1 /* $OpenBSD: lms.c,v 1.22 2022/02/21 10:24:28 mpi Exp $ */
2 /* $NetBSD: lms.c,v 1.38 2000/01/08 02:57:25 takemura Exp $ */
3
4 /*-
5 * Copyright (c) 1993, 1994 Charles M. Hannum.
6 * Copyright (c) 1992, 1993 Erik Forsberg.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
17 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
18 * NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
22 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
23 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
24 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/param.h>
28 #include <sys/systm.h>
29 #include <sys/ioctl.h>
30 #include <sys/device.h>
31
32 #include <machine/bus.h>
33 #include <machine/intr.h>
34
35 #include <dev/isa/isavar.h>
36
37 #include <dev/wscons/wsconsio.h>
38 #include <dev/wscons/wsmousevar.h>
39
40 #define LMS_DATA 0 /* offset for data port, read-only */
41 #define LMS_SIGN 1 /* offset for signature port, read-write */
42 #define LMS_INTR 2 /* offset for interrupt port, read-only */
43 #define LMS_CNTRL 2 /* offset for control port, write-only */
44 #define LMS_CONFIG 3 /* for configuration port, read-write */
45 #define LMS_NPORTS 4
46
47 struct lms_softc { /* driver status information */
48 struct device sc_dev;
49 void *sc_ih;
50
51 bus_space_tag_t sc_iot; /* bus i/o space identifier */
52 bus_space_handle_t sc_ioh; /* bus i/o handle */
53
54 int sc_enabled; /* device is open */
55 int oldbuttons; /* mouse button status */
56
57 struct device *sc_wsmousedev;
58 };
59
60 int lmsprobe(struct device *, void *, void *);
61 void lmsattach(struct device *, struct device *, void *);
62 int lmsintr(void *);
63
64 const struct cfattach lms_ca = {
65 sizeof(struct lms_softc), lmsprobe, lmsattach
66 };
67
68 int lms_enable(void *);
69 int lms_ioctl(void *, u_long, caddr_t, int, struct proc *);
70 void lms_disable(void *);
71
72 const struct wsmouse_accessops lms_accessops = {
73 lms_enable,
74 lms_ioctl,
75 lms_disable,
76 };
77
78 int
lmsprobe(struct device * parent,void * match,void * aux)79 lmsprobe(struct device *parent, void *match, void *aux)
80 {
81 struct isa_attach_args *ia = aux;
82 bus_space_tag_t iot = ia->ia_iot;
83 bus_space_handle_t ioh;
84 int rv;
85
86 /* Disallow wildcarded i/o base. */
87 if (ia->ia_iobase == IOBASEUNK)
88 return 0;
89
90 /* Map the i/o space. */
91 if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh))
92 return 0;
93
94 rv = 0;
95
96 /* Configure and check for port present. */
97 bus_space_write_1(iot, ioh, LMS_CONFIG, 0x91);
98 delay(10);
99 bus_space_write_1(iot, ioh, LMS_SIGN, 0x0c);
100 delay(10);
101 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x0c)
102 goto out;
103 bus_space_write_1(iot, ioh, LMS_SIGN, 0x50);
104 delay(10);
105 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x50)
106 goto out;
107
108 /* Disable interrupts. */
109 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x10);
110
111 rv = 1;
112 ia->ia_iosize = LMS_NPORTS;
113 ia->ia_msize = 0;
114
115 out:
116 bus_space_unmap(iot, ioh, LMS_NPORTS);
117 return rv;
118 }
119
120 void
lmsattach(struct device * parent,struct device * self,void * aux)121 lmsattach(struct device *parent, struct device *self, void *aux)
122 {
123 struct lms_softc *sc = (void *)self;
124 struct isa_attach_args *ia = aux;
125 bus_space_tag_t iot = ia->ia_iot;
126 bus_space_handle_t ioh;
127 struct wsmousedev_attach_args a;
128
129 printf("\n");
130
131 if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) {
132 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
133 return;
134 }
135
136 /* Other initialization was done by lmsprobe. */
137 sc->sc_iot = iot;
138 sc->sc_ioh = ioh;
139 sc->sc_enabled = 0;
140
141 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE,
142 IPL_TTY, lmsintr, sc, sc->sc_dev.dv_xname);
143
144 a.accessops = &lms_accessops;
145 a.accesscookie = sc;
146
147 /*
148 * Attach the wsmouse, saving a handle to it.
149 * Note that we don't need to check this pointer against NULL
150 * here or in psmintr, because if this fails lms_enable() will
151 * never be called, so lmsintr() will never be called.
152 */
153 sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint);
154 }
155
156 int
lms_enable(void * v)157 lms_enable(void *v)
158 {
159 struct lms_softc *sc = v;
160
161 if (sc->sc_enabled)
162 return EBUSY;
163
164 sc->sc_enabled = 1;
165 sc->oldbuttons = 0;
166
167 /* Enable interrupts. */
168 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0);
169
170 return 0;
171 }
172
173 void
lms_disable(void * v)174 lms_disable(void *v)
175 {
176 struct lms_softc *sc = v;
177
178 /* Disable interrupts. */
179 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10);
180
181 sc->sc_enabled = 0;
182 }
183
184 int
lms_ioctl(void * v,u_long cmd,caddr_t data,int flag,struct proc * p)185 lms_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)
186 {
187 #if 0
188 struct lms_softc *sc = v;
189 #endif
190
191 switch (cmd) {
192 case WSMOUSEIO_GTYPE:
193 *(u_int *)data = WSMOUSE_TYPE_LMS;
194 return (0);
195 }
196 return (-1);
197 }
198
199 int
lmsintr(void * arg)200 lmsintr(void *arg)
201 {
202 struct lms_softc *sc = arg;
203 bus_space_tag_t iot = sc->sc_iot;
204 bus_space_handle_t ioh = sc->sc_ioh;
205 u_char hi, lo;
206 signed char dx, dy;
207 u_int buttons;
208 int changed;
209
210 if (!sc->sc_enabled)
211 /* Interrupts are not expected. */
212 return 0;
213
214 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab);
215 hi = bus_space_read_1(iot, ioh, LMS_DATA);
216 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90);
217 lo = bus_space_read_1(iot, ioh, LMS_DATA);
218 dx = ((hi & 0x0f) << 4) | (lo & 0x0f);
219 /* Bounding at -127 avoids a bug in XFree86. */
220 dx = (dx == -128) ? -127 : dx;
221
222 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0);
223 hi = bus_space_read_1(iot, ioh, LMS_DATA);
224 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0);
225 lo = bus_space_read_1(iot, ioh, LMS_DATA);
226 dy = ((hi & 0x0f) << 4) | (lo & 0x0f);
227 dy = (dy == -128) ? 127 : -dy;
228
229 bus_space_write_1(iot, ioh, LMS_CNTRL, 0);
230
231 buttons = ((hi & 0x80) ? 0 : 0x1) |
232 ((hi & 0x40) ? 0 : 0x2) |
233 ((hi & 0x20) ? 0 : 0x4);
234 changed = (buttons ^ sc->oldbuttons);
235 sc->oldbuttons = buttons;
236
237 if (dx || dy || changed)
238 WSMOUSE_INPUT(sc->sc_wsmousedev, buttons, dx, dy, 0, 0);
239
240 return -1;
241 }
242
243 struct cfdriver lms_cd = {
244 NULL, "lms", DV_DULL
245 };
246