pckbc.c revision 1.6
1 /* $NetBSD: pckbc.c,v 1.6 2001/04/09 15:45:50 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 == 0x5a) { 375 t->t_haveaux = 1; 376 if (pckbc_attach_slot(sc, PCKBC_AUX_SLOT)) 377 cmdbits |= KC8_MENABLE; 378 } 379 #ifdef PCKBCDEBUG 380 else 381 printf("kbc: aux echo: %x\n", res); 382 #endif 383 384 nomouse: 385 /* enable needed interrupts */ 386 t->t_cmdbyte |= cmdbits; 387 if (!pckbc_put8042cmd(t)) 388 printf("kbc: cmd word write error\n"); 389 } 390 391 int 392 pckbcprint(aux, pnp) 393 void *aux; 394 const char *pnp; 395 { 396 struct pckbc_attach_args *pa = aux; 397 398 if (!pnp) 399 printf(" (%s slot)", pckbc_slot_names[pa->pa_slot]); 400 return (QUIET); 401 } 402 403 void 404 pckbc_init_slotdata(q) 405 struct pckbc_slotdata *q; 406 { 407 int i; 408 TAILQ_INIT(&q->cmdqueue); 409 TAILQ_INIT(&q->freequeue); 410 411 for (i = 0; i < NCMD; i++) { 412 TAILQ_INSERT_TAIL(&q->freequeue, &(q->cmds[i]), next); 413 } 414 q->polling = 0; 415 } 416 417 void 418 pckbc_flush(self, slot) 419 pckbc_tag_t self; 420 pckbc_slot_t slot; 421 { 422 struct pckbc_internal *t = self; 423 424 (void) pckbc_poll_data1(t->t_iot, t->t_ioh_d, t->t_ioh_c, 425 slot, t->t_haveaux); 426 } 427 428 int 429 pckbc_poll_data(self, slot) 430 pckbc_tag_t self; 431 pckbc_slot_t slot; 432 { 433 struct pckbc_internal *t = self; 434 struct pckbc_slotdata *q = t->t_slotdata[slot]; 435 int c; 436 437 c = pckbc_poll_data1(t->t_iot, t->t_ioh_d, t->t_ioh_c, 438 slot, t->t_haveaux); 439 if (c != -1 && q && CMD_IN_QUEUE(q)) { 440 /* we jumped into a running command - try to 441 deliver the response */ 442 if (pckbc_cmdresponse(t, slot, c)) 443 return (-1); 444 } 445 return (c); 446 } 447 448 /* 449 * switch scancode translation on / off 450 * return nonzero on success 451 */ 452 int 453 pckbc_xt_translation(self, slot, on) 454 pckbc_tag_t self; 455 pckbc_slot_t slot; 456 int on; 457 { 458 struct pckbc_internal *t = self; 459 int ison; 460 461 if (slot != PCKBC_KBD_SLOT) { 462 /* translation only for kbd slot */ 463 if (on) 464 return (0); 465 else 466 return (1); 467 } 468 469 ison = t->t_cmdbyte & KC8_TRANS; 470 if ((on && ison) || (!on && !ison)) 471 return (1); 472 473 t->t_cmdbyte ^= KC8_TRANS; 474 if (!pckbc_put8042cmd(t)) 475 return (0); 476 477 /* read back to be sure */ 478 if (!pckbc_get8042cmd(t)) 479 return (0); 480 481 ison = t->t_cmdbyte & KC8_TRANS; 482 if ((on && ison) || (!on && !ison)) 483 return (1); 484 return (0); 485 } 486 487 static struct pckbc_portcmd { 488 u_char cmd_en, cmd_dis; 489 } pckbc_portcmd[2] = { 490 { 491 KBC_KBDENABLE, KBC_KBDDISABLE, 492 }, { 493 KBC_AUXENABLE, KBC_AUXDISABLE, 494 } 495 }; 496 497 void 498 pckbc_slot_enable(self, slot, on) 499 pckbc_tag_t self; 500 pckbc_slot_t slot; 501 int on; 502 { 503 struct pckbc_internal *t = (struct pckbc_internal *)self; 504 struct pckbc_portcmd *cmd; 505 506 cmd = &pckbc_portcmd[slot]; 507 508 if (!pckbc_send_cmd(t->t_iot, t->t_ioh_c, 509 on ? cmd->cmd_en : cmd->cmd_dis)) 510 printf("pckbc_slot_enable(%d) failed\n", on); 511 } 512 513 void 514 pckbc_set_poll(self, slot, on) 515 pckbc_tag_t self; 516 pckbc_slot_t slot; 517 int on; 518 { 519 struct pckbc_internal *t = (struct pckbc_internal *)self; 520 521 t->t_slotdata[slot]->polling = on; 522 523 if (!on) { 524 int s; 525 526 /* 527 * If disabling polling on a device that's been configured, 528 * make sure there are no bytes left in the FIFO, holding up 529 * the interrupt line. Otherwise we won't get any further 530 * interrupts. 531 */ 532 if (t->t_sc) { 533 s = spltty(); 534 pckbcintr(t->t_sc); 535 splx(s); 536 } 537 } 538 } 539 540 /* 541 * Pass command to device, poll for ACK and data. 542 * to be called at spltty() 543 */ 544 static void 545 pckbc_poll_cmd1(t, slot, cmd) 546 struct pckbc_internal *t; 547 pckbc_slot_t slot; 548 struct pckbc_devcmd *cmd; 549 { 550 bus_space_tag_t iot = t->t_iot; 551 bus_space_handle_t ioh_d = t->t_ioh_d; 552 bus_space_handle_t ioh_c = t->t_ioh_c; 553 int i, c = 0; 554 555 while (cmd->cmdidx < cmd->cmdlen) { 556 if (!pckbc_send_devcmd(t, slot, cmd->cmd[cmd->cmdidx])) { 557 printf("pckbc_cmd: send error\n"); 558 cmd->status = EIO; 559 return; 560 } 561 for (i = 10; i; i--) { /* 1s ??? */ 562 c = pckbc_poll_data1(iot, ioh_d, ioh_c, slot, 563 t->t_haveaux); 564 if (c != -1) 565 break; 566 } 567 568 if (c == KBC_DEVCMD_ACK) { 569 cmd->cmdidx++; 570 continue; 571 } 572 if (c == KBC_DEVCMD_RESEND) { 573 #ifdef PCKBCDEBUG 574 printf("pckbc_cmd: RESEND\n"); 575 #endif 576 if (cmd->retries++ < 5) 577 continue; 578 else { 579 #ifdef PCKBCDEBUG 580 printf("pckbc: cmd failed\n"); 581 #endif 582 cmd->status = EIO; 583 return; 584 } 585 } 586 if (c == -1) { 587 #ifdef PCKBCDEBUG 588 printf("pckbc_cmd: timeout\n"); 589 #endif 590 cmd->status = EIO; 591 return; 592 } 593 #ifdef PCKBCDEBUG 594 printf("pckbc_cmd: lost 0x%x\n", c); 595 #endif 596 } 597 598 while (cmd->responseidx < cmd->responselen) { 599 if (cmd->flags & KBC_CMDFLAG_SLOW) 600 i = 100; /* 10s ??? */ 601 else 602 i = 10; /* 1s ??? */ 603 while (i--) { 604 c = pckbc_poll_data1(iot, ioh_d, ioh_c, slot, 605 t->t_haveaux); 606 if (c != -1) 607 break; 608 } 609 if (c == -1) { 610 #ifdef PCKBCDEBUG 611 printf("pckbc_cmd: no data\n"); 612 #endif 613 cmd->status = ETIMEDOUT; 614 return; 615 } else 616 cmd->response[cmd->responseidx++] = c; 617 } 618 } 619 620 /* for use in autoconfiguration */ 621 int 622 pckbc_poll_cmd(self, slot, cmd, len, responselen, respbuf, slow) 623 pckbc_tag_t self; 624 pckbc_slot_t slot; 625 u_char *cmd; 626 int len, responselen; 627 u_char *respbuf; 628 int slow; 629 { 630 struct pckbc_internal *t = self; 631 struct pckbc_devcmd nc; 632 633 if ((len > 4) || (responselen > 4)) 634 return (EINVAL); 635 636 bzero(&nc, sizeof(nc)); 637 bcopy(cmd, nc.cmd, len); 638 nc.cmdlen = len; 639 nc.responselen = responselen; 640 nc.flags = (slow ? KBC_CMDFLAG_SLOW : 0); 641 642 pckbc_poll_cmd1(t, slot, &nc); 643 644 if (nc.status == 0 && respbuf) 645 bcopy(nc.response, respbuf, responselen); 646 647 return (nc.status); 648 } 649 650 /* 651 * Clean up a command queue, throw away everything. 652 */ 653 void 654 pckbc_cleanqueue(q) 655 struct pckbc_slotdata *q; 656 { 657 struct pckbc_devcmd *cmd; 658 #ifdef PCKBCDEBUG 659 int i; 660 #endif 661 662 while ((cmd = TAILQ_FIRST(&q->cmdqueue))) { 663 TAILQ_REMOVE(&q->cmdqueue, cmd, next); 664 #ifdef PCKBCDEBUG 665 printf("pckbc_cleanqueue: removing"); 666 for (i = 0; i < cmd->cmdlen; i++) 667 printf(" %02x", cmd->cmd[i]); 668 printf("\n"); 669 #endif 670 TAILQ_INSERT_TAIL(&q->freequeue, cmd, next); 671 } 672 } 673 674 /* 675 * Timeout error handler: clean queues and data port. 676 * XXX could be less invasive. 677 */ 678 void 679 pckbc_cleanup(self) 680 void *self; 681 { 682 struct pckbc_internal *t = self; 683 int s; 684 685 printf("pckbc: command timeout\n"); 686 687 s = spltty(); 688 689 if (t->t_slotdata[PCKBC_KBD_SLOT]) 690 pckbc_cleanqueue(t->t_slotdata[PCKBC_KBD_SLOT]); 691 if (t->t_slotdata[PCKBC_AUX_SLOT]) 692 pckbc_cleanqueue(t->t_slotdata[PCKBC_AUX_SLOT]); 693 694 while (bus_space_read_1(t->t_iot, t->t_ioh_c, 0) & KBS_DIB) { 695 KBD_DELAY; 696 (void) bus_space_read_1(t->t_iot, t->t_ioh_d, 0); 697 } 698 699 /* reset KBC? */ 700 701 splx(s); 702 } 703 704 /* 705 * Pass command to device during normal operation. 706 * to be called at spltty() 707 */ 708 void 709 pckbc_start(t, slot) 710 struct pckbc_internal *t; 711 pckbc_slot_t slot; 712 { 713 struct pckbc_slotdata *q = t->t_slotdata[slot]; 714 struct pckbc_devcmd *cmd = TAILQ_FIRST(&q->cmdqueue); 715 716 if (q->polling) { 717 do { 718 pckbc_poll_cmd1(t, slot, cmd); 719 if (cmd->status) 720 printf("pckbc_start: command error\n"); 721 722 TAILQ_REMOVE(&q->cmdqueue, cmd, next); 723 if (cmd->flags & KBC_CMDFLAG_SYNC) 724 wakeup(cmd); 725 else { 726 callout_stop(&t->t_cleanup); 727 TAILQ_INSERT_TAIL(&q->freequeue, cmd, next); 728 } 729 cmd = TAILQ_FIRST(&q->cmdqueue); 730 } while (cmd); 731 return; 732 } 733 734 if (!pckbc_send_devcmd(t, slot, cmd->cmd[cmd->cmdidx])) { 735 printf("pckbc_start: send error\n"); 736 /* XXX what now? */ 737 return; 738 } 739 } 740 741 /* 742 * Handle command responses coming in asynchonously, 743 * return nonzero if valid response. 744 * to be called at spltty() 745 */ 746 int 747 pckbc_cmdresponse(t, slot, data) 748 struct pckbc_internal *t; 749 pckbc_slot_t slot; 750 u_char data; 751 { 752 struct pckbc_slotdata *q = t->t_slotdata[slot]; 753 struct pckbc_devcmd *cmd = TAILQ_FIRST(&q->cmdqueue); 754 #ifdef DIAGNOSTIC 755 if (!cmd) 756 panic("pckbc_cmdresponse: no active command"); 757 #endif 758 if (cmd->cmdidx < cmd->cmdlen) { 759 if (data != KBC_DEVCMD_ACK && data != KBC_DEVCMD_RESEND) 760 return (0); 761 762 if (data == KBC_DEVCMD_RESEND) { 763 if (cmd->retries++ < 5) { 764 /* try again last command */ 765 goto restart; 766 } else { 767 printf("pckbc: cmd failed\n"); 768 cmd->status = EIO; 769 /* dequeue */ 770 } 771 } else { 772 if (++cmd->cmdidx < cmd->cmdlen) 773 goto restart; 774 if (cmd->responselen) 775 return (1); 776 /* else dequeue */ 777 } 778 } else if (cmd->responseidx < cmd->responselen) { 779 cmd->response[cmd->responseidx++] = data; 780 if (cmd->responseidx < cmd->responselen) 781 return (1); 782 /* else dequeue */ 783 } else 784 return (0); 785 786 /* dequeue: */ 787 TAILQ_REMOVE(&q->cmdqueue, cmd, next); 788 if (cmd->flags & KBC_CMDFLAG_SYNC) 789 wakeup(cmd); 790 else { 791 callout_stop(&t->t_cleanup); 792 TAILQ_INSERT_TAIL(&q->freequeue, cmd, next); 793 } 794 if (!CMD_IN_QUEUE(q)) 795 return (1); 796 restart: 797 pckbc_start(t, slot); 798 return (1); 799 } 800 801 /* 802 * Put command into the device's command queue, return zero or errno. 803 */ 804 int 805 pckbc_enqueue_cmd(self, slot, cmd, len, responselen, sync, respbuf) 806 pckbc_tag_t self; 807 pckbc_slot_t slot; 808 u_char *cmd; 809 int len, responselen, sync; 810 u_char *respbuf; 811 { 812 struct pckbc_internal *t = self; 813 struct pckbc_slotdata *q = t->t_slotdata[slot]; 814 struct pckbc_devcmd *nc; 815 int s, isactive, res = 0; 816 817 if ((len > 4) || (responselen > 4)) 818 return (EINVAL); 819 s = spltty(); 820 nc = TAILQ_FIRST(&q->freequeue); 821 if (nc) { 822 TAILQ_REMOVE(&q->freequeue, nc, next); 823 } 824 splx(s); 825 if (!nc) 826 return (ENOMEM); 827 828 bzero(nc, sizeof(*nc)); 829 bcopy(cmd, nc->cmd, len); 830 nc->cmdlen = len; 831 nc->responselen = responselen; 832 nc->flags = (sync ? KBC_CMDFLAG_SYNC : 0); 833 834 s = spltty(); 835 836 if (q->polling && sync) { 837 /* 838 * XXX We should poll until the queue is empty. 839 * But we don't come here normally, so make 840 * it simple and throw away everything. 841 */ 842 pckbc_cleanqueue(q); 843 } 844 845 isactive = CMD_IN_QUEUE(q); 846 TAILQ_INSERT_TAIL(&q->cmdqueue, nc, next); 847 if (!isactive) 848 pckbc_start(t, slot); 849 850 if (q->polling) 851 res = (sync ? nc->status : 0); 852 else if (sync) { 853 if ((res = tsleep(nc, 0, "kbccmd", 1*hz))) { 854 TAILQ_REMOVE(&q->cmdqueue, nc, next); 855 pckbc_cleanup(t); 856 } else 857 res = nc->status; 858 } else 859 callout_reset(&t->t_cleanup, hz, pckbc_cleanup, t); 860 861 if (sync) { 862 if (respbuf) 863 bcopy(nc->response, respbuf, responselen); 864 TAILQ_INSERT_TAIL(&q->freequeue, nc, next); 865 } 866 867 splx(s); 868 869 return (res); 870 } 871 872 void 873 pckbc_set_inputhandler(self, slot, func, arg, name) 874 pckbc_tag_t self; 875 pckbc_slot_t slot; 876 pckbc_inputfcn func; 877 void *arg; 878 char *name; 879 { 880 struct pckbc_internal *t = (struct pckbc_internal *)self; 881 struct pckbc_softc *sc = t->t_sc; 882 883 if (slot >= PCKBC_NSLOTS) 884 panic("pckbc_set_inputhandler: bad slot %d", slot); 885 886 (*sc->intr_establish)(sc, slot); 887 888 sc->inputhandler[slot] = func; 889 sc->inputarg[slot] = arg; 890 sc->subname[slot] = name; 891 } 892 893 int 894 pckbcintr(vsc) 895 void *vsc; 896 { 897 struct pckbc_softc *sc = (struct pckbc_softc *)vsc; 898 struct pckbc_internal *t = sc->id; 899 u_char stat; 900 pckbc_slot_t slot; 901 struct pckbc_slotdata *q; 902 int served = 0, data; 903 904 for(;;) { 905 stat = bus_space_read_1(t->t_iot, t->t_ioh_c, 0); 906 if (!(stat & KBS_DIB)) 907 break; 908 909 served = 1; 910 911 slot = (t->t_haveaux && (stat & 0x20)) ? 912 PCKBC_AUX_SLOT : PCKBC_KBD_SLOT; 913 q = t->t_slotdata[slot]; 914 915 if (!q) { 916 /* XXX do something for live insertion? */ 917 printf("pckbcintr: no dev for slot %d\n", slot); 918 KBD_DELAY; 919 (void) bus_space_read_1(t->t_iot, t->t_ioh_d, 0); 920 continue; 921 } 922 923 if (q->polling) 924 break; /* pckbc_poll_data() will get it */ 925 926 KBD_DELAY; 927 data = bus_space_read_1(t->t_iot, t->t_ioh_d, 0); 928 929 #if NRND > 0 930 rnd_add_uint32(&q->rnd_source, (stat<<8)|data); 931 #endif 932 if (CMD_IN_QUEUE(q) && pckbc_cmdresponse(t, slot, data)) 933 continue; 934 935 if (sc->inputhandler[slot]) 936 (*sc->inputhandler[slot])(sc->inputarg[slot], data); 937 #ifdef PCKBCDEBUG 938 else 939 printf("pckbcintr: slot %d lost %d\n", slot, data); 940 #endif 941 } 942 943 return (served); 944 } 945 946 int 947 pckbc_cnattach(iot, addr, cmd_offset, slot) 948 bus_space_tag_t iot; 949 bus_addr_t addr; 950 bus_size_t cmd_offset; 951 pckbc_slot_t slot; 952 { 953 bus_space_handle_t ioh_d, ioh_c; 954 int res = 0; 955 956 if (bus_space_map(iot, addr + KBDATAP, 1, 0, &ioh_d)) 957 return (ENXIO); 958 if (bus_space_map(iot, addr + cmd_offset, 1, 0, &ioh_c)) { 959 bus_space_unmap(iot, ioh_d, 1); 960 return (ENXIO); 961 } 962 963 pckbc_consdata.t_iot = iot; 964 pckbc_consdata.t_ioh_d = ioh_d; 965 pckbc_consdata.t_ioh_c = ioh_c; 966 pckbc_consdata.t_addr = addr; 967 callout_init(&pckbc_consdata.t_cleanup); 968 969 /* flush */ 970 (void) pckbc_poll_data1(iot, ioh_d, ioh_c, PCKBC_KBD_SLOT, 0); 971 972 /* selftest? */ 973 974 /* init cmd byte, enable ports */ 975 pckbc_consdata.t_cmdbyte = KC8_CPU; 976 if (!pckbc_put8042cmd(&pckbc_consdata)) { 977 printf("kbc: cmd word write error\n"); 978 res = EIO; 979 } 980 981 if (!res) { 982 #if (NPCKBD > 0) 983 res = pckbd_cnattach(&pckbc_consdata, slot); 984 #else 985 /* 986 * XXX This should be replaced with the `notyet' case 987 * XXX when all of the old PC-style console drivers 988 * XXX have gone away. When that happens, all of 989 * XXX the pckbc_machdep_cnattach() should be purged, 990 * XXX as well. 991 */ 992 #ifdef notyet 993 res = ENXIO; 994 #else 995 res = pckbc_machdep_cnattach(&pckbc_consdata, slot); 996 #endif 997 #endif /* NPCKBD > 0 */ 998 } 999 1000 if (res) { 1001 bus_space_unmap(iot, pckbc_consdata.t_ioh_d, 1); 1002 bus_space_unmap(iot, pckbc_consdata.t_ioh_c, 1); 1003 } else { 1004 pckbc_consdata.t_slotdata[slot] = &pckbc_cons_slotdata; 1005 pckbc_init_slotdata(&pckbc_cons_slotdata); 1006 pckbc_console = 1; 1007 } 1008 1009 return (res); 1010 } 1011
Indexes created Thu Sep 25 16:09:42 GMT 2025