pl050.c revision 256281
1/* 2 * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org> 3 * All rights reserved. 4 * 5 * Based on dev/usb/input/ukbd.c 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/10/sys/arm/versatile/pl050.c 244197 2012-12-13 23:19:13Z gonzo $"); 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/bus.h> 35#include <sys/kernel.h> 36#include <sys/module.h> 37#include <sys/malloc.h> 38#include <sys/rman.h> 39#include <sys/proc.h> 40#include <sys/sched.h> 41#include <sys/kdb.h> 42 43#include <machine/bus.h> 44#include <machine/cpu.h> 45#include <machine/frame.h> 46#include <machine/intr.h> 47 48#include <dev/fdt/fdt_common.h> 49#include <dev/ofw/openfirm.h> 50#include <dev/ofw/ofw_bus.h> 51#include <dev/ofw/ofw_bus_subr.h> 52 53#include <sys/ioccom.h> 54#include <sys/filio.h> 55#include <sys/tty.h> 56#include <sys/kbio.h> 57 58#include <dev/kbd/kbdreg.h> 59 60#include <machine/bus.h> 61#include <machine/fdt.h> 62 63#include <dev/kbd/kbdtables.h> 64 65#define KMI_LOCK() mtx_lock(&Giant) 66#define KMI_UNLOCK() mtx_unlock(&Giant) 67 68#ifdef INVARIANTS 69/* 70 * Assert that the lock is held in all contexts 71 * where the code can be executed. 72 */ 73#define KMI_LOCK_ASSERT() mtx_assert(&Giant, MA_OWNED) 74/* 75 * Assert that the lock is held in the contexts 76 * where it really has to be so. 77 */ 78#define KMI_CTX_LOCK_ASSERT() \ 79 do { \ 80 if (!kdb_active && panicstr == NULL) \ 81 mtx_assert(&Giant, MA_OWNED); \ 82 } while (0) 83#else 84#define KMI_LOCK_ASSERT() (void)0 85#define KMI_CTX_LOCK_ASSERT() (void)0 86#endif 87 88#define KMICR 0x00 89#define KMICR_TYPE_NONPS2 (1 << 5) 90#define KMICR_RXINTREN (1 << 4) 91#define KMICR_TXINTREN (1 << 3) 92#define KMICR_EN (1 << 2) 93#define KMICR_FKMID (1 << 1) 94#define KMICR_FKMIC (1 << 0) 95#define KMISTAT 0x04 96#define KMISTAT_TXEMPTY (1 << 6) 97#define KMISTAT_TXBUSY (1 << 5) 98#define KMISTAT_RXFULL (1 << 4) 99#define KMISTAT_RXBUSY (1 << 3) 100#define KMISTAT_RXPARITY (1 << 2) 101#define KMISTAT_KMIC (1 << 1) 102#define KMISTAT_KMID (1 << 0) 103#define KMIDATA 0x08 104#define KMICLKDIV 0x0C 105#define KMIIR 0x10 106#define KMIIR_TXINTR (1 << 1) 107#define KMIIR_RXINTR (1 << 0) 108 109#define KMI_DRIVER_NAME "kmi" 110#define KMI_NFKEY (sizeof(fkey_tab)/sizeof(fkey_tab[0])) /* units */ 111 112struct kmi_softc { 113 keyboard_t sc_kbd; 114 keymap_t sc_keymap; 115 accentmap_t sc_accmap; 116 fkeytab_t sc_fkeymap[KMI_NFKEY]; 117 118 struct resource* sc_mem_res; 119 struct resource* sc_irq_res; 120 void* sc_intr_hl; 121 122 int sc_mode; /* input mode (K_XLATE,K_RAW,K_CODE) */ 123 int sc_state; /* shift/lock key state */ 124 int sc_accents; /* accent key index (> 0) */ 125 uint32_t sc_flags; /* flags */ 126#define KMI_FLAG_COMPOSE 0x00000001 127#define KMI_FLAG_POLLING 0x00000002 128 129 struct thread *sc_poll_thread; 130}; 131 132/* Read/Write macros for Timer used as timecounter */ 133#define pl050_kmi_read_4(sc, reg) \ 134 bus_read_4((sc)->sc_mem_res, (reg)) 135 136#define pl050_kmi_write_4(sc, reg, val) \ 137 bus_write_4((sc)->sc_mem_res, (reg), (val)) 138 139/* prototypes */ 140static void kmi_set_leds(struct kmi_softc *, uint8_t); 141static int kmi_set_typematic(keyboard_t *, int); 142static uint32_t kmi_read_char(keyboard_t *, int); 143static void kmi_clear_state(keyboard_t *); 144static int kmi_ioctl(keyboard_t *, u_long, caddr_t); 145static int kmi_enable(keyboard_t *); 146static int kmi_disable(keyboard_t *); 147 148/* early keyboard probe, not supported */ 149static int 150kmi_configure(int flags) 151{ 152 return (0); 153} 154 155/* detect a keyboard, not used */ 156static int 157kmi_probe(int unit, void *arg, int flags) 158{ 159 return (ENXIO); 160} 161 162/* reset and initialize the device, not used */ 163static int 164kmi_init(int unit, keyboard_t **kbdp, void *arg, int flags) 165{ 166 return (ENXIO); 167} 168 169/* test the interface to the device, not used */ 170static int 171kmi_test_if(keyboard_t *kbd) 172{ 173 return (0); 174} 175 176/* finish using this keyboard, not used */ 177static int 178kmi_term(keyboard_t *kbd) 179{ 180 return (ENXIO); 181} 182 183/* keyboard interrupt routine, not used */ 184static int 185kmi_intr(keyboard_t *kbd, void *arg) 186{ 187 188 return (0); 189} 190 191/* lock the access to the keyboard, not used */ 192static int 193kmi_lock(keyboard_t *kbd, int lock) 194{ 195 return (1); 196} 197 198/* 199 * Enable the access to the device; until this function is called, 200 * the client cannot read from the keyboard. 201 */ 202static int 203kmi_enable(keyboard_t *kbd) 204{ 205 206 KMI_LOCK(); 207 KBD_ACTIVATE(kbd); 208 KMI_UNLOCK(); 209 210 return (0); 211} 212 213/* disallow the access to the device */ 214static int 215kmi_disable(keyboard_t *kbd) 216{ 217 218 KMI_LOCK(); 219 KBD_DEACTIVATE(kbd); 220 KMI_UNLOCK(); 221 222 return (0); 223} 224 225/* check if data is waiting */ 226static int 227kmi_check(keyboard_t *kbd) 228{ 229 struct kmi_softc *sc = kbd->kb_data; 230 uint32_t reg; 231 232 KMI_CTX_LOCK_ASSERT(); 233 234 if (!KBD_IS_ACTIVE(kbd)) 235 return (0); 236 237 reg = pl050_kmi_read_4(sc, KMIIR); 238 return (reg & KMIIR_RXINTR); 239} 240 241/* check if char is waiting */ 242static int 243kmi_check_char_locked(keyboard_t *kbd) 244{ 245 KMI_CTX_LOCK_ASSERT(); 246 247 if (!KBD_IS_ACTIVE(kbd)) 248 return (0); 249 250 return (kmi_check(kbd)); 251} 252 253static int 254kmi_check_char(keyboard_t *kbd) 255{ 256 int result; 257 258 KMI_LOCK(); 259 result = kmi_check_char_locked(kbd); 260 KMI_UNLOCK(); 261 262 return (result); 263} 264 265/* read one byte from the keyboard if it's allowed */ 266/* Currently unused. */ 267static int 268kmi_read(keyboard_t *kbd, int wait) 269{ 270 KMI_CTX_LOCK_ASSERT(); 271 272 if (!KBD_IS_ACTIVE(kbd)) 273 return (-1); 274 275 ++(kbd->kb_count); 276 printf("Implement ME: %s\n", __func__); 277 return (0); 278} 279 280/* read char from the keyboard */ 281static uint32_t 282kmi_read_char_locked(keyboard_t *kbd, int wait) 283{ 284 struct kmi_softc *sc = kbd->kb_data; 285 uint32_t reg, data; 286 287 KMI_CTX_LOCK_ASSERT(); 288 289 if (!KBD_IS_ACTIVE(kbd)) 290 return (NOKEY); 291 292 reg = pl050_kmi_read_4(sc, KMIIR); 293 if (reg & KMIIR_RXINTR) { 294 data = pl050_kmi_read_4(sc, KMIDATA); 295 return (data); 296 } 297 298 ++kbd->kb_count; 299 return (NOKEY); 300} 301 302/* Currently wait is always false. */ 303static uint32_t 304kmi_read_char(keyboard_t *kbd, int wait) 305{ 306 uint32_t keycode; 307 308 KMI_LOCK(); 309 keycode = kmi_read_char_locked(kbd, wait); 310 KMI_UNLOCK(); 311 312 return (keycode); 313} 314 315/* some useful control functions */ 316static int 317kmi_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg) 318{ 319 struct kmi_softc *sc = kbd->kb_data; 320 int i; 321#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 322 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 323 int ival; 324 325#endif 326 327 KMI_LOCK_ASSERT(); 328 329 switch (cmd) { 330 case KDGKBMODE: /* get keyboard mode */ 331 *(int *)arg = sc->sc_mode; 332 break; 333#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 334 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 335 case _IO('K', 7): 336 ival = IOCPARM_IVAL(arg); 337 arg = (caddr_t)&ival; 338 /* FALLTHROUGH */ 339#endif 340 case KDSKBMODE: /* set keyboard mode */ 341 switch (*(int *)arg) { 342 case K_XLATE: 343 if (sc->sc_mode != K_XLATE) { 344 /* make lock key state and LED state match */ 345 sc->sc_state &= ~LOCK_MASK; 346 sc->sc_state |= KBD_LED_VAL(kbd); 347 } 348 /* FALLTHROUGH */ 349 case K_RAW: 350 case K_CODE: 351 if (sc->sc_mode != *(int *)arg) { 352 if ((sc->sc_flags & KMI_FLAG_POLLING) == 0) 353 kmi_clear_state(kbd); 354 sc->sc_mode = *(int *)arg; 355 } 356 break; 357 default: 358 return (EINVAL); 359 } 360 break; 361 362 case KDGETLED: /* get keyboard LED */ 363 *(int *)arg = KBD_LED_VAL(kbd); 364 break; 365#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 366 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 367 case _IO('K', 66): 368 ival = IOCPARM_IVAL(arg); 369 arg = (caddr_t)&ival; 370 /* FALLTHROUGH */ 371#endif 372 case KDSETLED: /* set keyboard LED */ 373 /* NOTE: lock key state in "sc_state" won't be changed */ 374 if (*(int *)arg & ~LOCK_MASK) 375 return (EINVAL); 376 377 i = *(int *)arg; 378 379 /* replace CAPS LED with ALTGR LED for ALTGR keyboards */ 380 if (sc->sc_mode == K_XLATE && 381 kbd->kb_keymap->n_keys > ALTGR_OFFSET) { 382 if (i & ALKED) 383 i |= CLKED; 384 else 385 i &= ~CLKED; 386 } 387 if (KBD_HAS_DEVICE(kbd)) 388 kmi_set_leds(sc, i); 389 390 KBD_LED_VAL(kbd) = *(int *)arg; 391 break; 392 case KDGKBSTATE: /* get lock key state */ 393 *(int *)arg = sc->sc_state & LOCK_MASK; 394 break; 395#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 396 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 397 case _IO('K', 20): 398 ival = IOCPARM_IVAL(arg); 399 arg = (caddr_t)&ival; 400 /* FALLTHROUGH */ 401#endif 402 case KDSKBSTATE: /* set lock key state */ 403 if (*(int *)arg & ~LOCK_MASK) { 404 return (EINVAL); 405 } 406 sc->sc_state &= ~LOCK_MASK; 407 sc->sc_state |= *(int *)arg; 408 409 /* set LEDs and quit */ 410 return (kmi_ioctl(kbd, KDSETLED, arg)); 411 412 case KDSETREPEAT: /* set keyboard repeat rate (new 413 * interface) */ 414 if (!KBD_HAS_DEVICE(kbd)) { 415 return (0); 416 } 417 if (((int *)arg)[1] < 0) { 418 return (EINVAL); 419 } 420 if (((int *)arg)[0] < 0) { 421 return (EINVAL); 422 } 423 if (((int *)arg)[0] < 200) /* fastest possible value */ 424 kbd->kb_delay1 = 200; 425 else 426 kbd->kb_delay1 = ((int *)arg)[0]; 427 kbd->kb_delay2 = ((int *)arg)[1]; 428 return (0); 429 430#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ 431 defined(COMPAT_FREEBSD4) || defined(COMPAT_43) 432 case _IO('K', 67): 433 ival = IOCPARM_IVAL(arg); 434 arg = (caddr_t)&ival; 435 /* FALLTHROUGH */ 436#endif 437 case KDSETRAD: /* set keyboard repeat rate (old 438 * interface) */ 439 return (kmi_set_typematic(kbd, *(int *)arg)); 440 441 case PIO_KEYMAP: /* set keyboard translation table */ 442 case OPIO_KEYMAP: /* set keyboard translation table 443 * (compat) */ 444 case PIO_KEYMAPENT: /* set keyboard translation table 445 * entry */ 446 case PIO_DEADKEYMAP: /* set accent key translation table */ 447 sc->sc_accents = 0; 448 /* FALLTHROUGH */ 449 default: 450 return (genkbd_commonioctl(kbd, cmd, arg)); 451 } 452 453 return (0); 454} 455 456static int 457kmi_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg) 458{ 459 int result; 460 461 /* 462 * XXX KDGKBSTATE, KDSKBSTATE and KDSETLED can be called from any 463 * context where printf(9) can be called, which among other things 464 * includes interrupt filters and threads with any kinds of locks 465 * already held. For this reason it would be dangerous to acquire 466 * the Giant here unconditionally. On the other hand we have to 467 * have it to handle the ioctl. 468 * So we make our best effort to auto-detect whether we can grab 469 * the Giant or not. Blame syscons(4) for this. 470 */ 471 switch (cmd) { 472 case KDGKBSTATE: 473 case KDSKBSTATE: 474 case KDSETLED: 475 if (!mtx_owned(&Giant) && !SCHEDULER_STOPPED()) 476 return (EDEADLK); /* best I could come up with */ 477 /* FALLTHROUGH */ 478 default: 479 KMI_LOCK(); 480 result = kmi_ioctl_locked(kbd, cmd, arg); 481 KMI_UNLOCK(); 482 return (result); 483 } 484} 485 486 487/* clear the internal state of the keyboard */ 488static void 489kmi_clear_state(keyboard_t *kbd) 490{ 491 struct kmi_softc *sc = kbd->kb_data; 492 493 KMI_CTX_LOCK_ASSERT(); 494 495 sc->sc_flags &= ~(KMI_FLAG_COMPOSE | KMI_FLAG_POLLING); 496 sc->sc_state &= LOCK_MASK; /* preserve locking key state */ 497 sc->sc_accents = 0; 498} 499 500/* save the internal state, not used */ 501static int 502kmi_get_state(keyboard_t *kbd, void *buf, size_t len) 503{ 504 return (len == 0) ? 1 : -1; 505} 506 507/* set the internal state, not used */ 508static int 509kmi_set_state(keyboard_t *kbd, void *buf, size_t len) 510{ 511 return (EINVAL); 512} 513 514static int 515kmi_poll(keyboard_t *kbd, int on) 516{ 517 struct kmi_softc *sc = kbd->kb_data; 518 519 KMI_LOCK(); 520 if (on) { 521 sc->sc_flags |= KMI_FLAG_POLLING; 522 sc->sc_poll_thread = curthread; 523 } else { 524 sc->sc_flags &= ~KMI_FLAG_POLLING; 525 } 526 KMI_UNLOCK(); 527 528 return (0); 529} 530 531/* local functions */ 532 533static void 534kmi_set_leds(struct kmi_softc *sc, uint8_t leds) 535{ 536 537 KMI_LOCK_ASSERT(); 538 539 /* start transfer, if not already started */ 540 printf("Implement me: %s\n", __func__); 541} 542 543static int 544kmi_set_typematic(keyboard_t *kbd, int code) 545{ 546 static const int delays[] = {250, 500, 750, 1000}; 547 static const int rates[] = {34, 38, 42, 46, 50, 55, 59, 63, 548 68, 76, 84, 92, 100, 110, 118, 126, 549 136, 152, 168, 184, 200, 220, 236, 252, 550 272, 304, 336, 368, 400, 440, 472, 504}; 551 552 if (code & ~0x7f) { 553 return (EINVAL); 554 } 555 kbd->kb_delay1 = delays[(code >> 5) & 3]; 556 kbd->kb_delay2 = rates[code & 0x1f]; 557 return (0); 558} 559 560static keyboard_switch_t kmisw = { 561 .probe = &kmi_probe, 562 .init = &kmi_init, 563 .term = &kmi_term, 564 .intr = &kmi_intr, 565 .test_if = &kmi_test_if, 566 .enable = &kmi_enable, 567 .disable = &kmi_disable, 568 .read = &kmi_read, 569 .check = &kmi_check, 570 .read_char = &kmi_read_char, 571 .check_char = &kmi_check_char, 572 .ioctl = &kmi_ioctl, 573 .lock = &kmi_lock, 574 .clear_state = &kmi_clear_state, 575 .get_state = &kmi_get_state, 576 .set_state = &kmi_set_state, 577 .get_fkeystr = &genkbd_get_fkeystr, 578 .poll = &kmi_poll, 579 .diag = &genkbd_diag, 580}; 581 582KEYBOARD_DRIVER(kmi, kmisw, kmi_configure); 583 584static void 585pl050_kmi_intr(void *arg) 586{ 587 struct kmi_softc *sc = arg; 588 uint32_t c; 589 590 KMI_CTX_LOCK_ASSERT(); 591 592 if ((sc->sc_flags & KMI_FLAG_POLLING) != 0) 593 return; 594 595 if (KBD_IS_ACTIVE(&sc->sc_kbd) && 596 KBD_IS_BUSY(&sc->sc_kbd)) { 597 /* let the callback function process the input */ 598 (sc->sc_kbd.kb_callback.kc_func) (&sc->sc_kbd, KBDIO_KEYINPUT, 599 sc->sc_kbd.kb_callback.kc_arg); 600 } else { 601 /* read and discard the input, no one is waiting for it */ 602 do { 603 c = kmi_read_char_locked(&sc->sc_kbd, 0); 604 } while (c != NOKEY); 605 } 606 607} 608 609static int 610pl050_kmi_probe(device_t dev) 611{ 612 613 if (ofw_bus_is_compatible(dev, "arm,pl050")) { 614 device_set_desc(dev, "PL050 Keyboard/Mouse Interface"); 615 return (BUS_PROBE_DEFAULT); 616 } 617 618 return (ENXIO); 619} 620 621static int 622pl050_kmi_attach(device_t dev) 623{ 624 struct kmi_softc *sc = device_get_softc(dev); 625 keyboard_t *kbd; 626 int rid; 627 int i; 628 629 kbd = &sc->sc_kbd; 630 rid = 0; 631 632 sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 633 if (sc->sc_mem_res == NULL) { 634 device_printf(dev, "could not allocate memory resource\n"); 635 return (ENXIO); 636 } 637 638 /* Request the IRQ resources */ 639 sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); 640 if (sc->sc_irq_res == NULL) { 641 device_printf(dev, "Error: could not allocate irq resources\n"); 642 return (ENXIO); 643 } 644 645 /* Setup and enable the timer */ 646 if (bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_CLK, 647 NULL, pl050_kmi_intr, sc, 648 &sc->sc_intr_hl) != 0) { 649 bus_release_resource(dev, SYS_RES_IRQ, rid, 650 sc->sc_irq_res); 651 device_printf(dev, "Unable to setup the clock irq handler.\n"); 652 return (ENXIO); 653 } 654 655 /* TODO: clock & divisor */ 656 657 pl050_kmi_write_4(sc, KMICR, KMICR_EN | KMICR_RXINTREN); 658 659 kbd_init_struct(kbd, KMI_DRIVER_NAME, KB_OTHER, 660 device_get_unit(dev), 0, 0, 0); 661 kbd->kb_data = (void *)sc; 662 663 sc->sc_keymap = key_map; 664 sc->sc_accmap = accent_map; 665 for (i = 0; i < KMI_NFKEY; i++) { 666 sc->sc_fkeymap[i] = fkey_tab[i]; 667 } 668 669 kbd_set_maps(kbd, &sc->sc_keymap, &sc->sc_accmap, 670 sc->sc_fkeymap, KMI_NFKEY); 671 672 KBD_FOUND_DEVICE(kbd); 673 kmi_clear_state(kbd); 674 KBD_PROBE_DONE(kbd); 675 676 KBD_INIT_DONE(kbd); 677 678 if (kbd_register(kbd) < 0) { 679 goto detach; 680 } 681 KBD_CONFIG_DONE(kbd); 682 683#ifdef KBD_INSTALL_CDEV 684 if (kbd_attach(kbd)) { 685 goto detach; 686 } 687#endif 688 689 if (bootverbose) { 690 genkbd_diag(kbd, bootverbose); 691 } 692 return (0); 693 694detach: 695 return (ENXIO); 696 697} 698 699static device_method_t pl050_kmi_methods[] = { 700 DEVMETHOD(device_probe, pl050_kmi_probe), 701 DEVMETHOD(device_attach, pl050_kmi_attach), 702 { 0, 0 } 703}; 704 705static driver_t pl050_kmi_driver = { 706 "kmi", 707 pl050_kmi_methods, 708 sizeof(struct kmi_softc), 709}; 710 711static devclass_t pl050_kmi_devclass; 712 713DRIVER_MODULE(pl050_kmi, simplebus, pl050_kmi_driver, pl050_kmi_devclass, 0, 0); 714