1 /* $NetBSD: qms.c,v 1.22 2022/09/27 06:36:42 skrll Exp $ */
2
3 /*-
4 * Copyright (c) 2001 Reinoud Zandijk
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Reinoud Zandijk
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31 /*
32 * Quadrature mouse driver for the wscons as used in the IOMD
33 */
34
35 #include <sys/param.h>
36
37 __KERNEL_RCSID(0, "$NetBSD: qms.c,v 1.22 2022/09/27 06:36:42 skrll Exp $");
38
39 #include <sys/callout.h>
40 #include <sys/device.h>
41 #include <sys/errno.h>
42 #include <sys/ioctl.h>
43 #include <sys/kernel.h>
44 #include <sys/proc.h>
45 #include <sys/tty.h>
46 #include <sys/types.h>
47 #include <sys/syslog.h>
48 #include <sys/systm.h>
49 #include <sys/select.h>
50
51 #include <sys/bus.h>
52 #include <machine/intr.h>
53
54 #include <arm/iomd/iomdvar.h>
55
56 #include <dev/wscons/wsconsio.h>
57 #include <dev/wscons/wsmousevar.h>
58
59 struct qms_softc {
60 device_t sc_dev;
61 device_t sc_wsmousedev;
62
63 bus_space_tag_t sc_iot; /* bus tag */
64 bus_space_handle_t sc_ioh; /* bus handle for XY */
65 bus_space_handle_t sc_butioh; /* bus handle for buttons */
66
67 struct callout sc_callout;
68
69 uint16_t lastx;
70 uint16_t lasty;
71 int lastb;
72 };
73
74 /* Offsets of hardware registers */
75 #define QMS_MOUSEX 0 /* 16 bits X register */
76 #define QMS_MOUSEY 1 /* 16 bits Y register */
77 #define QMS_BUTTONS 0 /* mouse buttons in bits 4,5,6 */
78
79 static int qms_match(device_t , cfdata_t , void *);
80 static void qms_attach(device_t , device_t , void *);
81
82 static int qms_enable(void *);
83 static int qms_ioctl(void *, u_long, void *, int, struct lwp *);
84 static void qms_disable(void *cookie);
85 static void qms_intr(void *arg);
86
87 CFATTACH_DECL_NEW(qms, sizeof(struct qms_softc),
88 qms_match, qms_attach, NULL, NULL);
89
90 static struct wsmouse_accessops qms_accessops = {
91 qms_enable, qms_ioctl, qms_disable
92 };
93
94
95 static int
qms_match(device_t parent,cfdata_t cf,void * aux)96 qms_match(device_t parent, cfdata_t cf, void *aux)
97 {
98 struct qms_attach_args *qa = aux;
99
100 if (strcmp(qa->qa_name, "qms") == 0)
101 return 1;
102
103 return 0;
104 }
105
106
107 static void
qms_attach(device_t parent,device_t self,void * aux)108 qms_attach(device_t parent, device_t self, void *aux)
109 {
110 struct qms_softc *sc = device_private(self);
111 struct qms_attach_args *qa = aux;
112 struct wsmousedev_attach_args wsmouseargs;
113
114 sc->sc_dev = self;
115 sc->sc_iot = qa->qa_iot;
116 sc->sc_ioh = qa->qa_ioh;
117 sc->sc_butioh = qa->qa_ioh_but;
118
119 /* set up wsmouse attach arguments */
120 wsmouseargs.accessops = &qms_accessops;
121 wsmouseargs.accesscookie = sc;
122
123 aprint_normal("\n");
124
125 sc->sc_wsmousedev =
126 config_found(sc->sc_dev, &wsmouseargs, wsmousedevprint, CFARGS_NONE);
127
128 callout_init(&sc->sc_callout, 0);
129 }
130
131
132 static int
qms_enable(void * cookie)133 qms_enable(void *cookie)
134 {
135 struct qms_softc *sc = cookie;
136 int b;
137
138 /* We don't want the mouse to warp on open. */
139 sc->lastx = bus_space_read_4(sc->sc_iot, sc->sc_ioh, QMS_MOUSEX);
140 sc->lasty = bus_space_read_4(sc->sc_iot, sc->sc_ioh, QMS_MOUSEY);
141 b = bus_space_read_1(sc->sc_iot, sc->sc_butioh, QMS_BUTTONS) & 0x70;
142
143 /* patch up the buttons */
144 b >>= 4;
145 sc->lastb = ~( ((b & 1)<<2) | (b & 2) | ((b & 4)>>2));
146
147 callout_reset(&sc->sc_callout, hz / 100, qms_intr, sc);
148 return 0;
149 }
150
151
152 static void
qms_disable(void * cookie)153 qms_disable(void *cookie)
154 {
155 struct qms_softc *sc = cookie;
156
157 callout_stop(&sc->sc_callout);
158 }
159
160
161 static int
qms_ioctl(void * cookie,u_long cmd,void * data,int flag,struct lwp * l)162 qms_ioctl(void *cookie, u_long cmd, void *data, int flag, struct lwp *l)
163 {
164
165 switch (cmd) {
166 case WSMOUSEIO_GTYPE:
167 *(int *)data = WSMOUSE_TYPE_ARCHIMEDES;
168 return 0;
169 }
170
171 return EPASSTHROUGH;
172 }
173
174
175 static void
qms_intr(void * arg)176 qms_intr(void *arg)
177 {
178 struct qms_softc *sc = arg;
179 int b;
180 uint16_t x, y;
181 int16_t dx, dy;
182
183 x = bus_space_read_4(sc->sc_iot, sc->sc_ioh, QMS_MOUSEX);
184 y = bus_space_read_4(sc->sc_iot, sc->sc_ioh, QMS_MOUSEY);
185 b = bus_space_read_1(sc->sc_iot, sc->sc_butioh, QMS_BUTTONS) & 0x70;
186
187 /* patch up the buttons */
188 b >>= 4;
189 b = ~( ((b & 1)<<2) | (b & 2) | ((b & 4)>>2));
190
191 if ((x != sc->lastx) || (y != sc->lasty) || (b != sc->lastb)) {
192 /* This assumes that int16_t is two's complement. */
193 dx = x - sc->lastx;
194 dy = y - sc->lasty;
195 wsmouse_input(sc->sc_wsmousedev,
196 b,
197 dx, dy, 0, 0,
198 WSMOUSE_INPUT_DELTA);
199
200 /* save old values */
201 sc->lastx = x;
202 sc->lasty = y;
203 sc->lastb = b;
204 }
205 callout_reset(&sc->sc_callout, hz / 100, qms_intr, sc);
206 }
207
208
209 /* end of qms.c */
210