summaryrefslogtreecommitdiff
path: root/i386/i386at/kd_event.c
blob: 694c165ee615ed8b8796191fb21113e3309dfc64 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
/*
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/* **********************************************************************
 File:         kd_event.c
 Description:  Driver for event interface to keyboard.

 $ Header: $

 Copyright Ing. C. Olivetti & C. S.p.A. 1989.  All rights reserved.
********************************************************************** */
/*
  Copyright 1988, 1989 by Olivetti Advanced Technology Center, Inc.,
Cupertino, California.

		All Rights Reserved

  Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appears in all
copies and that both the copyright notice and this permission notice
appear in supporting documentation, and that the name of Olivetti
not be used in advertising or publicity pertaining to distribution
of the software without specific, written prior permission.

  OLIVETTI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
IN NO EVENT SHALL OLIVETTI BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION
WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include <mach/boolean.h>
#include <sys/types.h>
#include <kern/printf.h>
#include <string.h>

#include <device/ds_routines.h>
#include <device/device_types.h>
#include <device/io_req.h>
#include <i386/machspl.h>
#include <i386/pio.h>
#include <i386at/kd.h>
#include <i386at/kd_queue.h>

#include "kd_event.h"

/*
 * Code for /dev/kbd.   The interrupt processing is done in kd.c,
 * which calls into this module to enqueue scancode events when
 * the keyboard is in Event mode.
 */

/*
 * Note: These globals are protected by raising the interrupt level
 * via SPLKD.
 */

kd_event_queue kbd_queue;		/* queue of keyboard events */
queue_head_t	kbd_read_queue = { &kbd_read_queue, &kbd_read_queue };

static boolean_t initialized = FALSE;


/*
 * kbdinit - set up event queue.
 */

void
kbdinit(void)
{
	spl_t s = SPLKD();

	if (!initialized) {
		kdq_reset(&kbd_queue);
		initialized = TRUE;
	}
	splx(s);
}


/*
 * kbdopen - Verify that open is read-only and remember process
 * group leader.
 */

/*ARGSUSED*/
int
kbdopen(dev, flags, ior)
	dev_t dev;
	int flags;
	io_req_t ior;
{
	spl_t o_pri = spltty();
	kdinit();
	splx(o_pri);
	kbdinit();

	return(0);
}


/*
 * kbdclose - Make sure that the kd driver is in Ascii mode and
 * reset various flags.
 */

/*ARGSUSED*/
void
kbdclose(
	dev_t 	dev,
	int 	flags)
{
	spl_t s = SPLKD();

	kb_mode = KB_ASCII;
	kdq_reset(&kbd_queue);
	splx(s);
}


io_return_t kbdgetstat(
	dev_t		dev,
	int		flavor,
	int *		data,		/* pointer to OUT array */
	unsigned int	*count)		/* OUT */
{
	switch (flavor) {
	    case KDGKBDTYPE:
		*data = KB_VANILLAKB;
		*count = 1;
		break;
	    case DEV_GET_SIZE:
		data[DEV_GET_SIZE_DEVICE_SIZE] = 0;
		data[DEV_GET_SIZE_RECORD_SIZE] = sizeof(kd_event);
		*count = DEV_GET_SIZE_COUNT;
		break;
	    default:
		return (D_INVALID_OPERATION);
	}
	return (D_SUCCESS);
}

io_return_t kbdsetstat(
	dev_t		dev,
	int		flavor,
	int *		data,
	unsigned int	count)
{
	switch (flavor) {
	    case KDSKBDMODE:
		kb_mode = *data;
		/* XXX - what to do about unread events? */
		/* XXX - should check that 'data' contains an OK valud */
		break;
   	   case KDSETLEDS:
	        if (count != 1)
	            return (D_INVALID_OPERATION);
		kd_setleds1 (*data);
		break;
	    case K_X_KDB_ENTER:
		return X_kdb_enter_init((unsigned int *)data, count);
	    case K_X_KDB_EXIT:
		return X_kdb_exit_init((unsigned int *)data, count);
	    default:
		return (D_INVALID_OPERATION);
	}
	return (D_SUCCESS);
}



/*
 * kbdread - dequeue and return any queued events.
 */
int
kbdread(
	dev_t		dev,
	io_req_t	ior)
{
	int		err, count;
	spl_t		s;

	/* Check if IO_COUNT is a multiple of the record size. */
	if (ior->io_count % sizeof(kd_event) != 0)
	    return D_INVALID_SIZE;

	err = device_read_alloc(ior, (vm_size_t)ior->io_count);
	if (err != KERN_SUCCESS)
	    return (err);

	s = SPLKD();
	if (kdq_empty(&kbd_queue)) {
	    if (ior->io_mode & D_NOWAIT) {
		splx(s);
		return (D_WOULD_BLOCK);
	    }
	    ior->io_done = kbd_read_done;
	    enqueue_tail(&kbd_read_queue, (queue_entry_t) ior);
	    splx(s);
	    return (D_IO_QUEUED);
	}
	count = 0;
	while (!kdq_empty(&kbd_queue) && count < ior->io_count) {
	    kd_event *ev;

	    ev = kdq_get(&kbd_queue);
	    *(kd_event *)(&ior->io_data[count]) = *ev;
	    count += sizeof(kd_event);
	}
	splx(s);
	ior->io_residual = ior->io_count - count;
	return (D_SUCCESS);
}

boolean_t kbd_read_done(io_req_t ior)
{
	int		count;
	spl_t		s;

	s = SPLKD();
	if (kdq_empty(&kbd_queue)) {
	    ior->io_done = kbd_read_done;
	    enqueue_tail(&kbd_read_queue, (queue_entry_t)ior);
	    splx(s);
	    return (FALSE);
	}

	count = 0;
	while (!kdq_empty(&kbd_queue) && count < ior->io_count) {
	    kd_event *ev;

	    ev = kdq_get(&kbd_queue);
	    *(kd_event *)(&ior->io_data[count]) = *ev;
	    count += sizeof(kd_event);
	}
	splx(s);

	ior->io_residual = ior->io_count - count;
	ds_read_done(ior);

	return (TRUE);
}



/*
 * kd_enqsc - enqueue a scancode.  Should be called at SPLKD.
 */

void
kd_enqsc(Scancode sc)
{
	kd_event ev;

	ev.type = KEYBD_EVENT;
	ev.time = time;
	ev.value.sc = sc;
	kbd_enqueue(&ev);
}


/*
 * kbd_enqueue - enqueue an event and wake up selecting processes, if
 * any.  Should be called at SPLKD.
 */

void
kbd_enqueue(kd_event *ev)
{
	if (kdq_full(&kbd_queue))
		printf_once("kbd: queue full\n");
	else
		kdq_put(&kbd_queue, ev);

	{
	    io_req_t	ior;
	    while ((ior = (io_req_t)dequeue_head(&kbd_read_queue)) != 0)
		iodone(ior);
	}
}

u_int X_kdb_enter_str[512], X_kdb_exit_str[512];
int   X_kdb_enter_len = 0,  X_kdb_exit_len = 0;

void
kdb_in_out(p)
const u_int *p;
{
	int t = p[0];

	switch (t & K_X_TYPE) {
		case K_X_IN|K_X_BYTE:
			inb(t & K_X_PORT);
			break;

		case K_X_IN|K_X_WORD:
			inw(t & K_X_PORT);
			break;

		case K_X_IN|K_X_LONG:
			inl(t & K_X_PORT);
			break;

		case K_X_OUT|K_X_BYTE:
			outb(t & K_X_PORT, p[1]);
			break;

		case K_X_OUT|K_X_WORD:
			outw(t & K_X_PORT, p[1]);
			break;

		case K_X_OUT|K_X_LONG:
			outl(t & K_X_PORT, p[1]);
			break;
	}
}

void
X_kdb_enter(void)
{
	u_int *u_ip, *endp;

	for (u_ip = X_kdb_enter_str, endp = &X_kdb_enter_str[X_kdb_enter_len];
	     u_ip < endp;
	     u_ip += 2)
	    kdb_in_out(u_ip);
}

void
X_kdb_exit(void)
{
	u_int *u_ip, *endp;

	for (u_ip = X_kdb_exit_str, endp = &X_kdb_exit_str[X_kdb_exit_len];
	     u_ip < endp;
	     u_ip += 2)
	   kdb_in_out(u_ip);
}

io_return_t
X_kdb_enter_init(
    u_int *data,
    u_int count)
{
    if (count * sizeof X_kdb_enter_str[0] > sizeof X_kdb_enter_str)
	return D_INVALID_OPERATION;

    memcpy(X_kdb_enter_str, data, count * sizeof X_kdb_enter_str[0]);
    X_kdb_enter_len = count;
    return D_SUCCESS;
}

io_return_t
X_kdb_exit_init(
    u_int *data,
    u_int count)
{
    if (count * sizeof X_kdb_exit_str[0] > sizeof X_kdb_exit_str)
	return D_INVALID_OPERATION;

    memcpy(X_kdb_exit_str, data, count * sizeof X_kdb_exit_str[0]);
    X_kdb_exit_len = count;
    return D_SUCCESS;
}