1 /*-
2 * (MPSAFE)
3 *
4 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer as
12 * the first lines of this file unmodified.
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 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD: src/sys/dev/syscons/sysmouse.c,v 1.2.2.2 2001/07/16 05:21:24 yokota Exp $
29 */
30
31 /* MPSAFE NOTE: This file uses the tty_token mostly for the linesw access and
32 * for the internal mouse structures. The latter ones could be protected
33 * by a local lock.
34 */
35 #include "opt_syscons.h"
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/conf.h>
40 #include <sys/proc.h>
41 #include <sys/priv.h>
42 #include <sys/tty.h>
43 #include <sys/kernel.h>
44 #include <sys/thread2.h>
45
46 #include <machine/console.h>
47 #include <sys/mouse.h>
48
49 #include "syscons.h"
50
51 #ifndef SC_NO_SYSMOUSE
52
53 #define CDEV_MAJOR 12 /* major number, shared with syscons */
54 #define SC_MOUSE 128 /* minor number */
55
56 static d_open_t smopen;
57 static d_close_t smclose;
58 static d_ioctl_t smioctl;
59
60 static struct dev_ops sm_ops = {
61 { "sysmouse", 0, D_TTY },
62 .d_open = smopen,
63 .d_close = smclose,
64 .d_read = ttyread,
65 .d_ioctl = smioctl,
66 .d_kqfilter = ttykqfilter,
67 .d_revoke = ttyrevoke
68 };
69
70 /* local variables */
71 static struct tty *sysmouse_tty;
72 static int mouse_level; /* sysmouse protocol level */
73 static mousestatus_t mouse_status;
74
75 static void smstart(struct tty *tp);
76 static int smparam(struct tty *tp, struct termios *t);
77
78 static int
79 smopen(struct dev_open_args *ap)
80 {
81 cdev_t dev = ap->a_head.a_dev;
82 struct tty *tp;
83 int ret;
84
85 DPRINTF(5, ("smopen: dev:%d,%d, vty:%d\n",
86 major(dev), minor(dev), SC_VTY(dev)));
87
88 #if 0
89 if (SC_VTY(dev) != SC_MOUSE)
90 return ENXIO;
91 #endif
92
93 lwkt_gettoken(&tty_token);
94 tp = dev->si_tty = ttymalloc(dev->si_tty);
95 if (!(tp->t_state & TS_ISOPEN)) {
96 sysmouse_tty = tp;
97 tp->t_oproc = smstart;
98 tp->t_param = smparam;
99 tp->t_stop = nottystop;
100 tp->t_dev = dev;
101 ttychars(tp);
102 tp->t_iflag = 0;
103 tp->t_oflag = 0;
104 tp->t_lflag = 0;
105 tp->t_cflag = TTYDEF_CFLAG;
106 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
107 smparam(tp, &tp->t_termios);
108 (*linesw[tp->t_line].l_modem)(tp, 1);
109 } else if (tp->t_state & TS_XCLUDE && priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) {
110 lwkt_reltoken(&tty_token);
111 return EBUSY;
112 }
113
114 ret = (*linesw[tp->t_line].l_open)(dev, tp);
115 lwkt_reltoken(&tty_token);
116 return ret;
117 }
118
119 static int
120 smclose(struct dev_close_args *ap)
121 {
122 cdev_t dev = ap->a_head.a_dev;
123 struct tty *tp;
124
125 tp = dev->si_tty;
126 crit_enter();
127 lwkt_gettoken(&tty_token);
128 mouse_level = 0;
129 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
130 ttyclose(tp);
131 lwkt_reltoken(&tty_token);
132 crit_exit();
133
134 return 0;
135 }
136
137 static void
138 smstart(struct tty *tp)
139 {
140 struct clist *rbp;
141 u_char buf[PCBURST];
142
143 crit_enter();
144 lwkt_gettoken(&tty_token);
145 if (!(tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))) {
146 tp->t_state |= TS_BUSY;
147 rbp = &tp->t_outq;
148 while (rbp->c_cc)
149 q_to_b(rbp, buf, PCBURST);
150 tp->t_state &= ~TS_BUSY;
151 ttwwakeup(tp);
152 }
153 lwkt_reltoken(&tty_token);
154 crit_exit();
155 }
156
157 static int
158 smparam(struct tty *tp, struct termios *t)
159 {
160 lwkt_gettoken(&tty_token);
161 tp->t_ispeed = t->c_ispeed;
162 tp->t_ospeed = t->c_ospeed;
163 tp->t_cflag = t->c_cflag;
164 lwkt_reltoken(&tty_token);
165 return 0;
166 }
167
168 static int
169 smioctl(struct dev_ioctl_args *ap)
170 {
171 cdev_t dev = ap->a_head.a_dev;
172 struct tty *tp;
173 mousehw_t *hw;
174 mousemode_t *mode;
175 int error;
176
177 lwkt_gettoken(&tty_token);
178 tp = dev->si_tty;
179
180 switch (ap->a_cmd) {
181 case MOUSE_GETHWINFO: /* get device information */
182 hw = (mousehw_t *)ap->a_data;
183 hw->buttons = 10; /* XXX unknown */
184 hw->iftype = MOUSE_IF_SYSMOUSE;
185 hw->type = MOUSE_MOUSE;
186 hw->model = MOUSE_MODEL_GENERIC;
187 hw->hwid = 0;
188 lwkt_reltoken(&tty_token);
189 return 0;
190
191 case MOUSE_GETMODE: /* get protocol/mode */
192 mode = (mousemode_t *)ap->a_data;
193 mode->level = mouse_level;
194 switch (mode->level) {
195 case 0: /* emulate MouseSystems protocol */
196 mode->protocol = MOUSE_PROTO_MSC;
197 mode->rate = -1; /* unknown */
198 mode->resolution = -1; /* unknown */
199 mode->accelfactor = 0; /* disabled */
200 mode->packetsize = MOUSE_MSC_PACKETSIZE;
201 mode->syncmask[0] = MOUSE_MSC_SYNCMASK;
202 mode->syncmask[1] = MOUSE_MSC_SYNC;
203 break;
204
205 case 1: /* sysmouse protocol */
206 mode->protocol = MOUSE_PROTO_SYSMOUSE;
207 mode->rate = -1;
208 mode->resolution = -1;
209 mode->accelfactor = 0;
210 mode->packetsize = MOUSE_SYS_PACKETSIZE;
211 mode->syncmask[0] = MOUSE_SYS_SYNCMASK;
212 mode->syncmask[1] = MOUSE_SYS_SYNC;
213 break;
214 }
215 lwkt_reltoken(&tty_token);
216 return 0;
217
218 case MOUSE_SETMODE: /* set protocol/mode */
219 mode = (mousemode_t *)ap->a_data;
220 if (mode->level == -1)
221 ; /* don't change the current setting */
222 else if ((mode->level < 0) || (mode->level > 1)) {
223 lwkt_reltoken(&tty_token);
224 return EINVAL;
225 } else {
226 mouse_level = mode->level;
227 }
228 lwkt_reltoken(&tty_token);
229 return 0;
230
231 case MOUSE_GETLEVEL: /* get operation level */
232 *(int *)ap->a_data = mouse_level;
233 lwkt_reltoken(&tty_token);
234 return 0;
235
236 case MOUSE_SETLEVEL: /* set operation level */
237 if ((*(int *)ap->a_data < 0) || (*(int *)ap->a_data > 1)) {
238 lwkt_reltoken(&tty_token);
239 return EINVAL;
240 }
241 mouse_level = *(int *)ap->a_data;
242 lwkt_reltoken(&tty_token);
243 return 0;
244
245 case MOUSE_GETSTATUS: /* get accumulated mouse events */
246 crit_enter();
247 *(mousestatus_t *)ap->a_data = mouse_status;
248 mouse_status.flags = 0;
249 mouse_status.obutton = mouse_status.button;
250 mouse_status.dx = 0;
251 mouse_status.dy = 0;
252 mouse_status.dz = 0;
253 crit_exit();
254 lwkt_reltoken(&tty_token);
255 return 0;
256
257 #if 0 /* notyet */
258 case MOUSE_GETVARS: /* get internal mouse variables */
259 case MOUSE_SETVARS: /* set internal mouse variables */
260 lwkt_reltoken(&tty_token);
261 return ENODEV;
262 #endif
263
264 case MOUSE_READSTATE: /* read status from the device */
265 case MOUSE_READDATA: /* read data from the device */
266 lwkt_reltoken(&tty_token);
267 return ENODEV;
268 }
269
270 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data, ap->a_fflag, ap->a_cred);
271 if (error != ENOIOCTL) {
272 lwkt_reltoken(&tty_token);
273 return error;
274 }
275 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
276 if (error != ENOIOCTL) {
277 lwkt_reltoken(&tty_token);
278 return error;
279 }
280 lwkt_reltoken(&tty_token);
281 return ENOTTY;
282 }
283
284 static void
285 sm_attach_mouse(void *unused)
286 {
287 cdev_t dev;
288
289 dev = make_dev(&sm_ops, SC_MOUSE, UID_ROOT, GID_WHEEL,
290 0600, "sysmouse");
291 /* sysmouse doesn't have scr_stat */
292 }
293
294 SYSINIT(sysmouse, SI_SUB_DRIVERS, SI_ORDER_MIDDLE + CDEV_MAJOR,
295 sm_attach_mouse, NULL)
296
297 int
298 sysmouse_event(mouse_info_t *info)
299 {
300 /* MOUSE_BUTTON?DOWN -> MOUSE_MSC_BUTTON?UP */
301 static int butmap[8] = {
302 MOUSE_MSC_BUTTON1UP | MOUSE_MSC_BUTTON2UP | MOUSE_MSC_BUTTON3UP,
303 MOUSE_MSC_BUTTON2UP | MOUSE_MSC_BUTTON3UP,
304 MOUSE_MSC_BUTTON1UP | MOUSE_MSC_BUTTON3UP,
305 MOUSE_MSC_BUTTON3UP,
306 MOUSE_MSC_BUTTON1UP | MOUSE_MSC_BUTTON2UP,
307 MOUSE_MSC_BUTTON2UP,
308 MOUSE_MSC_BUTTON1UP,
309 0,
310 };
311 u_char buf[8];
312 int x, y, z;
313 int i;
314
315 lwkt_gettoken(&tty_token);
316 switch (info->operation) {
317 case MOUSE_ACTION:
318 mouse_status.button = info->u.data.buttons;
319 /* FALL THROUGH */
320 case MOUSE_MOTION_EVENT:
321 x = info->u.data.x;
322 y = info->u.data.y;
323 z = info->u.data.z;
324 break;
325 case MOUSE_BUTTON_EVENT:
326 x = y = z = 0;
327 if (info->u.event.value > 0)
328 mouse_status.button |= info->u.event.id;
329 else
330 mouse_status.button &= ~info->u.event.id;
331 break;
332 default:
333 lwkt_reltoken(&tty_token);
334 return 0;
335 }
336
337 mouse_status.dx += x;
338 mouse_status.dy += y;
339 mouse_status.dz += z;
340 mouse_status.flags |= ((x || y || z) ? MOUSE_POSCHANGED : 0)
341 | (mouse_status.obutton ^ mouse_status.button);
342 if (mouse_status.flags == 0) {
343 lwkt_reltoken(&tty_token);
344 return 0;
345 }
346
347 if ((sysmouse_tty == NULL) || !(sysmouse_tty->t_state & TS_ISOPEN)) {
348 lwkt_reltoken(&tty_token);
349 return mouse_status.flags;
350 }
351
352 /* the first five bytes are compatible with MouseSystems' */
353 buf[0] = MOUSE_MSC_SYNC
354 | butmap[mouse_status.button & MOUSE_STDBUTTONS];
355 x = imax(imin(x, 255), -256);
356 buf[1] = x >> 1;
357 buf[3] = x - buf[1];
358 y = -imax(imin(y, 255), -256);
359 buf[2] = y >> 1;
360 buf[4] = y - buf[2];
361 for (i = 0; i < MOUSE_MSC_PACKETSIZE; ++i)
362 (*linesw[sysmouse_tty->t_line].l_rint)(buf[i], sysmouse_tty);
363 if (mouse_level >= 1) {
364 /* extended part */
365 z = imax(imin(z, 127), -128);
366 buf[5] = (z >> 1) & 0x7f;
367 buf[6] = (z - (z >> 1)) & 0x7f;
368 /* buttons 4-10 */
369 buf[7] = (~mouse_status.button >> 3) & 0x7f;
370 for (i = MOUSE_MSC_PACKETSIZE; i < MOUSE_SYS_PACKETSIZE; ++i)
371 (*linesw[sysmouse_tty->t_line].l_rint)(buf[i],
372 sysmouse_tty);
373 }
374
375 lwkt_reltoken(&tty_token);
376 return mouse_status.flags;
377 }
378
379 #endif /* !SC_NO_SYSMOUSE */
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