Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/gpio/gpiokeys.c
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1 /*- 2 * Copyright (c) 2015-2016 Oleksandr Tymoshenko <gonzo@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_platform.h" 31 #include "opt_kbd.h" 32 #include "opt_evdev.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/gpio.h> 38 #include <sys/kernel.h> 39 #include <sys/lock.h> 40 #include <sys/malloc.h> 41 #include <sys/module.h> 42 #include <sys/mutex.h> 43 #include <sys/proc.h> 44 #include <sys/kdb.h> 45 46 #include <sys/ioccom.h> 47 #include <sys/filio.h> 48 #include <sys/kbio.h> 49 50 #include <dev/kbd/kbdreg.h> 51 #include <dev/kbd/kbdtables.h> 52 53 #include <dev/fdt/fdt_common.h> 54 #include <dev/ofw/ofw_bus.h> 55 #include <dev/ofw/ofw_bus_subr.h> 56 57 #include <dev/gpio/gpiobusvar.h> 58 #include <dev/gpio/gpiokeys.h> 59 60 #ifdef EVDEV_SUPPORT 61 #include <dev/evdev/evdev.h> 62 #include <dev/evdev/input.h> 63 #endif 64 65 #define KBD_DRIVER_NAME "gpiokeys" 66 67 #define GPIOKEYS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 68 #define GPIOKEYS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 69 #define GPIOKEYS_LOCK_INIT(_sc) \ 70 mtx_init(&_sc->sc_mtx, device_get_nameunit((_sc)->sc_dev), \ 71 "gpiokeys", MTX_DEF) 72 #define GPIOKEYS_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->sc_mtx); 73 #define GPIOKEYS_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->sc_mtx, MA_OWNED) 74 75 #define GPIOKEY_LOCK(_key) mtx_lock(&(_key)->mtx) 76 #define GPIOKEY_UNLOCK(_key) mtx_unlock(&(_key)->mtx) 77 #define GPIOKEY_LOCK_INIT(_key) \ 78 mtx_init(&(_key)->mtx, "gpiokey", "gpiokey", MTX_DEF) 79 #define GPIOKEY_LOCK_DESTROY(_key) mtx_destroy(&(_key)->mtx); 80 81 #define KEY_PRESS 0 82 #define KEY_RELEASE 0x80 83 84 #define SCAN_PRESS 0 85 #define SCAN_RELEASE 0x80 86 #define SCAN_CHAR(c) ((c) & 0x7f) 87 88 #define GPIOKEYS_GLOBAL_NMOD 8 /* units */ 89 #define GPIOKEYS_GLOBAL_NKEYCODE 6 /* units */ 90 #define GPIOKEYS_GLOBAL_IN_BUF_SIZE (2*(GPIOKEYS_GLOBAL_NMOD + (2*GPIOKEYS_GLOBAL_NKEYCODE))) /* bytes */ 91 #define GPIOKEYS_GLOBAL_IN_BUF_FULL (GPIOKEYS_GLOBAL_IN_BUF_SIZE / 2) /* bytes */ 92 #define GPIOKEYS_GLOBAL_NFKEY (sizeof(fkey_tab)/sizeof(fkey_tab[0])) /* units */ 93 #define GPIOKEYS_GLOBAL_BUFFER_SIZE 64 /* bytes */ 94 95 #define AUTOREPEAT_DELAY 250 96 #define AUTOREPEAT_REPEAT 34 97 98 struct gpiokeys_softc; 99 100 struct gpiokey 101 { 102 struct gpiokeys_softc *parent_sc; 103 gpio_pin_t pin; 104 int irq_rid; 105 struct resource *irq_res; 106 void *intr_hl; 107 struct mtx mtx; 108 #ifdef EVDEV_SUPPORT 109 uint32_t evcode; 110 #endif 111 uint32_t keycode; 112 int autorepeat; 113 struct callout debounce_callout; 114 struct callout repeat_callout; 115 int repeat_delay; 116 int repeat; 117 int debounce_interval; 118 }; 119 120 struct gpiokeys_softc 121 { 122 device_t sc_dev; 123 struct mtx sc_mtx; 124 struct gpiokey *sc_keys; 125 int sc_total_keys; 126 127 #ifdef EVDEV_SUPPORT 128 struct evdev_dev *sc_evdev; 129 #endif 130 keyboard_t sc_kbd; 131 keymap_t sc_keymap; 132 accentmap_t sc_accmap; 133 fkeytab_t sc_fkeymap[GPIOKEYS_GLOBAL_NFKEY]; 134 135 uint32_t sc_input[GPIOKEYS_GLOBAL_IN_BUF_SIZE]; /* input buffer */ 136 uint32_t sc_time_ms; 137 #define GPIOKEYS_GLOBAL_FLAG_POLLING 0x00000002 138 139 uint32_t sc_flags; /* flags */ 140 141 int sc_mode; /* input mode (K_XLATE,K_RAW,K_CODE) */ 142 int sc_state; /* shift/lock key state */ 143 int sc_accents; /* accent key index (> 0) */ 144 int sc_kbd_size; 145 146 uint16_t sc_inputs; 147 uint16_t sc_inputhead; 148 uint16_t sc_inputtail; 149 150 uint8_t sc_kbd_id; 151 }; 152 153 /* gpio-keys device */ 154 static int gpiokeys_probe(device_t); 155 static int gpiokeys_attach(device_t); 156 static int gpiokeys_detach(device_t); 157 158 /* kbd methods prototypes */ 159 static int gpiokeys_set_typematic(keyboard_t *, int); 160 static uint32_t gpiokeys_read_char(keyboard_t *, int); 161 static void gpiokeys_clear_state(keyboard_t *); 162 static int gpiokeys_ioctl(keyboard_t *, u_long, caddr_t); 163 static int gpiokeys_enable(keyboard_t *); 164 static int gpiokeys_disable(keyboard_t *); 165 static void gpiokeys_event_keyinput(struct gpiokeys_softc *); 166 167 static void 168 gpiokeys_put_key(struct gpiokeys_softc *sc, uint32_t key) 169 { 170 171 GPIOKEYS_ASSERT_LOCKED(sc); 172 173 if (sc->sc_inputs < GPIOKEYS_GLOBAL_IN_BUF_SIZE) { 174 sc->sc_input[sc->sc_inputtail] = key; 175 ++(sc->sc_inputs); 176 ++(sc->sc_inputtail); 177 if (sc->sc_inputtail >= GPIOKEYS_GLOBAL_IN_BUF_SIZE) { 178 sc->sc_inputtail = 0; 179 } 180 } else { 181 device_printf(sc->sc_dev, "input buffer is full\n"); 182 } 183 } 184 185 static void 186 gpiokeys_key_event(struct gpiokeys_softc *sc, struct gpiokey *key, int pressed) 187 { 188 uint32_t code; 189 190 GPIOKEYS_LOCK(sc); 191 #ifdef EVDEV_SUPPORT 192 if (key->evcode != GPIOKEY_NONE && 193 (evdev_rcpt_mask & EVDEV_RCPT_HW_KBD) != 0) { 194 evdev_push_key(sc->sc_evdev, key->evcode, pressed); 195 evdev_sync(sc->sc_evdev); 196 } 197 if (evdev_is_grabbed(sc->sc_evdev)) { 198 GPIOKEYS_UNLOCK(sc); 199 return; 200 } 201 #endif 202 if (key->keycode != GPIOKEY_NONE) { 203 code = key->keycode & SCAN_KEYCODE_MASK; 204 if (!pressed) 205 code |= KEY_RELEASE; 206 207 if (key->keycode & SCAN_PREFIX_E0) 208 gpiokeys_put_key(sc, 0xe0); 209 else if (key->keycode & SCAN_PREFIX_E1) 210 gpiokeys_put_key(sc, 0xe1); 211 212 gpiokeys_put_key(sc, code); 213 } 214 GPIOKEYS_UNLOCK(sc); 215 216 if (key->keycode != GPIOKEY_NONE) 217 gpiokeys_event_keyinput(sc); 218 } 219 220 static void 221 gpiokey_autorepeat(void *arg) 222 { 223 struct gpiokey *key; 224 225 key = arg; 226 227 gpiokeys_key_event(key->parent_sc, key, 1); 228 229 callout_reset(&key->repeat_callout, key->repeat, 230 gpiokey_autorepeat, key); 231 } 232 233 static void 234 gpiokey_debounced_intr(void *arg) 235 { 236 struct gpiokey *key; 237 bool active; 238 239 key = arg; 240 241 gpio_pin_is_active(key->pin, &active); 242 if (active) { 243 gpiokeys_key_event(key->parent_sc, key, 1); 244 if (key->autorepeat) { 245 callout_reset(&key->repeat_callout, key->repeat_delay, 246 gpiokey_autorepeat, key); 247 } 248 } 249 else { 250 if (key->autorepeat && 251 callout_pending(&key->repeat_callout)) 252 callout_stop(&key->repeat_callout); 253 gpiokeys_key_event(key->parent_sc, key, 0); 254 } 255 } 256 257 static void 258 gpiokey_intr(void *arg) 259 { 260 struct gpiokey *key; 261 int debounce_ticks; 262 263 key = arg; 264 265 GPIOKEY_LOCK(key); 266 debounce_ticks = (hz * key->debounce_interval) / 1000; 267 if (debounce_ticks == 0) 268 debounce_ticks = 1; 269 if (!callout_pending(&key->debounce_callout)) 270 callout_reset(&key->debounce_callout, debounce_ticks, 271 gpiokey_debounced_intr, key); 272 GPIOKEY_UNLOCK(key); 273 } 274 275 static void 276 gpiokeys_attach_key(struct gpiokeys_softc *sc, phandle_t node, 277 struct gpiokey *key) 278 { 279 pcell_t prop; 280 char *name; 281 uint32_t code; 282 int err; 283 const char *key_name; 284 285 GPIOKEY_LOCK_INIT(key); 286 key->parent_sc = sc; 287 callout_init_mtx(&key->debounce_callout, &key->mtx, 0); 288 callout_init_mtx(&key->repeat_callout, &key->mtx, 0); 289 290 name = NULL; 291 if (OF_getprop_alloc(node, "label", (void **)&name) == -1) 292 OF_getprop_alloc(node, "name", (void **)&name); 293 294 if (name != NULL) 295 key_name = name; 296 else 297 key_name = "unknown"; 298 299 key->autorepeat = OF_hasprop(node, "autorepeat"); 300 301 key->repeat_delay = (hz * AUTOREPEAT_DELAY) / 1000; 302 if (key->repeat_delay == 0) 303 key->repeat_delay = 1; 304 305 key->repeat = (hz * AUTOREPEAT_REPEAT) / 1000; 306 if (key->repeat == 0) 307 key->repeat = 1; 308 309 if ((OF_getprop(node, "debounce-interval", &prop, sizeof(prop))) > 0) 310 key->debounce_interval = fdt32_to_cpu(prop); 311 else 312 key->debounce_interval = 5; 313 314 if ((OF_getprop(node, "freebsd,code", &prop, sizeof(prop))) > 0) 315 key->keycode = fdt32_to_cpu(prop); 316 else if ((OF_getprop(node, "linux,code", &prop, sizeof(prop))) > 0) { 317 code = fdt32_to_cpu(prop); 318 key->keycode = gpiokey_map_linux_code(code); 319 if (key->keycode == GPIOKEY_NONE) 320 device_printf(sc->sc_dev, "<%s> failed to map linux,code value 0x%x\n", 321 key_name, code); 322 #ifdef EVDEV_SUPPORT 323 key->evcode = code; 324 evdev_support_key(sc->sc_evdev, code); 325 #endif 326 } 327 else 328 device_printf(sc->sc_dev, "<%s> no linux,code or freebsd,code property\n", 329 key_name); 330 331 err = gpio_pin_get_by_ofw_idx(sc->sc_dev, node, 0, &key->pin); 332 if (err) { 333 device_printf(sc->sc_dev, "<%s> failed to map pin\n", key_name); 334 if (name) 335 OF_prop_free(name); 336 return; 337 } 338 339 key->irq_res = gpio_alloc_intr_resource(sc->sc_dev, &key->irq_rid, 340 RF_ACTIVE, key->pin, GPIO_INTR_EDGE_BOTH); 341 if (!key->irq_res) { 342 device_printf(sc->sc_dev, "<%s> cannot allocate interrupt\n", key_name); 343 gpio_pin_release(key->pin); 344 key->pin = NULL; 345 if (name) 346 OF_prop_free(name); 347 return; 348 } 349 350 if (bus_setup_intr(sc->sc_dev, key->irq_res, INTR_TYPE_MISC | INTR_MPSAFE, 351 NULL, gpiokey_intr, key, 352 &key->intr_hl) != 0) { 353 device_printf(sc->sc_dev, "<%s> unable to setup the irq handler\n", key_name); 354 bus_release_resource(sc->sc_dev, SYS_RES_IRQ, key->irq_rid, 355 key->irq_res); 356 gpio_pin_release(key->pin); 357 key->pin = NULL; 358 key->irq_res = NULL; 359 if (name) 360 OF_prop_free(name); 361 return; 362 } 363 364 if (bootverbose) 365 device_printf(sc->sc_dev, "<%s> code=%08x, autorepeat=%d, "\ 366 "repeat=%d, repeat_delay=%d\n", key_name, key->keycode, 367 key->autorepeat, key->repeat, key->repeat_delay); 368 369 if (name) 370 OF_prop_free(name); 371 } 372 373 static void 374 gpiokeys_detach_key(struct gpiokeys_softc *sc, struct gpiokey *key) 375 { 376 377 GPIOKEY_LOCK(key); 378 if (key->intr_hl) 379 bus_teardown_intr(sc->sc_dev, key->irq_res, key->intr_hl); 380 if (key->irq_res) 381 bus_release_resource(sc->sc_dev, SYS_RES_IRQ, 382 key->irq_rid, key->irq_res); 383 if (callout_pending(&key->repeat_callout)) 384 callout_drain(&key->repeat_callout); 385 if (callout_pending(&key->debounce_callout)) 386 callout_drain(&key->debounce_callout); 387 if (key->pin) 388 gpio_pin_release(key->pin); 389 GPIOKEY_UNLOCK(key); 390 GPIOKEY_LOCK_DESTROY(key); 391 } 392 393 static int 394 gpiokeys_probe(device_t dev) 395 { 396 if (!ofw_bus_is_compatible(dev, "gpio-keys")) 397 return (ENXIO); 398 399 device_set_desc(dev, "GPIO keyboard"); 400 401 return (0); 402 } 403 404 static int 405 gpiokeys_attach(device_t dev) 406 { 407 struct gpiokeys_softc *sc; 408 keyboard_t *kbd; 409 #ifdef EVDEV_SUPPORT 410 char *name; 411 #endif 412 phandle_t keys, child; 413 int total_keys; 414 int unit; 415 416 if ((keys = ofw_bus_get_node(dev)) == -1) 417 return (ENXIO); 418 419 sc = device_get_softc(dev); 420 sc->sc_dev = dev; 421 kbd = &sc->sc_kbd; 422 423 GPIOKEYS_LOCK_INIT(sc); 424 unit = device_get_unit(dev); 425 kbd_init_struct(kbd, KBD_DRIVER_NAME, KB_OTHER, unit, 0, 0, 0); 426 427 kbd->kb_data = (void *)sc; 428 sc->sc_mode = K_XLATE; 429 430 sc->sc_keymap = key_map; 431 sc->sc_accmap = accent_map; 432 433 kbd_set_maps(kbd, &sc->sc_keymap, &sc->sc_accmap, 434 sc->sc_fkeymap, GPIOKEYS_GLOBAL_NFKEY); 435 436 KBD_FOUND_DEVICE(kbd); 437 438 gpiokeys_clear_state(kbd); 439 440 KBD_PROBE_DONE(kbd); 441 442 KBD_INIT_DONE(kbd); 443 444 if (kbd_register(kbd) < 0) { 445 goto detach; 446 } 447 448 KBD_CONFIG_DONE(kbd); 449 450 gpiokeys_enable(kbd); 451 452 #ifdef KBD_INSTALL_CDEV 453 if (kbd_attach(kbd)) { 454 goto detach; 455 } 456 #endif 457 458 if (bootverbose) { 459 kbdd_diag(kbd, 1); 460 } 461 462 #ifdef EVDEV_SUPPORT 463 sc->sc_evdev = evdev_alloc(); 464 evdev_set_name(sc->sc_evdev, device_get_desc(dev)); 465 466 OF_getprop_alloc(keys, "name", (void **)&name); 467 evdev_set_phys(sc->sc_evdev, name != NULL ? name : "unknown"); 468 OF_prop_free(name); 469 470 evdev_set_id(sc->sc_evdev, BUS_VIRTUAL, 0, 0, 0); 471 evdev_support_event(sc->sc_evdev, EV_SYN); 472 evdev_support_event(sc->sc_evdev, EV_KEY); 473 #endif 474 475 total_keys = 0; 476 477 /* Traverse the 'gpio-keys' node and count keys */ 478 for (child = OF_child(keys); child != 0; child = OF_peer(child)) { 479 if (!OF_hasprop(child, "gpios")) 480 continue; 481 total_keys++; 482 } 483 484 if (total_keys) { 485 sc->sc_keys = malloc(sizeof(struct gpiokey) * total_keys, 486 M_DEVBUF, M_WAITOK | M_ZERO); 487 488 sc->sc_total_keys = 0; 489 /* Traverse the 'gpio-keys' node and count keys */ 490 for (child = OF_child(keys); child != 0; child = OF_peer(child)) { 491 if (!OF_hasprop(child, "gpios")) 492 continue; 493 gpiokeys_attach_key(sc, child ,&sc->sc_keys[sc->sc_total_keys]); 494 sc->sc_total_keys++; 495 } 496 } 497 498 #ifdef EVDEV_SUPPORT 499 if (evdev_register_mtx(sc->sc_evdev, &sc->sc_mtx) != 0) { 500 device_printf(dev, "failed to register evdev device\n"); 501 goto detach; 502 } 503 #endif 504 505 return (0); 506 507 detach: 508 gpiokeys_detach(dev); 509 return (ENXIO); 510 } 511 512 static int 513 gpiokeys_detach(device_t dev) 514 { 515 struct gpiokeys_softc *sc; 516 keyboard_t *kbd; 517 int i; 518 519 sc = device_get_softc(dev); 520 521 for (i = 0; i < sc->sc_total_keys; i++) 522 gpiokeys_detach_key(sc, &sc->sc_keys[i]); 523 524 kbd = kbd_get_keyboard(kbd_find_keyboard(KBD_DRIVER_NAME, 525 device_get_unit(dev))); 526 527 #ifdef KBD_INSTALL_CDEV 528 kbd_detach(kbd); 529 #endif 530 kbd_unregister(kbd); 531 532 #ifdef EVDEV_SUPPORT 533 evdev_free(sc->sc_evdev); 534 #endif 535 536 GPIOKEYS_LOCK_DESTROY(sc); 537 if (sc->sc_keys) 538 free(sc->sc_keys, M_DEVBUF); 539 540 return (0); 541 } 542 543 /* early keyboard probe, not supported */ 544 static int 545 gpiokeys_configure(int flags) 546 { 547 return (0); 548 } 549 550 /* detect a keyboard, not used */ 551 static int 552 gpiokeys__probe(int unit, void *arg, int flags) 553 { 554 return (ENXIO); 555 } 556 557 /* reset and initialize the device, not used */ 558 static int 559 gpiokeys_init(int unit, keyboard_t **kbdp, void *arg, int flags) 560 { 561 return (ENXIO); 562 } 563 564 /* test the interface to the device, not used */ 565 static int 566 gpiokeys_test_if(keyboard_t *kbd) 567 { 568 return (0); 569 } 570 571 /* finish using this keyboard, not used */ 572 static int 573 gpiokeys_term(keyboard_t *kbd) 574 { 575 return (ENXIO); 576 } 577 578 /* keyboard interrupt routine, not used */ 579 static int 580 gpiokeys_intr(keyboard_t *kbd, void *arg) 581 { 582 return (0); 583 } 584 585 /* lock the access to the keyboard, not used */ 586 static int 587 gpiokeys_lock(keyboard_t *kbd, int lock) 588 { 589 return (1); 590 } 591 592 /* 593 * Enable the access to the device; until this function is called, 594 * the client cannot read from the keyboard. 595 */ 596 static int 597 gpiokeys_enable(keyboard_t *kbd) 598 { 599 struct gpiokeys_softc *sc; 600 601 sc = kbd->kb_data; 602 GPIOKEYS_LOCK(sc); 603 KBD_ACTIVATE(kbd); 604 GPIOKEYS_UNLOCK(sc); 605 606 return (0); 607 } 608 609 /* disallow the access to the device */ 610 static int 611 gpiokeys_disable(keyboard_t *kbd) 612 { 613 struct gpiokeys_softc *sc; 614 615 sc = kbd->kb_data; 616 GPIOKEYS_LOCK(sc); 617 KBD_DEACTIVATE(kbd); 618 GPIOKEYS_UNLOCK(sc); 619 620 return (0); 621 } 622 623 static void 624 gpiokeys_do_poll(struct gpiokeys_softc *sc, uint8_t wait) 625 { 626 627 KASSERT((sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) != 0, 628 ("gpiokeys_do_poll called when not polling\n")); 629 630 GPIOKEYS_ASSERT_LOCKED(sc); 631 632 if (!kdb_active && !SCHEDULER_STOPPED()) { 633 while (sc->sc_inputs == 0) { 634 kern_yield(PRI_UNCHANGED); 635 if (!wait) 636 break; 637 } 638 return; 639 } 640 641 while ((sc->sc_inputs == 0) && wait) { 642 printf("POLL!\n"); 643 } 644 } 645 646 /* check if data is waiting */ 647 static int 648 gpiokeys_check(keyboard_t *kbd) 649 { 650 struct gpiokeys_softc *sc = kbd->kb_data; 651 652 GPIOKEYS_ASSERT_LOCKED(sc); 653 654 if (!KBD_IS_ACTIVE(kbd)) 655 return (0); 656 657 if (sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) 658 gpiokeys_do_poll(sc, 0); 659 660 if (sc->sc_inputs > 0) { 661 return (1); 662 } 663 return (0); 664 } 665 666 /* check if char is waiting */ 667 static int 668 gpiokeys_check_char_locked(keyboard_t *kbd) 669 { 670 if (!KBD_IS_ACTIVE(kbd)) 671 return (0); 672 673 return (gpiokeys_check(kbd)); 674 } 675 676 static int 677 gpiokeys_check_char(keyboard_t *kbd) 678 { 679 int result; 680 struct gpiokeys_softc *sc = kbd->kb_data; 681 682 GPIOKEYS_LOCK(sc); 683 result = gpiokeys_check_char_locked(kbd); 684 GPIOKEYS_UNLOCK(sc); 685 686 return (result); 687 } 688 689 static int32_t 690 gpiokeys_get_key(struct gpiokeys_softc *sc, uint8_t wait) 691 { 692 int32_t c; 693 694 KASSERT((!kdb_active && !SCHEDULER_STOPPED()) 695 || (sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) != 0, 696 ("not polling in kdb or panic\n")); 697 698 GPIOKEYS_ASSERT_LOCKED(sc); 699 700 if (sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) 701 gpiokeys_do_poll(sc, wait); 702 703 if (sc->sc_inputs == 0) { 704 c = -1; 705 } else { 706 c = sc->sc_input[sc->sc_inputhead]; 707 --(sc->sc_inputs); 708 ++(sc->sc_inputhead); 709 if (sc->sc_inputhead >= GPIOKEYS_GLOBAL_IN_BUF_SIZE) { 710 sc->sc_inputhead = 0; 711 } 712 } 713 714 return (c); 715 } 716 717 /* read one byte from the keyboard if it's allowed */ 718 static int 719 gpiokeys_read(keyboard_t *kbd, int wait) 720 { 721 struct gpiokeys_softc *sc = kbd->kb_data; 722 int32_t keycode; 723 724 if (!KBD_IS_ACTIVE(kbd)) 725 return (-1); 726 727 /* XXX */ 728 keycode = gpiokeys_get_key(sc, (wait == FALSE) ? 0 : 1); 729 if (!KBD_IS_ACTIVE(kbd) || (keycode == -1)) 730 return (-1); 731 732 ++(kbd->kb_count); 733 734 return (keycode); 735 } 736 737 /* read char from the keyboard */ 738 static uint32_t 739 gpiokeys_read_char_locked(keyboard_t *kbd, int wait) 740 { 741 struct gpiokeys_softc *sc = kbd->kb_data; 742 uint32_t action; 743 uint32_t keycode; 744 745 if (!KBD_IS_ACTIVE(kbd)) 746 return (NOKEY); 747 748 next_code: 749 750 /* see if there is something in the keyboard port */ 751 /* XXX */ 752 keycode = gpiokeys_get_key(sc, (wait == FALSE) ? 0 : 1); 753 ++kbd->kb_count; 754 755 /* return the byte as is for the K_RAW mode */ 756 if (sc->sc_mode == K_RAW) { 757 return (keycode); 758 } 759 760 /* return the key code in the K_CODE mode */ 761 /* XXX: keycode |= SCAN_RELEASE; */ 762 763 if (sc->sc_mode == K_CODE) { 764 return (keycode); 765 } 766 767 /* keycode to key action */ 768 action = genkbd_keyaction(kbd, SCAN_CHAR(keycode), 769 (keycode & SCAN_RELEASE), 770 &sc->sc_state, &sc->sc_accents); 771 if (action == NOKEY) { 772 goto next_code; 773 } 774 775 return (action); 776 } 777 778 /* Currently wait is always false. */ 779 static uint32_t 780 gpiokeys_read_char(keyboard_t *kbd, int wait) 781 { 782 uint32_t keycode; 783 struct gpiokeys_softc *sc = kbd->kb_data; 784 785 GPIOKEYS_LOCK(sc); 786 keycode = gpiokeys_read_char_locked(kbd, wait); 787 GPIOKEYS_UNLOCK(sc); 788 789 return (keycode); 790 } 791 792 /* some useful control functions */ 793 static int 794 gpiokeys_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg) 795 { 796 struct gpiokeys_softc *sc = kbd->kb_data; 797 #if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 798 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 799 int ival; 800 801 #endif 802 803 switch (cmd) { 804 case KDGKBMODE: /* get keyboard mode */ 805 *(int *)arg = sc->sc_mode; 806 break; 807 #if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 808 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 809 case _IO('K', 7): 810 ival = IOCPARM_IVAL(arg); 811 arg = (caddr_t)&ival; 812 /* FALLTHROUGH */ 813 #endif 814 case KDSKBMODE: /* set keyboard mode */ 815 switch (*(int *)arg) { 816 case K_XLATE: 817 if (sc->sc_mode != K_XLATE) { 818 /* make lock key state and LED state match */ 819 sc->sc_state &= ~LOCK_MASK; 820 sc->sc_state |= KBD_LED_VAL(kbd); 821 } 822 /* FALLTHROUGH */ 823 case K_RAW: 824 case K_CODE: 825 if (sc->sc_mode != *(int *)arg) { 826 if ((sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) == 0) 827 gpiokeys_clear_state(kbd); 828 sc->sc_mode = *(int *)arg; 829 } 830 break; 831 default: 832 return (EINVAL); 833 } 834 break; 835 836 case KDGETLED: /* get keyboard LED */ 837 *(int *)arg = KBD_LED_VAL(kbd); 838 break; 839 #if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 840 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 841 case _IO('K', 66): 842 ival = IOCPARM_IVAL(arg); 843 arg = (caddr_t)&ival; 844 /* FALLTHROUGH */ 845 #endif 846 case KDSETLED: /* set keyboard LED */ 847 KBD_LED_VAL(kbd) = *(int *)arg; 848 break; 849 case KDGKBSTATE: /* get lock key state */ 850 *(int *)arg = sc->sc_state & LOCK_MASK; 851 break; 852 #if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 853 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 854 case _IO('K', 20): 855 ival = IOCPARM_IVAL(arg); 856 arg = (caddr_t)&ival; 857 /* FALLTHROUGH */ 858 #endif 859 case KDSKBSTATE: /* set lock key state */ 860 if (*(int *)arg & ~LOCK_MASK) { 861 return (EINVAL); 862 } 863 sc->sc_state &= ~LOCK_MASK; 864 sc->sc_state |= *(int *)arg; 865 return (0); 866 867 case KDSETREPEAT: /* set keyboard repeat rate (new 868 * interface) */ 869 if (!KBD_HAS_DEVICE(kbd)) { 870 return (0); 871 } 872 if (((int *)arg)[1] < 0) { 873 return (EINVAL); 874 } 875 if (((int *)arg)[0] < 0) { 876 return (EINVAL); 877 } 878 if (((int *)arg)[0] < 200) /* fastest possible value */ 879 kbd->kb_delay1 = 200; 880 else 881 kbd->kb_delay1 = ((int *)arg)[0]; 882 kbd->kb_delay2 = ((int *)arg)[1]; 883 return (0); 884 885 #if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 886 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 887 case _IO('K', 67): 888 ival = IOCPARM_IVAL(arg); 889 arg = (caddr_t)&ival; 890 /* FALLTHROUGH */ 891 #endif 892 case KDSETRAD: /* set keyboard repeat rate (old 893 * interface) */ 894 return (gpiokeys_set_typematic(kbd, *(int *)arg)); 895 896 case PIO_KEYMAP: /* set keyboard translation table */ 897 case OPIO_KEYMAP: /* set keyboard translation table 898 * (compat) */ 899 case PIO_KEYMAPENT: /* set keyboard translation table 900 * entry */ 901 case PIO_DEADKEYMAP: /* set accent key translation table */ 902 sc->sc_accents = 0; 903 /* FALLTHROUGH */ 904 default: 905 return (genkbd_commonioctl(kbd, cmd, arg)); 906 } 907 908 return (0); 909 } 910 911 static int 912 gpiokeys_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg) 913 { 914 int result; 915 struct gpiokeys_softc *sc; 916 917 sc = kbd->kb_data; 918 /* 919 * XXX Check if someone is calling us from a critical section: 920 */ 921 if (curthread->td_critnest != 0) 922 return (EDEADLK); 923 924 GPIOKEYS_LOCK(sc); 925 result = gpiokeys_ioctl_locked(kbd, cmd, arg); 926 GPIOKEYS_UNLOCK(sc); 927 928 return (result); 929 } 930 931 /* clear the internal state of the keyboard */ 932 static void 933 gpiokeys_clear_state(keyboard_t *kbd) 934 { 935 struct gpiokeys_softc *sc = kbd->kb_data; 936 937 sc->sc_flags &= ~(GPIOKEYS_GLOBAL_FLAG_POLLING); 938 sc->sc_state &= LOCK_MASK; /* preserve locking key state */ 939 sc->sc_accents = 0; 940 } 941 942 /* get the internal state, not used */ 943 static int 944 gpiokeys_get_state(keyboard_t *kbd, void *buf, size_t len) 945 { 946 return (len == 0) ? 1 : -1; 947 } 948 949 /* set the internal state, not used */ 950 static int 951 gpiokeys_set_state(keyboard_t *kbd, void *buf, size_t len) 952 { 953 return (EINVAL); 954 } 955 956 static int 957 gpiokeys_poll(keyboard_t *kbd, int on) 958 { 959 struct gpiokeys_softc *sc = kbd->kb_data; 960 961 GPIOKEYS_LOCK(sc); 962 if (on) 963 sc->sc_flags |= GPIOKEYS_GLOBAL_FLAG_POLLING; 964 else 965 sc->sc_flags &= ~GPIOKEYS_GLOBAL_FLAG_POLLING; 966 GPIOKEYS_UNLOCK(sc); 967 968 return (0); 969 } 970 971 static int 972 gpiokeys_set_typematic(keyboard_t *kbd, int code) 973 { 974 static const int delays[] = {250, 500, 750, 1000}; 975 static const int rates[] = {34, 38, 42, 46, 50, 55, 59, 63, 976 68, 76, 84, 92, 100, 110, 118, 126, 977 136, 152, 168, 184, 200, 220, 236, 252, 978 272, 304, 336, 368, 400, 440, 472, 504}; 979 980 if (code & ~0x7f) { 981 return (EINVAL); 982 } 983 kbd->kb_delay1 = delays[(code >> 5) & 3]; 984 kbd->kb_delay2 = rates[code & 0x1f]; 985 return (0); 986 } 987 988 static void 989 gpiokeys_event_keyinput(struct gpiokeys_softc *sc) 990 { 991 int c; 992 993 if ((sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) != 0) 994 return; 995 996 if (KBD_IS_ACTIVE(&sc->sc_kbd) && 997 KBD_IS_BUSY(&sc->sc_kbd)) { 998 /* let the callback function process the input */ 999 (sc->sc_kbd.kb_callback.kc_func) (&sc->sc_kbd, KBDIO_KEYINPUT, 1000 sc->sc_kbd.kb_callback.kc_arg); 1001 } else { 1002 /* read and discard the input, no one is waiting for it */ 1003 do { 1004 c = gpiokeys_read_char(&sc->sc_kbd, 0); 1005 } while (c != NOKEY); 1006 } 1007 } 1008 1009 static keyboard_switch_t gpiokeyssw = { 1010 .probe = &gpiokeys__probe, 1011 .init = &gpiokeys_init, 1012 .term = &gpiokeys_term, 1013 .intr = &gpiokeys_intr, 1014 .test_if = &gpiokeys_test_if, 1015 .enable = &gpiokeys_enable, 1016 .disable = &gpiokeys_disable, 1017 .read = &gpiokeys_read, 1018 .check = &gpiokeys_check, 1019 .read_char = &gpiokeys_read_char, 1020 .check_char = &gpiokeys_check_char, 1021 .ioctl = &gpiokeys_ioctl, 1022 .lock = &gpiokeys_lock, 1023 .clear_state = &gpiokeys_clear_state, 1024 .get_state = &gpiokeys_get_state, 1025 .set_state = &gpiokeys_set_state, 1026 .poll = &gpiokeys_poll, 1027 }; 1028 1029 KEYBOARD_DRIVER(gpiokeys, gpiokeyssw, gpiokeys_configure); 1030 1031 static int 1032 gpiokeys_driver_load(module_t mod, int what, void *arg) 1033 { 1034 switch (what) { 1035 case MOD_LOAD: 1036 kbd_add_driver(&gpiokeys_kbd_driver); 1037 break; 1038 case MOD_UNLOAD: 1039 kbd_delete_driver(&gpiokeys_kbd_driver); 1040 break; 1041 } 1042 return (0); 1043 } 1044 1045 static device_method_t gpiokeys_methods[] = { 1046 DEVMETHOD(device_probe, gpiokeys_probe), 1047 DEVMETHOD(device_attach, gpiokeys_attach), 1048 DEVMETHOD(device_detach, gpiokeys_detach), 1049 1050 DEVMETHOD_END 1051 }; 1052 1053 static driver_t gpiokeys_driver = { 1054 "gpiokeys", 1055 gpiokeys_methods, 1056 sizeof(struct gpiokeys_softc), 1057 }; 1058 1059 DRIVER_MODULE(gpiokeys, simplebus, gpiokeys_driver, gpiokeys_driver_load, NULL); 1060 MODULE_VERSION(gpiokeys, 1);
Cache object: e9576beb35496f99297df0a7bf846a2f
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