kbd.c revision 1.3
1 /* $NetBSD: kbd.c,v 1.3 1995/06/09 20:00:14 leo Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Leo Weppelman 5 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/ioctl.h> 41 #include <sys/tty.h> 42 #include <sys/proc.h> 43 #include <sys/conf.h> 44 #include <sys/file.h> 45 #include <sys/kernel.h> 46 #include <sys/syslog.h> 47 #include <dev/cons.h> 48 #include <machine/cpu.h> 49 #include <machine/iomap.h> 50 #include <machine/mfp.h> 51 #include <machine/acia.h> 52 #include <machine/video.h> 53 #include <atari/dev/itevar.h> 54 #include <atari/dev/kbdreg.h> 55 #include <atari/dev/event_var.h> 56 #include <atari/dev/vuid_event.h> 57 58 /* 59 * The ringbuffer is the interface between the hard and soft interrupt handler. 60 * The hard interrupt runs straight from the MFP interrupt. 61 */ 62 #define KBD_RING_SIZE 256 /* Sz of input ring buffer, must be power of 2 */ 63 #define KBD_RING_MASK 255 /* Modulo mask for above */ 64 65 static u_char kbd_ring[KBD_RING_SIZE]; 66 static volatile u_int kbd_rbput = 0; /* 'put' index */ 67 static u_int kbd_rbget = 0; /* 'get' index */ 68 static u_char kbd_soft = 0; /* 1: Softint has been scheduled*/ 69 70 struct kbd_softc { 71 int k_event_mode; /* if 1, collect events, */ 72 /* else pass to ite */ 73 struct evvar k_events; /* event queue state */ 74 u_char k_soft_cs; /* control-reg. copy */ 75 u_char k_package[20]; /* XXX package being build */ 76 u_char k_pkg_size; /* Size of the package */ 77 u_char k_pkg_idx; 78 u_char *k_sendp; /* Output pointer */ 79 int k_send_cnt; /* Chars left for output */ 80 }; 81 82 static struct kbd_softc kbd_softc; 83 84 static void kbdsoft __P((void)); 85 static void kbdattach __P((struct device *, struct device *, void *)); 86 static int kbdmatch __P((struct device *, struct cfdata *, void *)); 87 static int kbd_wite_poll __P((u_char *, int)); 88 static void kbd_write __P((u_char *, int)); 89 static void kbd_pkg_start __P((struct kbd_softc *, u_char)); 90 91 struct cfdriver kbdcd = { 92 NULL, "kbd", (cfmatch_t)kbdmatch, kbdattach, 93 DV_DULL, sizeof(struct device), NULL, 0 }; 94 95 96 /*ARGSUSED*/ 97 static int 98 kbdmatch(pdp, cfp, auxp) 99 struct device *pdp; 100 struct cfdata *cfp; 101 void *auxp; 102 { 103 if (!strcmp((char *)auxp, "kbd")) 104 return (1); 105 return (0); 106 } 107 108 /*ARGSUSED*/ 109 static void 110 kbdattach(pdp, dp, auxp) 111 struct device *pdp, *dp; 112 void *auxp; 113 { 114 int timeout; 115 u_char rst[] = { 0x80, 0x01 }; 116 117 /* 118 * Disable keyboard interrupts from MFP 119 */ 120 MFP->mf_ierb &= ~IB_AINT; 121 122 /* 123 * Reset ACIA and intialize to: 124 * divide by 16, 8 data, 1 stop, no parity, enable RX interrupts 125 */ 126 KBD->ac_cs = A_RESET; 127 delay(100); /* XXX: enough? */ 128 KBD->ac_cs = kbd_softc.k_soft_cs = KBD_INIT | A_RXINT; 129 130 /* 131 * Clear error conditions 132 */ 133 while (KBD->ac_cs & (A_IRQ|A_RXRDY)) 134 timeout = KBD->ac_da; 135 136 /* 137 * Now send the reset string, and read+ignore it's response 138 */ 139 if (!kbd_wite_poll(rst, 2)) 140 printf("kbd: error cannot reset keyboard\n"); 141 for (timeout = 1000; timeout > 0; timeout--) { 142 if (KBD->ac_cs & (A_IRQ|A_RXRDY)) { 143 timeout = KBD->ac_da; 144 timeout = 100; 145 } 146 delay(100); 147 } 148 149 printf("\n"); 150 } 151 152 /* definitions for atari keyboard encoding. */ 153 #define KEY_CODE(c) ((u_char)(c) & 0x7f) 154 #define KEY_UP(c) ((u_char)(c) & 0x80) 155 #define IS_KEY(c) ((u_char)(c) < 0xf6) 156 157 void 158 kbdenable() 159 { 160 int s, code; 161 u_char kbd_icmd[] = { 0x12, 0x15 }; 162 163 s = spltty(); 164 165 /* 166 * Clear error conditions... 167 */ 168 while (KBD->ac_cs & (A_IRQ|A_RXRDY)) 169 code = KBD->ac_da; 170 /* 171 * Enable interrupts from MFP 172 */ 173 MFP->mf_iprb &= ~IB_AINT; 174 MFP->mf_ierb |= IB_AINT; 175 MFP->mf_imrb |= IB_AINT; 176 177 kbd_softc.k_event_mode = 0; 178 kbd_softc.k_events.ev_io = 0; 179 kbd_softc.k_pkg_size = 0; 180 splx(s); 181 182 /* 183 * Send init command: disable mice & joysticks 184 */ 185 kbd_write(kbd_icmd, sizeof(kbd_icmd)); 186 } 187 188 int kbdopen(dev_t dev, int flags, int mode, struct proc *p) 189 { 190 int s, error; 191 192 if (kbd_softc.k_events.ev_io) 193 return EBUSY; 194 195 kbd_softc.k_events.ev_io = p; 196 ev_init(&kbd_softc.k_events); 197 return (0); 198 } 199 200 int 201 kbdclose(dev_t dev, int flags, int mode, struct proc *p) 202 { 203 /* Turn off event mode, dump the queue */ 204 kbd_softc.k_event_mode = 0; 205 ev_fini(&kbd_softc.k_events); 206 kbd_softc.k_events.ev_io = NULL; 207 return (0); 208 } 209 210 int 211 kbdread(dev_t dev, struct uio *uio, int flags) 212 { 213 return ev_read(&kbd_softc.k_events, uio, flags); 214 } 215 216 int 217 kbdioctl(dev_t dev,u_long cmd,register caddr_t data,int flag,struct proc *p) 218 { 219 register struct kbd_softc *k = &kbd_softc; 220 221 switch (cmd) { 222 case KIOCTRANS: 223 if (*(int *)data == TR_UNTRANS_EVENT) 224 return 0; 225 break; 226 227 case KIOCGTRANS: 228 /* 229 * Get translation mode 230 */ 231 *(int *)data = TR_UNTRANS_EVENT; 232 return 0; 233 234 case KIOCSDIRECT: 235 k->k_event_mode = *(int *)data; 236 return 0; 237 238 case FIONBIO: /* we will remove this someday (soon???) */ 239 return 0; 240 241 case FIOASYNC: 242 k->k_events.ev_async = *(int *)data != 0; 243 return 0; 244 245 case TIOCSPGRP: 246 if (*(int *)data != k->k_events.ev_io->p_pgid) 247 return EPERM; 248 return 0; 249 250 default: 251 return ENOTTY; 252 } 253 254 /* 255 * We identified the ioctl, but we do not handle it. 256 */ 257 return EOPNOTSUPP; /* misuse, but what the heck */ 258 } 259 260 int 261 kbdselect (dev_t dev, int rw, struct proc *p) 262 { 263 return ev_select (&kbd_softc.k_events, rw, p); 264 } 265 266 /* 267 * Keyboard interrupt handler called straight from MFP at spl6. 268 */ 269 int 270 kbdintr(sr) 271 int sr; /* sr at time of interrupt */ 272 { 273 int code; 274 int got_char = 0; 275 276 /* 277 * There may be multiple keys available. Read them all. 278 */ 279 while (KBD->ac_cs & (A_RXRDY|A_OE|A_PE)) { 280 got_char = 1; 281 if (KBD->ac_cs & (A_OE|A_PE)) { 282 code = KBD->ac_da; /* Silently ignore errors */ 283 continue; 284 } 285 kbd_ring[kbd_rbput++ & KBD_RING_MASK] = KBD->ac_da; 286 } 287 288 /* 289 * If characters are waiting for transmit, send them. 290 */ 291 if ((kbd_softc.k_soft_cs & A_TXINT) && (KBD->ac_cs & A_TXRDY)) { 292 if (kbd_softc.k_sendp != NULL) 293 KBD->ac_da = *kbd_softc.k_sendp++; 294 if (--kbd_softc.k_send_cnt <= 0) { 295 /* 296 * The total package has been transmitted, 297 * wakeup anyone waiting for it. 298 */ 299 KBD->ac_cs = (kbd_softc.k_soft_cs &= ~A_TXINT); 300 kbd_softc.k_sendp = NULL; 301 kbd_softc.k_send_cnt = 0; 302 wakeup((caddr_t)&kbd_softc.k_send_cnt); 303 } 304 } 305 306 /* 307 * Activate software-level to handle possible input. 308 */ 309 if (got_char) { 310 if (!BASEPRI(sr)) { 311 if (!kbd_soft++) 312 add_sicallback(kbdsoft, 0, 0); 313 } else { 314 spl1(); 315 kbdsoft(); 316 } 317 } 318 } 319 320 /* 321 * Keyboard soft interrupt handler 322 */ 323 void 324 kbdsoft() 325 { 326 int s; 327 u_char code; 328 struct kbd_softc *k = &kbd_softc; 329 struct firm_event *fe; 330 int put; 331 int n, get; 332 333 kbd_soft = 0; 334 get = kbd_rbget; 335 336 for (;;) { 337 n = kbd_rbput; 338 if (get == n) /* We're done */ 339 break; 340 n -= get; 341 if (n > KBD_RING_SIZE) { /* Ring buffer overflow */ 342 get += n - KBD_RING_SIZE; 343 n = KBD_RING_SIZE; 344 } 345 while (--n >= 0) { 346 code = kbd_ring[get++ & KBD_RING_MASK]; 347 348 /* 349 * If collecting a package, stuff it in and 350 * continue. 351 */ 352 if (k->k_pkg_size && (k->k_pkg_idx < k->k_pkg_size)) { 353 k->k_package[k->k_pkg_idx++] = code; 354 if (k->k_pkg_idx == k->k_pkg_size) { 355 k->k_pkg_size = 0; 356 /* 357 * Package is complete, we can now 358 * send it to (the not yet present) 359 * mouse driver... 360 */ 361 /* mouse_soft(k->k_package,k->k_pkg_size);*/ 362 } 363 continue; 364 } 365 /* 366 * If this is a package header, init pkg. handling. 367 */ 368 if (!IS_KEY(code)) { 369 kbd_pkg_start(k, code); 370 continue; 371 } 372 /* 373 * if not in event mode, deliver straight to ite to 374 * process key stroke 375 */ 376 if (!k->k_event_mode) { 377 /* Gets to spltty() by itself */ 378 ite_filter(code, ITEFILT_TTY); 379 continue; 380 } 381 382 /* 383 * Keyboard is generating events. Turn this keystroke 384 * into an event and put it in the queue. If the queue 385 * is full, the keystroke is lost (sorry!). 386 */ 387 s = spltty(); 388 put = k->k_events.ev_put; 389 fe = &k->k_events.ev_q[put]; 390 put = (put + 1) % EV_QSIZE; 391 if (put == k->k_events.ev_get) { 392 log(LOG_WARNING, 393 "keyboard event queue overflow\n"); 394 splx(s); 395 continue; 396 } 397 fe->id = KEY_CODE(code); 398 fe->value = KEY_UP(code) ? VKEY_UP : VKEY_DOWN; 399 fe->time = time; 400 k->k_events.ev_put = put; 401 EV_WAKEUP(&k->k_events); 402 splx(s); 403 } 404 kbd_rbget = get; 405 } 406 } 407 408 static char sound[] = { 409 0xA8,0x01,0xA9,0x01,0xAA,0x01,0x00, 410 0xF8,0x10,0x10,0x10,0x00,0x20,0x03 411 }; 412 413 int 414 kbdbell() 415 { 416 register int i, sps; 417 418 sps = spltty(); 419 for (i = 0; i < sizeof(sound); i++) { 420 SOUND->sd_selr = i; 421 SOUND->sd_wdat = sound[i]; 422 } 423 splx(sps); 424 } 425 426 int 427 kbdgetcn() 428 { 429 u_char code; 430 int s = spltty(); 431 432 MFP->mf_imrb &= ~IB_AINT; 433 for (;;) { 434 while (!(KBD->ac_cs & (A_IRQ|A_RXRDY))) 435 ; /* Wait for key */ 436 if (KBD->ac_cs & (A_OE|A_PE)) { 437 code = KBD->ac_da; /* Silently ignore errors */ 438 continue; 439 } 440 break; 441 } 442 443 MFP->mf_iprb &= ~IB_AINT; 444 MFP->mf_imrb |= IB_AINT; 445 446 code = KBD->ac_da; 447 splx (s); 448 return code; 449 } 450 451 /* 452 * Write a command to the keyboard in 'polled' mode. 453 */ 454 static int 455 kbd_wite_poll(cmd, len) 456 u_char *cmd; 457 int len; 458 { 459 int timeout; 460 461 while (len-- > 0) { 462 KBD->ac_da = *cmd++; 463 for (timeout = 100; !(KBD->ac_cs & A_TXRDY); timeout--) 464 delay(10); 465 if (!(KBD->ac_cs & A_TXRDY)) 466 return (0); 467 } 468 return (1); 469 } 470 471 /* 472 * Write a command to the keyboard. Return when command is send. 473 */ 474 static void 475 kbd_write(cmd, len) 476 u_char *cmd; 477 int len; 478 { 479 struct kbd_softc *k = &kbd_softc; 480 int sps; 481 482 /* 483 * Get to splhigh, 'real' interrupts arrive at spl6! 484 */ 485 sps = splhigh(); 486 487 /* 488 * Make sure any privious write has ended... 489 */ 490 while (k->k_sendp != NULL) 491 tsleep((caddr_t)&k->k_sendp, TTOPRI, "kbd_write1", 0); 492 493 /* 494 * If the KBD-acia is not currently busy, send the first 495 * character now. 496 */ 497 KBD->ac_cs = (k->k_soft_cs |= A_TXINT); 498 if (KBD->ac_cs & A_TXRDY) { 499 KBD->ac_da = *cmd++; 500 len--; 501 } 502 503 /* 504 * If we're not yet done, wait until all characters are send. 505 */ 506 if (len > 0) { 507 k->k_sendp = cmd; 508 k->k_send_cnt = len; 509 tsleep((caddr_t)&k->k_send_cnt, TTOPRI, "kbd_write2", 0); 510 } 511 splx(sps); 512 513 /* 514 * Wakeup all procs waiting for us. 515 */ 516 wakeup((caddr_t)&k->k_sendp); 517 } 518 519 /* 520 * Setup softc-fields to assemble a keyboard package. 521 */ 522 static void 523 kbd_pkg_start(kp, msg_start) 524 struct kbd_softc *kp; 525 u_char msg_start; 526 { 527 kp->k_pkg_idx = 1; 528 kp->k_package[0] = msg_start; 529 switch (msg_start) { 530 case 0xf6: 531 kp->k_pkg_size = 8; 532 break; 533 case 0xf7: 534 kp->k_pkg_size = 6; 535 break; 536 case 0xf8: 537 case 0xf9: 538 case 0xfa: 539 case 0xfb: 540 kp->k_pkg_size = 3; 541 break; 542 case 0xfc: 543 kp->k_pkg_size = 7; 544 break; 545 case 0xfe: 546 case 0xff: 547 kp->k_pkg_size = 2; 548 break; 549 default: 550 printf("kbd: Unknown packet 0x%x\n", msg_start); 551 break; 552 } 553 } 554
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