arcbios_tty.c revision 1.3.2.2
1 1.3.2.2 nathanw /* $NetBSD: arcbios_tty.c,v 1.3.2.2 2002/04/01 07:45:08 nathanw Exp $ */ 2 1.3.2.2 nathanw 3 1.3.2.2 nathanw /* 4 1.3.2.2 nathanw * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 5 1.3.2.2 nathanw * All rights reserved. 6 1.3.2.2 nathanw * 7 1.3.2.2 nathanw * Author: Chris G. Demetriou 8 1.3.2.2 nathanw * 9 1.3.2.2 nathanw * Permission to use, copy, modify and distribute this software and 10 1.3.2.2 nathanw * its documentation is hereby granted, provided that both the copyright 11 1.3.2.2 nathanw * notice and this permission notice appear in all copies of the 12 1.3.2.2 nathanw * software, derivative works or modified versions, and any portions 13 1.3.2.2 nathanw * thereof, and that both notices appear in supporting documentation. 14 1.3.2.2 nathanw * 15 1.3.2.2 nathanw * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 1.3.2.2 nathanw * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 1.3.2.2 nathanw * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 1.3.2.2 nathanw * 19 1.3.2.2 nathanw * Carnegie Mellon requests users of this software to return to 20 1.3.2.2 nathanw * 21 1.3.2.2 nathanw * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 22 1.3.2.2 nathanw * School of Computer Science 23 1.3.2.2 nathanw * Carnegie Mellon University 24 1.3.2.2 nathanw * Pittsburgh PA 15213-3890 25 1.3.2.2 nathanw * 26 1.3.2.2 nathanw * any improvements or extensions that they make and grant Carnegie the 27 1.3.2.2 nathanw * rights to redistribute these changes. 28 1.3.2.2 nathanw */ 29 1.3.2.2 nathanw 30 1.3.2.2 nathanw #include <sys/cdefs.h> 31 1.3.2.2 nathanw __KERNEL_RCSID(0, "$NetBSD: arcbios_tty.c,v 1.3.2.2 2002/04/01 07:45:08 nathanw Exp $"); 32 1.3.2.2 nathanw 33 1.3.2.2 nathanw #include <sys/param.h> 34 1.3.2.2 nathanw #include <sys/user.h> 35 1.3.2.2 nathanw #include <sys/uio.h> 36 1.3.2.2 nathanw #include <sys/systm.h> 37 1.3.2.2 nathanw #include <sys/callout.h> 38 1.3.2.2 nathanw #include <sys/kernel.h> 39 1.3.2.2 nathanw #include <sys/conf.h> 40 1.3.2.2 nathanw #include <sys/proc.h> 41 1.3.2.2 nathanw #include <sys/tty.h> 42 1.3.2.2 nathanw #include <sys/termios.h> 43 1.3.2.2 nathanw 44 1.3.2.2 nathanw #include <dev/cons.h> 45 1.3.2.2 nathanw 46 1.3.2.2 nathanw #include <dev/arcbios/arcbios.h> 47 1.3.2.2 nathanw #include <dev/arcbios/arcbiosvar.h> 48 1.3.2.2 nathanw 49 1.3.2.2 nathanw struct callout arcbios_tty_ch = CALLOUT_INITIALIZER; 50 1.3.2.2 nathanw 51 1.3.2.2 nathanw static struct tty *arcbios_tty[1]; 52 1.3.2.2 nathanw 53 1.3.2.2 nathanw void arcbios_tty_start(struct tty *); 54 1.3.2.2 nathanw void arcbios_tty_poll(void *); 55 1.3.2.2 nathanw int arcbios_tty_param(struct tty *, struct termios *); 56 1.3.2.2 nathanw 57 1.3.2.2 nathanw cdev_decl(arcbios_tty); 58 1.3.2.2 nathanw 59 1.3.2.2 nathanw int 60 1.3.2.2 nathanw arcbios_ttyopen(dev_t dev, int flag, int mode, struct proc *p) 61 1.3.2.2 nathanw { 62 1.3.2.2 nathanw int unit = minor(dev); 63 1.3.2.2 nathanw struct tty *tp; 64 1.3.2.2 nathanw int s, error = 0, setuptimeout = 0; 65 1.3.2.2 nathanw 66 1.3.2.2 nathanw if (unit != 0) 67 1.3.2.2 nathanw return (ENODEV); 68 1.3.2.2 nathanw 69 1.3.2.2 nathanw s = spltty(); 70 1.3.2.2 nathanw 71 1.3.2.2 nathanw if (arcbios_tty[unit] == NULL) { 72 1.3.2.2 nathanw tp = arcbios_tty[unit] = ttymalloc(); 73 1.3.2.2 nathanw tty_attach(tp); 74 1.3.2.2 nathanw } else 75 1.3.2.2 nathanw tp = arcbios_tty[unit]; 76 1.3.2.2 nathanw 77 1.3.2.2 nathanw tp->t_oproc = arcbios_tty_start; 78 1.3.2.2 nathanw tp->t_param = arcbios_tty_param; 79 1.3.2.2 nathanw tp->t_dev = dev; 80 1.3.2.2 nathanw if ((tp->t_state & TS_ISOPEN) == 0) { 81 1.3.2.2 nathanw tp->t_state |= TS_CARR_ON; 82 1.3.2.2 nathanw ttychars(tp); 83 1.3.2.2 nathanw tp->t_iflag = TTYDEF_IFLAG; 84 1.3.2.2 nathanw tp->t_oflag = TTYDEF_OFLAG; 85 1.3.2.2 nathanw tp->t_cflag = TTYDEF_CFLAG | CLOCAL; 86 1.3.2.2 nathanw tp->t_lflag = TTYDEF_LFLAG; 87 1.3.2.2 nathanw tp->t_ispeed = tp->t_ospeed = 9600; 88 1.3.2.2 nathanw ttsetwater(tp); 89 1.3.2.2 nathanw 90 1.3.2.2 nathanw setuptimeout = 1; 91 1.3.2.2 nathanw } else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) { 92 1.3.2.2 nathanw splx(s); 93 1.3.2.2 nathanw return (EBUSY); 94 1.3.2.2 nathanw } 95 1.3.2.2 nathanw 96 1.3.2.2 nathanw splx(s); 97 1.3.2.2 nathanw 98 1.3.2.2 nathanw error = (*tp->t_linesw->l_open)(dev, tp); 99 1.3.2.2 nathanw if (error == 0 && setuptimeout) 100 1.3.2.2 nathanw callout_reset(&arcbios_tty_ch, 1, arcbios_tty_poll, tp); 101 1.3.2.2 nathanw 102 1.3.2.2 nathanw return (error); 103 1.3.2.2 nathanw } 104 1.3.2.2 nathanw 105 1.3.2.2 nathanw int 106 1.3.2.2 nathanw arcbios_ttyclose(dev_t dev, int flag, int mode, struct proc *p) 107 1.3.2.2 nathanw { 108 1.3.2.2 nathanw int unit = minor(dev); 109 1.3.2.2 nathanw struct tty *tp = arcbios_tty[unit]; 110 1.3.2.2 nathanw 111 1.3.2.2 nathanw callout_stop(&arcbios_tty_ch); 112 1.3.2.2 nathanw (*tp->t_linesw->l_close)(tp, flag); 113 1.3.2.2 nathanw ttyclose(tp); 114 1.3.2.2 nathanw return (0); 115 1.3.2.2 nathanw } 116 1.3.2.2 nathanw 117 1.3.2.2 nathanw int 118 1.3.2.2 nathanw arcbios_ttyread(dev_t dev, struct uio *uio, int flag) 119 1.3.2.2 nathanw { 120 1.3.2.2 nathanw struct tty *tp = arcbios_tty[minor(dev)]; 121 1.3.2.2 nathanw 122 1.3.2.2 nathanw return ((*tp->t_linesw->l_read)(tp, uio, flag)); 123 1.3.2.2 nathanw } 124 1.3.2.2 nathanw 125 1.3.2.2 nathanw int 126 1.3.2.2 nathanw arcbios_ttywrite(dev_t dev, struct uio *uio, int flag) 127 1.3.2.2 nathanw { 128 1.3.2.2 nathanw struct tty *tp = arcbios_tty[minor(dev)]; 129 1.3.2.2 nathanw 130 1.3.2.2 nathanw return ((*tp->t_linesw->l_write)(tp, uio, flag)); 131 1.3.2.2 nathanw } 132 1.3.2.2 nathanw 133 1.3.2.2 nathanw int 134 1.3.2.2 nathanw arcbios_ttypoll(dev_t dev, int events, struct proc *p) 135 1.3.2.2 nathanw { 136 1.3.2.2 nathanw struct tty *tp = arcbios_tty[minor(dev)]; 137 1.3.2.2 nathanw 138 1.3.2.2 nathanw return ((*tp->t_linesw->l_poll)(tp, events, p)); 139 1.3.2.2 nathanw } 140 1.3.2.2 nathanw 141 1.3.2.2 nathanw int 142 1.3.2.2 nathanw arcbios_ttyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 143 1.3.2.2 nathanw { 144 1.3.2.2 nathanw int unit = minor(dev); 145 1.3.2.2 nathanw struct tty *tp = arcbios_tty[unit]; 146 1.3.2.2 nathanw int error; 147 1.3.2.2 nathanw 148 1.3.2.2 nathanw error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 149 1.3.2.2 nathanw if (error != EPASSTHROUGH) 150 1.3.2.2 nathanw return (error); 151 1.3.2.2 nathanw return (ttioctl(tp, cmd, data, flag, p)); 152 1.3.2.2 nathanw } 153 1.3.2.2 nathanw 154 1.3.2.2 nathanw int 155 1.3.2.2 nathanw arcbios_tty_param(struct tty *tp, struct termios *t) 156 1.3.2.2 nathanw { 157 1.3.2.2 nathanw 158 1.3.2.2 nathanw return (0); 159 1.3.2.2 nathanw } 160 1.3.2.2 nathanw 161 1.3.2.2 nathanw void 162 1.3.2.2 nathanw arcbios_tty_start(struct tty *tp) 163 1.3.2.2 nathanw { 164 1.3.2.2 nathanw uint32_t count; 165 1.3.2.2 nathanw int s; 166 1.3.2.2 nathanw 167 1.3.2.2 nathanw s = spltty(); 168 1.3.2.2 nathanw if (tp->t_state & (TS_TTSTOP | TS_BUSY)) 169 1.3.2.2 nathanw goto out; 170 1.3.2.2 nathanw if (tp->t_outq.c_cc <= tp->t_lowat) { 171 1.3.2.2 nathanw if (tp->t_state & TS_ASLEEP) { 172 1.3.2.2 nathanw tp->t_state &= ~TS_ASLEEP; 173 1.3.2.2 nathanw wakeup((caddr_t)&tp->t_outq); 174 1.3.2.2 nathanw } 175 1.3.2.2 nathanw selwakeup(&tp->t_wsel); 176 1.3.2.2 nathanw } 177 1.3.2.2 nathanw tp->t_state |= TS_BUSY; 178 1.3.2.2 nathanw while (tp->t_outq.c_cc != 0) { 179 1.3.2.2 nathanw (*ARCBIOS->Write)(ARCBIOS_STDOUT, tp->t_outq.c_cf, 180 1.3.2.2 nathanw ndqb(&tp->t_outq, 0), &count); 181 1.3.2.2 nathanw ndflush(&tp->t_outq, count); 182 1.3.2.2 nathanw } 183 1.3.2.2 nathanw tp->t_state &= ~TS_BUSY; 184 1.3.2.2 nathanw out: 185 1.3.2.2 nathanw splx(s); 186 1.3.2.2 nathanw } 187 1.3.2.2 nathanw 188 1.3.2.2 nathanw void 189 1.3.2.2 nathanw arcbios_ttystop(struct tty *tp, int flag) 190 1.3.2.2 nathanw { 191 1.3.2.2 nathanw int s; 192 1.3.2.2 nathanw 193 1.3.2.2 nathanw s = spltty(); 194 1.3.2.2 nathanw if (tp->t_state & TS_BUSY) 195 1.3.2.2 nathanw if ((tp->t_state & TS_TTSTOP) == 0) 196 1.3.2.2 nathanw tp->t_state |= TS_FLUSH; 197 1.3.2.2 nathanw splx(s); 198 1.3.2.2 nathanw } 199 1.3.2.2 nathanw 200 1.3.2.2 nathanw static int 201 1.3.2.2 nathanw arcbios_tty_getchar(int *cp) 202 1.3.2.2 nathanw { 203 1.3.2.2 nathanw char c; 204 1.3.2.2 nathanw int32_t q; 205 1.3.2.2 nathanw u_int32_t count; 206 1.3.2.2 nathanw 207 1.3.2.2 nathanw q = ARCBIOS->GetReadStatus(ARCBIOS_STDIN); 208 1.3.2.2 nathanw 209 1.3.2.2 nathanw if (q == 0) { 210 1.3.2.2 nathanw ARCBIOS->Read(ARCBIOS_STDIN, &c, 1, &count); 211 1.3.2.2 nathanw *cp = c; 212 1.3.2.2 nathanw 213 1.3.2.2 nathanw return 1; 214 1.3.2.2 nathanw } 215 1.3.2.2 nathanw 216 1.3.2.2 nathanw return 0; 217 1.3.2.2 nathanw } 218 1.3.2.2 nathanw 219 1.3.2.2 nathanw void 220 1.3.2.2 nathanw arcbios_tty_poll(void *v) 221 1.3.2.2 nathanw { 222 1.3.2.2 nathanw struct tty *tp = v; 223 1.3.2.2 nathanw int c, l_r; 224 1.3.2.2 nathanw 225 1.3.2.2 nathanw while (arcbios_tty_getchar(&c)) { 226 1.3.2.2 nathanw if (tp->t_state & TS_ISOPEN) 227 1.3.2.2 nathanw l_r = (*tp->t_linesw->l_rint)(c, tp); 228 1.3.2.2 nathanw } 229 1.3.2.2 nathanw callout_reset(&arcbios_tty_ch, 1, arcbios_tty_poll, tp); 230 1.3.2.2 nathanw } 231 1.3.2.2 nathanw 232 1.3.2.2 nathanw struct tty * 233 1.3.2.2 nathanw arcbios_ttytty(dev_t dev) 234 1.3.2.2 nathanw { 235 1.3.2.2 nathanw 236 1.3.2.2 nathanw if (minor(dev) != 0) 237 1.3.2.2 nathanw panic("arcbios_ttytty: bogus"); 238 1.3.2.2 nathanw 239 1.3.2.2 nathanw return (arcbios_tty[0]); 240 1.3.2.2 nathanw } 241
Indexes created Thu Oct 23 22:10:10 GMT 2025