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/todds1337.h> 55 56 #define DS1337_DEVICE_TYPE "rtc" 57 58 /* 59 * Driver entry routines 60 */ 61 static int todds1337_attach(dev_info_t *, ddi_attach_cmd_t); 62 static int todds1337_detach(dev_info_t *, ddi_detach_cmd_t); 63 static int todds1337_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **); 64 65 /* 66 * tod_ops entry routines 67 */ 68 static timestruc_t todds1337_get(void); 69 static void todds1337_set(timestruc_t); 70 static uint_t todds1337_set_watchdog_timer(uint_t); 71 static uint_t todds1337_clear_watchdog_timer(void); 72 static void todds1337_set_power_alarm(timestruc_t); 73 static void todds1337_clear_power_alarm(void); 74 static int todds1337_setup_prom(); 75 static void todds1337_rele_prom(); 76 static int todds1337_prom_getdate(struct rtc_t *rtc); 77 static int todds1337_prom_setdate(struct rtc_t *rtc); 78 79 /* 80 * Local functions 81 */ 82 static int todds1337_read_rtc(struct rtc_t *); 83 static int todds1337_write_rtc(struct rtc_t *); 84 85 /* Anchor for soft state structure */ 86 static void *ds1337_statep; 87 static int instance = -1; 88 static int todds1337_attach_done = 0; 89 static kmutex_t todds1337_rd_lock; 90 static kmutex_t todds1337_alarm_lock; 91 static ihandle_t todds1337_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 * cp_ops structure 101 */ 102 static struct cb_ops ds1337_cbops = { 103 nodev, /* open */ 104 nodev, /* close */ 105 nodev, /* strategy */ 106 nodev, /* print */ 107 nodev, /* dump */ 108 nodev, /* read */ 109 nodev, /* write */ 110 nodev, /* ioctl */ 111 nodev, /* devmap */ 112 nodev, /* mmap */ 113 nodev, /* segmap */ 114 NULL, /* poll */ 115 ddi_prop_op, /* cb_prop_op */ 116 NULL, /* streamtab */ 117 D_NEW | D_MP, /* Driver compatibility flag */ 118 CB_REV, /* rev */ 119 nodev, /* int (*cb_aread)() */ 120 nodev /* int (*cb_awrite)() */ 121 }; 122 123 /* 124 * dev_ops structure 125 */ 126 static struct dev_ops ds1337_ops = { 127 DEVO_REV, /* devo_rev */ 128 0, /* refcnt - reference cnt always set to 0 */ 129 todds1337_getinfo, /* getinfo - Maybe requred */ 130 nulldev, /* identify */ 131 nulldev, /* probe */ 132 todds1337_attach, /* attach */ 133 todds1337_detach, /* detach */ 134 nodev, /* reset */ 135 &ds1337_cbops, /* cb_ops - ds1337 does not need this(?) */ 136 NULL 137 }; 138 139 static struct modldrv todds1337_modldrv = { 140 &mod_driverops, /* Type of module. This one is a driver */ 141 "tod driver for DS1337 %I%", /* Name of the module. */ 142 &ds1337_ops, /* Pointer to dev_ops */ 143 }; 144 145 /* 146 * Module linkage structure 147 */ 148 static struct modlinkage todds1337_modlinkage = { 149 MODREV_1, 150 &todds1337_modldrv, 151 0 152 }; 153 154 int 155 _init(void) 156 { 157 int error; 158 159 if (strcmp(tod_module_name, "todds1337") == 0) { 160 if ((error = ddi_soft_state_init(&ds1337_statep, 161 sizeof (ds1337_state_t), 0)) != DDI_SUCCESS) { 162 return (error); 163 } 164 165 tod_ops.tod_get = todds1337_get; 166 tod_ops.tod_set = todds1337_set; 167 tod_ops.tod_set_watchdog_timer = todds1337_set_watchdog_timer; 168 tod_ops.tod_clear_watchdog_timer = 169 todds1337_clear_watchdog_timer; 170 tod_ops.tod_set_power_alarm = todds1337_set_power_alarm; 171 tod_ops.tod_clear_power_alarm = todds1337_clear_power_alarm; 172 } 173 174 (void) todds1337_setup_prom(); 175 176 /* 177 * Install the module 178 */ 179 if ((error = mod_install(&todds1337_modlinkage)) != 0) { 180 ddi_soft_state_fini(&ds1337_statep); 181 return (error); 182 } 183 mutex_init(&todds1337_rd_lock, NULL, MUTEX_DEFAULT, NULL); 184 mutex_init(&todds1337_alarm_lock, NULL, MUTEX_DEFAULT, NULL); 185 186 return (0); 187 } 188 189 int 190 _fini(void) 191 { 192 int error = 0; 193 194 if (strcmp(tod_module_name, "todds1337") == 0) { 195 error = EBUSY; 196 } else { 197 if ((error = mod_remove(&todds1337_modlinkage)) == 0) { 198 ddi_soft_state_fini(&ds1337_statep); 199 mutex_destroy(&todds1337_rd_lock); 200 mutex_destroy(&todds1337_alarm_lock); 201 todds1337_rele_prom(); 202 } 203 } 204 205 return (error); 206 } 207 208 int 209 _info(struct modinfo *modinfop) 210 { 211 return (mod_info(&todds1337_modlinkage, modinfop)); 212 } 213 214 /* 215 * cyclical call to get tod. 216 */ 217 static void 218 todds1337_cyclic(void *arg) 219 { 220 221 (void) todds1337_read_rtc((struct rtc_t *)arg); 222 223 } 224 225 /* 226 * register ds1337 client device with i2c services, and 227 * allocate & initialize soft state structure. 228 */ 229 static int 230 todds1337_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 231 { 232 static ds1337_state_t *statep = NULL; 233 i2c_transfer_t *i2c_tp = NULL; 234 uint8_t tempVal = (uint8_t)0; 235 cyc_handler_t cychand; 236 cyc_time_t cyctime; 237 238 switch (cmd) { 239 case DDI_ATTACH: 240 break; 241 case DDI_RESUME: 242 return (DDI_SUCCESS); 243 default: 244 return (DDI_FAILURE); 245 } 246 247 if (instance != -1) { 248 cmn_err(CE_WARN, "todds1337_attach: wrong instance"); 249 return (DDI_FAILURE); 250 } 251 252 instance = ddi_get_instance(dip); 253 254 /* 255 * Allocate soft state structure 256 */ 257 if (ddi_soft_state_zalloc(ds1337_statep, instance) != DDI_SUCCESS) { 258 cmn_err(CE_WARN, "todds1337_attach: cannot allocate soft " 259 "state"); 260 instance = -1; 261 return (DDI_FAILURE); 262 } 263 264 statep = ddi_get_soft_state(ds1337_statep, instance); 265 if (statep == NULL) { 266 cmn_err(CE_WARN, "todds1337_attach: cannot acquire soft " 267 "state"); 268 instance = -1; 269 return (DDI_FAILURE); 270 } 271 272 statep->dip = dip; 273 274 if (i2c_client_register(dip, &statep->ds1337_i2c_hdl) != I2C_SUCCESS) { 275 ddi_soft_state_free(ds1337_statep, instance); 276 cmn_err(CE_WARN, "todds1337_attach: cannot register i2c " 277 "client"); 278 instance = -1; 279 return (DDI_FAILURE); 280 } 281 282 /* check and initialize the oscillator */ 283 284 (void) i2c_transfer_alloc(statep->ds1337_i2c_hdl, 285 &i2c_tp, 1, 1, I2C_SLEEP); 286 i2c_tp->i2c_version = I2C_XFER_REV; 287 i2c_tp->i2c_flags = I2C_WR_RD; 288 i2c_tp->i2c_wbuf[0] = (uchar_t)RTC_STATUS; /* Read Status register */ 289 i2c_tp->i2c_wlen = 1; 290 i2c_tp->i2c_rlen = 1; 291 292 if ((i2c_transfer(statep->ds1337_i2c_hdl, i2c_tp)) != I2C_SUCCESS) { 293 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 294 i2c_client_unregister(statep->ds1337_i2c_hdl); 295 ddi_soft_state_free(ds1337_statep, instance); 296 cmn_err(CE_WARN, "todds1337_attach: failed to read DS1337 " 297 "status register"); 298 instance = -1; 299 return (DDI_FAILURE); 300 } 301 302 tempVal = i2c_tp->i2c_rbuf[0]; 303 304 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 305 306 /* 307 * Check Oscillator and initialize chip if OBP failed to do it 308 */ 309 310 if (tempVal & RTC_CTL_EOSC) { 311 (void) i2c_transfer_alloc(statep->ds1337_i2c_hdl, &i2c_tp, 312 2, 0, I2C_SLEEP); 313 i2c_tp->i2c_version = I2C_XFER_REV; 314 i2c_tp->i2c_flags = I2C_WR; 315 i2c_tp->i2c_wbuf[0] = RTC_CTL; /* Write Control register */ 316 i2c_tp->i2c_wbuf[1] = (uchar_t)(RTC_CTL_RS2 | RTC_CTL_RS1 | 317 RTC_CTL_INTCN); 318 if ((i2c_transfer(statep->ds1337_i2c_hdl, i2c_tp)) 319 != I2C_SUCCESS) { 320 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, 321 i2c_tp); 322 i2c_client_unregister(statep->ds1337_i2c_hdl); 323 ddi_soft_state_free(ds1337_statep, instance); 324 cmn_err(CE_WARN, "todds1337_attach: failed to write " 325 "DS1337 control register"); 326 instance = -1; 327 return (DDI_FAILURE); 328 } 329 330 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 331 332 /* 333 * Now reset the OSF flag in the Status register 334 */ 335 (void) i2c_transfer_alloc(statep->ds1337_i2c_hdl, &i2c_tp, 336 2, 0, I2C_SLEEP); 337 i2c_tp->i2c_version = I2C_XFER_REV; 338 i2c_tp->i2c_flags = I2C_WR; 339 i2c_tp->i2c_wbuf[0] = RTC_STATUS; 340 i2c_tp->i2c_wbuf[1] = (uchar_t)0; 341 if ((i2c_transfer(statep->ds1337_i2c_hdl, i2c_tp)) 342 != I2C_SUCCESS) { 343 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, 344 i2c_tp); 345 i2c_client_unregister(statep->ds1337_i2c_hdl); 346 ddi_soft_state_free(ds1337_statep, instance); 347 cmn_err(CE_WARN, "todds1337_attach: failed to write " 348 "DS1337 status register"); 349 instance = -1; 350 return (DDI_FAILURE); 351 } 352 353 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 354 } 355 356 /* Create a cyclic handler to read TOD */ 357 cychand.cyh_func = todds1337_cyclic; 358 cychand.cyh_arg = &soft_rtc; 359 cychand.cyh_level = CY_LOW_LEVEL; 360 cyctime.cyt_when = 0; 361 cyctime.cyt_interval = i2c_cyclic_timeout; 362 ASSERT(statep->cycid == CYCLIC_NONE); 363 mutex_enter(&cpu_lock); 364 statep->cycid = cyclic_add(&cychand, &cyctime); 365 mutex_exit(&cpu_lock); 366 ASSERT(statep->cycid != CYCLIC_NONE); 367 368 statep->state = TOD_ATTACHED; 369 todds1337_attach_done = 1; 370 ddi_report_dev(dip); 371 372 return (DDI_SUCCESS); 373 } 374 375 /*ARGSUSED*/ 376 static int 377 todds1337_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 378 { 379 /* 380 * Once attached, do not allow detach because the system constantly 381 * calling todds1337_get() to get the time. If the driver is detached 382 * and the system try to get the time, the system will have memory 383 * problem. 384 * 385 */ 386 switch (cmd) { 387 case DDI_SUSPEND: 388 return (DDI_SUCCESS); 389 default: 390 return (DDI_FAILURE); 391 } 392 } 393 394 /* *********************** tod_ops entry points ******************** */ 395 396 /* 397 * Read the current time from the DS1337 chip and convert to UNIX form. 398 * Should be called with tod_clock held. 399 */ 400 401 static timestruc_t 402 todds1337_get(void) 403 { 404 timestruc_t ts; 405 todinfo_t tod; 406 struct rtc_t rtc; 407 408 ASSERT(MUTEX_HELD(&tod_lock)); 409 410 if (sync_clock_once) { 411 (void) todds1337_read_rtc(&soft_rtc); 412 sync_clock_once = 0; 413 } else { 414 tod_fault_reset(); 415 return (hrestime); 416 } 417 418 bcopy(&soft_rtc, &rtc, sizeof (rtc)); 419 420 /* 421 * 00 - 68 = 2000 thru 2068 422 * 69-99 = 1969 thru 1999 423 */ 424 tod.tod_year = rtc.rtc_year; 425 if (rtc.rtc_year <= 68) 426 tod.tod_year += 100; 427 tod.tod_month = rtc.rtc_mon; 428 tod.tod_day = rtc.rtc_dom; 429 tod.tod_dow = rtc.rtc_dow; 430 tod.tod_hour = rtc.rtc_hrs; 431 tod.tod_min = rtc.rtc_min; 432 tod.tod_sec = rtc.rtc_sec; 433 434 ts.tv_sec = tod_to_utc(tod); 435 ts.tv_nsec = 0; 436 return (ts); 437 } 438 439 /* 440 * Program DS1337 with the specified time. 441 * Must be called with tod_lock held. The TOD 442 * chip supports date from 1969-2068 only. We must 443 * reject requests to set date below 1969. 444 */ 445 static void 446 todds1337_set(timestruc_t ts) 447 { 448 struct rtc_t rtc; 449 todinfo_t tod = utc_to_tod(ts.tv_sec); 450 int year; 451 452 453 ASSERT(MUTEX_HELD(&tod_lock)); 454 455 /* 456 * Year is base 1900, valid year range 1969-2068 457 */ 458 if ((tod.tod_year < 69) || (tod.tod_year > 168)) 459 return; 460 461 year = tod.tod_year; 462 if (year >= 100) 463 year -= 100; 464 465 rtc.rtc_year = (uint8_t)year; 466 rtc.rtc_mon = (uint8_t)tod.tod_month; 467 rtc.rtc_dom = (uint8_t)tod.tod_day; 468 rtc.rtc_dow = (uint8_t)tod.tod_dow; 469 rtc.rtc_hrs = (uint8_t)tod.tod_hour; 470 rtc.rtc_min = (uint8_t)tod.tod_min; 471 rtc.rtc_sec = (uint8_t)tod.tod_sec; 472 473 (void) todds1337_write_rtc(&rtc); 474 } 475 476 /* 477 * Program ds1337 registers for alarm to go off at the specified time. 478 * Alarm #1 is used (Alarm #2 stays idle) 479 */ 480 /* ARGSUSED */ 481 static void 482 todds1337_set_power_alarm(timestruc_t ts) 483 { 484 todinfo_t tod; 485 ds1337_state_t *statep = NULL; 486 i2c_transfer_t *i2c_tp = NULL; 487 uint8_t tmpval; 488 489 ASSERT(MUTEX_HELD(&tod_lock)); 490 491 if (!todds1337_attach_done) { 492 cmn_err(CE_WARN, "todds1337: driver not attached"); 493 return; 494 } 495 496 statep = ddi_get_soft_state(ds1337_statep, instance); 497 if (statep == NULL) { 498 cmn_err(CE_WARN, "todds1337: ddi_get_soft_state failed"); 499 return; 500 } 501 502 tod = utc_to_tod(ts.tv_sec); 503 504 /* 505 * i2c_transfe() may block; to avoid locking clock() which 506 * is running in interrupt context at PIL10 we temporarely exit 507 * the tod_mutex and enter alarm lock. Time/date and alarm hardware 508 * have non-interlsecting registers, it is safe to use different locks. 509 */ 510 mutex_exit(&tod_lock); 511 mutex_enter(&todds1337_alarm_lock); 512 513 /* 514 * Disable Power Alarm (A1IE) 515 */ 516 (void) i2c_transfer_alloc(statep->ds1337_i2c_hdl, 517 &i2c_tp, 1, 1, I2C_SLEEP); 518 i2c_tp->i2c_version = I2C_XFER_REV; 519 i2c_tp->i2c_flags = I2C_WR_RD; 520 i2c_tp->i2c_wbuf[0] = (uchar_t)RTC_CTL; /* Read Control register */ 521 522 if ((i2c_transfer(statep->ds1337_i2c_hdl, i2c_tp)) != I2C_SUCCESS) { 523 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 524 cmn_err(CE_WARN, "todds1337_set_power_alarm: failed to read " 525 "DS1337 control register"); 526 mutex_exit(&todds1337_alarm_lock); 527 mutex_enter(&tod_lock); 528 return; 529 } 530 531 tmpval = i2c_tp->i2c_rbuf[0]; 532 533 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 534 535 (void) i2c_transfer_alloc(statep->ds1337_i2c_hdl, 536 &i2c_tp, 2, 0, I2C_SLEEP); 537 i2c_tp->i2c_version = I2C_XFER_REV; 538 i2c_tp->i2c_flags = I2C_WR; 539 i2c_tp->i2c_wbuf[0] = (uchar_t)RTC_CTL; /* Write Control register */ 540 i2c_tp->i2c_wbuf[1] = tmpval & ~RTC_CTL_A1IE; 541 542 if ((i2c_transfer(statep->ds1337_i2c_hdl, i2c_tp)) != I2C_SUCCESS) { 543 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 544 cmn_err(CE_WARN, "todds1337_set_power_alarm: failed to write " 545 "DS1337control register"); 546 mutex_exit(&todds1337_alarm_lock); 547 mutex_enter(&tod_lock); 548 return; 549 } 550 551 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 552 553 554 /* 555 * Write Alarm #1 registers 556 */ 557 558 (void) i2c_transfer_alloc(statep->ds1337_i2c_hdl, 559 &i2c_tp, 5, 0, I2C_SLEEP); 560 i2c_tp->i2c_version = I2C_XFER_REV; 561 i2c_tp->i2c_flags = I2C_WR; 562 i2c_tp->i2c_wbuf[0] = (uchar_t)RTC_ALARM_SEC; /* Alarm #1 Seconds */ 563 i2c_tp->i2c_wbuf[1] = BYTE_TO_BCD(tod.tod_sec); 564 i2c_tp->i2c_wbuf[2] = BYTE_TO_BCD(tod.tod_min); 565 i2c_tp->i2c_wbuf[3] = BYTE_TO_BCD(tod.tod_hour); 566 i2c_tp->i2c_wbuf[4] = BYTE_TO_BCD(tod.tod_day); 567 568 if ((i2c_transfer(statep->ds1337_i2c_hdl, i2c_tp)) != I2C_SUCCESS) { 569 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 570 cmn_err(CE_WARN, "todds1337_set_power_alarm: failed to write " 571 "DS1337 alarm registers"); 572 mutex_exit(&todds1337_alarm_lock); 573 mutex_enter(&tod_lock); 574 return; 575 } 576 577 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 578 579 580 /* 581 * Enable Power Alarm 582 */ 583 (void) i2c_transfer_alloc(statep->ds1337_i2c_hdl, 584 &i2c_tp, 2, 0, I2C_SLEEP); 585 i2c_tp->i2c_version = I2C_XFER_REV; 586 i2c_tp->i2c_flags = I2C_WR; 587 i2c_tp->i2c_wbuf[0] = (uchar_t)RTC_CTL; /* Write Control register */ 588 i2c_tp->i2c_wbuf[1] = tmpval | RTC_CTL_A1IE; 589 590 if ((i2c_transfer(statep->ds1337_i2c_hdl, i2c_tp)) != I2C_SUCCESS) { 591 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 592 cmn_err(CE_WARN, "todds1337_set_power_alarm: failed to enable " 593 "DS1337 alarm"); 594 mutex_exit(&todds1337_alarm_lock); 595 mutex_enter(&tod_lock); 596 return; 597 } 598 599 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 600 601 mutex_exit(&todds1337_alarm_lock); 602 mutex_enter(&tod_lock); 603 } 604 605 /* ARGSUSED */ 606 static void 607 todds1337_clear_power_alarm(void) 608 { 609 ds1337_state_t *statep = NULL; 610 i2c_transfer_t *i2c_tp = NULL; 611 uint8_t tmpval; 612 613 ASSERT(MUTEX_HELD(&tod_lock)); 614 615 if (!todds1337_attach_done) { 616 cmn_err(CE_WARN, "todds1337: driver was not attached"); 617 return; 618 } 619 620 statep = ddi_get_soft_state(ds1337_statep, instance); 621 if (statep == NULL) { 622 cmn_err(CE_WARN, "todds1337: ddi_get_soft_state has failed"); 623 return; 624 } 625 626 /* 627 * i2c_transfe() may block; to avoid locking clock() which 628 * is running in interrupt context at PIL10 we temporarely exit 629 * the tod_mutex and enter alarm lock. Time/date and alarm hardware 630 * have non-interlsecting registers, it is safe to use different locks. 631 */ 632 mutex_exit(&tod_lock); 633 mutex_enter(&todds1337_alarm_lock); 634 635 /* 636 * Disable Alarm #1 Interrupt 637 */ 638 (void) i2c_transfer_alloc(statep->ds1337_i2c_hdl, 639 &i2c_tp, 1, 1, I2C_SLEEP); 640 i2c_tp->i2c_version = I2C_XFER_REV; 641 i2c_tp->i2c_flags = I2C_WR_RD; 642 i2c_tp->i2c_wbuf[0] = (uchar_t)RTC_CTL; /* Read Control register */ 643 644 if ((i2c_transfer(statep->ds1337_i2c_hdl, i2c_tp)) != I2C_SUCCESS) { 645 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 646 cmn_err(CE_WARN, "todds1337_clear_power_alarm: failed to read " 647 "DS1337 control register"); 648 mutex_exit(&todds1337_alarm_lock); 649 mutex_enter(&tod_lock); 650 return; 651 } 652 653 tmpval = i2c_tp->i2c_rbuf[0]; 654 655 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 656 657 (void) i2c_transfer_alloc(statep->ds1337_i2c_hdl, 658 &i2c_tp, 2, 0, I2C_SLEEP); 659 i2c_tp->i2c_version = I2C_XFER_REV; 660 i2c_tp->i2c_flags = I2C_WR; 661 i2c_tp->i2c_wbuf[0] = (uchar_t)RTC_CTL; /* Write Control register */ 662 i2c_tp->i2c_wbuf[1] = tmpval & ~RTC_CTL_A1IE; 663 664 if ((i2c_transfer(statep->ds1337_i2c_hdl, i2c_tp)) != I2C_SUCCESS) { 665 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 666 cmn_err(CE_WARN, "todds1337_clear_power_alarm: failed to write " 667 "DS1337 control register"); 668 mutex_exit(&todds1337_alarm_lock); 669 mutex_enter(&tod_lock); 670 return; 671 } 672 673 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 674 675 /* 676 * Reset Alarm #1 Flag 677 */ 678 (void) i2c_transfer_alloc(statep->ds1337_i2c_hdl, 679 &i2c_tp, 1, 1, I2C_SLEEP); 680 i2c_tp->i2c_version = I2C_XFER_REV; 681 i2c_tp->i2c_flags = I2C_WR_RD; 682 i2c_tp->i2c_wbuf[0] = (uchar_t)RTC_STATUS; /* Read Status register */ 683 684 if ((i2c_transfer(statep->ds1337_i2c_hdl, i2c_tp)) != I2C_SUCCESS) { 685 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 686 cmn_err(CE_WARN, "todds1337_clear_power_alarm: failed to read " 687 "DS1337 status register"); 688 mutex_exit(&todds1337_alarm_lock); 689 mutex_enter(&tod_lock); 690 return; 691 } 692 693 tmpval = i2c_tp->i2c_rbuf[0]; 694 695 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 696 697 (void) i2c_transfer_alloc(statep->ds1337_i2c_hdl, 698 &i2c_tp, 2, 0, I2C_SLEEP); 699 i2c_tp->i2c_version = I2C_XFER_REV; 700 i2c_tp->i2c_flags = I2C_WR; 701 i2c_tp->i2c_wbuf[0] = (uchar_t)RTC_STATUS; /* Write Status register */ 702 i2c_tp->i2c_wbuf[1] = tmpval & ~RTC_STATUS_A1F; 703 704 if ((i2c_transfer(statep->ds1337_i2c_hdl, i2c_tp)) != I2C_SUCCESS) { 705 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 706 cmn_err(CE_WARN, "todds1337_clear_power_alarm: failed to write " 707 "DS1337 status register"); 708 mutex_exit(&todds1337_alarm_lock); 709 mutex_enter(&tod_lock); 710 return; 711 } 712 713 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 714 715 mutex_exit(&todds1337_alarm_lock); 716 mutex_enter(&tod_lock); 717 } 718 719 /* ARGSUSED */ 720 static uint_t 721 todds1337_set_watchdog_timer(uint_t timeoutval) 722 { 723 ASSERT(MUTEX_HELD(&tod_lock)); 724 return (0); 725 } 726 727 /* ARGSUSED */ 728 static uint_t 729 todds1337_clear_watchdog_timer(void) 730 { 731 ASSERT(MUTEX_HELD(&tod_lock)); 732 return (0); 733 } 734 735 /* ********************** Local functions ***************************** */ 736 737 static char tod_read[7] = {-1, -1, -1, -1, -1, -1, -1}; 738 static int 739 todds1337_read_rtc(struct rtc_t *rtc) 740 { 741 static ds1337_state_t *statep = NULL; 742 i2c_transfer_t *i2c_tp = NULL; 743 int i2c_cmd_status = I2C_FAILURE; 744 int counter = 4; 745 746 if (!todds1337_attach_done) { 747 return (todds1337_prom_getdate(rtc)); 748 } 749 750 statep = ddi_get_soft_state(ds1337_statep, instance); 751 if (statep == NULL) { 752 cmn_err(CE_WARN, "todds1337: ddi_get_soft_state failing"); 753 return (DDI_FAILURE); 754 } 755 756 mutex_enter(&todds1337_rd_lock); 757 758 /* 759 * Allocate 1 byte for write buffer and 7 bytes for read buffer to 760 * to accomodate sec, min, hrs, dayOfWeek, dayOfMonth, year 761 */ 762 if ((i2c_transfer_alloc(statep->ds1337_i2c_hdl, &i2c_tp, 1, 763 7, I2C_SLEEP)) != I2C_SUCCESS) { 764 mutex_exit(&todds1337_rd_lock); 765 return (DDI_FAILURE); 766 } 767 768 do { 769 i2c_tp->i2c_version = I2C_XFER_REV; 770 i2c_tp->i2c_flags = I2C_WR_RD; 771 i2c_tp->i2c_wbuf[0] = (uchar_t)RTC_SEC; /* Start from 0x00 */ 772 i2c_tp->i2c_wlen = 1; /* Write one byte address */ 773 i2c_tp->i2c_rlen = 7; /* Read 7 regs */ 774 775 if ((i2c_cmd_status = i2c_transfer(statep->ds1337_i2c_hdl, 776 i2c_tp)) != I2C_SUCCESS) { 777 goto done; 778 } 779 /* for first read, need to get valid data */ 780 while (tod_read[0] == -1 && counter > 0) { 781 /* move data to static buffer */ 782 bcopy(i2c_tp->i2c_rbuf, tod_read, 7); 783 784 /* now read again */ 785 /* Start reading reg from 0x00 */ 786 i2c_tp->i2c_wbuf[0] = (uchar_t)0x00; 787 i2c_tp->i2c_wlen = 1; /* Write one byte address */ 788 i2c_tp->i2c_rlen = 7; /* Read 7 regs */ 789 if ((i2c_cmd_status = i2c_transfer(statep->ds1337_i2c_hdl, 790 i2c_tp)) != I2C_SUCCESS) { 791 goto done; 792 } 793 /* if they are not the same, then read again */ 794 if (bcmp(tod_read, i2c_tp->i2c_rbuf, 7) != 0) { 795 tod_read[0] = -1; 796 counter--; 797 } 798 } 799 800 } while (i2c_tp->i2c_rbuf[0] == 0x59 && 801 /* if seconds register is 0x59 (BCD), add data should match */ 802 bcmp(&tod_read[1], &i2c_tp->i2c_rbuf[1], 6) != 0 && 803 counter-- > 0); 804 805 if (counter < 0) 806 cmn_err(CE_WARN, "i2ctod: TOD Chip failed ??"); 807 808 /* move data to static buffer */ 809 bcopy(i2c_tp->i2c_rbuf, tod_read, 7); 810 811 812 rtc->rtc_year = BCD_TO_BYTE(i2c_tp->i2c_rbuf[6]); 813 rtc->rtc_mon = BCD_TO_BYTE(i2c_tp->i2c_rbuf[5]); 814 rtc->rtc_dom = BCD_TO_BYTE(i2c_tp->i2c_rbuf[4]); 815 rtc->rtc_dow = BCD_TO_BYTE(i2c_tp->i2c_rbuf[3]); 816 rtc->rtc_hrs = BCD_TO_BYTE(i2c_tp->i2c_rbuf[2]); 817 rtc->rtc_min = BCD_TO_BYTE(i2c_tp->i2c_rbuf[1]); 818 rtc->rtc_sec = BCD_TO_BYTE(i2c_tp->i2c_rbuf[0]); 819 820 done: 821 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 822 823 mutex_exit(&todds1337_rd_lock); 824 return (i2c_cmd_status); 825 } 826 827 828 static int 829 todds1337_write_rtc(struct rtc_t *rtc) 830 { 831 ds1337_state_t *statep = NULL; 832 i2c_transfer_t *i2c_tp = NULL; 833 int i2c_cmd_status = I2C_SUCCESS; 834 835 836 if (!todds1337_attach_done) { 837 return (todds1337_prom_setdate(rtc)); 838 } 839 840 statep = ddi_get_soft_state(ds1337_statep, instance); 841 if (statep == NULL) { 842 return (DDI_FAILURE); 843 } 844 845 if ((i2c_cmd_status = i2c_transfer_alloc(statep->ds1337_i2c_hdl, 846 &i2c_tp, 8, 0, I2C_SLEEP)) != I2C_SUCCESS) { 847 return (i2c_cmd_status); 848 } 849 850 i2c_tp->i2c_version = I2C_XFER_REV; 851 i2c_tp->i2c_flags = I2C_WR; 852 i2c_tp->i2c_wbuf[0] = (uchar_t)RTC_SEC; 853 i2c_tp->i2c_wbuf[1] = BYTE_TO_BCD(rtc->rtc_sec); 854 i2c_tp->i2c_wbuf[2] = BYTE_TO_BCD(rtc->rtc_min); 855 i2c_tp->i2c_wbuf[3] = BYTE_TO_BCD(rtc->rtc_hrs); 856 i2c_tp->i2c_wbuf[4] = BYTE_TO_BCD(rtc->rtc_dow); 857 i2c_tp->i2c_wbuf[5] = BYTE_TO_BCD(rtc->rtc_dom); 858 i2c_tp->i2c_wbuf[6] = BYTE_TO_BCD(rtc->rtc_mon); 859 i2c_tp->i2c_wbuf[7] = BYTE_TO_BCD(rtc->rtc_year); 860 i2c_tp->i2c_wlen = 8; 861 862 if ((i2c_cmd_status = i2c_transfer(statep->ds1337_i2c_hdl, 863 i2c_tp)) != I2C_SUCCESS) { 864 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 865 return (i2c_cmd_status); 866 } 867 868 tod_read[0] = -1; /* invalidate saved data from read routine */ 869 870 (void) i2c_transfer_free(statep->ds1337_i2c_hdl, i2c_tp); 871 872 return (i2c_cmd_status); 873 } 874 875 876 /*ARGSUSED*/ 877 static int 878 todds1337_getinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, 879 void **result) 880 { 881 ds1337_state_t *softsp; 882 883 if (instance == -1) { 884 return (DDI_FAILURE); 885 } 886 887 switch (infocmd) { 888 case DDI_INFO_DEVT2DEVINFO: 889 if ((softsp = ddi_get_soft_state(ds1337_statep, instance)) == 890 NULL) 891 return (DDI_FAILURE); 892 *result = (void *)softsp->dip; 893 return (DDI_SUCCESS); 894 case DDI_INFO_DEVT2INSTANCE: 895 *result = (void *)instance; 896 return (DDI_SUCCESS); 897 default: 898 return (DDI_FAILURE); 899 } 900 } 901 902 /* 903 * Finds the device node with device_type "rtc" and opens it to 904 * execute the get-time method 905 */ 906 static int 907 todds1337_setup_prom() 908 { 909 pnode_t todnode; 910 char tod1337_devpath[MAXNAMELEN]; 911 912 if ((todnode = prom_findnode_bydevtype(prom_rootnode(), 913 DS1337_DEVICE_TYPE)) == OBP_NONODE) 914 return (DDI_FAILURE); 915 916 /* 917 * We now have the phandle of the rtc node, we need to open the 918 * node and get the ihandle 919 */ 920 if (prom_phandle_to_path(todnode, tod1337_devpath, 921 sizeof (tod1337_devpath)) < 0) { 922 cmn_err(CE_WARN, "prom_phandle_to_path failed"); 923 return (DDI_FAILURE); 924 } 925 926 /* 927 * Now open the node and store it's ihandle 928 */ 929 if ((todds1337_ihandle = prom_open(tod1337_devpath)) == NULL) { 930 cmn_err(CE_WARN, "prom_open failed"); 931 return (DDI_FAILURE); 932 } 933 934 return (DDI_SUCCESS); 935 } 936 937 /* 938 * Closes the prom interface 939 */ 940 static void 941 todds1337_rele_prom() 942 { 943 (void) prom_close(todds1337_ihandle); 944 } 945 946 /* 947 * Read the date using "get-time" method in rtc node 948 * PROM returns 1969-1999 when reading 69-99 and 949 * 2000-2068 when reading 00-68 950 */ 951 static int 952 todds1337_prom_getdate(struct rtc_t *rtc) 953 { 954 int year; 955 cell_t ci[12]; 956 957 ci[0] = p1275_ptr2cell("call-method"); /* Service name */ 958 ci[1] = 2; /* # of arguments */ 959 ci[2] = 7; /* # of result cells */ 960 ci[3] = p1275_ptr2cell("get-time"); 961 ci[4] = p1275_ihandle2cell(todds1337_ihandle); 962 963 promif_preprom(); 964 (void) p1275_cif_handler(&ci); 965 promif_postprom(); 966 967 year = p1275_cell2int(ci[6]); 968 rtc->rtc_mon = p1275_cell2int(ci[7]); 969 rtc->rtc_dom = p1275_cell2int(ci[8]); 970 rtc->rtc_dow = 0; 971 rtc->rtc_hrs = p1275_cell2int(ci[9]); 972 rtc->rtc_min = p1275_cell2int(ci[10]); 973 rtc->rtc_sec = p1275_cell2int(ci[11]); 974 if (year >= 2000) 975 year -= 2000; 976 else 977 year -= 1900; 978 rtc->rtc_year = year; 979 980 return (DDI_SUCCESS); 981 } 982 983 /* 984 * Read the date using "set-time" method in rtc node 985 * For values 00 - 68, write 2000-2068, and for 69-99, 986 * write 1969-1999 987 */ 988 static int 989 todds1337_prom_setdate(struct rtc_t *rtc) 990 { 991 int year; 992 cell_t ci[12]; 993 994 year = rtc->rtc_year; 995 996 if ((year < 0) || (year > 99)) 997 return (DDI_FAILURE); 998 999 if (year <= 68) 1000 year = rtc->rtc_year + 2000; 1001 else 1002 year = rtc->rtc_year + 1900; 1003 1004 ci[0] = p1275_ptr2cell("call-method"); /* Service name */ 1005 ci[1] = 8; /* # of arguments */ 1006 ci[2] = 0; /* # of result cells */ 1007 ci[3] = p1275_ptr2cell("set-time"); 1008 ci[4] = p1275_ihandle2cell(todds1337_ihandle); 1009 ci[5] = p1275_int2cell(year); 1010 ci[6] = p1275_int2cell(rtc->rtc_mon); 1011 ci[7] = p1275_int2cell(rtc->rtc_dom); 1012 ci[8] = p1275_int2cell(rtc->rtc_hrs); 1013 ci[9] = p1275_int2cell(rtc->rtc_min); 1014 ci[10] = p1275_int2cell(rtc->rtc_sec); 1015 1016 promif_preprom(); 1017 (void) p1275_cif_handler(&ci); 1018 promif_postprom(); 1019 1020 return (DDI_SUCCESS); 1021 } 1022