);
1032 if (c != -1) /* try again if the controller is not ready */
1033 break;
1034 }
1035 if (verbose || bootverbose)
1036 log(LOG_DEBUG, "kbdc: TEST_AUX_PORT status:%04x\n", c);
1037 return c;
1038 }
1039
1040 int
1041 kbdc_get_device_mask(KBDC p)
1042 {
1043 return kbdcp(p)->command_mask;
1044 }
1045
1046 void
1047 kbdc_set_device_mask(KBDC p, int mask)
1048 {
1049 kbdcp(p)->command_mask =
1050 mask & (KBD_KBD_CONTROL_BITS | KBD_AUX_CONTROL_BITS);
1051 }
1052
1053 int
1054 get_controller_command_byte(KBDC p)
1055 {
1056 if (kbdcp(p)->command_byte != -1)
1057 return kbdcp(p)->command_byte;
1058 if (!write_controller_command(p, KBDC_GET_COMMAND_BYTE))
1059 return -1;
1060 emptyq(&kbdcp(p)->kbd);
1061 kbdcp(p)->command_byte = read_controller_data(p);
1062 return kbdcp(p)->command_byte;
1063 }
1064
1065 int
1066 set_controller_command_byte(KBDC p, int mask, int command)
1067 {
1068 if (get_controller_command_byte(p) == -1)
1069 return FALSE;
1070
1071 command = (kbdcp(p)->command_byte & ~mask) | (command & mask);
1072 if (command & KBD_DISABLE_KBD_PORT) {
1073 if (!write_controller_command(p, KBDC_DISABLE_KBD_PORT))
1074 return FALSE;
1075 }
1076 if (!write_controller_command(p, KBDC_SET_COMMAND_BYTE))
1077 return FALSE;
1078 if (!write_controller_data(p, command))
1079 return FALSE;
1080 kbdcp(p)->command_byte = command;
1081
1082 if (verbose)
1083 log(LOG_DEBUG, "kbdc: new command byte:%04x (set_controller...)\n",
1084 command);
1085
1086 return TRUE;
1087 }
Cache object: 536738a715feeda0b05e6be201f4b26d
|