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 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 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 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 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 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 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 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 * 238 biconsdevtty(dev_t dev) 239 { 240 struct tty *tp = &biconsdev_tty[0]; 241 242 return (tp); 243 } 244 245 int 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
Indexes created Sat Sep 20 22:09:52 GMT 2025