1 /* $NetBSD: biconsdev.c,v 1.23 2015/08/20 14:40:18 christos Exp $ */
2
3 /*-
4 * Copyright (c) 1999-2001
5 * Shin Takemura and PocketBSD Project. 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.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the PocketBSD project
18 * and its contributors.
19 * 4. Neither the name of the project nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 */
36 /*
37 * Copyright (c) 1995
38 * The Regents of the University of California. All rights reserved.
39 *
40 * This code is derived from software contributed to Berkeley by
41 * Ted Lemon.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. Neither the name of the University nor the names of its contributors
52 * may be used to endorse or promote products derived from this software
53 * without specific prior written permission.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
66 *
67 */
68
69 #include <sys/cdefs.h>
70 __KERNEL_RCSID(0, "$NetBSD: biconsdev.c,v 1.23 2015/08/20 14:40:18 christos Exp $");
71
72 #include "biconsdev.h"
73 #include <sys/param.h>
74 #include <sys/proc.h>
75 #include <sys/systm.h>
76 #include <sys/buf.h>
77 #include <sys/ioctl.h>
78 #include <sys/tty.h>
79 #include <sys/conf.h>
80 #include <sys/kauth.h>
81
82 #include <dev/cons.h>
83 #include <dev/hpc/bicons.h>
84 #include <dev/hpc/biconsvar.h>
85
86 #include "ioconf.h"
87
88 struct tty biconsdev_tty[NBICONSDEV];
89 static void biconsdev_output(struct tty *);
90
91 dev_type_open(biconsdevopen);
92 dev_type_close(biconsdevclose);
93 dev_type_read(biconsdevread);
94 dev_type_write(biconsdevwrite);
95 dev_type_ioctl(biconsdevioctl);
96 dev_type_tty(biconsdevtty);
97 dev_type_poll(biconsdevpoll);
98
99 const struct cdevsw biconsdev_cdevsw = {
100 .d_open = biconsdevopen,
101 .d_close = biconsdevclose,
102 .d_read = biconsdevread,
103 .d_write = biconsdevwrite,
104 .d_ioctl = biconsdevioctl,
105 .d_stop = nostop,
106 .d_tty = biconsdevtty,
107 .d_poll = biconsdevpoll,
108 .d_mmap = nommap,
109 .d_kqfilter = ttykqfilter,
110 .d_discard = nodiscard,
111 .d_flag = D_TTY
112 };
113
114 void
biconsdevattach(int n)115 biconsdevattach(int n)
116 {
117 struct tty *tp = &biconsdev_tty[0];
118 int maj;
119
120 /* locate the major number */
121 maj = cdevsw_lookup_major(&biconsdev_cdevsw);
122
123 /* Set up the tty queues now... */
124 clalloc(&tp->t_rawq, 1024, 1);
125 clalloc(&tp->t_canq, 1024, 1);
126 /* output queue doesn't need quoting */
127 clalloc(&tp->t_outq, 1024, 0);
128 /* Set default line discipline. */
129 tp->t_linesw = ttyldisc_default();
130
131
132 tp->t_dev = makedev(maj, 0);
133 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
134 tp->t_param = (int (*)(struct tty *, struct termios *))nullop;
135 tp->t_winsize.ws_row = bicons_height;
136 tp->t_winsize.ws_col = bicons_width;
137 tp->t_winsize.ws_xpixel = bicons_xpixel;
138 tp->t_winsize.ws_ypixel = bicons_ypixel;
139 tp->t_oproc = biconsdev_output;
140 }
141
142
143 static void
biconsdev_output(struct tty * tp)144 biconsdev_output(struct tty *tp)
145 {
146 int s, n;
147 char buf[OBUFSIZ];
148
149 s = spltty();
150 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
151 splx(s);
152 return;
153 }
154 tp->t_state |= TS_BUSY;
155 splx(s);
156 n = q_to_b(&tp->t_outq, buf, sizeof(buf));
157 bicons_putn(buf, n);
158
159 s = spltty();
160 tp->t_state &= ~TS_BUSY;
161 /* Come back if there's more to do */
162 if (ttypull(tp)) {
163 tp->t_state |= TS_TIMEOUT;
164 callout_schedule(&tp->t_rstrt_ch, 1);
165 }
166 splx(s);
167 }
168
169
170 int
biconsdevopen(dev_t dev,int flag,int mode,struct lwp * l)171 biconsdevopen(dev_t dev, int flag, int mode, struct lwp *l)
172 {
173 struct tty *tp = &biconsdev_tty[0];
174 int status;
175
176 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
177 return (EBUSY);
178
179 if ((tp->t_state & TS_ISOPEN) == 0) {
180 /*
181 * Leave baud rate alone!
182 */
183 ttychars(tp);
184 tp->t_iflag = TTYDEF_IFLAG;
185 tp->t_oflag = TTYDEF_OFLAG;
186 tp->t_lflag = TTYDEF_LFLAG;
187 tp->t_cflag = TTYDEF_CFLAG;
188 tp->t_state = TS_ISOPEN | TS_CARR_ON;
189 (void)(*tp->t_param)(tp, &tp->t_termios);
190 ttsetwater(tp);
191 }
192
193 status = (*tp->t_linesw->l_open)(dev, tp);
194 return status;
195 }
196
197
198 int
biconsdevclose(dev_t dev,int flag,int mode,struct lwp * l)199 biconsdevclose(dev_t dev, int flag, int mode, struct lwp *l)
200 {
201 struct tty *tp = &biconsdev_tty[0];
202
203 (*tp->t_linesw->l_close)(tp, flag);
204 ttyclose(tp);
205
206 return (0);
207 }
208
209
210 int
biconsdevread(dev_t dev,struct uio * uio,int flag)211 biconsdevread(dev_t dev, struct uio *uio, int flag)
212 {
213 struct tty *tp = &biconsdev_tty[0];
214
215 return ((*tp->t_linesw->l_read)(tp, uio, flag));
216 }
217
218
219 int
biconsdevwrite(dev_t dev,struct uio * uio,int flag)220 biconsdevwrite(dev_t dev, struct uio *uio, int flag)
221 {
222 struct tty *tp = &biconsdev_tty[0];
223
224 return ((*tp->t_linesw->l_write)(tp, uio, flag));
225 }
226
227
228 int
biconsdevpoll(dev_t dev,int events,struct lwp * l)229 biconsdevpoll(dev_t dev, int events, struct lwp *l)
230 {
231 struct tty *tp = &biconsdev_tty[0];
232
233 return ((*tp->t_linesw->l_poll)(tp, events, l));
234 }
235
236
237 struct tty *
biconsdevtty(dev_t dev)238 biconsdevtty(dev_t dev)
239 {
240 struct tty *tp = &biconsdev_tty[0];
241
242 return (tp);
243 }
244
245 int
biconsdevioctl(dev_t dev,u_long cmd,void * data,int flag,struct lwp * l)246 biconsdevioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
247 {
248 struct tty *tp = &biconsdev_tty[0];
249 int error;
250
251 if ((error = tp->t_linesw->l_ioctl(tp, cmd, data, flag, l)) !=
252 EPASSTHROUGH)
253 return (error);
254 return (ttioctl(tp, cmd, data, flag, l));
255 }
256