1/*	$NetBSD: biconsdev.c,v 1.19 2007/10/18 18:55:00 joerg 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 1.19 2007/10/18 18:55:00 joerg 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
86struct tty biconsdev_tty[NBICONSDEV];
87void	biconsdevattach(int);
88static	void biconsdev_output(struct tty *);
89
90dev_type_open(biconsdevopen);
91dev_type_close(biconsdevclose);
92dev_type_read(biconsdevread);
93dev_type_write(biconsdevwrite);
94dev_type_ioctl(biconsdevioctl);
95dev_type_tty(biconsdevtty);
96dev_type_poll(biconsdevpoll);
97
98const struct cdevsw biconsdev_cdevsw = {
99	biconsdevopen, biconsdevclose, biconsdevread, biconsdevwrite,
100	biconsdevioctl, nostop, biconsdevtty, biconsdevpoll, nommap,
101	ttykqfilter, D_TTY
102};
103
104void
105biconsdevattach(int n)
106{
107	struct tty *tp = &biconsdev_tty[0];
108	int maj;
109
110	/* locate the major number */
111	maj = cdevsw_lookup_major(&biconsdev_cdevsw);
112
113	/* Set up the tty queues now... */
114	clalloc(&tp->t_rawq, 1024, 1);
115	clalloc(&tp->t_canq, 1024, 1);
116	/* output queue doesn't need quoting */
117	clalloc(&tp->t_outq, 1024, 0);
118	/* Set default line discipline. */
119	tp->t_linesw = ttyldisc_default();
120
121
122	tp->t_dev = makedev(maj, 0);
123	tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
124	tp->t_param = (int (*)(struct tty *, struct termios *))nullop;
125	tp->t_winsize.ws_row = bicons_height;
126	tp->t_winsize.ws_col = bicons_width;
127	tp->t_winsize.ws_xpixel = bicons_xpixel;
128	tp->t_winsize.ws_ypixel = bicons_ypixel;
129	tp->t_oproc = biconsdev_output;
130}
131
132
133static void
134biconsdev_output(struct tty *tp)
135{
136	int s, n;
137	char buf[OBUFSIZ];
138
139	s = spltty();
140	if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
141		splx(s);
142		return;
143	}
144	tp->t_state |= TS_BUSY;
145	splx(s);
146	n = q_to_b(&tp->t_outq, buf, sizeof(buf));
147	bicons_putn(buf, n);
148
149	s = spltty();
150	tp->t_state &= ~TS_BUSY;
151	/* Come back if there's more to do */
152	if (ttypull(tp)) {
153		tp->t_state |= TS_TIMEOUT;
154		callout_schedule(&tp->t_rstrt_ch, 1);
155	}
156	splx(s);
157}
158
159
160int
161biconsdevopen(dev_t dev, int flag, int mode, struct lwp *l)
162{
163	struct tty *tp = &biconsdev_tty[0];
164	int status;
165
166	if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
167		return (EBUSY);
168
169	if ((tp->t_state & TS_ISOPEN) == 0) {
170		/*
171		 * Leave baud rate alone!
172		 */
173		ttychars(tp);
174		tp->t_iflag = TTYDEF_IFLAG;
175		tp->t_oflag = TTYDEF_OFLAG;
176		tp->t_lflag = TTYDEF_LFLAG;
177		tp->t_cflag = TTYDEF_CFLAG;
178		tp->t_state = TS_ISOPEN | TS_CARR_ON;
179		(void)(*tp->t_param)(tp, &tp->t_termios);
180		ttsetwater(tp);
181	}
182
183	status = (*tp->t_linesw->l_open)(dev, tp);
184	return status;
185}
186
187
188int
189biconsdevclose(dev_t dev, int flag, int mode, struct lwp *l)
190{
191	struct tty *tp = &biconsdev_tty[0];
192
193	(*tp->t_linesw->l_close)(tp, flag);
194	ttyclose(tp);
195
196	return (0);
197}
198
199
200int
201biconsdevread(dev_t dev, struct uio *uio, int flag)
202{
203	struct tty *tp = &biconsdev_tty[0];
204
205	return ((*tp->t_linesw->l_read)(tp, uio, flag));
206}
207
208
209int
210biconsdevwrite(dev_t dev, struct uio *uio, int flag)
211{
212	struct tty *tp = &biconsdev_tty[0];
213
214	return ((*tp->t_linesw->l_write)(tp, uio, flag));
215}
216
217
218int
219biconsdevpoll(dev_t dev, int events, struct lwp *l)
220{
221	struct tty *tp = &biconsdev_tty[0];
222
223	return ((*tp->t_linesw->l_poll)(tp, events, l));
224}
225
226
227struct tty *
228biconsdevtty(dev_t dev)
229{
230	struct tty *tp = &biconsdev_tty[0];
231
232        return (tp);
233}
234
235int
236biconsdevioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
237{
238	struct tty *tp = &biconsdev_tty[0];
239	int error;
240
241	if ((error = tp->t_linesw->l_ioctl(tp, cmd, data, flag, l)) !=
242	    EPASSTHROUGH)
243		return (error);
244	return (ttioctl(tp, cmd, data, flag, l));
245}
246