1 /* $NetBSD: sunkbd.c,v 1.19 2003/08/07 16:31:27 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)kbd.c 8.2 (Berkeley) 10/30/93 41 */ 42 43 /* 44 * /dev/kbd lower layer for sun keyboard off a tty (line discipline). 45 * This driver uses kbdsun middle layer to hook up to /dev/kbd. 46 */ 47 48 /* 49 * Keyboard interface line discipline. 50 * 51 */ 52 53 #include <sys/cdefs.h> 54 __KERNEL_RCSID(0, "$NetBSD: sunkbd.c,v 1.19 2003/08/07 16:31:27 agc Exp $"); 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/conf.h> 59 #include <sys/device.h> 60 #include <sys/kernel.h> 61 #include <sys/malloc.h> 62 #include <sys/proc.h> 63 #include <sys/signal.h> 64 #include <sys/signalvar.h> 65 #include <sys/time.h> 66 #include <sys/select.h> 67 #include <sys/syslog.h> 68 #include <sys/fcntl.h> 69 #include <sys/tty.h> 70 71 #include <dev/cons.h> 72 #include <machine/vuid_event.h> 73 #include <machine/kbd.h> 74 #include <dev/sun/event_var.h> 75 #include <dev/sun/kbd_xlate.h> 76 #include <dev/sun/kbdvar.h> 77 #include <dev/sun/kbdsunvar.h> 78 #include <dev/sun/kbd_ms_ttyvar.h> 79 80 /**************************************************************** 81 * Interface to the lower layer (ttycc) 82 ****************************************************************/ 83 84 static int sunkbd_match(struct device *, struct cfdata *, void *); 85 static void sunkbd_attach(struct device *, struct device *, void *); 86 static void sunkbd_write_data(struct kbd_sun_softc *, int); 87 static int sunkbdiopen(struct device *, int mode); 88 89 #if NWSKBD > 0 90 void kbd_wskbd_attach(struct kbd_softc *k, int isconsole); 91 #endif 92 93 int sunkbdinput(int, struct tty *); 94 int sunkbdstart(struct tty *); 95 96 /* Default keyboard baud rate */ 97 int sunkbd_bps = KBD_DEFAULT_BPS; 98 99 CFATTACH_DECL(kbd_tty, sizeof(struct kbd_sun_softc), 100 sunkbd_match, sunkbd_attach, NULL, NULL); 101 102 struct linesw sunkbd_disc = 103 { "sunkbd", 7, ttylopen, ttylclose, ttyerrio, ttyerrio, ttynullioctl, 104 sunkbdinput, sunkbdstart, nullmodem, ttpoll }; /* 7- SUNKBDDISC */ 105 106 107 /* 108 * sunkbd_match: how is this tty channel configured? 109 */ 110 int 111 sunkbd_match(parent, cf, aux) 112 struct device *parent; 113 struct cfdata *cf; 114 void *aux; 115 { 116 struct kbd_ms_tty_attach_args *args = aux; 117 118 if (strcmp(args->kmta_name, "keyboard") == 0) 119 return (1); 120 121 return 0; 122 } 123 124 void 125 sunkbd_attach(parent, self, aux) 126 struct device *parent, *self; 127 void *aux; 128 { 129 struct kbd_sun_softc *k = (void *) self; 130 struct kbd_ms_tty_attach_args *args = aux; 131 struct tty *tp = args->kmta_tp; 132 struct cons_channel *cc; 133 134 /* Set up the proper line discipline. */ 135 ttyldisc_init(); 136 if (ttyldisc_add(&sunkbd_disc, -1) == -1) 137 panic("sunkbd_attach: sunkbd_disc"); 138 tp->t_linesw = &sunkbd_disc; 139 tp->t_oflag &= ~OPOST; 140 tp->t_dev = args->kmta_dev; 141 142 /* link the structures together. */ 143 k->k_priv = tp; 144 tp->t_sc = (void *)k; 145 146 /* provide our middle layer with a link to the lower layer (i.e. us) */ 147 k->k_deviopen = sunkbdiopen; 148 k->k_deviclose = NULL; 149 k->k_write_data = sunkbd_write_data; 150 151 /* provide upper layer with a link to our middle layer */ 152 k->k_kbd.k_ops = &kbd_ops_sun; 153 154 /* alloc console input channel */ 155 if ((cc = kbd_cc_alloc(&k->k_kbd)) == NULL) 156 return; 157 158 if (args->kmta_consdev) { 159 char magic[4]; 160 161 /* 162 * Hookup ourselves as the console input channel 163 */ 164 args->kmta_baud = sunkbd_bps; 165 args->kmta_cflag = CLOCAL|CS8; 166 cons_attach_input(cc, args->kmta_consdev); 167 168 /* Tell our parent what the console should be. */ 169 args->kmta_consdev = cn_tab; 170 k->k_kbd.k_isconsole = 1; 171 printf(" (console input)"); 172 173 /* Set magic to "L1-A" */ 174 magic[0] = KBD_L1; 175 magic[1] = KBD_A; 176 magic[2] = 0; 177 cn_set_magic(magic); 178 } else { 179 extern void kd_attach_input(struct cons_channel *); 180 181 kd_attach_input(cc); 182 } 183 184 185 printf("\n"); 186 187 #if NWSKBD > 0 188 kbd_wskbd_attach(&k->k_kbd, args->kmta_consdev != NULL); 189 #endif 190 191 /* Do this before any calls to kbd_rint(). */ 192 kbd_xlate_init(&k->k_kbd.k_state); 193 194 /* Magic sequence. */ 195 k->k_magic1 = KBD_L1; 196 k->k_magic2 = KBD_A; 197 } 198 199 /* 200 * Internal open routine. This really should be inside com.c 201 * But I'm putting it here until we have a generic internal open 202 * mechanism. 203 */ 204 int 205 sunkbdiopen(dev, flags) 206 struct device *dev; 207 int flags; 208 { 209 struct kbd_sun_softc *k = (void *) dev; 210 struct tty *tp = (struct tty *)k->k_priv; 211 struct proc *p = curproc ? curproc : &proc0; 212 struct termios t; 213 const struct cdevsw *cdev; 214 int error; 215 216 cdev = cdevsw_lookup(tp->t_dev); 217 if (cdev == NULL) 218 return (ENXIO); 219 220 /* Open the lower device */ 221 if ((error = (*cdev->d_open)(tp->t_dev, O_NONBLOCK|flags, 222 0/* ignored? */, p)) != 0) 223 return (error); 224 225 /* Now configure it for the console. */ 226 tp->t_ospeed = 0; 227 t.c_ispeed = sunkbd_bps; 228 t.c_ospeed = sunkbd_bps; 229 t.c_cflag = CLOCAL|CS8; 230 (*tp->t_param)(tp, &t); 231 232 return (0); 233 } 234 235 /* 236 * TTY interface to handle input. 237 */ 238 int 239 sunkbdinput(c, tp) 240 int c; 241 struct tty *tp; 242 { 243 struct kbd_sun_softc *k = (void *) tp->t_sc; 244 u_char *cc; 245 int error; 246 247 248 cc = tp->t_cc; 249 250 /* 251 * Handle exceptional conditions (break, parity, framing). 252 */ 253 if ((error = ((c & TTY_ERRORMASK))) != 0) { 254 /* 255 * After garbage, flush pending input, and 256 * send a reset to resync key translation. 257 */ 258 log(LOG_ERR, "%s: input error (0x%x)\n", 259 k->k_kbd.k_dev.dv_xname, c); 260 c &= TTY_CHARMASK; 261 if (!k->k_txflags & K_TXBUSY) { 262 ttyflush(tp, FREAD | FWRITE); 263 goto send_reset; 264 } 265 } 266 267 /* 268 * Check for input buffer overflow 269 */ 270 if (tp->t_rawq.c_cc + tp->t_canq.c_cc >= TTYHOG) { 271 log(LOG_ERR, "%s: input overrun\n", 272 k->k_kbd.k_dev.dv_xname); 273 goto send_reset; 274 } 275 276 /* Pass this up to the "middle" layer. */ 277 kbd_sun_input(k, c); 278 return (-1); 279 280 send_reset: 281 /* Send a reset to resync translation. */ 282 kbd_sun_output(k, KBD_CMD_RESET); 283 return (ttstart(tp)); 284 285 } 286 287 int 288 sunkbdstart(tp) 289 struct tty *tp; 290 { 291 struct kbd_sun_softc *k = (void *) tp->t_sc; 292 293 /* 294 * Transmit done. Try to send more, or 295 * clear busy and wakeup drain waiters. 296 */ 297 k->k_txflags &= ~K_TXBUSY; 298 kbd_sun_start_tx(k); 299 ttstart(tp); 300 return (0); 301 } 302 /* 303 * used by kbd_sun_start_tx(); 304 */ 305 void 306 sunkbd_write_data(k, c) 307 struct kbd_sun_softc *k; 308 int c; 309 { 310 struct tty *tp = (struct tty *)k->k_priv; 311 int s; 312 313 s = spltty(); 314 ttyoutput(c, tp); 315 ttstart(tp); 316 splx(s); 317 } 318