1 /* $NetBSD: opms.c,v 1.26 2021/09/26 16:36:18 thorpej Exp $ */
2 /* $OpenBSD: pccons.c,v 1.22 1999/01/30 22:39:37 imp Exp $ */
3 /* NetBSD: pms.c,v 1.21 1995/04/18 02:25:18 mycroft Exp */
4
5 /*-
6 * Copyright (c) 1990 The Regents of the University of California.
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * William Jolitz and Don Ahn.
11 *
12 * Copyright (c) 1994 Charles M. Hannum.
13 * Copyright (c) 1992, 1993 Erik Forsberg.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 * @(#)pccons.c 5.11 (Berkeley) 5/21/91
40 */
41
42 /*-
43 * Copyright (c) 1993, 1994, 1995 Charles M. Hannum. All rights reserved.
44 *
45 * This code is derived from software contributed to Berkeley by
46 * William Jolitz and Don Ahn.
47 *
48 * Copyright (c) 1994 Charles M. Hannum.
49 * Copyright (c) 1992, 1993 Erik Forsberg.
50 *
51 * Redistribution and use in source and binary forms, with or without
52 * modification, are permitted provided that the following conditions
53 * are met:
54 * 1. Redistributions of source code must retain the above copyright
55 * notice, this list of conditions and the following disclaimer.
56 * 2. Redistributions in binary form must reproduce the above copyright
57 * notice, this list of conditions and the following disclaimer in the
58 * documentation and/or other materials provided with the distribution.
59 * 3. All advertising materials mentioning features or use of this software
60 * must display the following acknowledgement:
61 * This product includes software developed by the University of
62 * California, Berkeley and its contributors.
63 * 4. Neither the name of the University nor the names of its contributors
64 * may be used to endorse or promote products derived from this software
65 * without specific prior written permission.
66 *
67 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
68 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
69 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
70 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
71 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
72 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
73 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
74 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
75 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
76 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
77 * SUCH DAMAGE.
78 *
79 * @(#)pccons.c 5.11 (Berkeley) 5/21/91
80 */
81
82 #include <sys/cdefs.h>
83 __KERNEL_RCSID(0, "$NetBSD: opms.c,v 1.26 2021/09/26 16:36:18 thorpej Exp $");
84
85 #include <sys/param.h>
86 #include <sys/systm.h>
87 #include <sys/vnode.h>
88 #include <sys/poll.h>
89 #include <sys/tty.h>
90 #include <sys/device.h>
91 #include <sys/proc.h>
92 #include <sys/conf.h>
93
94 #include <sys/bus.h>
95 #include <machine/kbdreg.h>
96 #include <machine/mouse.h>
97
98 #include <arc/dev/pcconsvar.h>
99 #include <arc/dev/opmsvar.h>
100
101 #include "ioconf.h"
102
103 #define PMSUNIT(dev) (minor(dev))
104
105 /* status bits */
106 #define PMS_OBUF_FULL 0x01
107 #define PMS_IBUF_FULL 0x02
108
109 /* controller commands */
110 #define PMS_INT_ENABLE 0x47 /* enable controller interrupts */
111 #define PMS_INT_DISABLE 0x65 /* disable controller interrupts */
112 #define PMS_AUX_ENABLE 0xa7 /* enable auxiliary port */
113 #define PMS_AUX_DISABLE 0xa8 /* disable auxiliary port */
114 #define PMS_MAGIC_1 0xa9 /* XXX */
115
116 #define PMS_8042_CMD 0x65
117
118 /* mouse commands */
119 #define PMS_SET_SCALE11 0xe6 /* set scaling 1:1 */
120 #define PMS_SET_SCALE21 0xe7 /* set scaling 2:1 */
121 #define PMS_SET_RES 0xe8 /* set resolution */
122 #define PMS_GET_SCALE 0xe9 /* get scaling factor */
123 #define PMS_SET_STREAM 0xea /* set streaming mode */
124 #define PMS_SET_SAMPLE 0xf3 /* set sampling rate */
125 #define PMS_DEV_ENABLE 0xf4 /* mouse on */
126 #define PMS_DEV_DISABLE 0xf5 /* mouse off */
127 #define PMS_RESET 0xff /* reset */
128
129 #define PMS_CHUNK 128 /* chunk size for read */
130 #define PMS_BSIZE 1020 /* buffer size */
131
132 #define FLUSHQ(q) { if((q)->c_cc) ndflush(q, (q)->c_cc); }
133
134 dev_type_open(opmsopen);
135 dev_type_close(opmsclose);
136 dev_type_read(opmsread);
137 dev_type_ioctl(opmsioctl);
138 dev_type_poll(opmspoll);
139 dev_type_kqfilter(opmskqfilter);
140
141 const struct cdevsw opms_cdevsw = {
142 .d_open = opmsopen,
143 .d_close = opmsclose,
144 .d_read = opmsread,
145 .d_write = nowrite,
146 .d_ioctl = opmsioctl,
147 .d_stop = nostop,
148 .d_tty = notty,
149 .d_poll = opmspoll,
150 .d_mmap = nommap,
151 .d_kqfilter = opmskqfilter,
152 .d_discard = nodiscard,
153 .d_flag = 0
154 };
155
156 static inline void pms_dev_cmd(uint8_t);
157 static inline void pms_aux_cmd(uint8_t);
158 static inline void pms_pit_cmd(uint8_t);
159
160 static inline void
pms_dev_cmd(uint8_t value)161 pms_dev_cmd(uint8_t value)
162 {
163
164 kbd_flush_input();
165 kbd_cmd_write_1(0xd4);
166 kbd_flush_input();
167 kbd_data_write_1(value);
168 }
169
170 static inline void
pms_aux_cmd(uint8_t value)171 pms_aux_cmd(uint8_t value)
172 {
173
174 kbd_flush_input();
175 kbd_cmd_write_1(value);
176 }
177
178 static inline void
pms_pit_cmd(uint8_t value)179 pms_pit_cmd(uint8_t value)
180 {
181
182 kbd_flush_input();
183 kbd_cmd_write_1(0x60);
184 kbd_flush_input();
185 kbd_data_write_1(value);
186 }
187
opms_common_match(bus_space_tag_t kbd_iot,struct pccons_config * config)188 int opms_common_match(bus_space_tag_t kbd_iot, struct pccons_config *config)
189 {
190 uint8_t x;
191
192 kbd_context_init(kbd_iot, config);
193
194 pms_dev_cmd(KBC_RESET);
195 pms_aux_cmd(PMS_MAGIC_1);
196 delay(10000);
197 x = kbd_data_read_1();
198 pms_pit_cmd(PMS_INT_DISABLE);
199 if (x & 0x04)
200 return 0;
201
202 return 1;
203 }
204
205 void
opms_common_attach(struct opms_softc * sc,bus_space_tag_t opms_iot,struct pccons_config * config)206 opms_common_attach(struct opms_softc *sc, bus_space_tag_t opms_iot,
207 struct pccons_config *config)
208 {
209
210 kbd_context_init(opms_iot, config);
211 selinit(&sc->sc_rsel);
212
213 /* Other initialization was done by opmsprobe. */
214 sc->sc_state = 0;
215 }
216
217 int
opmsopen(dev_t dev,int flag,int mode,struct lwp * l)218 opmsopen(dev_t dev, int flag, int mode, struct lwp *l)
219 {
220 struct opms_softc *sc;
221
222 sc = device_lookup_private(&opms_cd, PMSUNIT(dev));
223 if (!sc)
224 return ENXIO;
225
226 if (sc->sc_state & PMS_OPEN)
227 return EBUSY;
228
229 if (clalloc(&sc->sc_q, PMS_BSIZE, 0) == -1)
230 return ENOMEM;
231
232 sc->sc_state |= PMS_OPEN;
233 sc->sc_status = 0;
234 sc->sc_x = sc->sc_y = 0;
235
236 /* Enable interrupts. */
237 pms_dev_cmd(PMS_DEV_ENABLE);
238 pms_aux_cmd(PMS_AUX_ENABLE);
239 pms_dev_cmd(PMS_SET_RES);
240 pms_dev_cmd(3); /* 8 counts/mm */
241 pms_dev_cmd(PMS_SET_SCALE21);
242 #if 0
243 pms_dev_cmd(PMS_SET_SAMPLE);
244 pms_dev_cmd(100); /* 100 samples/sec */
245 pms_dev_cmd(PMS_SET_STREAM);
246 #endif
247 pms_pit_cmd(PMS_INT_ENABLE);
248
249 return 0;
250 }
251
252 int
opmsclose(dev_t dev,int flag,int mode,struct lwp * l)253 opmsclose(dev_t dev, int flag, int mode, struct lwp *l)
254 {
255 struct opms_softc *sc = device_lookup_private(&opms_cd, PMSUNIT(dev));
256
257 /* Disable interrupts. */
258 pms_dev_cmd(PMS_DEV_DISABLE);
259 pms_pit_cmd(PMS_INT_DISABLE);
260 pms_aux_cmd(PMS_AUX_DISABLE);
261
262 sc->sc_state &= ~PMS_OPEN;
263
264 clfree(&sc->sc_q);
265
266 return 0;
267 }
268
269 int
opmsread(dev_t dev,struct uio * uio,int flag)270 opmsread(dev_t dev, struct uio *uio, int flag)
271 {
272 struct opms_softc *sc = device_lookup_private(&opms_cd, PMSUNIT(dev));
273 int s;
274 int error = 0;
275 size_t length;
276 u_char buffer[PMS_CHUNK];
277
278 /* Block until mouse activity occurred. */
279
280 s = spltty();
281 while (sc->sc_q.c_cc == 0) {
282 if (flag & IO_NDELAY) {
283 splx(s);
284 return EWOULDBLOCK;
285 }
286 sc->sc_state |= PMS_ASLP;
287 error = tsleep((void *)sc, PZERO | PCATCH, "pmsrea", 0);
288 if (error) {
289 sc->sc_state &= ~PMS_ASLP;
290 splx(s);
291 return error;
292 }
293 }
294 splx(s);
295
296 /* Transfer as many chunks as possible. */
297
298 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) {
299 length = uimin(sc->sc_q.c_cc, uio->uio_resid);
300 if (length > sizeof(buffer))
301 length = sizeof(buffer);
302
303 /* Remove a small chunk from the input queue. */
304 (void) q_to_b(&sc->sc_q, buffer, length);
305
306 /* Copy the data to the user process. */
307 error = uiomove(buffer, length, uio);
308 if (error)
309 break;
310 }
311
312 return error;
313 }
314
315 int
opmsioctl(dev_t dev,u_long cmd,void * addr,int flag,struct lwp * l)316 opmsioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
317 {
318 struct opms_softc *sc = device_lookup_private(&opms_cd, PMSUNIT(dev));
319 struct mouseinfo info;
320 int s;
321 int error;
322
323 switch (cmd) {
324 case MOUSEIOCREAD:
325 s = spltty();
326
327 info.status = sc->sc_status;
328 if (sc->sc_x || sc->sc_y)
329 info.status |= MOVEMENT;
330
331 if (sc->sc_x > 127)
332 info.xmotion = 127;
333 else if (sc->sc_x < -127)
334 /* Bounding at -127 avoids a bug in XFree86. */
335 info.xmotion = -127;
336 else
337 info.xmotion = sc->sc_x;
338
339 if (sc->sc_y > 127)
340 info.ymotion = 127;
341 else if (sc->sc_y < -127)
342 info.ymotion = -127;
343 else
344 info.ymotion = sc->sc_y;
345
346 /* Reset historical information. */
347 sc->sc_x = sc->sc_y = 0;
348 sc->sc_status &= ~BUTCHNGMASK;
349 ndflush(&sc->sc_q, sc->sc_q.c_cc);
350
351 splx(s);
352 error = copyout(&info, addr, sizeof(struct mouseinfo));
353 break;
354 default:
355 error = EINVAL;
356 break;
357 }
358
359 return error;
360 }
361
362 /* Masks for the first byte of a packet */
363 #define PS2LBUTMASK 0x01
364 #define PS2RBUTMASK 0x02
365 #define PS2MBUTMASK 0x04
366
367 int
opmsintr(void * arg)368 opmsintr(void *arg)
369 {
370 struct opms_softc *sc = arg;
371 static int state = 0;
372 static u_char buttons;
373 u_char changed;
374 static char dx, dy;
375 u_char buffer[5];
376
377 if ((sc->sc_state & PMS_OPEN) == 0) {
378 /* Interrupts are not expected. Discard the byte. */
379 kbd_flush_input();
380 return 0;
381 }
382
383 switch (state) {
384
385 case 0:
386 buttons = kbd_data_read_1();
387 if ((buttons & 0xc0) == 0)
388 ++state;
389 break;
390
391 case 1:
392 dx = kbd_data_read_1();
393 /* Bounding at -127 avoids a bug in XFree86. */
394 dx = (dx == -128) ? -127 : dx;
395 ++state;
396 break;
397
398 case 2:
399 dy = kbd_data_read_1();
400 dy = (dy == -128) ? -127 : dy;
401 state = 0;
402
403 buttons = ((buttons & PS2LBUTMASK) << 2) |
404 ((buttons & (PS2RBUTMASK | PS2MBUTMASK)) >> 1);
405 changed = ((buttons ^ sc->sc_status) & BUTSTATMASK) << 3;
406 sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) |
407 changed;
408
409 if (dx || dy || changed) {
410 /* Update accumulated movements. */
411 sc->sc_x += dx;
412 sc->sc_y += dy;
413
414 /* Add this event to the queue. */
415 buffer[0] = 0x80 | (buttons & BUTSTATMASK);
416 if(dx < 0)
417 buffer[0] |= 0x10;
418 buffer[1] = dx & 0x7f;
419 if(dy < 0)
420 buffer[0] |= 0x20;
421 buffer[2] = dy & 0x7f;
422 buffer[3] = buffer[4] = 0;
423 (void) b_to_q(buffer, sizeof buffer, &sc->sc_q);
424
425 if (sc->sc_state & PMS_ASLP) {
426 sc->sc_state &= ~PMS_ASLP;
427 wakeup((void *)sc);
428 }
429 selnotify(&sc->sc_rsel, 0, 0);
430 }
431
432 break;
433 }
434 return -1;
435 }
436
437 int
opmspoll(dev_t dev,int events,struct lwp * l)438 opmspoll(dev_t dev, int events, struct lwp *l)
439 {
440 struct opms_softc *sc = device_lookup_private(&opms_cd, PMSUNIT(dev));
441 int revents = 0;
442 int s = spltty();
443
444 if (events & (POLLIN | POLLRDNORM)) {
445 if (sc->sc_q.c_cc > 0)
446 revents |= events & (POLLIN | POLLRDNORM);
447 else
448 selrecord(l, &sc->sc_rsel);
449 }
450
451 splx(s);
452 return revents;
453 }
454
455 static void
filt_opmsrdetach(struct knote * kn)456 filt_opmsrdetach(struct knote *kn)
457 {
458 struct opms_softc *sc = kn->kn_hook;
459 int s;
460
461 s = spltty();
462 selremove_knote(&sc->sc_rsel, kn);
463 splx(s);
464 }
465
466 static int
filt_opmsread(struct knote * kn,long hint)467 filt_opmsread(struct knote *kn, long hint)
468 {
469 struct opms_softc *sc = kn->kn_hook;
470
471 kn->kn_data = sc->sc_q.c_cc;
472 return kn->kn_data > 0;
473 }
474
475 static const struct filterops opmsread_filtops = {
476 .f_flags = FILTEROP_ISFD,
477 .f_attach = NULL,
478 .f_detach = filt_opmsrdetach,
479 .f_event = filt_opmsread,
480 };
481
482 int
opmskqfilter(dev_t dev,struct knote * kn)483 opmskqfilter(dev_t dev, struct knote *kn)
484 {
485 struct opms_softc *sc = device_lookup_private(&opms_cd, PMSUNIT(dev));
486 int s;
487
488 switch (kn->kn_filter) {
489 case EVFILT_READ:
490 kn->kn_fop = &opmsread_filtops;
491 break;
492
493 default:
494 return EINVAL;
495 }
496
497 kn->kn_hook = sc;
498
499 s = spltty();
500 selrecord_knote(&sc->sc_rsel, kn);
501 splx(s);
502
503 return 0;
504 }
505