pckbc.c revision 1.8
1 /* $NetBSD: pckbc.c,v 1.8 2001/05/17 10:48:39 drochner Exp $ */ 2 3 /* 4 * Copyright (c) 1998 5 * Matthias Drochner. 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 for the NetBSD Project 18 * by Matthias Drochner. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/callout.h> 37 #include <sys/kernel.h> 38 #include <sys/proc.h> 39 #include <sys/device.h> 40 #include <sys/malloc.h> 41 #include <sys/errno.h> 42 #include <sys/queue.h> 43 #include <sys/lock.h> 44 45 #include <machine/bus.h> 46 47 #include <dev/ic/i8042reg.h> 48 #include <dev/ic/pckbcvar.h> 49 50 #include "rnd.h" 51 #include "locators.h" 52 53 #ifdef __HAVE_NWSCONS /* XXX: this port uses sys/dev/pckbc */ 54 #include "pckbd.h" 55 #else /* ie: only md drivers attach to pckbc */ 56 #define NPCKBD 0 57 #endif 58 #if (NPCKBD > 0) 59 #include <dev/pckbc/pckbdvar.h> 60 #endif 61 #if NRND > 0 62 #include <sys/rnd.h> 63 #endif 64 65 /* descriptor for one device command */ 66 struct pckbc_devcmd { 67 TAILQ_ENTRY(pckbc_devcmd) next; 68 int flags; 69 #define KBC_CMDFLAG_SYNC 1 /* give descriptor back to caller */ 70 #define KBC_CMDFLAG_SLOW 2 71 u_char cmd[4]; 72 int cmdlen, cmdidx, retries; 73 u_char response[4]; 74 int status, responselen, responseidx; 75 }; 76 77 /* data per slave device */ 78 struct pckbc_slotdata { 79 int polling; /* don't read data port in interrupt handler */ 80 TAILQ_HEAD(, pckbc_devcmd) cmdqueue; /* active commands */ 81 TAILQ_HEAD(, pckbc_devcmd) freequeue; /* free commands */ 82 #define NCMD 5 83 struct pckbc_devcmd cmds[NCMD]; 84 #if NRND > 0 85 rndsource_element_t rnd_source; 86 #endif 87 }; 88 89 #define CMD_IN_QUEUE(q) (TAILQ_FIRST(&(q)->cmdqueue) != NULL) 90 91 void pckbc_init_slotdata __P((struct pckbc_slotdata *)); 92 int pckbc_attach_slot __P((struct pckbc_softc *, pckbc_slot_t)); 93 int pckbc_submatch __P((struct device *, struct cfdata *, void *)); 94 int pckbcprint __P((void *, const char *)); 95 96 struct pckbc_internal pckbc_consdata; 97 int pckbc_console_attached; 98 99 static int pckbc_console; 100 static struct pckbc_slotdata pckbc_cons_slotdata; 101 102 static int pckbc_wait_output __P((bus_space_tag_t, bus_space_handle_t)); 103 104 static int pckbc_get8042cmd __P((struct pckbc_internal *)); 105 static int pckbc_put8042cmd __P((struct pckbc_internal *)); 106 static int pckbc_send_devcmd __P((struct pckbc_internal *, pckbc_slot_t, 107 u_char)); 108 static void pckbc_poll_cmd1 __P((struct pckbc_internal *, pckbc_slot_t, 109 struct pckbc_devcmd *)); 110 111 void pckbc_cleanqueue __P((struct pckbc_slotdata *)); 112 void pckbc_cleanup __P((void *)); 113 int pckbc_cmdresponse __P((struct pckbc_internal *, pckbc_slot_t, u_char)); 114 void pckbc_start __P((struct pckbc_internal *, pckbc_slot_t)); 115 116 const char *pckbc_slot_names[] = { "kbd", "aux" }; 117 118 #define KBC_DEVCMD_ACK 0xfa 119 #define KBC_DEVCMD_RESEND 0xfe 120 121 #define KBD_DELAY DELAY(8) 122 123 static inline int 124 pckbc_wait_output(iot, ioh_c) 125 bus_space_tag_t iot; 126 bus_space_handle_t ioh_c; 127 { 128 u_int i; 129 130 for (i = 100000; i; i--) 131 if (!(bus_space_read_1(iot, ioh_c, 0) & KBS_IBF)) { 132 KBD_DELAY; 133 return (1); 134 } 135 return (0); 136 } 137 138 int 139 pckbc_send_cmd(iot, ioh_c, val) 140 bus_space_tag_t iot; 141 bus_space_handle_t ioh_c; 142 u_char val; 143 { 144 if (!pckbc_wait_output(iot, ioh_c)) 145 return (0); 146 bus_space_write_1(iot, ioh_c, 0, val); 147 return (1); 148 } 149 150 int 151 pckbc_poll_data1(iot, ioh_d, ioh_c, slot, checkaux) 152 bus_space_tag_t iot; 153 bus_space_handle_t ioh_d, ioh_c; 154 pckbc_slot_t slot; 155 int checkaux; 156 { 157 int i; 158 u_char stat; 159 160 /* if 1 port read takes 1us (?), this polls for 100ms */ 161 for (i = 100000; i; i--) { 162 stat = bus_space_read_1(iot, ioh_c, 0); 163 if (stat & KBS_DIB) { 164 register u_char c; 165 166 KBD_DELAY; 167 c = bus_space_read_1(iot, ioh_d, 0); 168 if (checkaux && (stat & 0x20)) { /* aux data */ 169 if (slot != PCKBC_AUX_SLOT) { 170 #ifdef PCKBCDEBUG 171 printf("lost aux 0x%x\n", c); 172 #endif 173 continue; 174 } 175 } else { 176 if (slot == PCKBC_AUX_SLOT) { 177 #ifdef PCKBCDEBUG 178 printf("lost kbd 0x%x\n", c); 179 #endif 180 continue; 181 } 182 } 183 return (c); 184 } 185 } 186 return (-1); 187 } 188 189 /* 190 * Get the current command byte. 191 */ 192 static int 193 pckbc_get8042cmd(t) 194 struct pckbc_internal *t; 195 { 196 bus_space_tag_t iot = t->t_iot; 197 bus_space_handle_t ioh_d = t->t_ioh_d; 198 bus_space_handle_t ioh_c = t->t_ioh_c; 199 int data; 200 201 if (!pckbc_send_cmd(iot, ioh_c, K_RDCMDBYTE)) 202 return (0); 203 data = pckbc_poll_data1(iot, ioh_d, ioh_c, PCKBC_KBD_SLOT, 204 t->t_haveaux); 205 if (data == -1) 206 return (0); 207 t->t_cmdbyte = data; 208 return (1); 209 } 210 211 /* 212 * Pass command byte to keyboard controller (8042). 213 */ 214 static int 215 pckbc_put8042cmd(t) 216 struct pckbc_internal *t; 217 { 218 bus_space_tag_t iot = t->t_iot; 219 bus_space_handle_t ioh_d = t->t_ioh_d; 220 bus_space_handle_t ioh_c = t->t_ioh_c; 221 222 if (!pckbc_send_cmd(iot, ioh_c, K_LDCMDBYTE)) 223 return (0); 224 if (!pckbc_wait_output(iot, ioh_c)) 225 return (0); 226 bus_space_write_1(iot, ioh_d, 0, t->t_cmdbyte); 227 return (1); 228 } 229 230 static int 231 pckbc_send_devcmd(t, slot, val) 232 struct pckbc_internal *t; 233 pckbc_slot_t slot; 234 u_char val; 235 { 236 bus_space_tag_t iot = t->t_iot; 237 bus_space_handle_t ioh_d = t->t_ioh_d; 238 bus_space_handle_t ioh_c = t->t_ioh_c; 239 240 if (slot == PCKBC_AUX_SLOT) { 241 if (!pckbc_send_cmd(iot, ioh_c, KBC_AUXWRITE)) 242 return (0); 243 } 244 if (!pckbc_wait_output(iot, ioh_c)) 245 return (0); 246 bus_space_write_1(iot, ioh_d, 0, val); 247 return (1); 248 } 249 250 int 251 pckbc_is_console(iot, addr) 252 bus_space_tag_t iot; 253 bus_addr_t addr; 254 { 255 if (pckbc_console && !pckbc_console_attached && 256 pckbc_consdata.t_iot == iot && 257 pckbc_consdata.t_addr == addr) 258 return (1); 259 return (0); 260 } 261 262 int 263 pckbc_submatch(parent, cf, aux) 264 struct device *parent; 265 struct cfdata *cf; 266 void *aux; 267 { 268 struct pckbc_attach_args *pa = aux; 269 270 if (cf->cf_loc[PCKBCCF_SLOT] != PCKBCCF_SLOT_DEFAULT && 271 cf->cf_loc[PCKBCCF_SLOT] != pa->pa_slot) 272 return (0); 273 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 274 } 275 276 int 277 pckbc_attach_slot(sc, slot) 278 struct pckbc_softc *sc; 279 pckbc_slot_t slot; 280 { 281 struct pckbc_internal *t = sc->id; 282 struct pckbc_attach_args pa; 283 int found; 284 285 pa.pa_tag = t; 286 pa.pa_slot = slot; 287 found = (config_found_sm((struct device *)sc, &pa, 288 pckbcprint, pckbc_submatch) != NULL); 289 290 if (found && !t->t_slotdata[slot]) { 291 t->t_slotdata[slot] = malloc(sizeof(struct pckbc_slotdata), 292 M_DEVBUF, M_NOWAIT); 293 pckbc_init_slotdata(t->t_slotdata[slot]); 294 } 295 #if NRND > 0 296 if (found && (t->t_slotdata[slot] != NULL)) 297 rnd_attach_source(&t->t_slotdata[slot]->rnd_source, sc->subname[slot], 298 RND_TYPE_TTY, 0); 299 #endif 300 return (found); 301 } 302 303 void 304 pckbc_attach(sc) 305 struct pckbc_softc *sc; 306 { 307 struct pckbc_internal *t; 308 bus_space_tag_t iot; 309 bus_space_handle_t ioh_d, ioh_c; 310 int res; 311 u_char cmdbits = 0; 312 313 t = sc->id; 314 iot = t->t_iot; 315 ioh_d = t->t_ioh_d; 316 ioh_c = t->t_ioh_c; 317 318 /* flush */ 319 (void) pckbc_poll_data1(iot, ioh_d, ioh_c, PCKBC_KBD_SLOT, 0); 320 321 /* set initial cmd byte */ 322 if (!pckbc_put8042cmd(t)) { 323 printf("kbc: cmd word write error\n"); 324 return; 325 } 326 327 /* 328 * XXX Don't check the keyboard port. There are broken keyboard controllers 329 * which don't pass the test but work normally otherwise. 330 */ 331 #if 0 332 /* 333 * check kbd port ok 334 */ 335 if (!pckbc_send_cmd(iot, ioh_c, KBC_KBDTEST)) 336 return; 337 res = pckbc_poll_data1(iot, ioh_d, ioh_c, PCKBC_KBD_SLOT, 0); 338 339 /* 340 * Normally, we should get a "0" here. 341 * But there are keyboard controllers behaving differently. 342 */ 343 if (res == 0 || res == 0xfa || res == 0x01 || res == 0xab) { 344 #ifdef PCKBCDEBUG 345 if (res != 0) 346 printf("kbc: returned %x on kbd slot test\n", res); 347 #endif 348 if (pckbc_attach_slot(sc, PCKBC_KBD_SLOT)) 349 cmdbits |= KC8_KENABLE; 350 } else { 351 printf("kbc: kbd port test: %x\n", res); 352 return; 353 } 354 #else 355 if (pckbc_attach_slot(sc, PCKBC_KBD_SLOT)) 356 cmdbits |= KC8_KENABLE; 357 #endif /* 0 */ 358 359 /* 360 * Check aux port ok. 361 * Avoid KBC_AUXTEST because it hangs some older controllers 362 * (eg UMC880?). 363 */ 364 if (!pckbc_send_cmd(iot, ioh_c, KBC_AUXECHO)) { 365 printf("kbc: aux echo error 1\n"); 366 goto nomouse; 367 } 368 if (!pckbc_wait_output(iot, ioh_c)) { 369 printf("kbc: aux echo error 2\n"); 370 goto nomouse; 371 } 372 bus_space_write_1(iot, ioh_d, 0, 0x5a); /* a random value */ 373 res = pckbc_poll_data1(iot, ioh_d, ioh_c, PCKBC_AUX_SLOT, 1); 374 if (res != -1) { 375 /* 376 * In most cases, the 0x5a gets echoed. 377 * Some older controllers (Gateway 2000 circa 1993) 378 * return 0xfe here. 379 * We are satisfied if there is anything in the 380 * aux output buffer. 381 */ 382 t->t_haveaux = 1; 383 if (pckbc_attach_slot(sc, PCKBC_AUX_SLOT)) 384 cmdbits |= KC8_MENABLE; 385 } 386 #ifdef PCKBCDEBUG 387 else 388 printf("kbc: aux echo test failed\n"); 389 #endif 390 391 nomouse: 392 /* enable needed interrupts */ 393 t->t_cmdbyte |= cmdbits; 394 if (!pckbc_put8042cmd(t)) 395 printf("kbc: cmd word write error\n"); 396 } 397 398 int 399 pckbcprint(aux, pnp) 400 void *aux; 401 const char *pnp; 402 { 403 struct pckbc_attach_args *pa = aux; 404 405 if (!pnp) 406 printf(" (%s slot)", pckbc_slot_names[pa->pa_slot]); 407 return (QUIET); 408 } 409 410 void 411 pckbc_init_slotdata(q) 412 struct pckbc_slotdata *q; 413 { 414 int i; 415 TAILQ_INIT(&q->cmdqueue); 416 TAILQ_INIT(&q->freequeue); 417 418 for (i = 0; i < NCMD; i++) { 419 TAILQ_INSERT_TAIL(&q->freequeue, &(q->cmds[i]), next); 420 } 421 q->polling = 0; 422 } 423 424 void 425 pckbc_flush(self, slot) 426 pckbc_tag_t self; 427 pckbc_slot_t slot; 428 { 429 struct pckbc_internal *t = self; 430 431 (void) pckbc_poll_data1(t->t_iot, t->t_ioh_d, t->t_ioh_c, 432 slot, t->t_haveaux); 433 } 434 435 int 436 pckbc_poll_data(self, slot) 437 pckbc_tag_t self; 438 pckbc_slot_t slot; 439 { 440 struct pckbc_internal *t = self; 441 struct pckbc_slotdata *q = t->t_slotdata[slot]; 442 int c; 443 444 c = pckbc_poll_data1(t->t_iot, t->t_ioh_d, t->t_ioh_c, 445 slot, t->t_haveaux); 446 if (c != -1 && q && CMD_IN_QUEUE(q)) { 447 /* we jumped into a running command - try to 448 deliver the response */ 449 if (pckbc_cmdresponse(t, slot, c)) 450 return (-1); 451 } 452 return (c); 453 } 454 455 /* 456 * switch scancode translation on / off 457 * return nonzero on success 458 */ 459 int 460 pckbc_xt_translation(self, slot, on) 461 pckbc_tag_t self; 462 pckbc_slot_t slot; 463 int on; 464 { 465 struct pckbc_internal *t = self; 466 int ison; 467 468 if (slot != PCKBC_KBD_SLOT) { 469 /* translation only for kbd slot */ 470 if (on) 471 return (0); 472 else 473 return (1); 474 } 475 476 ison = t->t_cmdbyte & KC8_TRANS; 477 if ((on && ison) || (!on && !ison)) 478 return (1); 479 480 t->t_cmdbyte ^= KC8_TRANS; 481 if (!pckbc_put8042cmd(t)) 482 return (0); 483 484 /* read back to be sure */ 485 if (!pckbc_get8042cmd(t)) 486 return (0); 487 488 ison = t->t_cmdbyte & KC8_TRANS; 489 if ((on && ison) || (!on && !ison)) 490 return (1); 491 return (0); 492 } 493 494 static struct pckbc_portcmd { 495 u_char cmd_en, cmd_dis; 496 } pckbc_portcmd[2] = { 497 { 498 KBC_KBDENABLE, KBC_KBDDISABLE, 499 }, { 500 KBC_AUXENABLE, KBC_AUXDISABLE, 501 } 502 }; 503 504 void 505 pckbc_slot_enable(self, slot, on) 506 pckbc_tag_t self; 507 pckbc_slot_t slot; 508 int on; 509 { 510 struct pckbc_internal *t = (struct pckbc_internal *)self; 511 struct pckbc_portcmd *cmd; 512 513 cmd = &pckbc_portcmd[slot]; 514 515 if (!pckbc_send_cmd(t->t_iot, t->t_ioh_c, 516 on ? cmd->cmd_en : cmd->cmd_dis)) 517 printf("pckbc_slot_enable(%d) failed\n", on); 518 } 519 520 void 521 pckbc_set_poll(self, slot, on) 522 pckbc_tag_t self; 523 pckbc_slot_t slot; 524 int on; 525 { 526 struct pckbc_internal *t = (struct pckbc_internal *)self; 527 528 t->t_slotdata[slot]->polling = on; 529 530 if (!on) { 531 int s; 532 533 /* 534 * If disabling polling on a device that's been configured, 535 * make sure there are no bytes left in the FIFO, holding up 536 * the interrupt line. Otherwise we won't get any further 537 * interrupts. 538 */ 539 if (t->t_sc) { 540 s = spltty(); 541 pckbcintr(t->t_sc); 542 splx(s); 543 } 544 } 545 } 546 547 /* 548 * Pass command to device, poll for ACK and data. 549 * to be called at spltty() 550 */ 551 static void 552 pckbc_poll_cmd1(t, slot, cmd) 553 struct pckbc_internal *t; 554 pckbc_slot_t slot; 555 struct pckbc_devcmd *cmd; 556 { 557 bus_space_tag_t iot = t->t_iot; 558 bus_space_handle_t ioh_d = t->t_ioh_d; 559 bus_space_handle_t ioh_c = t->t_ioh_c; 560 int i, c = 0; 561 562 while (cmd->cmdidx < cmd->cmdlen) { 563 if (!pckbc_send_devcmd(t, slot, cmd->cmd[cmd->cmdidx])) { 564 printf("pckbc_cmd: send error\n"); 565 cmd->status = EIO; 566 return; 567 } 568 for (i = 10; i; i--) { /* 1s ??? */ 569 c = pckbc_poll_data1(iot, ioh_d, ioh_c, slot, 570 t->t_haveaux); 571 if (c != -1) 572 break; 573 } 574 575 if (c == KBC_DEVCMD_ACK) { 576 cmd->cmdidx++; 577 continue; 578 } 579 if (c == KBC_DEVCMD_RESEND) { 580 #ifdef PCKBCDEBUG 581 printf("pckbc_cmd: RESEND\n"); 582 #endif 583 if (cmd->retries++ < 5) 584 continue; 585 else { 586 #ifdef PCKBCDEBUG 587 printf("pckbc: cmd failed\n"); 588 #endif 589 cmd->status = EIO; 590 return; 591 } 592 } 593 if (c == -1) { 594 #ifdef PCKBCDEBUG 595 printf("pckbc_cmd: timeout\n"); 596 #endif 597 cmd->status = EIO; 598 return; 599 } 600 #ifdef PCKBCDEBUG 601 printf("pckbc_cmd: lost 0x%x\n", c); 602 #endif 603 } 604 605 while (cmd->responseidx < cmd->responselen) { 606 if (cmd->flags & KBC_CMDFLAG_SLOW) 607 i = 100; /* 10s ??? */ 608 else 609 i = 10; /* 1s ??? */ 610 while (i--) { 611 c = pckbc_poll_data1(iot, ioh_d, ioh_c, slot, 612 t->t_haveaux); 613 if (c != -1) 614 break; 615 } 616 if (c == -1) { 617 #ifdef PCKBCDEBUG 618 printf("pckbc_cmd: no data\n"); 619 #endif 620 cmd->status = ETIMEDOUT; 621 return; 622 } else 623 cmd->response[cmd->responseidx++] = c; 624 } 625 } 626 627 /* for use in autoconfiguration */ 628 int 629 pckbc_poll_cmd(self, slot, cmd, len, responselen, respbuf, slow) 630 pckbc_tag_t self; 631 pckbc_slot_t slot; 632 u_char *cmd; 633 int len, responselen; 634 u_char *respbuf; 635 int slow; 636 { 637 struct pckbc_internal *t = self; 638 struct pckbc_devcmd nc; 639 640 if ((len > 4) || (responselen > 4)) 641 return (EINVAL); 642 643 bzero(&nc, sizeof(nc)); 644 bcopy(cmd, nc.cmd, len); 645 nc.cmdlen = len; 646 nc.responselen = responselen; 647 nc.flags = (slow ? KBC_CMDFLAG_SLOW : 0); 648 649 pckbc_poll_cmd1(t, slot, &nc); 650 651 if (nc.status == 0 && respbuf) 652 bcopy(nc.response, respbuf, responselen); 653 654 return (nc.status); 655 } 656 657 /* 658 * Clean up a command queue, throw away everything. 659 */ 660 void 661 pckbc_cleanqueue(q) 662 struct pckbc_slotdata *q; 663 { 664 struct pckbc_devcmd *cmd; 665 #ifdef PCKBCDEBUG 666 int i; 667 #endif 668 669 while ((cmd = TAILQ_FIRST(&q->cmdqueue))) { 670 TAILQ_REMOVE(&q->cmdqueue, cmd, next); 671 #ifdef PCKBCDEBUG 672 printf("pckbc_cleanqueue: removing"); 673 for (i = 0; i < cmd->cmdlen; i++) 674 printf(" %02x", cmd->cmd[i]); 675 printf("\n"); 676 #endif 677 TAILQ_INSERT_TAIL(&q->freequeue, cmd, next); 678 } 679 } 680 681 /* 682 * Timeout error handler: clean queues and data port. 683 * XXX could be less invasive. 684 */ 685 void 686 pckbc_cleanup(self) 687 void *self; 688 { 689 struct pckbc_internal *t = self; 690 int s; 691 692 printf("pckbc: command timeout\n"); 693 694 s = spltty(); 695 696 if (t->t_slotdata[PCKBC_KBD_SLOT]) 697 pckbc_cleanqueue(t->t_slotdata[PCKBC_KBD_SLOT]); 698 if (t->t_slotdata[PCKBC_AUX_SLOT]) 699 pckbc_cleanqueue(t->t_slotdata[PCKBC_AUX_SLOT]); 700 701 while (bus_space_read_1(t->t_iot, t->t_ioh_c, 0) & KBS_DIB) { 702 KBD_DELAY; 703 (void) bus_space_read_1(t->t_iot, t->t_ioh_d, 0); 704 } 705 706 /* reset KBC? */ 707 708 splx(s); 709 } 710 711 /* 712 * Pass command to device during normal operation. 713 * to be called at spltty() 714 */ 715 void 716 pckbc_start(t, slot) 717 struct pckbc_internal *t; 718 pckbc_slot_t slot; 719 { 720 struct pckbc_slotdata *q = t->t_slotdata[slot]; 721 struct pckbc_devcmd *cmd = TAILQ_FIRST(&q->cmdqueue); 722 723 if (q->polling) { 724 do { 725 pckbc_poll_cmd1(t, slot, cmd); 726 if (cmd->status) 727 printf("pckbc_start: command error\n"); 728 729 TAILQ_REMOVE(&q->cmdqueue, cmd, next); 730 if (cmd->flags & KBC_CMDFLAG_SYNC) 731 wakeup(cmd); 732 else { 733 callout_stop(&t->t_cleanup); 734 TAILQ_INSERT_TAIL(&q->freequeue, cmd, next); 735 } 736 cmd = TAILQ_FIRST(&q->cmdqueue); 737 } while (cmd); 738 return; 739 } 740 741 if (!pckbc_send_devcmd(t, slot, cmd->cmd[cmd->cmdidx])) { 742 printf("pckbc_start: send error\n"); 743 /* XXX what now? */ 744 return; 745 } 746 } 747 748 /* 749 * Handle command responses coming in asynchonously, 750 * return nonzero if valid response. 751 * to be called at spltty() 752 */ 753 int 754 pckbc_cmdresponse(t, slot, data) 755 struct pckbc_internal *t; 756 pckbc_slot_t slot; 757 u_char data; 758 { 759 struct pckbc_slotdata *q = t->t_slotdata[slot]; 760 struct pckbc_devcmd *cmd = TAILQ_FIRST(&q->cmdqueue); 761 #ifdef DIAGNOSTIC 762 if (!cmd) 763 panic("pckbc_cmdresponse: no active command"); 764 #endif 765 if (cmd->cmdidx < cmd->cmdlen) { 766 if (data != KBC_DEVCMD_ACK && data != KBC_DEVCMD_RESEND) 767 return (0); 768 769 if (data == KBC_DEVCMD_RESEND) { 770 if (cmd->retries++ < 5) { 771 /* try again last command */ 772 goto restart; 773 } else { 774 printf("pckbc: cmd failed\n"); 775 cmd->status = EIO; 776 /* dequeue */ 777 } 778 } else { 779 if (++cmd->cmdidx < cmd->cmdlen) 780 goto restart; 781 if (cmd->responselen) 782 return (1); 783 /* else dequeue */ 784 } 785 } else if (cmd->responseidx < cmd->responselen) { 786 cmd->response[cmd->responseidx++] = data; 787 if (cmd->responseidx < cmd->responselen) 788 return (1); 789 /* else dequeue */ 790 } else 791 return (0); 792 793 /* dequeue: */ 794 TAILQ_REMOVE(&q->cmdqueue, cmd, next); 795 if (cmd->flags & KBC_CMDFLAG_SYNC) 796 wakeup(cmd); 797 else { 798 callout_stop(&t->t_cleanup); 799 TAILQ_INSERT_TAIL(&q->freequeue, cmd, next); 800 } 801 if (!CMD_IN_QUEUE(q)) 802 return (1); 803 restart: 804 pckbc_start(t, slot); 805 return (1); 806 } 807 808 /* 809 * Put command into the device's command queue, return zero or errno. 810 */ 811 int 812 pckbc_enqueue_cmd(self, slot, cmd, len, responselen, sync, respbuf) 813 pckbc_tag_t self; 814 pckbc_slot_t slot; 815 u_char *cmd; 816 int len, responselen, sync; 817 u_char *respbuf; 818 { 819 struct pckbc_internal *t = self; 820 struct pckbc_slotdata *q = t->t_slotdata[slot]; 821 struct pckbc_devcmd *nc; 822 int s, isactive, res = 0; 823 824 if ((len > 4) || (responselen > 4)) 825 return (EINVAL); 826 s = spltty(); 827 nc = TAILQ_FIRST(&q->freequeue); 828 if (nc) { 829 TAILQ_REMOVE(&q->freequeue, nc, next); 830 } 831 splx(s); 832 if (!nc) 833 return (ENOMEM); 834 835 bzero(nc, sizeof(*nc)); 836 bcopy(cmd, nc->cmd, len); 837 nc->cmdlen = len; 838 nc->responselen = responselen; 839 nc->flags = (sync ? KBC_CMDFLAG_SYNC : 0); 840 841 s = spltty(); 842 843 if (q->polling && sync) { 844 /* 845 * XXX We should poll until the queue is empty. 846 * But we don't come here normally, so make 847 * it simple and throw away everything. 848 */ 849 pckbc_cleanqueue(q); 850 } 851 852 isactive = CMD_IN_QUEUE(q); 853 TAILQ_INSERT_TAIL(&q->cmdqueue, nc, next); 854 if (!isactive) 855 pckbc_start(t, slot); 856 857 if (q->polling) 858 res = (sync ? nc->status : 0); 859 else if (sync) { 860 if ((res = tsleep(nc, 0, "kbccmd", 1*hz))) { 861 TAILQ_REMOVE(&q->cmdqueue, nc, next); 862 pckbc_cleanup(t); 863 } else 864 res = nc->status; 865 } else 866 callout_reset(&t->t_cleanup, hz, pckbc_cleanup, t); 867 868 if (sync) { 869 if (respbuf) 870 bcopy(nc->response, respbuf, responselen); 871 TAILQ_INSERT_TAIL(&q->freequeue, nc, next); 872 } 873 874 splx(s); 875 876 return (res); 877 } 878 879 void 880 pckbc_set_inputhandler(self, slot, func, arg, name) 881 pckbc_tag_t self; 882 pckbc_slot_t slot; 883 pckbc_inputfcn func; 884 void *arg; 885 char *name; 886 { 887 struct pckbc_internal *t = (struct pckbc_internal *)self; 888 struct pckbc_softc *sc = t->t_sc; 889 890 if (slot >= PCKBC_NSLOTS) 891 panic("pckbc_set_inputhandler: bad slot %d", slot); 892 893 (*sc->intr_establish)(sc, slot); 894 895 sc->inputhandler[slot] = func; 896 sc->inputarg[slot] = arg; 897 sc->subname[slot] = name; 898 } 899 900 int 901 pckbcintr(vsc) 902 void *vsc; 903 { 904 struct pckbc_softc *sc = (struct pckbc_softc *)vsc; 905 struct pckbc_internal *t = sc->id; 906 u_char stat; 907 pckbc_slot_t slot; 908 struct pckbc_slotdata *q; 909 int served = 0, data; 910 911 for(;;) { 912 stat = bus_space_read_1(t->t_iot, t->t_ioh_c, 0); 913 if (!(stat & KBS_DIB)) 914 break; 915 916 served = 1; 917 918 slot = (t->t_haveaux && (stat & 0x20)) ? 919 PCKBC_AUX_SLOT : PCKBC_KBD_SLOT; 920 q = t->t_slotdata[slot]; 921 922 if (!q) { 923 /* XXX do something for live insertion? */ 924 printf("pckbcintr: no dev for slot %d\n", slot); 925 KBD_DELAY; 926 (void) bus_space_read_1(t->t_iot, t->t_ioh_d, 0); 927 continue; 928 } 929 930 if (q->polling) 931 break; /* pckbc_poll_data() will get it */ 932 933 KBD_DELAY; 934 data = bus_space_read_1(t->t_iot, t->t_ioh_d, 0); 935 936 #if NRND > 0 937 rnd_add_uint32(&q->rnd_source, (stat<<8)|data); 938 #endif 939 if (CMD_IN_QUEUE(q) && pckbc_cmdresponse(t, slot, data)) 940 continue; 941 942 if (sc->inputhandler[slot]) 943 (*sc->inputhandler[slot])(sc->inputarg[slot], data); 944 #ifdef PCKBCDEBUG 945 else 946 printf("pckbcintr: slot %d lost %d\n", slot, data); 947 #endif 948 } 949 950 return (served); 951 } 952 953 int 954 pckbc_cnattach(iot, addr, cmd_offset, slot) 955 bus_space_tag_t iot; 956 bus_addr_t addr; 957 bus_size_t cmd_offset; 958 pckbc_slot_t slot; 959 { 960 bus_space_handle_t ioh_d, ioh_c; 961 int res = 0; 962 963 if (bus_space_map(iot, addr + KBDATAP, 1, 0, &ioh_d)) 964 return (ENXIO); 965 if (bus_space_map(iot, addr + cmd_offset, 1, 0, &ioh_c)) { 966 bus_space_unmap(iot, ioh_d, 1); 967 return (ENXIO); 968 } 969 970 pckbc_consdata.t_iot = iot; 971 pckbc_consdata.t_ioh_d = ioh_d; 972 pckbc_consdata.t_ioh_c = ioh_c; 973 pckbc_consdata.t_addr = addr; 974 callout_init(&pckbc_consdata.t_cleanup); 975 976 /* flush */ 977 (void) pckbc_poll_data1(iot, ioh_d, ioh_c, PCKBC_KBD_SLOT, 0); 978 979 /* selftest? */ 980 981 /* init cmd byte, enable ports */ 982 pckbc_consdata.t_cmdbyte = KC8_CPU; 983 if (!pckbc_put8042cmd(&pckbc_consdata)) { 984 printf("kbc: cmd word write error\n"); 985 res = EIO; 986 } 987 988 if (!res) { 989 #if (NPCKBD > 0) 990 res = pckbd_cnattach(&pckbc_consdata, slot); 991 #else 992 /* 993 * XXX This should be replaced with the `notyet' case 994 * XXX when all of the old PC-style console drivers 995 * XXX have gone away. When that happens, all of 996 * XXX the pckbc_machdep_cnattach() should be purged, 997 * XXX as well. 998 */ 999 #ifdef notyet 1000 res = ENXIO; 1001 #else 1002 res = pckbc_machdep_cnattach(&pckbc_consdata, slot); 1003 #endif 1004 #endif /* NPCKBD > 0 */ 1005 } 1006 1007 if (res) { 1008 bus_space_unmap(iot, pckbc_consdata.t_ioh_d, 1); 1009 bus_space_unmap(iot, pckbc_consdata.t_ioh_c, 1); 1010 } else { 1011 pckbc_consdata.t_slotdata[slot] = &pckbc_cons_slotdata; 1012 pckbc_init_slotdata(&pckbc_cons_slotdata); 1013 pckbc_console = 1; 1014 } 1015 1016 return (res); 1017 } 1018
Indexes created Fri Sep 26 08:10:20 GMT 2025