1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/types.h> 30 #include <sys/conf.h> 31 #include <sys/devops.h> 32 #include <sys/kmem.h> 33 #include <sys/open.h> 34 #include <sys/file.h> 35 #include <sys/note.h> 36 #include <sys/ddi.h> 37 #include <sys/sunddi.h> 38 39 #include <sys/modctl.h> 40 #include <sys/stat.h> 41 #include <sys/clock.h> 42 #include <sys/reboot.h> 43 #include <sys/machsystm.h> 44 #include <sys/poll.h> 45 #include <sys/pbio.h> 46 #include <sys/sysmacros.h> 47 #include <sys/cyclic.h> 48 49 /* Added for prom interface */ 50 #include <sys/promif.h> 51 #include <sys/promimpl.h> 52 53 #include <sys/i2c/misc/i2c_svc.h> 54 #include <sys/todds1307.h> 55 56 #define I2C_DELAY 20000 57 #define DS1307_DEVICE_TYPE "rtc" 58 59 /* 60 * Driver enrty routines 61 */ 62 static int todds1307_attach(dev_info_t *, ddi_attach_cmd_t); 63 static int todds1307_detach(dev_info_t *, ddi_detach_cmd_t); 64 static int todds1307_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **); 65 66 /* 67 * tod_ops entry routines 68 */ 69 static timestruc_t todds1307_get(void); 70 static void todds1307_set(timestruc_t); 71 static uint_t todds1307_set_watchdog_timer(uint_t); 72 static uint_t todds1307_clear_watchdog_timer(void); 73 static void todds1307_set_power_alarm(timestruc_t); 74 static void todds1307_clear_power_alarm(void); 75 static int todds1307_setup_prom(); 76 static void todds1307_rele_prom(); 77 static int todds1307_prom_getdate(struct rtc_t *rtc); 78 static int todds1307_prom_setdate(struct rtc_t *rtc); 79 80 /* 81 * Local functions 82 */ 83 static int todds1307_read_rtc(struct rtc_t *); 84 static int todds1307_write_rtc(struct rtc_t *); 85 86 /* Anchor for soft state structure */ 87 static void *ds1307_statep; 88 static int instance = -1; 89 static int todds1307_attach_done = 0; 90 static kmutex_t todds1307_rd_lock; 91 static ihandle_t todds1307_ihandle = 0; 92 93 /* one second time out */ 94 #define I2c_CYCLIC_TIMEOUT 1000000000 95 uint_t i2c_cyclic_timeout = I2c_CYCLIC_TIMEOUT; 96 static int sync_clock_once = 1; 97 static struct rtc_t soft_rtc; 98 99 /* 100 * For debugging only 101 */ 102 static unsigned char int2bcd(int num); 103 static int bcd2int(unsigned char num); 104 105 /* 106 * cp_ops structure 107 */ 108 static struct cb_ops ds1307_cbops = { 109 nodev, /* open */ 110 nodev, /* close */ 111 nodev, /* strategy */ 112 nodev, /* print */ 113 nodev, /* dump */ 114 nodev, /* read */ 115 nodev, /* write */ 116 nodev, /* ioctl */ 117 nodev, /* devmap */ 118 nodev, /* mmap */ 119 nodev, /* segmap */ 120 NULL, /* poll */ 121 ddi_prop_op, /* cb_prop_op */ 122 NULL, /* streamtab */ 123 D_NEW | D_MP, /* Driver compatibility flag */ 124 CB_REV, /* rev */ 125 nodev, /* int (*cb_aread)() */ 126 nodev /* int (*cb_awrite)() */ 127 }; 128 129 /* 130 * dev_ops structure 131 */ 132 static struct dev_ops ds1307_ops = { 133 DEVO_REV, /* devo_rev */ 134 0, /* refcnt - reference cnt always set to 0 */ 135 todds1307_getinfo, /* getinfo - Maybe requred */ 136 nulldev, /* identify */ 137 nulldev, /* probe */ 138 todds1307_attach, /* attach */ 139 todds1307_detach, /* detach */ 140 nodev, /* reset */ 141 &ds1307_cbops, /* cb_ops - ds1307 does not need this(?) */ 142 NULL 143 }; 144 145 static struct modldrv todds1307_modldrv = { 146 &mod_driverops, /* Type of module. This one is a driver */ 147 "tod driver for DS1307 v%I%", /* Name of the module */ 148 &ds1307_ops, /* Pointer to dev_ops */ 149 }; 150 151 /* 152 * Module linkage structure 153 */ 154 static struct modlinkage todds1307_modlinkage = { 155 MODREV_1, 156 &todds1307_modldrv, 157 0 158 }; 159 160 int 161 _init(void) 162 { 163 int error; 164 165 if (strcmp(tod_module_name, "todds1307") == 0) { 166 if ((error = ddi_soft_state_init(&ds1307_statep, 167 sizeof (ds1307_state_t), 0)) != DDI_SUCCESS) { 168 return (error); 169 } 170 171 tod_ops.tod_get = todds1307_get; 172 tod_ops.tod_set = todds1307_set; 173 tod_ops.tod_set_watchdog_timer = todds1307_set_watchdog_timer; 174 tod_ops.tod_clear_watchdog_timer = 175 todds1307_clear_watchdog_timer; 176 tod_ops.tod_set_power_alarm = todds1307_set_power_alarm; 177 tod_ops.tod_clear_power_alarm = todds1307_clear_power_alarm; 178 } 179 180 (void) todds1307_setup_prom(); 181 182 /* 183 * Install the module 184 */ 185 if ((error = mod_install(&todds1307_modlinkage)) != 0) { 186 ddi_soft_state_fini(&ds1307_statep); 187 return (error); 188 } 189 mutex_init(&todds1307_rd_lock, NULL, MUTEX_DEFAULT, NULL); 190 191 return (0); 192 } 193 194 int 195 _fini(void) 196 { 197 int error = 0; 198 199 if (strcmp(tod_module_name, "todds1307") == 0) { 200 error = EBUSY; 201 } else { 202 if ((error = mod_remove(&todds1307_modlinkage)) == 0) { 203 ddi_soft_state_fini(&ds1307_statep); 204 mutex_destroy(&todds1307_rd_lock); 205 todds1307_rele_prom(); 206 } 207 } 208 209 return (error); 210 } 211 212 int 213 _info(struct modinfo *modinfop) 214 { 215 return (mod_info(&todds1307_modlinkage, modinfop)); 216 } 217 218 /* 219 * cyclical call to get tod. 220 */ 221 static void 222 todds1307_cyclic(void *arg) 223 { 224 225 todds1307_read_rtc((struct rtc_t *)arg); 226 227 } 228 229 /* 230 * register ds1307 client device with i2c services, and 231 * allocate & initialize soft state structure. 232 */ 233 static int 234 todds1307_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 235 { 236 static ds1307_state_t *statep = NULL; 237 i2c_transfer_t *i2c_tp = NULL; 238 uint8_t tempVal = (uint8_t)0; 239 cyc_handler_t cychand; 240 cyc_time_t cyctime; 241 242 switch (cmd) { 243 244 case DDI_ATTACH: 245 break; 246 case DDI_RESUME: 247 return (DDI_SUCCESS); 248 default: 249 return (DDI_FAILURE); 250 } 251 252 if (instance != -1) { 253 return (DDI_FAILURE); 254 } 255 256 instance = ddi_get_instance(dip); 257 258 /* 259 * Allocate soft state structure 260 */ 261 if (ddi_soft_state_zalloc(ds1307_statep, instance) != DDI_SUCCESS) { 262 return (DDI_FAILURE); 263 } 264 265 statep = ddi_get_soft_state(ds1307_statep, instance); 266 if (statep == NULL) { 267 return (DDI_FAILURE); 268 } 269 270 statep->dip = dip; 271 272 if (i2c_client_register(dip, &statep->ds1307_i2c_hdl) != I2C_SUCCESS) { 273 ddi_soft_state_free(ds1307_statep, instance); 274 delay(drv_usectohz(I2C_DELAY)); 275 return (DDI_FAILURE); 276 } 277 278 /* check and initialize the oscillator */ 279 280 (void) i2c_transfer_alloc(statep->ds1307_i2c_hdl, 281 &i2c_tp, 1, 1, I2C_SLEEP); 282 i2c_tp->i2c_version = I2C_XFER_REV; 283 i2c_tp->i2c_flags = I2C_WR_RD; 284 i2c_tp->i2c_wbuf[0] = (uchar_t)0x00; /* Read 00h */ 285 i2c_tp->i2c_wlen = 1; 286 i2c_tp->i2c_rlen = 1; 287 288 if ((i2c_transfer(statep->ds1307_i2c_hdl, i2c_tp)) != I2C_SUCCESS) { 289 (void) i2c_transfer_free(statep->ds1307_i2c_hdl, i2c_tp); 290 ddi_soft_state_free(ds1307_statep, instance); 291 delay(drv_usectohz(I2C_DELAY)); 292 return (DDI_FAILURE); 293 } 294 295 tempVal = i2c_tp->i2c_rbuf[0]; 296 297 (void) i2c_transfer_free(statep->ds1307_i2c_hdl, i2c_tp); 298 299 if (tempVal & 0x80) { /* check Oscillator */ 300 (void) i2c_transfer_alloc(statep->ds1307_i2c_hdl, &i2c_tp, 301 2, 1, I2C_SLEEP); 302 i2c_tp->i2c_version = I2C_XFER_REV; 303 i2c_tp->i2c_flags = I2C_WR; 304 i2c_tp->i2c_wbuf[0] = 0x00; 305 i2c_tp->i2c_wbuf[1] = 306 (uchar_t)(i2c_tp->i2c_rbuf[0]& 0x7f); 307 i2c_tp->i2c_wlen = 2; 308 /* Enable oscillator */ 309 if ((i2c_transfer(statep->ds1307_i2c_hdl, i2c_tp)) 310 != I2C_SUCCESS) { 311 (void) i2c_transfer_free(statep->ds1307_i2c_hdl, 312 i2c_tp); 313 ddi_soft_state_free(ds1307_statep, instance); 314 return (DDI_FAILURE); 315 } 316 (void) i2c_transfer_free(statep->ds1307_i2c_hdl, i2c_tp); 317 } 318 319 /* Create a cyclic handler to read TOD */ 320 cychand.cyh_func = todds1307_cyclic; 321 cychand.cyh_arg = &soft_rtc; 322 cychand.cyh_level = CY_LOW_LEVEL; 323 cyctime.cyt_when = 0; 324 cyctime.cyt_interval = i2c_cyclic_timeout; 325 ASSERT(statep->cycid == CYCLIC_NONE); 326 mutex_enter(&cpu_lock); 327 statep->cycid = cyclic_add(&cychand, &cyctime); 328 mutex_exit(&cpu_lock); 329 ASSERT(statep->cycid != CYCLIC_NONE); 330 331 statep->state = TOD_ATTACHED; 332 todds1307_attach_done = 1; 333 ddi_report_dev(dip); 334 335 return (DDI_SUCCESS); 336 } 337 338 /* 339 * Unregister ds1307 client device with i2c services and free 340 * soft state structure. 341 */ 342 /*ARGSUSED*/ 343 static int 344 todds1307_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 345 { 346 switch (cmd) { 347 348 /* 349 * Once attached, do not allow detach because the system constantly 350 * calling todds1307_get() to get the time. If the driver is detached 351 * and the system try to get the time, the system will have memory 352 * problem. 353 * 354 * ds1307_state_t *statep = NULL; 355 * case DDI_DETACH: 356 * if ((statep = ddi_get_soft_state(ds1307_statep, 357 * instance)) == NULL) { 358 * return (ENOMEM); 359 * } 360 * i2c_client_unregister(statep->ds1307_i2c_hdl); 361 * ddi_soft_state_free(ds1307_statep, instance); 362 * return (DDI_SUCCESS); 363 */ 364 case DDI_SUSPEND: 365 return (DDI_SUCCESS); 366 367 default: 368 return (DDI_FAILURE); 369 } 370 } 371 372 /* *********************** tod_ops entry points ******************** */ 373 374 /* 375 * Read the current time from the DS1307 chip and convert to UNIX form. 376 * Should be called with tod_clock held. 377 */ 378 379 static timestruc_t 380 todds1307_get(void) 381 { 382 timestruc_t ts; 383 todinfo_t tod; 384 struct rtc_t rtc; 385 386 ASSERT(MUTEX_HELD(&tod_lock)); 387 388 if (sync_clock_once) { 389 todds1307_read_rtc(&soft_rtc); 390 sync_clock_once = 0; 391 } else { 392 tod_fault_reset(); 393 return (hrestime); 394 } 395 396 bcopy(&soft_rtc, &rtc, sizeof (rtc)); 397 398 /* 399 * 00 - 68 = 2000 thru 2068 400 * 69-99 = 1969 thru 1999 401 */ 402 tod.tod_year = rtc.rtc_year; 403 if (rtc.rtc_year <= 68) 404 tod.tod_year += 100; 405 tod.tod_month = rtc.rtc_mon; 406 tod.tod_day = rtc.rtc_dom; 407 tod.tod_dow = rtc.rtc_dow; 408 tod.tod_hour = rtc.rtc_hrs; 409 tod.tod_min = rtc.rtc_min; 410 tod.tod_sec = rtc.rtc_sec; 411 412 ts.tv_sec = tod_to_utc(tod); 413 ts.tv_nsec = 0; 414 return (ts); 415 } 416 417 /* 418 * Program DS1307 with the specified time. 419 * Must be called with tod_lock held. The TOD 420 * chip supports date from 1969-2068 only. We must 421 * reject requests to set date below 2000. 422 */ 423 static void 424 todds1307_set(timestruc_t ts) 425 { 426 struct rtc_t rtc; 427 todinfo_t tod = utc_to_tod(ts.tv_sec); 428 int year; 429 430 431 ASSERT(MUTEX_HELD(&tod_lock)); 432 433 /* 434 * Year is base 1900, valid year range 1969-2068 435 */ 436 if ((tod.tod_year < 69) || (tod.tod_year > 168)) 437 return; 438 439 year = tod.tod_year; 440 if (year >= 100) 441 year -= 100; 442 443 rtc.rtc_year = int2bcd(year); 444 rtc.rtc_mon = int2bcd(tod.tod_month); 445 rtc.rtc_dom = int2bcd(tod.tod_day); 446 rtc.rtc_dow = int2bcd(tod.tod_dow); 447 rtc.rtc_hrs = int2bcd(tod.tod_hour); 448 rtc.rtc_min = int2bcd(tod.tod_min); 449 rtc.rtc_sec = int2bcd(tod.tod_sec); 450 451 todds1307_write_rtc(&rtc); 452 } 453 454 /* ARGSUSED */ 455 static void 456 todds1307_set_power_alarm(timestruc_t ts) 457 { 458 ASSERT(MUTEX_HELD(&tod_lock)); 459 } 460 461 /* ARGSUSED */ 462 static void 463 todds1307_clear_power_alarm(void) 464 { 465 ASSERT(MUTEX_HELD(&tod_lock)); 466 } 467 468 /* ARGSUSED */ 469 static uint_t 470 todds1307_set_watchdog_timer(uint_t timeoutval) 471 { 472 ASSERT(MUTEX_HELD(&tod_lock)); 473 return (0); 474 } 475 476 /* ARGSUSED */ 477 static uint_t 478 todds1307_clear_watchdog_timer(void) 479 { 480 ASSERT(MUTEX_HELD(&tod_lock)); 481 return (0); 482 } 483 484 /* ********************** Local functions ***************************** */ 485 486 static char tod_read[7] = {-1, -1, -1, -1, -1, -1, -1}; 487 static int 488 todds1307_read_rtc(struct rtc_t *rtc) 489 { 490 static ds1307_state_t *statep = NULL; 491 i2c_transfer_t *i2c_tp = NULL; 492 int i2c_cmd_status = I2C_FAILURE; 493 int counter = 4; 494 495 if (!todds1307_attach_done) { 496 return (todds1307_prom_getdate(rtc)); 497 } 498 499 statep = ddi_get_soft_state(ds1307_statep, instance); 500 if (statep == NULL) { 501 cmn_err(CE_WARN, "todds1307: ddi_get_soft_state failed"); 502 return (DDI_FAILURE); 503 } 504 505 mutex_enter(&todds1307_rd_lock); 506 507 /* 508 * Allocate 1 byte for write buffer and 7 bytes for read buffer to 509 * to accomodate sec, min, hrs, dayOfWeek, dayOfMonth, year 510 */ 511 if ((i2c_transfer_alloc(statep->ds1307_i2c_hdl, &i2c_tp, 1, 512 7, I2C_SLEEP)) != I2C_SUCCESS) { 513 mutex_exit(&todds1307_rd_lock); 514 return (DDI_FAILURE); 515 } 516 517 do { 518 i2c_tp->i2c_version = I2C_XFER_REV; 519 i2c_tp->i2c_flags = I2C_WR_RD; 520 i2c_tp->i2c_wbuf[0] = (uchar_t)0x00; /* Start from reg 0x00 */ 521 i2c_tp->i2c_wlen = 1; /* Write one byte address */ 522 i2c_tp->i2c_rlen = 7; /* Read 7 regs */ 523 524 if ((i2c_cmd_status = i2c_transfer(statep->ds1307_i2c_hdl, 525 i2c_tp)) != I2C_SUCCESS) { 526 drv_usecwait(I2C_DELAY); 527 goto done; 528 } 529 /* for first read, need to get valid data */ 530 while (tod_read[0] == -1 && counter > 0) { 531 /* move data to static buffer */ 532 bcopy(i2c_tp->i2c_rbuf, tod_read, 7); 533 534 /* now read again */ 535 /* Start reading reg from 0x00 */ 536 i2c_tp->i2c_wbuf[0] = (uchar_t)0x00; 537 i2c_tp->i2c_wlen = 1; /* Write one byte address */ 538 i2c_tp->i2c_rlen = 7; /* Read 7 regs */ 539 if ((i2c_cmd_status = i2c_transfer(statep->ds1307_i2c_hdl, 540 i2c_tp)) != I2C_SUCCESS) { 541 drv_usecwait(I2C_DELAY); 542 goto done; 543 } 544 /* if they are not the same, then read again */ 545 if (bcmp(tod_read, i2c_tp->i2c_rbuf, 7) != 0) { 546 tod_read[0] = -1; 547 counter--; 548 } 549 } 550 551 } while (i2c_tp->i2c_rbuf[0] == 0x59 && 552 /* if seconds register is 0x59 (BCD), add data should match */ 553 bcmp(&tod_read[1], &i2c_tp->i2c_rbuf[1], 6) != 0 && 554 counter-- > 0); 555 556 if (counter < 0) 557 cmn_err(CE_WARN, "i2ctod: TOD Chip failed ??"); 558 559 /* move data to static buffer */ 560 bcopy(i2c_tp->i2c_rbuf, tod_read, 7); 561 562 563 rtc->rtc_year = bcd2int(i2c_tp->i2c_rbuf[6]); 564 rtc->rtc_mon = bcd2int(i2c_tp->i2c_rbuf[5]); 565 rtc->rtc_dom = bcd2int(i2c_tp->i2c_rbuf[4]); 566 rtc->rtc_dow = bcd2int(i2c_tp->i2c_rbuf[3]); 567 rtc->rtc_hrs = bcd2int(i2c_tp->i2c_rbuf[2]); 568 rtc->rtc_min = bcd2int(i2c_tp->i2c_rbuf[1]); 569 rtc->rtc_sec = bcd2int(i2c_tp->i2c_rbuf[0]); 570 571 done: 572 (void) i2c_transfer_free(statep->ds1307_i2c_hdl, i2c_tp); 573 574 mutex_exit(&todds1307_rd_lock); 575 return (i2c_cmd_status); 576 } 577 578 579 static int 580 todds1307_write_rtc(struct rtc_t *rtc) 581 { 582 ds1307_state_t *statep = NULL; 583 i2c_transfer_t *i2c_tp = NULL; 584 int i2c_cmd_status = I2C_SUCCESS; 585 586 587 if (!todds1307_attach_done) { 588 return (todds1307_prom_setdate(rtc)); 589 } 590 591 statep = ddi_get_soft_state(ds1307_statep, instance); 592 if (statep == NULL) { 593 return (DDI_FAILURE); 594 } 595 596 if ((i2c_cmd_status = i2c_transfer_alloc(statep->ds1307_i2c_hdl, 597 &i2c_tp, 8, 0, I2C_SLEEP)) != I2C_SUCCESS) { 598 return (i2c_cmd_status); 599 } 600 601 i2c_tp->i2c_version = I2C_XFER_REV; 602 i2c_tp->i2c_flags = I2C_WR; 603 i2c_tp->i2c_wbuf[0] = (uchar_t)0x00; 604 i2c_tp->i2c_wbuf[1] = rtc->rtc_sec; 605 i2c_tp->i2c_wbuf[2] = rtc->rtc_min; 606 i2c_tp->i2c_wbuf[3] = rtc->rtc_hrs; 607 i2c_tp->i2c_wbuf[4] = rtc->rtc_dow; 608 i2c_tp->i2c_wbuf[5] = rtc->rtc_dom; 609 i2c_tp->i2c_wbuf[6] = rtc->rtc_mon; 610 i2c_tp->i2c_wbuf[7] = rtc->rtc_year; 611 i2c_tp->i2c_wlen = 8; 612 613 if ((i2c_cmd_status = i2c_transfer(statep->ds1307_i2c_hdl, 614 i2c_tp)) != I2C_SUCCESS) { 615 (void) i2c_transfer_free(statep->ds1307_i2c_hdl, i2c_tp); 616 /* delay(drv_usectohz(I2C_DELAY)); */ 617 drv_usecwait(I2C_DELAY); 618 return (i2c_cmd_status); 619 } 620 621 tod_read[0] = -1; /* invalidate saved data from read routine */ 622 623 (void) i2c_transfer_free(statep->ds1307_i2c_hdl, i2c_tp); 624 625 return (i2c_cmd_status); 626 } 627 628 629 /*ARGSUSED*/ 630 static int 631 todds1307_getinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, 632 void **result) 633 { 634 ds1307_state_t *softsp; 635 636 if (instance == -1) { 637 return (DDI_FAILURE); 638 } 639 640 switch (infocmd) { 641 case DDI_INFO_DEVT2DEVINFO: 642 if ((softsp = ddi_get_soft_state(ds1307_statep, instance)) 643 == NULL) 644 return (DDI_FAILURE); 645 *result = (void *)softsp->dip; 646 return (DDI_SUCCESS); 647 648 case DDI_INFO_DEVT2INSTANCE: 649 *result = (void *)(uintptr_t)instance; 650 return (DDI_SUCCESS); 651 652 default: 653 return (DDI_FAILURE); 654 } 655 } 656 657 /* 658 * Conversion functions 659 */ 660 static unsigned char 661 int2bcd(int num) { 662 return (((num / 10) << 4) /* tens BCD digit in high four bits */ 663 + (num % 10)); /* units digit goes in low four bits */ 664 } 665 666 static int 667 bcd2int(unsigned char num) { 668 return (((num >> 4) * 10) /* 10 times high-order four bits */ 669 + (num & 0x0f)); /* plus low-order four bits */ 670 } 671 672 /* 673 * Finds the device node with device_type "rtc" and opens it to 674 * execute the get-time method 675 */ 676 static int 677 todds1307_setup_prom() 678 { 679 dnode_t todnode; 680 char tod1307_devpath[MAXNAMELEN]; 681 682 if ((todnode = prom_findnode_bydevtype(prom_rootnode(), 683 DS1307_DEVICE_TYPE)) == OBP_NONODE) 684 return (DDI_FAILURE); 685 686 /* 687 * We now have the phandle of the rtc node, we need to open the 688 * node and get the ihandle 689 */ 690 if (prom_phandle_to_path(todnode, tod1307_devpath, 691 sizeof (tod1307_devpath)) < 0) { 692 cmn_err(CE_WARN, "prom_phandle_to_path failed"); 693 return (DDI_FAILURE); 694 } 695 696 /* 697 * Now open the node and store it's ihandle 698 */ 699 if ((todds1307_ihandle = prom_open(tod1307_devpath)) == NULL) { 700 cmn_err(CE_WARN, "prom_open failed"); 701 return (DDI_FAILURE); 702 } 703 704 return (DDI_SUCCESS); 705 } 706 707 /* 708 * Closes the prom interface 709 */ 710 static void 711 todds1307_rele_prom() 712 { 713 (void) prom_close(todds1307_ihandle); 714 } 715 716 /* 717 * Read the date using "get-time" method in rtc node 718 * PROM returns 1969-1999 when reading 69-99 and 719 * 2000-2068 when reading 00-68 720 */ 721 static int 722 todds1307_prom_getdate(struct rtc_t *rtc) 723 { 724 int year; 725 cell_t ci[12]; 726 727 ci[0] = p1275_ptr2cell("call-method"); /* Service name */ 728 ci[1] = 2; /* # of arguments */ 729 ci[2] = 7; /* # of result cells */ 730 ci[3] = p1275_ptr2cell("get-time"); 731 ci[4] = p1275_ihandle2cell(todds1307_ihandle); 732 733 promif_preprom(); 734 (void) p1275_cif_handler(&ci); 735 promif_postprom(); 736 737 year = p1275_cell2int(ci[6]); 738 rtc->rtc_mon = p1275_cell2int(ci[7]); 739 rtc->rtc_dom = p1275_cell2int(ci[8]); 740 rtc->rtc_dow = 0; 741 rtc->rtc_hrs = p1275_cell2int(ci[9]); 742 rtc->rtc_min = p1275_cell2int(ci[10]); 743 rtc->rtc_sec = p1275_cell2int(ci[11]); 744 if (year >= 2000) 745 year -= 2000; 746 else 747 year -= 1900; 748 rtc->rtc_year = year; 749 750 return (DDI_SUCCESS); 751 } 752 753 /* 754 * Read the date using "set-time" method in rtc node 755 * For values 00 - 68, write 2000-2068, and for 69-99, 756 * write 1969-1999 757 */ 758 static int 759 todds1307_prom_setdate(struct rtc_t *rtc) 760 { 761 int year; 762 cell_t ci[12]; 763 764 year = rtc->rtc_year; 765 766 if ((year < 0) || (year > 99)) 767 return (DDI_FAILURE); 768 769 if (year <= 68) 770 year = rtc->rtc_year + 2000; 771 else 772 year = rtc->rtc_year + 1900; 773 774 ci[0] = p1275_ptr2cell("call-method"); /* Service name */ 775 ci[1] = 8; /* # of arguments */ 776 ci[2] = 0; /* # of result cells */ 777 ci[3] = p1275_ptr2cell("set-time"); 778 ci[4] = p1275_ihandle2cell(todds1307_ihandle); 779 ci[5] = p1275_int2cell(year); 780 ci[6] = p1275_int2cell(rtc->rtc_mon); 781 ci[7] = p1275_int2cell(rtc->rtc_dom); 782 ci[8] = p1275_int2cell(rtc->rtc_hrs); 783 ci[9] = p1275_int2cell(rtc->rtc_min); 784 ci[10] = p1275_int2cell(rtc->rtc_sec); 785 786 promif_preprom(); 787 (void) p1275_cif_handler(&ci); 788 promif_postprom(); 789 790 return (DDI_SUCCESS); 791 } 792