pcrtc.c revision 178169
1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz and Don Ahn. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 * from: @(#)clock.c 7.2 (Berkeley) 5/12/91 33 */ 34 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD: head/sys/pc98/cbus/pcrtc.c 178169 2008-04-13 06:18:34Z nyan $"); 37 38/* 39 * Routines to handle clock hardware. 40 */ 41 42/* 43 * inittodr, settodr and support routines written 44 * by Christoph Robitschko <chmr@edvz.tu-graz.ac.at> 45 * 46 * reintroduced and updated by Chris Stenton <chris@gnome.co.uk> 8/10/94 47 */ 48 49/* 50 * modified for PC98 by Kakefuda 51 */ 52 53#include "opt_apic.h" 54#include "opt_clock.h" 55#include "opt_isa.h" 56#include "opt_mca.h" 57 58#include <sys/param.h> 59#include <sys/systm.h> 60#include <sys/bus.h> 61#include <sys/clock.h> 62#include <sys/lock.h> 63#include <sys/kdb.h> 64#include <sys/mutex.h> 65#include <sys/proc.h> 66#include <sys/time.h> 67#include <sys/timetc.h> 68#include <sys/kernel.h> 69#include <sys/limits.h> 70#include <sys/module.h> 71#include <sys/sysctl.h> 72#include <sys/power.h> 73 74#include <machine/clock.h> 75#include <machine/cpu.h> 76#include <machine/cputypes.h> 77#include <machine/frame.h> 78#include <machine/intr_machdep.h> 79#include <machine/md_var.h> 80#include <machine/psl.h> 81#ifdef DEV_APIC 82#include <machine/apicvar.h> 83#endif 84#include <machine/specialreg.h> 85#include <machine/ppireg.h> 86#include <machine/timerreg.h> 87 88#include <i386/isa/icu.h> 89#include <pc98/cbus/cbus.h> 90#include <pc98/pc98/pc98_machdep.h> 91#ifdef DEV_ISA 92#include <isa/isavar.h> 93#endif 94 95#define TIMER_DIV(x) ((i8254_freq + (x) / 2) / (x)) 96 97int clkintr_pending; 98int statclock_disable; 99#ifndef TIMER_FREQ 100#define TIMER_FREQ 2457600 101#endif 102u_int i8254_freq = TIMER_FREQ; 103TUNABLE_INT("hw.i8254.freq", &i8254_freq); 104int i8254_max_count; 105static int i8254_real_max_count; 106 107static struct mtx clock_lock; 108static struct intsrc *i8254_intsrc; 109static u_int32_t i8254_lastcount; 110static u_int32_t i8254_offset; 111static int (*i8254_pending)(struct intsrc *); 112static int i8254_ticked; 113static int using_lapic_timer; 114 115/* Values for timerX_state: */ 116#define RELEASED 0 117#define RELEASE_PENDING 1 118#define ACQUIRED 2 119#define ACQUIRE_PENDING 3 120 121static u_char timer1_state; 122 123static unsigned i8254_get_timecount(struct timecounter *tc); 124static unsigned i8254_simple_get_timecount(struct timecounter *tc); 125static void set_i8254_freq(u_int freq, int intr_freq); 126 127static struct timecounter i8254_timecounter = { 128 i8254_get_timecount, /* get_timecount */ 129 0, /* no poll_pps */ 130 ~0u, /* counter_mask */ 131 0, /* frequency */ 132 "i8254", /* name */ 133 0 /* quality */ 134}; 135 136static int 137clkintr(struct trapframe *frame) 138{ 139 140 if (timecounter->tc_get_timecount == i8254_get_timecount) { 141 mtx_lock_spin(&clock_lock); 142 if (i8254_ticked) 143 i8254_ticked = 0; 144 else { 145 i8254_offset += i8254_max_count; 146 i8254_lastcount = 0; 147 } 148 clkintr_pending = 0; 149 mtx_unlock_spin(&clock_lock); 150 } 151 KASSERT(!using_lapic_timer, ("clk interrupt enabled with lapic timer")); 152 hardclock(TRAPF_USERMODE(frame), TRAPF_PC(frame)); 153 return (FILTER_HANDLED); 154} 155 156int 157timer_spkr_acquire(void) 158{ 159 int mode; 160 161 mode = TIMER_SEL1 | TIMER_SQWAVE | TIMER_16BIT; 162 163 if (timer1_state != RELEASED) 164 return (-1); 165 timer1_state = ACQUIRED; 166 167 /* 168 * This access to the timer registers is as atomic as possible 169 * because it is a single instruction. We could do better if we 170 * knew the rate. Use of splclock() limits glitches to 10-100us, 171 * and this is probably good enough for timer2, so we aren't as 172 * careful with it as with timer0. 173 */ 174 outb(TIMER_MODE, TIMER_SEL1 | (mode & 0x3f)); 175 ppi_spkr_on(); /* enable counter1 output to speaker */ 176 177 return (0); 178} 179 180int 181timer_spkr_release(void) 182{ 183 184 if (timer1_state != ACQUIRED) 185 return (-1); 186 timer1_state = RELEASED; 187 outb(TIMER_MODE, TIMER_SEL1 | TIMER_SQWAVE | TIMER_16BIT); 188 ppi_spkr_off(); /* disable counter1 output to speaker */ 189 return (0); 190} 191 192void 193timer_spkr_setfreq(int freq) 194{ 195 196 freq = i8254_freq / freq; 197 mtx_lock_spin(&clock_lock); 198 outb(TIMER_CNTR1, (freq) & 0xff); 199 outb(TIMER_CNTR1, (freq) >> 8); 200 mtx_unlock_spin(&clock_lock); 201} 202 203 204static int 205getit(void) 206{ 207 int high, low; 208 209 mtx_lock_spin(&clock_lock); 210 211 /* Select timer0 and latch counter value. */ 212 outb(TIMER_MODE, TIMER_SEL0 | TIMER_LATCH); 213 214 low = inb(TIMER_CNTR0); 215 high = inb(TIMER_CNTR0); 216 217 mtx_unlock_spin(&clock_lock); 218 return ((high << 8) | low); 219} 220 221/* 222 * Wait "n" microseconds. 223 * Relies on timer 1 counting down from (i8254_freq / hz) 224 * Note: timer had better have been programmed before this is first used! 225 */ 226void 227DELAY(int n) 228{ 229 int delta, prev_tick, tick, ticks_left; 230 231#ifdef DELAYDEBUG 232 int getit_calls = 1; 233 int n1; 234 static int state = 0; 235 236 if (state == 0) { 237 state = 1; 238 for (n1 = 1; n1 <= 10000000; n1 *= 10) 239 DELAY(n1); 240 state = 2; 241 } 242 if (state == 1) 243 printf("DELAY(%d)...", n); 244#endif 245 /* 246 * Read the counter first, so that the rest of the setup overhead is 247 * counted. Guess the initial overhead is 20 usec (on most systems it 248 * takes about 1.5 usec for each of the i/o's in getit(). The loop 249 * takes about 6 usec on a 486/33 and 13 usec on a 386/20. The 250 * multiplications and divisions to scale the count take a while). 251 * 252 * However, if ddb is active then use a fake counter since reading 253 * the i8254 counter involves acquiring a lock. ddb must not do 254 * locking for many reasons, but it calls here for at least atkbd 255 * input. 256 */ 257#ifdef KDB 258 if (kdb_active) 259 prev_tick = 1; 260 else 261#endif 262 prev_tick = getit(); 263 n -= 0; /* XXX actually guess no initial overhead */ 264 /* 265 * Calculate (n * (i8254_freq / 1e6)) without using floating point 266 * and without any avoidable overflows. 267 */ 268 if (n <= 0) 269 ticks_left = 0; 270 else if (n < 256) 271 /* 272 * Use fixed point to avoid a slow division by 1000000. 273 * 39099 = 1193182 * 2^15 / 10^6 rounded to nearest. 274 * 2^15 is the first power of 2 that gives exact results 275 * for n between 0 and 256. 276 */ 277 ticks_left = ((u_int)n * 39099 + (1 << 15) - 1) >> 15; 278 else 279 /* 280 * Don't bother using fixed point, although gcc-2.7.2 281 * generates particularly poor code for the long long 282 * division, since even the slow way will complete long 283 * before the delay is up (unless we're interrupted). 284 */ 285 ticks_left = ((u_int)n * (long long)i8254_freq + 999999) 286 / 1000000; 287 288 while (ticks_left > 0) { 289#ifdef KDB 290 if (kdb_active) { 291 outb(0x5f, 0); 292 tick = prev_tick - 1; 293 if (tick <= 0) 294 tick = i8254_max_count; 295 } else 296#endif 297 tick = getit(); 298#ifdef DELAYDEBUG 299 ++getit_calls; 300#endif 301 delta = prev_tick - tick; 302 prev_tick = tick; 303 if (delta < 0) { 304 delta += i8254_max_count; 305 /* 306 * Guard against i8254_max_count being wrong. 307 * This shouldn't happen in normal operation, 308 * but it may happen if set_i8254_freq() is 309 * traced. 310 */ 311 if (delta < 0) 312 delta = 0; 313 } 314 ticks_left -= delta; 315 } 316#ifdef DELAYDEBUG 317 if (state == 1) 318 printf(" %d calls to getit() at %d usec each\n", 319 getit_calls, (n + 5) / getit_calls); 320#endif 321} 322 323static void 324set_i8254_freq(u_int freq, int intr_freq) 325{ 326 int new_i8254_real_max_count; 327 328 i8254_timecounter.tc_frequency = freq; 329 mtx_lock_spin(&clock_lock); 330 i8254_freq = freq; 331 if (using_lapic_timer) 332 new_i8254_real_max_count = 0x10000; 333 else 334 new_i8254_real_max_count = TIMER_DIV(intr_freq); 335 if (new_i8254_real_max_count != i8254_real_max_count) { 336 i8254_real_max_count = new_i8254_real_max_count; 337 if (i8254_real_max_count == 0x10000) 338 i8254_max_count = 0xffff; 339 else 340 i8254_max_count = i8254_real_max_count; 341 outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT); 342 outb(TIMER_CNTR0, i8254_real_max_count & 0xff); 343 outb(TIMER_CNTR0, i8254_real_max_count >> 8); 344 } 345 mtx_unlock_spin(&clock_lock); 346} 347 348static void 349i8254_restore(void) 350{ 351 352 mtx_lock_spin(&clock_lock); 353 outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT); 354 outb(TIMER_CNTR0, i8254_real_max_count & 0xff); 355 outb(TIMER_CNTR0, i8254_real_max_count >> 8); 356 mtx_unlock_spin(&clock_lock); 357} 358 359 360/* 361 * Restore all the timers non-atomically (XXX: should be atomically). 362 * 363 * This function is called from pmtimer_resume() to restore all the timers. 364 * This should not be necessary, but there are broken laptops that do not 365 * restore all the timers on resume. 366 */ 367void 368timer_restore(void) 369{ 370 371 i8254_restore(); /* restore i8254_freq and hz */ 372} 373 374/* This is separate from startrtclock() so that it can be called early. */ 375void 376i8254_init(void) 377{ 378 379 mtx_init(&clock_lock, "clk", NULL, MTX_SPIN | MTX_NOPROFILE); 380 381 if (pc98_machine_type & M_8M) 382 i8254_freq = 1996800L; /* 1.9968 MHz */ 383 else 384 i8254_freq = 2457600L; /* 2.4576 MHz */ 385 386 set_i8254_freq(i8254_freq, hz); 387} 388 389void 390startrtclock() 391{ 392 393 set_i8254_freq(i8254_freq, hz); 394 tc_init(&i8254_timecounter); 395 396 init_TSC(); 397} 398 399/* 400 * Start both clocks running. 401 */ 402void 403cpu_initclocks() 404{ 405 406#ifdef DEV_APIC 407 using_lapic_timer = lapic_setup_clock(); 408#endif 409 /* 410 * If we aren't using the local APIC timer to drive the kernel 411 * clocks, setup the interrupt handler for the 8254 timer 0 so 412 * that it can drive hardclock(). Otherwise, change the 8254 413 * timecounter to user a simpler algorithm. 414 */ 415 if (!using_lapic_timer) { 416 intr_add_handler("clk", 0, (driver_filter_t *)clkintr, NULL, 417 NULL, INTR_TYPE_CLK, NULL); 418 i8254_intsrc = intr_lookup_source(0); 419 if (i8254_intsrc != NULL) 420 i8254_pending = 421 i8254_intsrc->is_pic->pic_source_pending; 422 } else { 423 i8254_timecounter.tc_get_timecount = 424 i8254_simple_get_timecount; 425 i8254_timecounter.tc_counter_mask = 0xffff; 426 set_i8254_freq(i8254_freq, hz); 427 } 428 429 init_TSC_tc(); 430} 431 432void 433cpu_startprofclock(void) 434{ 435} 436 437void 438cpu_stopprofclock(void) 439{ 440} 441 442static int 443sysctl_machdep_i8254_freq(SYSCTL_HANDLER_ARGS) 444{ 445 int error; 446 u_int freq; 447 448 /* 449 * Use `i8254' instead of `timer' in external names because `timer' 450 * is is too generic. Should use it everywhere. 451 */ 452 freq = i8254_freq; 453 error = sysctl_handle_int(oidp, &freq, 0, req); 454 if (error == 0 && req->newptr != NULL) 455 set_i8254_freq(freq, hz); 456 return (error); 457} 458 459SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW, 460 0, sizeof(u_int), sysctl_machdep_i8254_freq, "IU", ""); 461 462static unsigned 463i8254_simple_get_timecount(struct timecounter *tc) 464{ 465 466 return (i8254_max_count - getit()); 467} 468 469static unsigned 470i8254_get_timecount(struct timecounter *tc) 471{ 472 u_int count; 473 u_int high, low; 474 u_int eflags; 475 476 eflags = read_eflags(); 477 mtx_lock_spin(&clock_lock); 478 479 /* Select timer0 and latch counter value. */ 480 outb(TIMER_MODE, TIMER_SEL0 | TIMER_LATCH); 481 482 low = inb(TIMER_CNTR0); 483 high = inb(TIMER_CNTR0); 484 count = i8254_max_count - ((high << 8) | low); 485 if (count < i8254_lastcount || 486 (!i8254_ticked && (clkintr_pending || 487 ((count < 20 || (!(eflags & PSL_I) && 488 count < i8254_max_count / 2u)) && 489 i8254_pending != NULL && i8254_pending(i8254_intsrc))))) { 490 i8254_ticked = 1; 491 i8254_offset += i8254_max_count; 492 } 493 i8254_lastcount = count; 494 count += i8254_offset; 495 mtx_unlock_spin(&clock_lock); 496 return (count); 497} 498 499#ifdef DEV_ISA 500/* 501 * Attach to the ISA PnP descriptors for the timer 502 */ 503static struct isa_pnp_id attimer_ids[] = { 504 { 0x0001d041 /* PNP0100 */, "AT timer" }, 505 { 0 } 506}; 507 508static int 509attimer_probe(device_t dev) 510{ 511 int result; 512 513 result = ISA_PNP_PROBE(device_get_parent(dev), dev, attimer_ids); 514 if (result <= 0) 515 device_quiet(dev); 516 return(result); 517} 518 519static int 520attimer_attach(device_t dev) 521{ 522 return(0); 523} 524 525static device_method_t attimer_methods[] = { 526 /* Device interface */ 527 DEVMETHOD(device_probe, attimer_probe), 528 DEVMETHOD(device_attach, attimer_attach), 529 DEVMETHOD(device_detach, bus_generic_detach), 530 DEVMETHOD(device_shutdown, bus_generic_shutdown), 531 DEVMETHOD(device_suspend, bus_generic_suspend), 532 DEVMETHOD(device_resume, bus_generic_resume), 533 { 0, 0 } 534}; 535 536static driver_t attimer_driver = { 537 "attimer", 538 attimer_methods, 539 1, /* no softc */ 540}; 541 542static devclass_t attimer_devclass; 543 544DRIVER_MODULE(attimer, isa, attimer_driver, attimer_devclass, 0, 0); 545 546#endif /* DEV_ISA */ 547 548#ifdef DEV_ISA 549 550/********************************************************************** 551 * RTC driver for subr_rtc 552 */ 553 554#include "clock_if.h" 555 556#include <sys/rman.h> 557 558static void rtc_serialcombit(int); 559static void rtc_serialcom(int); 560static int rtc_inb(void); 561static void rtc_outb(int); 562 563static void 564rtc_serialcombit(int i) 565{ 566 outb(IO_RTC, ((i&0x01)<<5)|0x07); 567 DELAY(1); 568 outb(IO_RTC, ((i&0x01)<<5)|0x17); 569 DELAY(1); 570 outb(IO_RTC, ((i&0x01)<<5)|0x07); 571 DELAY(1); 572} 573 574static void 575rtc_serialcom(int i) 576{ 577 rtc_serialcombit(i&0x01); 578 rtc_serialcombit((i&0x02)>>1); 579 rtc_serialcombit((i&0x04)>>2); 580 rtc_serialcombit((i&0x08)>>3); 581 outb(IO_RTC, 0x07); 582 DELAY(1); 583 outb(IO_RTC, 0x0f); 584 DELAY(1); 585 outb(IO_RTC, 0x07); 586 DELAY(1); 587} 588 589static void 590rtc_outb(int val) 591{ 592 int s; 593 int sa = 0; 594 595 for (s=0;s<8;s++) { 596 sa = ((val >> s) & 0x01) ? 0x27 : 0x07; 597 outb(IO_RTC, sa); /* set DI & CLK 0 */ 598 DELAY(1); 599 outb(IO_RTC, sa | 0x10); /* CLK 1 */ 600 DELAY(1); 601 } 602 outb(IO_RTC, sa & 0xef); /* CLK 0 */ 603} 604 605static int 606rtc_inb(void) 607{ 608 int s; 609 int sa = 0; 610 611 for (s=0;s<8;s++) { 612 sa |= ((inb(0x33) & 0x01) << s); 613 outb(IO_RTC, 0x17); /* CLK 1 */ 614 DELAY(1); 615 outb(IO_RTC, 0x07); /* CLK 0 */ 616 DELAY(2); 617 } 618 return sa; 619} 620 621struct pcrtc_softc { 622 int port_rid1, port_rid2; 623 struct resource *port_res1, *port_res2; 624}; 625 626/* 627 * Attach to the ISA PnP descriptors for the timer and realtime clock. 628 */ 629static struct isa_pnp_id pcrtc_ids[] = { 630 { 0x000bd041 /* PNP0B00 */, "AT realtime clock" }, 631 { 0 } 632}; 633 634static int 635pcrtc_probe(device_t dev) 636{ 637 int result; 638 639 device_set_desc(dev, "PC Real Time Clock"); 640 result = ISA_PNP_PROBE(device_get_parent(dev), dev, pcrtc_ids); 641 /* ENXIO if wrong PnP-ID, ENOENT ifno PnP-ID, zero if good PnP-iD */ 642 if (result != ENOENT) 643 return(result); 644 /* All PC's have an RTC, and we're hosed without it, so... */ 645 return (BUS_PROBE_LOW_PRIORITY); 646} 647 648static int 649pcrtc_attach(device_t dev) 650{ 651 struct pcrtc_softc *sc; 652 653 /* 654 * Not that we need them or anything, but grab our resources 655 * so they show up, correctly attributed, in the big picture. 656 */ 657 sc = device_get_softc(dev); 658 sc->port_rid1 = 0; 659 bus_set_resource(dev, SYS_RES_IOPORT, sc->port_rid1, IO_RTC, 1); 660 if (!(sc->port_res1 = bus_alloc_resource(dev, SYS_RES_IOPORT, 661 &sc->port_rid1, IO_RTC, IO_RTC, 1, RF_ACTIVE))) 662 device_printf(dev, "Warning: Couldn't map I/O.\n"); 663 sc->port_rid2 = 1; 664 bus_set_resource(dev, SYS_RES_IOPORT, sc->port_rid2, 0x33, 1); 665 if (!(sc->port_res2 = bus_alloc_resource(dev, SYS_RES_IOPORT, 666 &sc->port_rid2, 0x33, 0x33, 1, RF_ACTIVE))) 667 device_printf(dev, "Warning: Couldn't map I/O.\n"); 668 669 clock_register(dev, 1000000); 670 return(0); 671} 672 673static int 674pcrtc_settime(device_t dev __unused, struct timespec *ts) 675{ 676 struct clocktime ct; 677 678 clock_ts_to_ct(ts, &ct); 679 680 rtc_serialcom(0x01); /* Register shift command. */ 681 682 rtc_outb(bin2bcd(ct.sec)); /* Write back Seconds */ 683 rtc_outb(bin2bcd(ct.min)); /* Write back Minutes */ 684 rtc_outb(bin2bcd(ct.hour)); /* Write back Hours */ 685 686 rtc_outb(bin2bcd(ct.day)); /* Write back Day */ 687 rtc_outb((ct.mon << 4) | ct.dow); /* Write back Month and DOW */ 688 rtc_outb(bin2bcd(ct.year % 100)); /* Write back Year */ 689 690 rtc_serialcom(0x02); /* Time set & Counter hold command. */ 691 rtc_serialcom(0x00); /* Register hold command. */ 692 693 return (0); 694} 695 696static int 697pcrtc_gettime(device_t dev, struct timespec *ts) 698{ 699 struct clocktime ct; 700 int i; 701 702 rtc_serialcom(0x03); /* Time Read */ 703 rtc_serialcom(0x01); /* Register shift command. */ 704 DELAY(20); 705 706 ct.nsec = 0; 707 ct.sec = bcd2bin(rtc_inb() & 0xff); /* sec */ 708 ct.min = bcd2bin(rtc_inb() & 0xff); /* min */ 709 ct.hour = bcd2bin(rtc_inb() & 0xff); /* hour */ 710 ct.day = bcd2bin(rtc_inb() & 0xff); /* date */ 711 i = rtc_inb(); 712 ct.dow = i & 0x0f; /* dow */ 713 ct.mon = (i >> 4) & 0x0f; /* month */ 714 ct.year = bcd2bin(rtc_inb() & 0xff) + 1900; /* year */ 715 if (ct.year < 1995) 716 ct.year += 100; 717 718 /* Set dow = -1 because some clocks don't set it correctly. */ 719 ct.dow = -1; 720 721 return (clock_ct_to_ts(&ct, ts)); 722} 723 724static device_method_t pcrtc_methods[] = { 725 /* Device interface */ 726 DEVMETHOD(device_probe, pcrtc_probe), 727 DEVMETHOD(device_attach, pcrtc_attach), 728 DEVMETHOD(device_detach, bus_generic_detach), 729 DEVMETHOD(device_shutdown, bus_generic_shutdown), 730 DEVMETHOD(device_suspend, bus_generic_suspend), 731 /* XXX stop statclock? */ 732 DEVMETHOD(device_resume, bus_generic_resume), 733 /* XXX restart statclock? */ 734 735 /* clock interface */ 736 DEVMETHOD(clock_gettime, pcrtc_gettime), 737 DEVMETHOD(clock_settime, pcrtc_settime), 738 739 { 0, 0 } 740}; 741 742static driver_t pcrtc_driver = { 743 "pcrtc", 744 pcrtc_methods, 745 sizeof(struct pcrtc_softc), 746}; 747 748static devclass_t pcrtc_devclass; 749 750DRIVER_MODULE(pcrtc, isa, pcrtc_driver, pcrtc_devclass, 0, 0); 751 752#endif /* DEV_ISA */ 753