1 /* $NetBSD: biconsdev.c,v 1.22 2014/07/25 08:10:37 dholland 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 1.22 2014/07/25 08:10:37 dholland 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 .d_open = biconsdevopen, 100 .d_close = biconsdevclose, 101 .d_read = biconsdevread, 102 .d_write = biconsdevwrite, 103 .d_ioctl = biconsdevioctl, 104 .d_stop = nostop, 105 .d_tty = biconsdevtty, 106 .d_poll = biconsdevpoll, 107 .d_mmap = nommap, 108 .d_kqfilter = ttykqfilter, 109 .d_discard = nodiscard, 110 .d_flag = D_TTY 111 }; 112 113 void 114 biconsdevattach(int n) 115 { 116 struct tty *tp = &biconsdev_tty[0]; 117 int maj; 118 119 /* locate the major number */ 120 maj = cdevsw_lookup_major(&biconsdev_cdevsw); 121 122 /* Set up the tty queues now... */ 123 clalloc(&tp->t_rawq, 1024, 1); 124 clalloc(&tp->t_canq, 1024, 1); 125 /* output queue doesn't need quoting */ 126 clalloc(&tp->t_outq, 1024, 0); 127 /* Set default line discipline. */ 128 tp->t_linesw = ttyldisc_default(); 129 130 131 tp->t_dev = makedev(maj, 0); 132 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 133 tp->t_param = (int (*)(struct tty *, struct termios *))nullop; 134 tp->t_winsize.ws_row = bicons_height; 135 tp->t_winsize.ws_col = bicons_width; 136 tp->t_winsize.ws_xpixel = bicons_xpixel; 137 tp->t_winsize.ws_ypixel = bicons_ypixel; 138 tp->t_oproc = biconsdev_output; 139 } 140 141 142 static void 143 biconsdev_output(struct tty *tp) 144 { 145 int s, n; 146 char buf[OBUFSIZ]; 147 148 s = spltty(); 149 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) { 150 splx(s); 151 return; 152 } 153 tp->t_state |= TS_BUSY; 154 splx(s); 155 n = q_to_b(&tp->t_outq, buf, sizeof(buf)); 156 bicons_putn(buf, n); 157 158 s = spltty(); 159 tp->t_state &= ~TS_BUSY; 160 /* Come back if there's more to do */ 161 if (ttypull(tp)) { 162 tp->t_state |= TS_TIMEOUT; 163 callout_schedule(&tp->t_rstrt_ch, 1); 164 } 165 splx(s); 166 } 167 168 169 int 170 biconsdevopen(dev_t dev, int flag, int mode, struct lwp *l) 171 { 172 struct tty *tp = &biconsdev_tty[0]; 173 int status; 174 175 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 176 return (EBUSY); 177 178 if ((tp->t_state & TS_ISOPEN) == 0) { 179 /* 180 * Leave baud rate alone! 181 */ 182 ttychars(tp); 183 tp->t_iflag = TTYDEF_IFLAG; 184 tp->t_oflag = TTYDEF_OFLAG; 185 tp->t_lflag = TTYDEF_LFLAG; 186 tp->t_cflag = TTYDEF_CFLAG; 187 tp->t_state = TS_ISOPEN | TS_CARR_ON; 188 (void)(*tp->t_param)(tp, &tp->t_termios); 189 ttsetwater(tp); 190 } 191 192 status = (*tp->t_linesw->l_open)(dev, tp); 193 return status; 194 } 195 196 197 int 198 biconsdevclose(dev_t dev, int flag, int mode, struct lwp *l) 199 { 200 struct tty *tp = &biconsdev_tty[0]; 201 202 (*tp->t_linesw->l_close)(tp, flag); 203 ttyclose(tp); 204 205 return (0); 206 } 207 208 209 int 210 biconsdevread(dev_t dev, struct uio *uio, int flag) 211 { 212 struct tty *tp = &biconsdev_tty[0]; 213 214 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 215 } 216 217 218 int 219 biconsdevwrite(dev_t dev, struct uio *uio, int flag) 220 { 221 struct tty *tp = &biconsdev_tty[0]; 222 223 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 224 } 225 226 227 int 228 biconsdevpoll(dev_t dev, int events, struct lwp *l) 229 { 230 struct tty *tp = &biconsdev_tty[0]; 231 232 return ((*tp->t_linesw->l_poll)(tp, events, l)); 233 } 234 235 236 struct tty * 237 biconsdevtty(dev_t dev) 238 { 239 struct tty *tp = &biconsdev_tty[0]; 240 241 return (tp); 242 } 243 244 int 245 biconsdevioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 246 { 247 struct tty *tp = &biconsdev_tty[0]; 248 int error; 249 250 if ((error = tp->t_linesw->l_ioctl(tp, cmd, data, flag, l)) != 251 EPASSTHROUGH) 252 return (error); 253 return (ttioctl(tp, cmd, data, flag, l)); 254 } 255