biconsdev.c revision 1.17
1 /* $NetBSD: biconsdev.c,v 1.17 2006/10/01 19:28:43 elad 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 1.17 2006/10/01 19:28:43 elad 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 struct tty biconsdev_tty[NBICONSDEV]; 87 void biconsdevattach(int); 88 static void biconsdev_output(struct tty *); 89 90 dev_type_open(biconsdevopen); 91 dev_type_close(biconsdevclose); 92 dev_type_read(biconsdevread); 93 dev_type_write(biconsdevwrite); 94 dev_type_ioctl(biconsdevioctl); 95 dev_type_tty(biconsdevtty); 96 dev_type_poll(biconsdevpoll); 97 98 const struct cdevsw biconsdev_cdevsw = { 99 biconsdevopen, biconsdevclose, biconsdevread, biconsdevwrite, 100 biconsdevioctl, nostop, biconsdevtty, biconsdevpoll, nommap, 101 ttykqfilter, D_TTY 102 }; 103 104 void 105 biconsdevattach(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 } 131 132 133 static void 134 biconsdev_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 (tp->t_outq.c_cc) { 153 tp->t_state |= TS_TIMEOUT; 154 callout_reset(&tp->t_rstrt_ch, 1, ttrstrt, tp); 155 } 156 if (tp->t_outq.c_cc <= tp->t_lowat) { 157 if (tp->t_state&TS_ASLEEP) { 158 tp->t_state &= ~TS_ASLEEP; 159 wakeup((caddr_t)&tp->t_outq); 160 } 161 selwakeup(&tp->t_wsel); 162 } 163 splx(s); 164 } 165 166 167 int 168 biconsdevopen(dev_t dev, int flag, int mode, struct lwp *l) 169 { 170 struct tty *tp = &biconsdev_tty[0]; 171 int status; 172 173 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 174 return (EBUSY); 175 176 if ((tp->t_state & TS_ISOPEN) == 0) { 177 /* 178 * Leave baud rate alone! 179 */ 180 ttychars(tp); 181 tp->t_iflag = TTYDEF_IFLAG; 182 tp->t_oflag = TTYDEF_OFLAG; 183 tp->t_lflag = TTYDEF_LFLAG; 184 tp->t_cflag = TTYDEF_CFLAG; 185 tp->t_state = TS_ISOPEN | TS_CARR_ON; 186 (void)(*tp->t_param)(tp, &tp->t_termios); 187 ttsetwater(tp); 188 } 189 190 status = (*tp->t_linesw->l_open)(dev, tp); 191 return status; 192 } 193 194 195 int 196 biconsdevclose(dev_t dev, int flag, int mode, struct lwp *l) 197 { 198 struct tty *tp = &biconsdev_tty[0]; 199 200 (*tp->t_linesw->l_close)(tp, flag); 201 ttyclose(tp); 202 203 return (0); 204 } 205 206 207 int 208 biconsdevread(dev_t dev, struct uio *uio, int flag) 209 { 210 struct tty *tp = &biconsdev_tty[0]; 211 212 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 213 } 214 215 216 int 217 biconsdevwrite(dev_t dev, struct uio *uio, int flag) 218 { 219 struct tty *tp = &biconsdev_tty[0]; 220 221 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 222 } 223 224 225 int 226 biconsdevpoll(dev_t dev, int events, struct lwp *l) 227 { 228 struct tty *tp = &biconsdev_tty[0]; 229 230 return ((*tp->t_linesw->l_poll)(tp, events, l)); 231 } 232 233 234 struct tty * 235 biconsdevtty(dev_t dev) 236 { 237 struct tty *tp = &biconsdev_tty[0]; 238 239 return (tp); 240 } 241 242 int 243 biconsdevioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 244 { 245 struct tty *tp = &biconsdev_tty[0]; 246 int error; 247 248 if ((error = tp->t_linesw->l_ioctl(tp, cmd, data, flag, l)) != 249 EPASSTHROUGH) 250 return (error); 251 return (ttioctl(tp, cmd, data, flag, l)); 252 } 253
Indexes created Mon Sep 22 10:09:38 GMT 2025