gpiokeys.c revision 356020
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: stable/11/sys/dev/gpio/gpiokeys.c 356020 2019-12-22 19:06:45Z kevans $"); 29 30#include "opt_platform.h" 31#include "opt_kbd.h" 32 33#include <sys/param.h> 34#include <sys/systm.h> 35#include <sys/bus.h> 36#include <sys/gpio.h> 37#include <sys/kernel.h> 38#include <sys/lock.h> 39#include <sys/malloc.h> 40#include <sys/module.h> 41#include <sys/mutex.h> 42#include <sys/proc.h> 43#include <sys/kdb.h> 44 45#include <sys/ioccom.h> 46#include <sys/filio.h> 47#include <sys/kbio.h> 48 49#include <dev/kbd/kbdreg.h> 50#include <dev/kbd/kbdtables.h> 51 52#include <dev/fdt/fdt_common.h> 53#include <dev/ofw/ofw_bus.h> 54#include <dev/ofw/ofw_bus_subr.h> 55 56#include <dev/gpio/gpiobusvar.h> 57#include <dev/gpio/gpiokeys.h> 58 59#define KBD_DRIVER_NAME "gpiokeys" 60 61#define GPIOKEYS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 62#define GPIOKEYS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 63#define GPIOKEYS_LOCK_INIT(_sc) \ 64 mtx_init(&_sc->sc_mtx, device_get_nameunit((_sc)->sc_dev), \ 65 "gpiokeys", MTX_DEF) 66#define GPIOKEYS_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->sc_mtx); 67#define GPIOKEYS_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->sc_mtx, MA_OWNED) 68 69#define GPIOKEY_LOCK(_key) mtx_lock(&(_key)->mtx) 70#define GPIOKEY_UNLOCK(_key) mtx_unlock(&(_key)->mtx) 71#define GPIOKEY_LOCK_INIT(_key) \ 72 mtx_init(&(_key)->mtx, "gpiokey", "gpiokey", MTX_DEF) 73#define GPIOKEY_LOCK_DESTROY(_key) mtx_destroy(&(_key)->mtx); 74 75#define KEY_PRESS 0 76#define KEY_RELEASE 0x80 77 78#define SCAN_PRESS 0 79#define SCAN_RELEASE 0x80 80#define SCAN_CHAR(c) ((c) & 0x7f) 81 82#define GPIOKEYS_GLOBAL_NMOD 8 /* units */ 83#define GPIOKEYS_GLOBAL_NKEYCODE 6 /* units */ 84#define GPIOKEYS_GLOBAL_IN_BUF_SIZE (2*(GPIOKEYS_GLOBAL_NMOD + (2*GPIOKEYS_GLOBAL_NKEYCODE))) /* bytes */ 85#define GPIOKEYS_GLOBAL_IN_BUF_FULL (GPIOKEYS_GLOBAL_IN_BUF_SIZE / 2) /* bytes */ 86#define GPIOKEYS_GLOBAL_NFKEY (sizeof(fkey_tab)/sizeof(fkey_tab[0])) /* units */ 87#define GPIOKEYS_GLOBAL_BUFFER_SIZE 64 /* bytes */ 88 89#define AUTOREPEAT_DELAY 250 90#define AUTOREPEAT_REPEAT 34 91 92struct gpiokeys_softc; 93 94struct gpiokey 95{ 96 struct gpiokeys_softc *parent_sc; 97 gpio_pin_t pin; 98 int irq_rid; 99 struct resource *irq_res; 100 void *intr_hl; 101 struct mtx mtx; 102 uint32_t keycode; 103 int autorepeat; 104 struct callout debounce_callout; 105 struct callout repeat_callout; 106 int repeat_delay; 107 int repeat; 108 int debounce_interval; 109}; 110 111struct gpiokeys_softc 112{ 113 device_t sc_dev; 114 struct mtx sc_mtx; 115 struct gpiokey *sc_keys; 116 int sc_total_keys; 117 118 keyboard_t sc_kbd; 119 keymap_t sc_keymap; 120 accentmap_t sc_accmap; 121 fkeytab_t sc_fkeymap[GPIOKEYS_GLOBAL_NFKEY]; 122 123 uint32_t sc_input[GPIOKEYS_GLOBAL_IN_BUF_SIZE]; /* input buffer */ 124 uint32_t sc_time_ms; 125#define GPIOKEYS_GLOBAL_FLAG_POLLING 0x00000002 126 127 uint32_t sc_flags; /* flags */ 128 129 int sc_mode; /* input mode (K_XLATE,K_RAW,K_CODE) */ 130 int sc_state; /* shift/lock key state */ 131 int sc_accents; /* accent key index (> 0) */ 132 int sc_kbd_size; 133 134 uint16_t sc_inputs; 135 uint16_t sc_inputhead; 136 uint16_t sc_inputtail; 137 138 uint8_t sc_kbd_id; 139}; 140 141/* gpio-keys device */ 142static int gpiokeys_probe(device_t); 143static int gpiokeys_attach(device_t); 144static int gpiokeys_detach(device_t); 145 146/* kbd methods prototypes */ 147static int gpiokeys_set_typematic(keyboard_t *, int); 148static uint32_t gpiokeys_read_char(keyboard_t *, int); 149static void gpiokeys_clear_state(keyboard_t *); 150static int gpiokeys_ioctl(keyboard_t *, u_long, caddr_t); 151static int gpiokeys_enable(keyboard_t *); 152static int gpiokeys_disable(keyboard_t *); 153static void gpiokeys_event_keyinput(struct gpiokeys_softc *); 154 155static void 156gpiokeys_put_key(struct gpiokeys_softc *sc, uint32_t key) 157{ 158 159 GPIOKEYS_ASSERT_LOCKED(sc); 160 161 if (sc->sc_inputs < GPIOKEYS_GLOBAL_IN_BUF_SIZE) { 162 sc->sc_input[sc->sc_inputtail] = key; 163 ++(sc->sc_inputs); 164 ++(sc->sc_inputtail); 165 if (sc->sc_inputtail >= GPIOKEYS_GLOBAL_IN_BUF_SIZE) { 166 sc->sc_inputtail = 0; 167 } 168 } else { 169 device_printf(sc->sc_dev, "input buffer is full\n"); 170 } 171} 172 173static void 174gpiokeys_key_event(struct gpiokeys_softc *sc, uint16_t keycode, int pressed) 175{ 176 uint32_t key; 177 178 179 key = keycode & SCAN_KEYCODE_MASK; 180 181 if (!pressed) 182 key |= KEY_RELEASE; 183 184 GPIOKEYS_LOCK(sc); 185 if (keycode & SCAN_PREFIX_E0) 186 gpiokeys_put_key(sc, 0xe0); 187 else if (keycode & SCAN_PREFIX_E1) 188 gpiokeys_put_key(sc, 0xe1); 189 190 gpiokeys_put_key(sc, key); 191 GPIOKEYS_UNLOCK(sc); 192 193 gpiokeys_event_keyinput(sc); 194} 195 196static void 197gpiokey_autorepeat(void *arg) 198{ 199 struct gpiokey *key; 200 201 key = arg; 202 203 if (key->keycode == GPIOKEY_NONE) 204 return; 205 206 gpiokeys_key_event(key->parent_sc, key->keycode, 1); 207 208 callout_reset(&key->repeat_callout, key->repeat, 209 gpiokey_autorepeat, key); 210} 211 212static void 213gpiokey_debounced_intr(void *arg) 214{ 215 struct gpiokey *key; 216 bool active; 217 218 key = arg; 219 220 if (key->keycode == GPIOKEY_NONE) 221 return; 222 223 gpio_pin_is_active(key->pin, &active); 224 if (active) { 225 gpiokeys_key_event(key->parent_sc, key->keycode, 1); 226 if (key->autorepeat) { 227 callout_reset(&key->repeat_callout, key->repeat_delay, 228 gpiokey_autorepeat, key); 229 } 230 } 231 else { 232 if (key->autorepeat && 233 callout_pending(&key->repeat_callout)) 234 callout_stop(&key->repeat_callout); 235 gpiokeys_key_event(key->parent_sc, key->keycode, 0); 236 } 237} 238 239static void 240gpiokey_intr(void *arg) 241{ 242 struct gpiokey *key; 243 int debounce_ticks; 244 245 key = arg; 246 247 GPIOKEY_LOCK(key); 248 debounce_ticks = (hz * key->debounce_interval) / 1000; 249 if (debounce_ticks == 0) 250 debounce_ticks = 1; 251 if (!callout_pending(&key->debounce_callout)) 252 callout_reset(&key->debounce_callout, debounce_ticks, 253 gpiokey_debounced_intr, key); 254 GPIOKEY_UNLOCK(key); 255} 256 257static void 258gpiokeys_attach_key(struct gpiokeys_softc *sc, phandle_t node, 259 struct gpiokey *key) 260{ 261 pcell_t prop; 262 char *name; 263 uint32_t code; 264 int err; 265 const char *key_name; 266 267 GPIOKEY_LOCK_INIT(key); 268 key->parent_sc = sc; 269 callout_init_mtx(&key->debounce_callout, &key->mtx, 0); 270 callout_init_mtx(&key->repeat_callout, &key->mtx, 0); 271 272 name = NULL; 273 if (OF_getprop_alloc(node, "label", 1, (void **)&name) == -1) 274 OF_getprop_alloc(node, "name", 1, (void **)&name); 275 276 if (name != NULL) 277 key_name = name; 278 else 279 key_name = "unknown"; 280 281 key->autorepeat = OF_hasprop(node, "autorepeat"); 282 283 key->repeat_delay = (hz * AUTOREPEAT_DELAY) / 1000; 284 if (key->repeat_delay == 0) 285 key->repeat_delay = 1; 286 287 key->repeat = (hz * AUTOREPEAT_REPEAT) / 1000; 288 if (key->repeat == 0) 289 key->repeat = 1; 290 291 if ((OF_getprop(node, "debounce-interval", &prop, sizeof(prop))) > 0) 292 key->debounce_interval = fdt32_to_cpu(prop); 293 else 294 key->debounce_interval = 5; 295 296 if ((OF_getprop(node, "freebsd,code", &prop, sizeof(prop))) > 0) 297 key->keycode = fdt32_to_cpu(prop); 298 else if ((OF_getprop(node, "linux,code", &prop, sizeof(prop))) > 0) { 299 code = fdt32_to_cpu(prop); 300 key->keycode = gpiokey_map_linux_code(code); 301 if (key->keycode == GPIOKEY_NONE) 302 device_printf(sc->sc_dev, "<%s> failed to map linux,code value 0x%x\n", 303 key_name, code); 304 } 305 else 306 device_printf(sc->sc_dev, "<%s> no linux,code or freebsd,code property\n", 307 key_name); 308 309 err = gpio_pin_get_by_ofw_idx(sc->sc_dev, node, 0, &key->pin); 310 if (err) { 311 device_printf(sc->sc_dev, "<%s> failed to map pin\n", key_name); 312 if (name) 313 OF_prop_free(name); 314 return; 315 } 316 317 key->irq_res = gpio_alloc_intr_resource(sc->sc_dev, &key->irq_rid, 318 RF_ACTIVE, key->pin, GPIO_INTR_EDGE_BOTH); 319 if (!key->irq_res) { 320 device_printf(sc->sc_dev, "<%s> cannot allocate interrupt\n", key_name); 321 gpio_pin_release(key->pin); 322 key->pin = NULL; 323 if (name) 324 OF_prop_free(name); 325 return; 326 } 327 328 if (bus_setup_intr(sc->sc_dev, key->irq_res, INTR_TYPE_MISC | INTR_MPSAFE, 329 NULL, gpiokey_intr, key, 330 &key->intr_hl) != 0) { 331 device_printf(sc->sc_dev, "<%s> unable to setup the irq handler\n", key_name); 332 bus_release_resource(sc->sc_dev, SYS_RES_IRQ, key->irq_rid, 333 key->irq_res); 334 gpio_pin_release(key->pin); 335 key->pin = NULL; 336 key->irq_res = NULL; 337 if (name) 338 OF_prop_free(name); 339 return; 340 } 341 342 if (bootverbose) 343 device_printf(sc->sc_dev, "<%s> code=%08x, autorepeat=%d, "\ 344 "repeat=%d, repeat_delay=%d\n", key_name, key->keycode, 345 key->autorepeat, key->repeat, key->repeat_delay); 346 347 if (name) 348 OF_prop_free(name); 349} 350 351static void 352gpiokeys_detach_key(struct gpiokeys_softc *sc, struct gpiokey *key) 353{ 354 355 GPIOKEY_LOCK(key); 356 if (key->intr_hl) 357 bus_teardown_intr(sc->sc_dev, key->irq_res, key->intr_hl); 358 if (key->irq_res) 359 bus_release_resource(sc->sc_dev, SYS_RES_IRQ, 360 key->irq_rid, key->irq_res); 361 if (callout_pending(&key->repeat_callout)) 362 callout_drain(&key->repeat_callout); 363 if (callout_pending(&key->debounce_callout)) 364 callout_drain(&key->debounce_callout); 365 if (key->pin) 366 gpio_pin_release(key->pin); 367 GPIOKEY_UNLOCK(key); 368 369 GPIOKEY_LOCK_DESTROY(key); 370} 371 372static int 373gpiokeys_probe(device_t dev) 374{ 375 if (!ofw_bus_is_compatible(dev, "gpio-keys")) 376 return (ENXIO); 377 378 device_set_desc(dev, "GPIO keyboard"); 379 380 return (0); 381} 382 383static int 384gpiokeys_attach(device_t dev) 385{ 386 int unit; 387 struct gpiokeys_softc *sc; 388 keyboard_t *kbd; 389 phandle_t keys, child; 390 int total_keys; 391 392 if ((keys = ofw_bus_get_node(dev)) == -1) 393 return (ENXIO); 394 395 sc = device_get_softc(dev); 396 sc->sc_dev = dev; 397 kbd = &sc->sc_kbd; 398 399 GPIOKEYS_LOCK_INIT(sc); 400 unit = device_get_unit(dev); 401 kbd_init_struct(kbd, KBD_DRIVER_NAME, KB_OTHER, unit, 0, 0, 0); 402 403 kbd->kb_data = (void *)sc; 404 sc->sc_mode = K_XLATE; 405 406 sc->sc_keymap = key_map; 407 sc->sc_accmap = accent_map; 408 409 kbd_set_maps(kbd, &sc->sc_keymap, &sc->sc_accmap, 410 sc->sc_fkeymap, GPIOKEYS_GLOBAL_NFKEY); 411 412 KBD_FOUND_DEVICE(kbd); 413 414 gpiokeys_clear_state(kbd); 415 416 KBD_PROBE_DONE(kbd); 417 418 KBD_INIT_DONE(kbd); 419 420 if (kbd_register(kbd) < 0) { 421 goto detach; 422 } 423 424 KBD_CONFIG_DONE(kbd); 425 426 gpiokeys_enable(kbd); 427 428#ifdef KBD_INSTALL_CDEV 429 if (kbd_attach(kbd)) { 430 goto detach; 431 } 432#endif 433 434 if (bootverbose) { 435 kbdd_diag(kbd, 1); 436 } 437 438 total_keys = 0; 439 440 /* Traverse the 'gpio-keys' node and count keys */ 441 for (child = OF_child(keys); child != 0; child = OF_peer(child)) { 442 if (!OF_hasprop(child, "gpios")) 443 continue; 444 total_keys++; 445 } 446 447 if (total_keys) { 448 sc->sc_keys = malloc(sizeof(struct gpiokey) * total_keys, 449 M_DEVBUF, M_WAITOK | M_ZERO); 450 451 sc->sc_total_keys = 0; 452 /* Traverse the 'gpio-keys' node and count keys */ 453 for (child = OF_child(keys); child != 0; child = OF_peer(child)) { 454 if (!OF_hasprop(child, "gpios")) 455 continue; 456 gpiokeys_attach_key(sc, child ,&sc->sc_keys[sc->sc_total_keys]); 457 sc->sc_total_keys++; 458 } 459 } 460 461 return (0); 462 463detach: 464 gpiokeys_detach(dev); 465 return (ENXIO); 466} 467 468static int 469gpiokeys_detach(device_t dev) 470{ 471 struct gpiokeys_softc *sc; 472 keyboard_t *kbd; 473 int i; 474 475 sc = device_get_softc(dev); 476 477 for (i = 0; i < sc->sc_total_keys; i++) 478 gpiokeys_detach_key(sc, &sc->sc_keys[i]); 479 480 kbd = kbd_get_keyboard(kbd_find_keyboard(KBD_DRIVER_NAME, 481 device_get_unit(dev))); 482 483#ifdef KBD_INSTALL_CDEV 484 kbd_detach(kbd); 485#endif 486 kbd_unregister(kbd); 487 488 GPIOKEYS_LOCK_DESTROY(sc); 489 if (sc->sc_keys) 490 free(sc->sc_keys, M_DEVBUF); 491 492 return (0); 493} 494 495/* early keyboard probe, not supported */ 496static int 497gpiokeys_configure(int flags) 498{ 499 return (0); 500} 501 502/* detect a keyboard, not used */ 503static int 504gpiokeys__probe(int unit, void *arg, int flags) 505{ 506 return (ENXIO); 507} 508 509/* reset and initialize the device, not used */ 510static int 511gpiokeys_init(int unit, keyboard_t **kbdp, void *arg, int flags) 512{ 513 return (ENXIO); 514} 515 516/* test the interface to the device, not used */ 517static int 518gpiokeys_test_if(keyboard_t *kbd) 519{ 520 return (0); 521} 522 523/* finish using this keyboard, not used */ 524static int 525gpiokeys_term(keyboard_t *kbd) 526{ 527 return (ENXIO); 528} 529 530/* keyboard interrupt routine, not used */ 531static int 532gpiokeys_intr(keyboard_t *kbd, void *arg) 533{ 534 return (0); 535} 536 537/* lock the access to the keyboard, not used */ 538static int 539gpiokeys_lock(keyboard_t *kbd, int lock) 540{ 541 return (1); 542} 543 544/* 545 * Enable the access to the device; until this function is called, 546 * the client cannot read from the keyboard. 547 */ 548static int 549gpiokeys_enable(keyboard_t *kbd) 550{ 551 struct gpiokeys_softc *sc; 552 553 sc = kbd->kb_data; 554 GPIOKEYS_LOCK(sc); 555 KBD_ACTIVATE(kbd); 556 GPIOKEYS_UNLOCK(sc); 557 558 return (0); 559} 560 561/* disallow the access to the device */ 562static int 563gpiokeys_disable(keyboard_t *kbd) 564{ 565 struct gpiokeys_softc *sc; 566 567 sc = kbd->kb_data; 568 GPIOKEYS_LOCK(sc); 569 KBD_DEACTIVATE(kbd); 570 GPIOKEYS_UNLOCK(sc); 571 572 return (0); 573} 574 575static void 576gpiokeys_do_poll(struct gpiokeys_softc *sc, uint8_t wait) 577{ 578 579 KASSERT((sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) != 0, 580 ("gpiokeys_do_poll called when not polling\n")); 581 582 GPIOKEYS_ASSERT_LOCKED(sc); 583 584 if (!kdb_active && !SCHEDULER_STOPPED()) { 585 while (sc->sc_inputs == 0) { 586 kern_yield(PRI_UNCHANGED); 587 if (!wait) 588 break; 589 } 590 return; 591 } 592 593 while ((sc->sc_inputs == 0) && wait) { 594 printf("POLL!\n"); 595 } 596} 597 598/* check if data is waiting */ 599static int 600gpiokeys_check(keyboard_t *kbd) 601{ 602 struct gpiokeys_softc *sc = kbd->kb_data; 603 604 GPIOKEYS_ASSERT_LOCKED(sc); 605 606 if (!KBD_IS_ACTIVE(kbd)) 607 return (0); 608 609 if (sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) 610 gpiokeys_do_poll(sc, 0); 611 612 if (sc->sc_inputs > 0) { 613 return (1); 614 } 615 return (0); 616} 617 618/* check if char is waiting */ 619static int 620gpiokeys_check_char_locked(keyboard_t *kbd) 621{ 622 if (!KBD_IS_ACTIVE(kbd)) 623 return (0); 624 625 return (gpiokeys_check(kbd)); 626} 627 628static int 629gpiokeys_check_char(keyboard_t *kbd) 630{ 631 int result; 632 struct gpiokeys_softc *sc = kbd->kb_data; 633 634 GPIOKEYS_LOCK(sc); 635 result = gpiokeys_check_char_locked(kbd); 636 GPIOKEYS_UNLOCK(sc); 637 638 return (result); 639} 640 641static int32_t 642gpiokeys_get_key(struct gpiokeys_softc *sc, uint8_t wait) 643{ 644 int32_t c; 645 646 KASSERT((!kdb_active && !SCHEDULER_STOPPED()) 647 || (sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) != 0, 648 ("not polling in kdb or panic\n")); 649 650 GPIOKEYS_ASSERT_LOCKED(sc); 651 652 if (sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) 653 gpiokeys_do_poll(sc, wait); 654 655 if (sc->sc_inputs == 0) { 656 c = -1; 657 } else { 658 c = sc->sc_input[sc->sc_inputhead]; 659 --(sc->sc_inputs); 660 ++(sc->sc_inputhead); 661 if (sc->sc_inputhead >= GPIOKEYS_GLOBAL_IN_BUF_SIZE) { 662 sc->sc_inputhead = 0; 663 } 664 } 665 666 return (c); 667} 668 669/* read one byte from the keyboard if it's allowed */ 670static int 671gpiokeys_read(keyboard_t *kbd, int wait) 672{ 673 struct gpiokeys_softc *sc = kbd->kb_data; 674 int32_t keycode; 675 676 if (!KBD_IS_ACTIVE(kbd)) 677 return (-1); 678 679 /* XXX */ 680 keycode = gpiokeys_get_key(sc, (wait == FALSE) ? 0 : 1); 681 if (!KBD_IS_ACTIVE(kbd) || (keycode == -1)) 682 return (-1); 683 684 ++(kbd->kb_count); 685 686 return (keycode); 687} 688 689/* read char from the keyboard */ 690static uint32_t 691gpiokeys_read_char_locked(keyboard_t *kbd, int wait) 692{ 693 struct gpiokeys_softc *sc = kbd->kb_data; 694 uint32_t action; 695 uint32_t keycode; 696 697 if (!KBD_IS_ACTIVE(kbd)) 698 return (NOKEY); 699 700next_code: 701 702 /* see if there is something in the keyboard port */ 703 /* XXX */ 704 keycode = gpiokeys_get_key(sc, (wait == FALSE) ? 0 : 1); 705 ++kbd->kb_count; 706 707 /* return the byte as is for the K_RAW mode */ 708 if (sc->sc_mode == K_RAW) { 709 return (keycode); 710 } 711 712 /* return the key code in the K_CODE mode */ 713 /* XXX: keycode |= SCAN_RELEASE; */ 714 715 if (sc->sc_mode == K_CODE) { 716 return (keycode); 717 } 718 719 /* keycode to key action */ 720 action = genkbd_keyaction(kbd, SCAN_CHAR(keycode), 721 (keycode & SCAN_RELEASE), 722 &sc->sc_state, &sc->sc_accents); 723 if (action == NOKEY) { 724 goto next_code; 725 } 726 727 return (action); 728} 729 730/* Currently wait is always false. */ 731static uint32_t 732gpiokeys_read_char(keyboard_t *kbd, int wait) 733{ 734 uint32_t keycode; 735 struct gpiokeys_softc *sc = kbd->kb_data; 736 737 GPIOKEYS_LOCK(sc); 738 keycode = gpiokeys_read_char_locked(kbd, wait); 739 GPIOKEYS_UNLOCK(sc); 740 741 return (keycode); 742} 743 744/* some useful control functions */ 745static int 746gpiokeys_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg) 747{ 748 struct gpiokeys_softc *sc = kbd->kb_data; 749#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 750 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 751 int ival; 752 753#endif 754 755 switch (cmd) { 756 case KDGKBMODE: /* get keyboard mode */ 757 *(int *)arg = sc->sc_mode; 758 break; 759#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 760 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 761 case _IO('K', 7): 762 ival = IOCPARM_IVAL(arg); 763 arg = (caddr_t)&ival; 764 /* FALLTHROUGH */ 765#endif 766 case KDSKBMODE: /* set keyboard mode */ 767 switch (*(int *)arg) { 768 case K_XLATE: 769 if (sc->sc_mode != K_XLATE) { 770 /* make lock key state and LED state match */ 771 sc->sc_state &= ~LOCK_MASK; 772 sc->sc_state |= KBD_LED_VAL(kbd); 773 } 774 /* FALLTHROUGH */ 775 case K_RAW: 776 case K_CODE: 777 if (sc->sc_mode != *(int *)arg) { 778 if ((sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) == 0) 779 gpiokeys_clear_state(kbd); 780 sc->sc_mode = *(int *)arg; 781 } 782 break; 783 default: 784 return (EINVAL); 785 } 786 break; 787 788 case KDGETLED: /* get keyboard LED */ 789 *(int *)arg = KBD_LED_VAL(kbd); 790 break; 791#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 792 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 793 case _IO('K', 66): 794 ival = IOCPARM_IVAL(arg); 795 arg = (caddr_t)&ival; 796 /* FALLTHROUGH */ 797#endif 798 case KDSETLED: /* set keyboard LED */ 799 KBD_LED_VAL(kbd) = *(int *)arg; 800 break; 801 case KDGKBSTATE: /* get lock key state */ 802 *(int *)arg = sc->sc_state & LOCK_MASK; 803 break; 804#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 805 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 806 case _IO('K', 20): 807 ival = IOCPARM_IVAL(arg); 808 arg = (caddr_t)&ival; 809 /* FALLTHROUGH */ 810#endif 811 case KDSKBSTATE: /* set lock key state */ 812 if (*(int *)arg & ~LOCK_MASK) { 813 return (EINVAL); 814 } 815 sc->sc_state &= ~LOCK_MASK; 816 sc->sc_state |= *(int *)arg; 817 return (0); 818 819 case KDSETREPEAT: /* set keyboard repeat rate (new 820 * interface) */ 821 if (!KBD_HAS_DEVICE(kbd)) { 822 return (0); 823 } 824 if (((int *)arg)[1] < 0) { 825 return (EINVAL); 826 } 827 if (((int *)arg)[0] < 0) { 828 return (EINVAL); 829 } 830 if (((int *)arg)[0] < 200) /* fastest possible value */ 831 kbd->kb_delay1 = 200; 832 else 833 kbd->kb_delay1 = ((int *)arg)[0]; 834 kbd->kb_delay2 = ((int *)arg)[1]; 835 return (0); 836 837#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 838 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 839 case _IO('K', 67): 840 ival = IOCPARM_IVAL(arg); 841 arg = (caddr_t)&ival; 842 /* FALLTHROUGH */ 843#endif 844 case KDSETRAD: /* set keyboard repeat rate (old 845 * interface) */ 846 return (gpiokeys_set_typematic(kbd, *(int *)arg)); 847 848 case PIO_KEYMAP: /* set keyboard translation table */ 849 case OPIO_KEYMAP: /* set keyboard translation table 850 * (compat) */ 851 case PIO_KEYMAPENT: /* set keyboard translation table 852 * entry */ 853 case PIO_DEADKEYMAP: /* set accent key translation table */ 854 sc->sc_accents = 0; 855 /* FALLTHROUGH */ 856 default: 857 return (genkbd_commonioctl(kbd, cmd, arg)); 858 } 859 860 return (0); 861} 862 863static int 864gpiokeys_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg) 865{ 866 int result; 867 struct gpiokeys_softc *sc; 868 869 sc = kbd->kb_data; 870 /* 871 * XXX Check if someone is calling us from a critical section: 872 */ 873 if (curthread->td_critnest != 0) 874 return (EDEADLK); 875 876 GPIOKEYS_LOCK(sc); 877 result = gpiokeys_ioctl_locked(kbd, cmd, arg); 878 GPIOKEYS_UNLOCK(sc); 879 880 return (result); 881} 882 883/* clear the internal state of the keyboard */ 884static void 885gpiokeys_clear_state(keyboard_t *kbd) 886{ 887 struct gpiokeys_softc *sc = kbd->kb_data; 888 889 sc->sc_flags &= ~(GPIOKEYS_GLOBAL_FLAG_POLLING); 890 sc->sc_state &= LOCK_MASK; /* preserve locking key state */ 891 sc->sc_accents = 0; 892} 893 894/* get the internal state, not used */ 895static int 896gpiokeys_get_state(keyboard_t *kbd, void *buf, size_t len) 897{ 898 return (len == 0) ? 1 : -1; 899} 900 901/* set the internal state, not used */ 902static int 903gpiokeys_set_state(keyboard_t *kbd, void *buf, size_t len) 904{ 905 return (EINVAL); 906} 907 908static int 909gpiokeys_poll(keyboard_t *kbd, int on) 910{ 911 struct gpiokeys_softc *sc = kbd->kb_data; 912 913 GPIOKEYS_LOCK(sc); 914 if (on) 915 sc->sc_flags |= GPIOKEYS_GLOBAL_FLAG_POLLING; 916 else 917 sc->sc_flags &= ~GPIOKEYS_GLOBAL_FLAG_POLLING; 918 GPIOKEYS_UNLOCK(sc); 919 920 return (0); 921} 922 923static int 924gpiokeys_set_typematic(keyboard_t *kbd, int code) 925{ 926 static const int delays[] = {250, 500, 750, 1000}; 927 static const int rates[] = {34, 38, 42, 46, 50, 55, 59, 63, 928 68, 76, 84, 92, 100, 110, 118, 126, 929 136, 152, 168, 184, 200, 220, 236, 252, 930 272, 304, 336, 368, 400, 440, 472, 504}; 931 932 if (code & ~0x7f) { 933 return (EINVAL); 934 } 935 kbd->kb_delay1 = delays[(code >> 5) & 3]; 936 kbd->kb_delay2 = rates[code & 0x1f]; 937 return (0); 938} 939 940static void 941gpiokeys_event_keyinput(struct gpiokeys_softc *sc) 942{ 943 int c; 944 945 if ((sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) != 0) 946 return; 947 948 if (KBD_IS_ACTIVE(&sc->sc_kbd) && 949 KBD_IS_BUSY(&sc->sc_kbd)) { 950 /* let the callback function process the input */ 951 (sc->sc_kbd.kb_callback.kc_func) (&sc->sc_kbd, KBDIO_KEYINPUT, 952 sc->sc_kbd.kb_callback.kc_arg); 953 } else { 954 /* read and discard the input, no one is waiting for it */ 955 do { 956 c = gpiokeys_read_char(&sc->sc_kbd, 0); 957 } while (c != NOKEY); 958 } 959} 960 961static keyboard_switch_t gpiokeyssw = { 962 .probe = &gpiokeys__probe, 963 .init = &gpiokeys_init, 964 .term = &gpiokeys_term, 965 .intr = &gpiokeys_intr, 966 .test_if = &gpiokeys_test_if, 967 .enable = &gpiokeys_enable, 968 .disable = &gpiokeys_disable, 969 .read = &gpiokeys_read, 970 .check = &gpiokeys_check, 971 .read_char = &gpiokeys_read_char, 972 .check_char = &gpiokeys_check_char, 973 .ioctl = &gpiokeys_ioctl, 974 .lock = &gpiokeys_lock, 975 .clear_state = &gpiokeys_clear_state, 976 .get_state = &gpiokeys_get_state, 977 .set_state = &gpiokeys_set_state, 978 .poll = &gpiokeys_poll, 979}; 980 981KEYBOARD_DRIVER(gpiokeys, gpiokeyssw, gpiokeys_configure); 982 983static int 984gpiokeys_driver_load(module_t mod, int what, void *arg) 985{ 986 switch (what) { 987 case MOD_LOAD: 988 kbd_add_driver(&gpiokeys_kbd_driver); 989 break; 990 case MOD_UNLOAD: 991 kbd_delete_driver(&gpiokeys_kbd_driver); 992 break; 993 } 994 return (0); 995} 996 997static devclass_t gpiokeys_devclass; 998 999static device_method_t gpiokeys_methods[] = { 1000 DEVMETHOD(device_probe, gpiokeys_probe), 1001 DEVMETHOD(device_attach, gpiokeys_attach), 1002 DEVMETHOD(device_detach, gpiokeys_detach), 1003 1004 DEVMETHOD_END 1005}; 1006 1007static driver_t gpiokeys_driver = { 1008 "gpiokeys", 1009 gpiokeys_methods, 1010 sizeof(struct gpiokeys_softc), 1011}; 1012 1013DRIVER_MODULE(gpiokeys, simplebus, gpiokeys_driver, gpiokeys_devclass, gpiokeys_driver_load, 0); 1014MODULE_VERSION(gpiokeys, 1); 1015