Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/vkbd/vkbd.c
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1 /* 2 * vkbd.c 3 */ 4 5 /*- 6 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 7 * 8 * Copyright (c) 2004 Maksim Yevmenkin <m_evmenkin@yahoo.com> 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $Id: vkbd.c,v 1.20 2004/11/15 23:53:30 max Exp $ 33 * $FreeBSD$ 34 */ 35 36 #include "opt_kbd.h" 37 38 #include <sys/param.h> 39 #include <sys/conf.h> 40 #include <sys/eventhandler.h> 41 #include <sys/fcntl.h> 42 #include <sys/kbio.h> 43 #include <sys/kernel.h> 44 #include <sys/limits.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/module.h> 48 #include <sys/mutex.h> 49 #include <sys/poll.h> 50 #include <sys/proc.h> 51 #include <sys/queue.h> 52 #include <sys/selinfo.h> 53 #include <sys/systm.h> 54 #include <sys/taskqueue.h> 55 #include <sys/uio.h> 56 #include <dev/kbd/kbdreg.h> 57 #include <dev/kbd/kbdtables.h> 58 #include <dev/vkbd/vkbd_var.h> 59 60 #define DEVICE_NAME "vkbdctl" 61 #define KEYBOARD_NAME "vkbd" 62 63 MALLOC_DECLARE(M_VKBD); 64 MALLOC_DEFINE(M_VKBD, KEYBOARD_NAME, "Virtual AT keyboard"); 65 66 /***************************************************************************** 67 ***************************************************************************** 68 ** Keyboard state 69 ***************************************************************************** 70 *****************************************************************************/ 71 72 /* 73 * XXX 74 * For now rely on Giant mutex to protect our data structures. 75 * Just like the rest of keyboard drivers and syscons(4) do. 76 */ 77 78 #if 0 /* not yet */ 79 #define VKBD_LOCK_DECL struct mtx ks_lock 80 #define VKBD_LOCK_INIT(s) mtx_init(&(s)->ks_lock, "vkbd_lock", NULL, MTX_DEF|MTX_RECURSE) 81 #define VKBD_LOCK_DESTROY(s) mtx_destroy(&(s)->ks_lock) 82 #define VKBD_LOCK(s) mtx_lock(&(s)->ks_lock) 83 #define VKBD_UNLOCK(s) mtx_unlock(&(s)->ks_lock) 84 #define VKBD_LOCK_ASSERT(s, w) mtx_assert(&(s)->ks_lock, w) 85 #define VKBD_SLEEP(s, f, d, t) \ 86 msleep(&(s)->f, &(s)->ks_lock, PCATCH | (PZERO + 1), d, t) 87 #else 88 #define VKBD_LOCK_DECL 89 #define VKBD_LOCK_INIT(s) 90 #define VKBD_LOCK_DESTROY(s) 91 #define VKBD_LOCK(s) 92 #define VKBD_UNLOCK(s) 93 #define VKBD_LOCK_ASSERT(s, w) 94 #define VKBD_SLEEP(s, f, d, t) tsleep(&(s)->f, PCATCH | (PZERO + 1), d, t) 95 #endif 96 97 #define VKBD_KEYBOARD(d) \ 98 kbd_get_keyboard(kbd_find_keyboard(KEYBOARD_NAME, dev2unit(d))) 99 100 /* vkbd queue */ 101 struct vkbd_queue 102 { 103 int q[VKBD_Q_SIZE]; /* queue */ 104 int head; /* index of the first code */ 105 int tail; /* index of the last code */ 106 int cc; /* number of codes in queue */ 107 }; 108 109 typedef struct vkbd_queue vkbd_queue_t; 110 111 /* vkbd state */ 112 struct vkbd_state 113 { 114 struct cdev *ks_dev; /* control device */ 115 116 struct selinfo ks_rsel; /* select(2) */ 117 struct selinfo ks_wsel; 118 119 vkbd_queue_t ks_inq; /* input key codes queue */ 120 struct task ks_task; /* interrupt task */ 121 122 int ks_flags; /* flags */ 123 #define OPEN (1 << 0) /* control device is open */ 124 #define COMPOSE (1 << 1) /* compose flag */ 125 #define STATUS (1 << 2) /* status has changed */ 126 #define TASK (1 << 3) /* interrupt task queued */ 127 #define READ (1 << 4) /* read pending */ 128 #define WRITE (1 << 5) /* write pending */ 129 130 int ks_mode; /* K_XLATE, K_RAW, K_CODE */ 131 int ks_polling; /* polling flag */ 132 int ks_state; /* shift/lock key state */ 133 int ks_accents; /* accent key index (> 0) */ 134 u_int ks_composed_char; /* composed char code */ 135 u_char ks_prefix; /* AT scan code prefix */ 136 137 VKBD_LOCK_DECL; 138 }; 139 140 typedef struct vkbd_state vkbd_state_t; 141 142 /***************************************************************************** 143 ***************************************************************************** 144 ** Character device 145 ***************************************************************************** 146 *****************************************************************************/ 147 148 static void vkbd_dev_clone(void *, struct ucred *, char *, int, 149 struct cdev **); 150 static d_open_t vkbd_dev_open; 151 static d_close_t vkbd_dev_close; 152 static d_read_t vkbd_dev_read; 153 static d_write_t vkbd_dev_write; 154 static d_ioctl_t vkbd_dev_ioctl; 155 static d_poll_t vkbd_dev_poll; 156 static void vkbd_dev_intr(void *, int); 157 static void vkbd_status_changed(vkbd_state_t *); 158 static int vkbd_data_ready(vkbd_state_t *); 159 static int vkbd_data_read(vkbd_state_t *, int); 160 161 static struct cdevsw vkbd_dev_cdevsw = { 162 .d_version = D_VERSION, 163 .d_flags = D_NEEDGIANT | D_NEEDMINOR, 164 .d_open = vkbd_dev_open, 165 .d_close = vkbd_dev_close, 166 .d_read = vkbd_dev_read, 167 .d_write = vkbd_dev_write, 168 .d_ioctl = vkbd_dev_ioctl, 169 .d_poll = vkbd_dev_poll, 170 .d_name = DEVICE_NAME, 171 }; 172 173 static struct clonedevs *vkbd_dev_clones = NULL; 174 175 /* Clone device */ 176 static void 177 vkbd_dev_clone(void *arg, struct ucred *cred, char *name, int namelen, 178 struct cdev **dev) 179 { 180 int unit; 181 182 if (*dev != NULL) 183 return; 184 185 if (strcmp(name, DEVICE_NAME) == 0) 186 unit = -1; 187 else if (dev_stdclone(name, NULL, DEVICE_NAME, &unit) != 1) 188 return; /* don't recognize the name */ 189 190 /* find any existing device, or allocate new unit number */ 191 if (clone_create(&vkbd_dev_clones, &vkbd_dev_cdevsw, &unit, dev, 0)) 192 *dev = make_dev_credf(MAKEDEV_REF, &vkbd_dev_cdevsw, unit, 193 cred, UID_ROOT, GID_WHEEL, 0600, DEVICE_NAME "%d", 194 unit); 195 } 196 197 /* Open device */ 198 static int 199 vkbd_dev_open(struct cdev *dev, int flag, int mode, struct thread *td) 200 { 201 int unit = dev2unit(dev), error; 202 keyboard_switch_t *sw = NULL; 203 keyboard_t *kbd = NULL; 204 vkbd_state_t *state = (vkbd_state_t *) dev->si_drv1; 205 206 /* XXX FIXME: dev->si_drv1 locking */ 207 if (state == NULL) { 208 if ((sw = kbd_get_switch(KEYBOARD_NAME)) == NULL) 209 return (ENXIO); 210 211 if ((error = (*sw->probe)(unit, NULL, 0)) != 0 || 212 (error = (*sw->init)(unit, &kbd, NULL, 0)) != 0) 213 return (error); 214 215 state = (vkbd_state_t *) kbd->kb_data; 216 217 if ((error = (*sw->enable)(kbd)) != 0) { 218 (*sw->term)(kbd); 219 return (error); 220 } 221 222 #ifdef KBD_INSTALL_CDEV 223 if ((error = kbd_attach(kbd)) != 0) { 224 (*sw->disable)(kbd); 225 (*sw->term)(kbd); 226 return (error); 227 } 228 #endif /* def KBD_INSTALL_CDEV */ 229 230 dev->si_drv1 = kbd->kb_data; 231 } 232 233 VKBD_LOCK(state); 234 235 if (state->ks_flags & OPEN) { 236 VKBD_UNLOCK(state); 237 return (EBUSY); 238 } 239 240 state->ks_flags |= OPEN; 241 state->ks_dev = dev; 242 243 VKBD_UNLOCK(state); 244 245 return (0); 246 } 247 248 /* Close device */ 249 static int 250 vkbd_dev_close(struct cdev *dev, int foo, int bar, struct thread *td) 251 { 252 keyboard_t *kbd = VKBD_KEYBOARD(dev); 253 vkbd_state_t *state = NULL; 254 255 if (kbd == NULL) 256 return (ENXIO); 257 258 if (kbd->kb_data == NULL || kbd->kb_data != dev->si_drv1) 259 panic("%s: kbd->kb_data != dev->si_drv1\n", __func__); 260 261 state = (vkbd_state_t *) kbd->kb_data; 262 263 VKBD_LOCK(state); 264 265 /* wait for interrupt task */ 266 while (state->ks_flags & TASK) 267 VKBD_SLEEP(state, ks_task, "vkbdc", 0); 268 269 /* wakeup poll()ers */ 270 selwakeuppri(&state->ks_rsel, PZERO + 1); 271 selwakeuppri(&state->ks_wsel, PZERO + 1); 272 273 state->ks_flags &= ~OPEN; 274 state->ks_dev = NULL; 275 state->ks_inq.head = state->ks_inq.tail = state->ks_inq.cc = 0; 276 277 VKBD_UNLOCK(state); 278 279 kbdd_disable(kbd); 280 #ifdef KBD_INSTALL_CDEV 281 kbd_detach(kbd); 282 #endif /* def KBD_INSTALL_CDEV */ 283 kbdd_term(kbd); 284 285 /* XXX FIXME: dev->si_drv1 locking */ 286 dev->si_drv1 = NULL; 287 288 return (0); 289 } 290 291 /* Read status */ 292 static int 293 vkbd_dev_read(struct cdev *dev, struct uio *uio, int flag) 294 { 295 keyboard_t *kbd = VKBD_KEYBOARD(dev); 296 vkbd_state_t *state = NULL; 297 vkbd_status_t status; 298 int error; 299 300 if (kbd == NULL) 301 return (ENXIO); 302 303 if (uio->uio_resid != sizeof(status)) 304 return (EINVAL); 305 306 if (kbd->kb_data == NULL || kbd->kb_data != dev->si_drv1) 307 panic("%s: kbd->kb_data != dev->si_drv1\n", __func__); 308 309 state = (vkbd_state_t *) kbd->kb_data; 310 311 VKBD_LOCK(state); 312 313 if (state->ks_flags & READ) { 314 VKBD_UNLOCK(state); 315 return (EALREADY); 316 } 317 318 state->ks_flags |= READ; 319 again: 320 if (state->ks_flags & STATUS) { 321 state->ks_flags &= ~STATUS; 322 323 status.mode = state->ks_mode; 324 status.leds = KBD_LED_VAL(kbd); 325 status.lock = state->ks_state & LOCK_MASK; 326 status.delay = kbd->kb_delay1; 327 status.rate = kbd->kb_delay2; 328 bzero(status.reserved, sizeof(status.reserved)); 329 330 error = uiomove(&status, sizeof(status), uio); 331 } else { 332 if (flag & O_NONBLOCK) { 333 error = EWOULDBLOCK; 334 goto done; 335 } 336 337 error = VKBD_SLEEP(state, ks_flags, "vkbdr", 0); 338 if (error != 0) 339 goto done; 340 341 goto again; 342 } 343 done: 344 state->ks_flags &= ~READ; 345 346 VKBD_UNLOCK(state); 347 348 return (error); 349 } 350 351 /* Write scancodes */ 352 static int 353 vkbd_dev_write(struct cdev *dev, struct uio *uio, int flag) 354 { 355 keyboard_t *kbd = VKBD_KEYBOARD(dev); 356 vkbd_state_t *state = NULL; 357 vkbd_queue_t *q = NULL; 358 int error, avail, bytes; 359 360 if (kbd == NULL) 361 return (ENXIO); 362 363 if (uio->uio_resid <= 0) 364 return (EINVAL); 365 366 if (kbd->kb_data == NULL || kbd->kb_data != dev->si_drv1) 367 panic("%s: kbd->kb_data != dev->si_drv1\n", __func__); 368 369 state = (vkbd_state_t *) kbd->kb_data; 370 371 VKBD_LOCK(state); 372 373 if (state->ks_flags & WRITE) { 374 VKBD_UNLOCK(state); 375 return (EALREADY); 376 } 377 378 state->ks_flags |= WRITE; 379 error = 0; 380 q = &state->ks_inq; 381 382 while (uio->uio_resid >= sizeof(q->q[0])) { 383 if (q->head == q->tail) { 384 if (q->cc == 0) 385 avail = nitems(q->q) - q->head; 386 else 387 avail = 0; /* queue must be full */ 388 } else if (q->head < q->tail) 389 avail = nitems(q->q) - q->tail; 390 else 391 avail = q->head - q->tail; 392 393 if (avail == 0) { 394 if (flag & O_NONBLOCK) { 395 error = EWOULDBLOCK; 396 break; 397 } 398 399 error = VKBD_SLEEP(state, ks_inq, "vkbdw", 0); 400 if (error != 0) 401 break; 402 } else { 403 bytes = avail * sizeof(q->q[0]); 404 if (bytes > uio->uio_resid) { 405 avail = uio->uio_resid / sizeof(q->q[0]); 406 bytes = avail * sizeof(q->q[0]); 407 } 408 409 error = uiomove((void *) &q->q[q->tail], bytes, uio); 410 if (error != 0) 411 break; 412 413 q->cc += avail; 414 q->tail += avail; 415 if (q->tail == nitems(q->q)) 416 q->tail = 0; 417 418 /* queue interrupt task if needed */ 419 if (!(state->ks_flags & TASK) && 420 taskqueue_enqueue(taskqueue_swi_giant, &state->ks_task) == 0) 421 state->ks_flags |= TASK; 422 } 423 } 424 425 state->ks_flags &= ~WRITE; 426 427 VKBD_UNLOCK(state); 428 429 return (error); 430 } 431 432 /* Process ioctl */ 433 static int 434 vkbd_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 435 { 436 keyboard_t *kbd = VKBD_KEYBOARD(dev); 437 438 return ((kbd == NULL)? ENXIO : kbdd_ioctl(kbd, cmd, data)); 439 } 440 441 /* Poll device */ 442 static int 443 vkbd_dev_poll(struct cdev *dev, int events, struct thread *td) 444 { 445 vkbd_state_t *state = (vkbd_state_t *) dev->si_drv1; 446 vkbd_queue_t *q = NULL; 447 int revents = 0; 448 449 if (state == NULL) 450 return (ENXIO); 451 452 VKBD_LOCK(state); 453 454 q = &state->ks_inq; 455 456 if (events & (POLLIN | POLLRDNORM)) { 457 if (state->ks_flags & STATUS) 458 revents |= events & (POLLIN | POLLRDNORM); 459 else 460 selrecord(td, &state->ks_rsel); 461 } 462 463 if (events & (POLLOUT | POLLWRNORM)) { 464 if (q->cc < nitems(q->q)) 465 revents |= events & (POLLOUT | POLLWRNORM); 466 else 467 selrecord(td, &state->ks_wsel); 468 } 469 470 VKBD_UNLOCK(state); 471 472 return (revents); 473 } 474 475 /* Interrupt handler */ 476 void 477 vkbd_dev_intr(void *xkbd, int pending) 478 { 479 keyboard_t *kbd = (keyboard_t *) xkbd; 480 vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data; 481 482 kbdd_intr(kbd, NULL); 483 484 VKBD_LOCK(state); 485 486 state->ks_flags &= ~TASK; 487 wakeup(&state->ks_task); 488 489 VKBD_UNLOCK(state); 490 } 491 492 /* Set status change flags */ 493 static void 494 vkbd_status_changed(vkbd_state_t *state) 495 { 496 VKBD_LOCK_ASSERT(state, MA_OWNED); 497 498 if (!(state->ks_flags & STATUS)) { 499 state->ks_flags |= STATUS; 500 selwakeuppri(&state->ks_rsel, PZERO + 1); 501 wakeup(&state->ks_flags); 502 } 503 } 504 505 /* Check if we have data in the input queue */ 506 static int 507 vkbd_data_ready(vkbd_state_t *state) 508 { 509 VKBD_LOCK_ASSERT(state, MA_OWNED); 510 511 return (state->ks_inq.cc > 0); 512 } 513 514 /* Read one code from the input queue */ 515 static int 516 vkbd_data_read(vkbd_state_t *state, int wait) 517 { 518 vkbd_queue_t *q = &state->ks_inq; 519 int c; 520 521 VKBD_LOCK_ASSERT(state, MA_OWNED); 522 523 if (q->cc == 0) 524 return (-1); 525 526 /* get first code from the queue */ 527 q->cc --; 528 c = q->q[q->head ++]; 529 if (q->head == nitems(q->q)) 530 q->head = 0; 531 532 /* wakeup ks_inq writers/poll()ers */ 533 selwakeuppri(&state->ks_wsel, PZERO + 1); 534 wakeup(q); 535 536 return (c); 537 } 538 539 /**************************************************************************** 540 **************************************************************************** 541 ** Keyboard driver 542 **************************************************************************** 543 ****************************************************************************/ 544 545 static int vkbd_configure(int flags); 546 static kbd_probe_t vkbd_probe; 547 static kbd_init_t vkbd_init; 548 static kbd_term_t vkbd_term; 549 static kbd_intr_t vkbd_intr; 550 static kbd_test_if_t vkbd_test_if; 551 static kbd_enable_t vkbd_enable; 552 static kbd_disable_t vkbd_disable; 553 static kbd_read_t vkbd_read; 554 static kbd_check_t vkbd_check; 555 static kbd_read_char_t vkbd_read_char; 556 static kbd_check_char_t vkbd_check_char; 557 static kbd_ioctl_t vkbd_ioctl; 558 static kbd_lock_t vkbd_lock; 559 static void vkbd_clear_state_locked(vkbd_state_t *state); 560 static kbd_clear_state_t vkbd_clear_state; 561 static kbd_get_state_t vkbd_get_state; 562 static kbd_set_state_t vkbd_set_state; 563 static kbd_poll_mode_t vkbd_poll; 564 565 static keyboard_switch_t vkbdsw = { 566 .probe = vkbd_probe, 567 .init = vkbd_init, 568 .term = vkbd_term, 569 .intr = vkbd_intr, 570 .test_if = vkbd_test_if, 571 .enable = vkbd_enable, 572 .disable = vkbd_disable, 573 .read = vkbd_read, 574 .check = vkbd_check, 575 .read_char = vkbd_read_char, 576 .check_char = vkbd_check_char, 577 .ioctl = vkbd_ioctl, 578 .lock = vkbd_lock, 579 .clear_state = vkbd_clear_state, 580 .get_state = vkbd_get_state, 581 .set_state = vkbd_set_state, 582 .poll = vkbd_poll, 583 }; 584 585 static int typematic(int delay, int rate); 586 static int typematic_delay(int delay); 587 static int typematic_rate(int rate); 588 589 /* Return the number of found keyboards */ 590 static int 591 vkbd_configure(int flags) 592 { 593 return (1); 594 } 595 596 /* Detect a keyboard */ 597 static int 598 vkbd_probe(int unit, void *arg, int flags) 599 { 600 return (0); 601 } 602 603 /* Reset and initialize the keyboard (stolen from atkbd.c) */ 604 static int 605 vkbd_init(int unit, keyboard_t **kbdp, void *arg, int flags) 606 { 607 keyboard_t *kbd = NULL; 608 vkbd_state_t *state = NULL; 609 keymap_t *keymap = NULL; 610 accentmap_t *accmap = NULL; 611 fkeytab_t *fkeymap = NULL; 612 int fkeymap_size, delay[2]; 613 int error, needfree; 614 615 if (*kbdp == NULL) { 616 *kbdp = kbd = malloc(sizeof(*kbd), M_VKBD, M_NOWAIT | M_ZERO); 617 state = malloc(sizeof(*state), M_VKBD, M_NOWAIT | M_ZERO); 618 keymap = malloc(sizeof(key_map), M_VKBD, M_NOWAIT); 619 accmap = malloc(sizeof(accent_map), M_VKBD, M_NOWAIT); 620 fkeymap = malloc(sizeof(fkey_tab), M_VKBD, M_NOWAIT); 621 fkeymap_size = sizeof(fkey_tab)/sizeof(fkey_tab[0]); 622 needfree = 1; 623 if ((kbd == NULL) || (state == NULL) || (keymap == NULL) || 624 (accmap == NULL) || (fkeymap == NULL)) { 625 error = ENOMEM; 626 goto bad; 627 } 628 629 VKBD_LOCK_INIT(state); 630 state->ks_inq.head = state->ks_inq.tail = state->ks_inq.cc = 0; 631 TASK_INIT(&state->ks_task, 0, vkbd_dev_intr, (void *) kbd); 632 } else if (KBD_IS_INITIALIZED(*kbdp) && KBD_IS_CONFIGURED(*kbdp)) { 633 return (0); 634 } else { 635 kbd = *kbdp; 636 state = (vkbd_state_t *) kbd->kb_data; 637 keymap = kbd->kb_keymap; 638 accmap = kbd->kb_accentmap; 639 fkeymap = kbd->kb_fkeytab; 640 fkeymap_size = kbd->kb_fkeytab_size; 641 needfree = 0; 642 } 643 644 if (!KBD_IS_PROBED(kbd)) { 645 kbd_init_struct(kbd, KEYBOARD_NAME, KB_OTHER, unit, flags, 0, 0); 646 bcopy(&key_map, keymap, sizeof(key_map)); 647 bcopy(&accent_map, accmap, sizeof(accent_map)); 648 bcopy(fkey_tab, fkeymap, 649 imin(fkeymap_size*sizeof(fkeymap[0]), sizeof(fkey_tab))); 650 kbd_set_maps(kbd, keymap, accmap, fkeymap, fkeymap_size); 651 kbd->kb_data = (void *)state; 652 653 KBD_FOUND_DEVICE(kbd); 654 KBD_PROBE_DONE(kbd); 655 656 VKBD_LOCK(state); 657 vkbd_clear_state_locked(state); 658 state->ks_mode = K_XLATE; 659 /* FIXME: set the initial value for lock keys in ks_state */ 660 VKBD_UNLOCK(state); 661 } 662 if (!KBD_IS_INITIALIZED(kbd) && !(flags & KB_CONF_PROBE_ONLY)) { 663 kbd->kb_config = flags & ~KB_CONF_PROBE_ONLY; 664 665 vkbd_ioctl(kbd, KDSETLED, (caddr_t)&state->ks_state); 666 delay[0] = kbd->kb_delay1; 667 delay[1] = kbd->kb_delay2; 668 vkbd_ioctl(kbd, KDSETREPEAT, (caddr_t)delay); 669 670 KBD_INIT_DONE(kbd); 671 } 672 if (!KBD_IS_CONFIGURED(kbd)) { 673 if (kbd_register(kbd) < 0) { 674 error = ENXIO; 675 goto bad; 676 } 677 KBD_CONFIG_DONE(kbd); 678 } 679 680 return (0); 681 bad: 682 if (needfree) { 683 if (state != NULL) 684 free(state, M_VKBD); 685 if (keymap != NULL) 686 free(keymap, M_VKBD); 687 if (accmap != NULL) 688 free(accmap, M_VKBD); 689 if (fkeymap != NULL) 690 free(fkeymap, M_VKBD); 691 if (kbd != NULL) { 692 free(kbd, M_VKBD); 693 *kbdp = NULL; /* insure ref doesn't leak to caller */ 694 } 695 } 696 return (error); 697 } 698 699 /* Finish using this keyboard */ 700 static int 701 vkbd_term(keyboard_t *kbd) 702 { 703 vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data; 704 705 kbd_unregister(kbd); 706 707 VKBD_LOCK_DESTROY(state); 708 bzero(state, sizeof(*state)); 709 free(state, M_VKBD); 710 711 free(kbd->kb_keymap, M_VKBD); 712 free(kbd->kb_accentmap, M_VKBD); 713 free(kbd->kb_fkeytab, M_VKBD); 714 free(kbd, M_VKBD); 715 716 return (0); 717 } 718 719 /* Keyboard interrupt routine */ 720 static int 721 vkbd_intr(keyboard_t *kbd, void *arg) 722 { 723 int c; 724 725 if (KBD_IS_ACTIVE(kbd) && KBD_IS_BUSY(kbd)) { 726 /* let the callback function to process the input */ 727 (*kbd->kb_callback.kc_func)(kbd, KBDIO_KEYINPUT, 728 kbd->kb_callback.kc_arg); 729 } else { 730 /* read and discard the input; no one is waiting for input */ 731 do { 732 c = vkbd_read_char(kbd, FALSE); 733 } while (c != NOKEY); 734 } 735 736 return (0); 737 } 738 739 /* Test the interface to the device */ 740 static int 741 vkbd_test_if(keyboard_t *kbd) 742 { 743 return (0); 744 } 745 746 /* 747 * Enable the access to the device; until this function is called, 748 * the client cannot read from the keyboard. 749 */ 750 751 static int 752 vkbd_enable(keyboard_t *kbd) 753 { 754 KBD_ACTIVATE(kbd); 755 return (0); 756 } 757 758 /* Disallow the access to the device */ 759 static int 760 vkbd_disable(keyboard_t *kbd) 761 { 762 KBD_DEACTIVATE(kbd); 763 return (0); 764 } 765 766 /* Read one byte from the keyboard if it's allowed */ 767 static int 768 vkbd_read(keyboard_t *kbd, int wait) 769 { 770 vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data; 771 int c; 772 773 VKBD_LOCK(state); 774 c = vkbd_data_read(state, wait); 775 VKBD_UNLOCK(state); 776 777 if (c != -1) 778 kbd->kb_count ++; 779 780 return (KBD_IS_ACTIVE(kbd)? c : -1); 781 } 782 783 /* Check if data is waiting */ 784 static int 785 vkbd_check(keyboard_t *kbd) 786 { 787 vkbd_state_t *state = NULL; 788 int ready; 789 790 if (!KBD_IS_ACTIVE(kbd)) 791 return (FALSE); 792 793 state = (vkbd_state_t *) kbd->kb_data; 794 795 VKBD_LOCK(state); 796 ready = vkbd_data_ready(state); 797 VKBD_UNLOCK(state); 798 799 return (ready); 800 } 801 802 /* Read char from the keyboard (stolen from atkbd.c) */ 803 static u_int 804 vkbd_read_char(keyboard_t *kbd, int wait) 805 { 806 vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data; 807 u_int action; 808 int scancode, keycode; 809 810 VKBD_LOCK(state); 811 812 next_code: 813 814 /* do we have a composed char to return? */ 815 if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0)) { 816 action = state->ks_composed_char; 817 state->ks_composed_char = 0; 818 if (action > UCHAR_MAX) { 819 VKBD_UNLOCK(state); 820 return (ERRKEY); 821 } 822 823 VKBD_UNLOCK(state); 824 return (action); 825 } 826 827 /* see if there is something in the keyboard port */ 828 scancode = vkbd_data_read(state, wait); 829 if (scancode == -1) { 830 VKBD_UNLOCK(state); 831 return (NOKEY); 832 } 833 /* XXX FIXME: check for -1 if wait == 1! */ 834 835 kbd->kb_count ++; 836 837 /* return the byte as is for the K_RAW mode */ 838 if (state->ks_mode == K_RAW) { 839 VKBD_UNLOCK(state); 840 return (scancode); 841 } 842 843 /* translate the scan code into a keycode */ 844 keycode = scancode & 0x7F; 845 switch (state->ks_prefix) { 846 case 0x00: /* normal scancode */ 847 switch(scancode) { 848 case 0xB8: /* left alt (compose key) released */ 849 if (state->ks_flags & COMPOSE) { 850 state->ks_flags &= ~COMPOSE; 851 if (state->ks_composed_char > UCHAR_MAX) 852 state->ks_composed_char = 0; 853 } 854 break; 855 case 0x38: /* left alt (compose key) pressed */ 856 if (!(state->ks_flags & COMPOSE)) { 857 state->ks_flags |= COMPOSE; 858 state->ks_composed_char = 0; 859 } 860 break; 861 case 0xE0: 862 case 0xE1: 863 state->ks_prefix = scancode; 864 goto next_code; 865 } 866 break; 867 case 0xE0: /* 0xE0 prefix */ 868 state->ks_prefix = 0; 869 switch (keycode) { 870 case 0x1C: /* right enter key */ 871 keycode = 0x59; 872 break; 873 case 0x1D: /* right ctrl key */ 874 keycode = 0x5A; 875 break; 876 case 0x35: /* keypad divide key */ 877 keycode = 0x5B; 878 break; 879 case 0x37: /* print scrn key */ 880 keycode = 0x5C; 881 break; 882 case 0x38: /* right alt key (alt gr) */ 883 keycode = 0x5D; 884 break; 885 case 0x46: /* ctrl-pause/break on AT 101 (see below) */ 886 keycode = 0x68; 887 break; 888 case 0x47: /* grey home key */ 889 keycode = 0x5E; 890 break; 891 case 0x48: /* grey up arrow key */ 892 keycode = 0x5F; 893 break; 894 case 0x49: /* grey page up key */ 895 keycode = 0x60; 896 break; 897 case 0x4B: /* grey left arrow key */ 898 keycode = 0x61; 899 break; 900 case 0x4D: /* grey right arrow key */ 901 keycode = 0x62; 902 break; 903 case 0x4F: /* grey end key */ 904 keycode = 0x63; 905 break; 906 case 0x50: /* grey down arrow key */ 907 keycode = 0x64; 908 break; 909 case 0x51: /* grey page down key */ 910 keycode = 0x65; 911 break; 912 case 0x52: /* grey insert key */ 913 keycode = 0x66; 914 break; 915 case 0x53: /* grey delete key */ 916 keycode = 0x67; 917 break; 918 /* the following 3 are only used on the MS "Natural" keyboard */ 919 case 0x5b: /* left Window key */ 920 keycode = 0x69; 921 break; 922 case 0x5c: /* right Window key */ 923 keycode = 0x6a; 924 break; 925 case 0x5d: /* menu key */ 926 keycode = 0x6b; 927 break; 928 case 0x5e: /* power key */ 929 keycode = 0x6d; 930 break; 931 case 0x5f: /* sleep key */ 932 keycode = 0x6e; 933 break; 934 case 0x63: /* wake key */ 935 keycode = 0x6f; 936 break; 937 default: /* ignore everything else */ 938 goto next_code; 939 } 940 break; 941 case 0xE1: /* 0xE1 prefix */ 942 /* 943 * The pause/break key on the 101 keyboard produces: 944 * E1-1D-45 E1-9D-C5 945 * Ctrl-pause/break produces: 946 * E0-46 E0-C6 (See above.) 947 */ 948 state->ks_prefix = 0; 949 if (keycode == 0x1D) 950 state->ks_prefix = 0x1D; 951 goto next_code; 952 /* NOT REACHED */ 953 case 0x1D: /* pause / break */ 954 state->ks_prefix = 0; 955 if (keycode != 0x45) 956 goto next_code; 957 keycode = 0x68; 958 break; 959 } 960 961 if (kbd->kb_type == KB_84) { 962 switch (keycode) { 963 case 0x37: /* *(numpad)/print screen */ 964 if (state->ks_flags & SHIFTS) 965 keycode = 0x5c; /* print screen */ 966 break; 967 case 0x45: /* num lock/pause */ 968 if (state->ks_flags & CTLS) 969 keycode = 0x68; /* pause */ 970 break; 971 case 0x46: /* scroll lock/break */ 972 if (state->ks_flags & CTLS) 973 keycode = 0x6c; /* break */ 974 break; 975 } 976 } else if (kbd->kb_type == KB_101) { 977 switch (keycode) { 978 case 0x5c: /* print screen */ 979 if (state->ks_flags & ALTS) 980 keycode = 0x54; /* sysrq */ 981 break; 982 case 0x68: /* pause/break */ 983 if (state->ks_flags & CTLS) 984 keycode = 0x6c; /* break */ 985 break; 986 } 987 } 988 989 /* return the key code in the K_CODE mode */ 990 if (state->ks_mode == K_CODE) { 991 VKBD_UNLOCK(state); 992 return (keycode | (scancode & 0x80)); 993 } 994 995 /* compose a character code */ 996 if (state->ks_flags & COMPOSE) { 997 switch (keycode | (scancode & 0x80)) { 998 /* key pressed, process it */ 999 case 0x47: case 0x48: case 0x49: /* keypad 7,8,9 */ 1000 state->ks_composed_char *= 10; 1001 state->ks_composed_char += keycode - 0x40; 1002 if (state->ks_composed_char > UCHAR_MAX) { 1003 VKBD_UNLOCK(state); 1004 return (ERRKEY); 1005 } 1006 goto next_code; 1007 case 0x4B: case 0x4C: case 0x4D: /* keypad 4,5,6 */ 1008 state->ks_composed_char *= 10; 1009 state->ks_composed_char += keycode - 0x47; 1010 if (state->ks_composed_char > UCHAR_MAX) { 1011 VKBD_UNLOCK(state); 1012 return (ERRKEY); 1013 } 1014 goto next_code; 1015 case 0x4F: case 0x50: case 0x51: /* keypad 1,2,3 */ 1016 state->ks_composed_char *= 10; 1017 state->ks_composed_char += keycode - 0x4E; 1018 if (state->ks_composed_char > UCHAR_MAX) { 1019 VKBD_UNLOCK(state); 1020 return (ERRKEY); 1021 } 1022 goto next_code; 1023 case 0x52: /* keypad 0 */ 1024 state->ks_composed_char *= 10; 1025 if (state->ks_composed_char > UCHAR_MAX) { 1026 VKBD_UNLOCK(state); 1027 return (ERRKEY); 1028 } 1029 goto next_code; 1030 1031 /* key released, no interest here */ 1032 case 0xC7: case 0xC8: case 0xC9: /* keypad 7,8,9 */ 1033 case 0xCB: case 0xCC: case 0xCD: /* keypad 4,5,6 */ 1034 case 0xCF: case 0xD0: case 0xD1: /* keypad 1,2,3 */ 1035 case 0xD2: /* keypad 0 */ 1036 goto next_code; 1037 1038 case 0x38: /* left alt key */ 1039 break; 1040 1041 default: 1042 if (state->ks_composed_char > 0) { 1043 state->ks_flags &= ~COMPOSE; 1044 state->ks_composed_char = 0; 1045 VKBD_UNLOCK(state); 1046 return (ERRKEY); 1047 } 1048 break; 1049 } 1050 } 1051 1052 /* keycode to key action */ 1053 action = genkbd_keyaction(kbd, keycode, scancode & 0x80, 1054 &state->ks_state, &state->ks_accents); 1055 if (action == NOKEY) 1056 goto next_code; 1057 1058 VKBD_UNLOCK(state); 1059 1060 return (action); 1061 } 1062 1063 /* Check if char is waiting */ 1064 static int 1065 vkbd_check_char(keyboard_t *kbd) 1066 { 1067 vkbd_state_t *state = NULL; 1068 int ready; 1069 1070 if (!KBD_IS_ACTIVE(kbd)) 1071 return (FALSE); 1072 1073 state = (vkbd_state_t *) kbd->kb_data; 1074 1075 VKBD_LOCK(state); 1076 if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0)) 1077 ready = TRUE; 1078 else 1079 ready = vkbd_data_ready(state); 1080 VKBD_UNLOCK(state); 1081 1082 return (ready); 1083 } 1084 1085 /* Some useful control functions (stolen from atkbd.c) */ 1086 static int 1087 vkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg) 1088 { 1089 vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data; 1090 int i; 1091 #ifdef COMPAT_FREEBSD6 1092 int ival; 1093 #endif 1094 1095 VKBD_LOCK(state); 1096 1097 switch (cmd) { 1098 case KDGKBMODE: /* get keyboard mode */ 1099 *(int *)arg = state->ks_mode; 1100 break; 1101 1102 #ifdef COMPAT_FREEBSD6 1103 case _IO('K', 7): 1104 ival = IOCPARM_IVAL(arg); 1105 arg = (caddr_t)&ival; 1106 /* FALLTHROUGH */ 1107 #endif 1108 case KDSKBMODE: /* set keyboard mode */ 1109 switch (*(int *)arg) { 1110 case K_XLATE: 1111 if (state->ks_mode != K_XLATE) { 1112 /* make lock key state and LED state match */ 1113 state->ks_state &= ~LOCK_MASK; 1114 state->ks_state |= KBD_LED_VAL(kbd); 1115 vkbd_status_changed(state); 1116 } 1117 /* FALLTHROUGH */ 1118 1119 case K_RAW: 1120 case K_CODE: 1121 if (state->ks_mode != *(int *)arg) { 1122 vkbd_clear_state_locked(state); 1123 state->ks_mode = *(int *)arg; 1124 vkbd_status_changed(state); 1125 } 1126 break; 1127 1128 default: 1129 VKBD_UNLOCK(state); 1130 return (EINVAL); 1131 } 1132 break; 1133 1134 case KDGETLED: /* get keyboard LED */ 1135 *(int *)arg = KBD_LED_VAL(kbd); 1136 break; 1137 1138 #ifdef COMPAT_FREEBSD6 1139 case _IO('K', 66): 1140 ival = IOCPARM_IVAL(arg); 1141 arg = (caddr_t)&ival; 1142 /* FALLTHROUGH */ 1143 #endif 1144 case KDSETLED: /* set keyboard LED */ 1145 /* NOTE: lock key state in ks_state won't be changed */ 1146 if (*(int *)arg & ~LOCK_MASK) { 1147 VKBD_UNLOCK(state); 1148 return (EINVAL); 1149 } 1150 1151 i = *(int *)arg; 1152 /* replace CAPS LED with ALTGR LED for ALTGR keyboards */ 1153 if (state->ks_mode == K_XLATE && 1154 kbd->kb_keymap->n_keys > ALTGR_OFFSET) { 1155 if (i & ALKED) 1156 i |= CLKED; 1157 else 1158 i &= ~CLKED; 1159 } 1160 1161 KBD_LED_VAL(kbd) = *(int *)arg; 1162 vkbd_status_changed(state); 1163 break; 1164 1165 case KDGKBSTATE: /* get lock key state */ 1166 *(int *)arg = state->ks_state & LOCK_MASK; 1167 break; 1168 1169 #ifdef COMPAT_FREEBSD6 1170 case _IO('K', 20): 1171 ival = IOCPARM_IVAL(arg); 1172 arg = (caddr_t)&ival; 1173 /* FALLTHROUGH */ 1174 #endif 1175 case KDSKBSTATE: /* set lock key state */ 1176 if (*(int *)arg & ~LOCK_MASK) { 1177 VKBD_UNLOCK(state); 1178 return (EINVAL); 1179 } 1180 state->ks_state &= ~LOCK_MASK; 1181 state->ks_state |= *(int *)arg; 1182 vkbd_status_changed(state); 1183 VKBD_UNLOCK(state); 1184 /* set LEDs and quit */ 1185 return (vkbd_ioctl(kbd, KDSETLED, arg)); 1186 1187 case KDSETREPEAT: /* set keyboard repeat rate (new interface) */ 1188 i = typematic(((int *)arg)[0], ((int *)arg)[1]); 1189 kbd->kb_delay1 = typematic_delay(i); 1190 kbd->kb_delay2 = typematic_rate(i); 1191 vkbd_status_changed(state); 1192 break; 1193 1194 #ifdef COMPAT_FREEBSD6 1195 case _IO('K', 67): 1196 ival = IOCPARM_IVAL(arg); 1197 arg = (caddr_t)&ival; 1198 /* FALLTHROUGH */ 1199 #endif 1200 case KDSETRAD: /* set keyboard repeat rate (old interface) */ 1201 kbd->kb_delay1 = typematic_delay(*(int *)arg); 1202 kbd->kb_delay2 = typematic_rate(*(int *)arg); 1203 vkbd_status_changed(state); 1204 break; 1205 1206 case PIO_KEYMAP: /* set keyboard translation table */ 1207 case OPIO_KEYMAP: /* set keyboard translation table (compat) */ 1208 case PIO_KEYMAPENT: /* set keyboard translation table entry */ 1209 case PIO_DEADKEYMAP: /* set accent key translation table */ 1210 state->ks_accents = 0; 1211 /* FALLTHROUGH */ 1212 1213 default: 1214 VKBD_UNLOCK(state); 1215 return (genkbd_commonioctl(kbd, cmd, arg)); 1216 } 1217 1218 VKBD_UNLOCK(state); 1219 1220 return (0); 1221 } 1222 1223 /* Lock the access to the keyboard */ 1224 static int 1225 vkbd_lock(keyboard_t *kbd, int lock) 1226 { 1227 return (1); /* XXX */ 1228 } 1229 1230 /* Clear the internal state of the keyboard */ 1231 static void 1232 vkbd_clear_state_locked(vkbd_state_t *state) 1233 { 1234 VKBD_LOCK_ASSERT(state, MA_OWNED); 1235 1236 state->ks_flags &= ~COMPOSE; 1237 state->ks_polling = 0; 1238 state->ks_state &= LOCK_MASK; /* preserve locking key state */ 1239 state->ks_accents = 0; 1240 state->ks_composed_char = 0; 1241 /* state->ks_prefix = 0; XXX */ 1242 1243 /* flush ks_inq and wakeup writers/poll()ers */ 1244 state->ks_inq.head = state->ks_inq.tail = state->ks_inq.cc = 0; 1245 selwakeuppri(&state->ks_wsel, PZERO + 1); 1246 wakeup(&state->ks_inq); 1247 } 1248 1249 static void 1250 vkbd_clear_state(keyboard_t *kbd) 1251 { 1252 vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data; 1253 1254 VKBD_LOCK(state); 1255 vkbd_clear_state_locked(state); 1256 VKBD_UNLOCK(state); 1257 } 1258 1259 /* Save the internal state */ 1260 static int 1261 vkbd_get_state(keyboard_t *kbd, void *buf, size_t len) 1262 { 1263 if (len == 0) 1264 return (sizeof(vkbd_state_t)); 1265 if (len < sizeof(vkbd_state_t)) 1266 return (-1); 1267 bcopy(kbd->kb_data, buf, sizeof(vkbd_state_t)); /* XXX locking? */ 1268 return (0); 1269 } 1270 1271 /* Set the internal state */ 1272 static int 1273 vkbd_set_state(keyboard_t *kbd, void *buf, size_t len) 1274 { 1275 if (len < sizeof(vkbd_state_t)) 1276 return (ENOMEM); 1277 bcopy(buf, kbd->kb_data, sizeof(vkbd_state_t)); /* XXX locking? */ 1278 return (0); 1279 } 1280 1281 /* Set polling */ 1282 static int 1283 vkbd_poll(keyboard_t *kbd, int on) 1284 { 1285 vkbd_state_t *state = NULL; 1286 1287 state = (vkbd_state_t *) kbd->kb_data; 1288 1289 VKBD_LOCK(state); 1290 1291 if (on) 1292 state->ks_polling ++; 1293 else 1294 state->ks_polling --; 1295 1296 VKBD_UNLOCK(state); 1297 1298 return (0); 1299 } 1300 1301 /* 1302 * Local functions 1303 */ 1304 1305 static int delays[] = { 250, 500, 750, 1000 }; 1306 static int rates[] = { 34, 38, 42, 46, 50, 55, 59, 63, 1307 68, 76, 84, 92, 100, 110, 118, 126, 1308 136, 152, 168, 184, 200, 220, 236, 252, 1309 272, 304, 336, 368, 400, 440, 472, 504 }; 1310 1311 static int 1312 typematic_delay(int i) 1313 { 1314 return (delays[(i >> 5) & 3]); 1315 } 1316 1317 static int 1318 typematic_rate(int i) 1319 { 1320 return (rates[i & 0x1f]); 1321 } 1322 1323 static int 1324 typematic(int delay, int rate) 1325 { 1326 int value; 1327 int i; 1328 1329 for (i = nitems(delays) - 1; i > 0; i --) { 1330 if (delay >= delays[i]) 1331 break; 1332 } 1333 value = i << 5; 1334 for (i = nitems(rates) - 1; i > 0; i --) { 1335 if (rate >= rates[i]) 1336 break; 1337 } 1338 value |= i; 1339 return (value); 1340 } 1341 1342 /***************************************************************************** 1343 ***************************************************************************** 1344 ** Module 1345 ***************************************************************************** 1346 *****************************************************************************/ 1347 1348 KEYBOARD_DRIVER(vkbd, vkbdsw, vkbd_configure); 1349 1350 static int 1351 vkbd_modevent(module_t mod, int type, void *data) 1352 { 1353 static eventhandler_tag tag; 1354 1355 switch (type) { 1356 case MOD_LOAD: 1357 clone_setup(&vkbd_dev_clones); 1358 tag = EVENTHANDLER_REGISTER(dev_clone, vkbd_dev_clone, 0, 1000); 1359 if (tag == NULL) { 1360 clone_cleanup(&vkbd_dev_clones); 1361 return (ENOMEM); 1362 } 1363 kbd_add_driver(&vkbd_kbd_driver); 1364 break; 1365 1366 case MOD_UNLOAD: 1367 kbd_delete_driver(&vkbd_kbd_driver); 1368 EVENTHANDLER_DEREGISTER(dev_clone, tag); 1369 clone_cleanup(&vkbd_dev_clones); 1370 break; 1371 1372 default: 1373 return (EOPNOTSUPP); 1374 } 1375 1376 return (0); 1377 } 1378 1379 DEV_MODULE(vkbd, vkbd_modevent, NULL);
Cache object: 1c6d912dddfd6a118c4b08818857d561
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