1 /*- 2 * Copyright (c) 2004 Texas A&M University 3 * All rights reserved. 4 * 5 * Developer: Wm. Daryl Hawkins 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 /* 30 * Intel ICH Watchdog Timer (WDT) driver 31 * 32 * Originally developed by Wm. Daryl Hawkins of Texas A&M 33 * Heavily modified by <des@FreeBSD.org> 34 * 35 * This is a tricky one. The ICH WDT can't be treated as a regular PCI 36 * device as it's actually an integrated function of the ICH LPC interface 37 * bridge. Detection is also awkward, because we can only infer the 38 * presence of the watchdog timer from the fact that the machine has an 39 * ICH chipset, or, on ACPI 2.x systems, by the presence of the 'WDDT' 40 * ACPI table (although this driver does not support the ACPI detection 41 * method). 42 * 43 * There is one slight problem on non-ACPI or ACPI 1.x systems: we have no 44 * way of knowing if the WDT is permanently disabled (either by the BIOS 45 * or in hardware). 46 * 47 * The WDT is programmed through I/O registers in the ACPI I/O space. 48 * Intel swears it's always at offset 0x60, so we use that. 49 * 50 * For details about the ICH WDT, see Intel Application Note AP-725 51 * (document no. 292273-001). The WDT is also described in the individual 52 * chipset datasheets, e.g. Intel82801EB ICH5 / 82801ER ICH5R Datasheet 53 * (document no. 252516-001) sections 9.10 and 9.11. 54 * 55 * ICH6/7/8 support by Takeharu KATO <takeharu1219@ybb.ne.jp> 56 */ 57 58 #include <sys/cdefs.h> 59 __FBSDID("$FreeBSD$"); 60 61 #include <sys/param.h> 62 #include <sys/kernel.h> 63 #include <sys/module.h> 64 #include <sys/systm.h> 65 #include <sys/bus.h> 66 #include <machine/bus.h> 67 #include <sys/rman.h> 68 #include <machine/resource.h> 69 #include <sys/watchdog.h> 70 71 #include <isa/isavar.h> 72 #include <dev/pci/pcivar.h> 73 74 #include <dev/ichwd/ichwd.h> 75 76 static struct ichwd_device ichwd_devices[] = { 77 { DEVICEID_82801AA, "Intel 82801AA watchdog timer", 1 }, 78 { DEVICEID_82801AB, "Intel 82801AB watchdog timer", 1 }, 79 { DEVICEID_82801BA, "Intel 82801BA watchdog timer", 2 }, 80 { DEVICEID_82801BAM, "Intel 82801BAM watchdog timer", 2 }, 81 { DEVICEID_82801CA, "Intel 82801CA watchdog timer", 3 }, 82 { DEVICEID_82801CAM, "Intel 82801CAM watchdog timer", 3 }, 83 { DEVICEID_82801DB, "Intel 82801DB watchdog timer", 4 }, 84 { DEVICEID_82801DBM, "Intel 82801DBM watchdog timer", 4 }, 85 { DEVICEID_82801E, "Intel 82801E watchdog timer", 5 }, 86 { DEVICEID_82801EB, "Intel 82801EB watchdog timer", 5 }, 87 { DEVICEID_82801EBR, "Intel 82801EB/ER watchdog timer", 5 }, 88 { DEVICEID_6300ESB, "Intel 6300ESB watchdog timer", 5 }, 89 { DEVICEID_82801FBR, "Intel 82801FB/FR watchdog timer", 6 }, 90 { DEVICEID_ICH6M, "Intel ICH6M watchdog timer", 6 }, 91 { DEVICEID_ICH6W, "Intel ICH6W watchdog timer", 6 }, 92 { DEVICEID_ICH7, "Intel ICH7 watchdog timer", 7 }, 93 { DEVICEID_ICH7DH, "Intel ICH7DH watchdog timer", 7 }, 94 { DEVICEID_ICH7M, "Intel ICH7M watchdog timer", 7 }, 95 { DEVICEID_ICH7MDH, "Intel ICH7MDH watchdog timer", 7 }, 96 { DEVICEID_NM10, "Intel NM10 watchdog timer", 7 }, 97 { DEVICEID_ICH8, "Intel ICH8 watchdog timer", 8 }, 98 { DEVICEID_ICH8DH, "Intel ICH8DH watchdog timer", 8 }, 99 { DEVICEID_ICH8DO, "Intel ICH8DO watchdog timer", 8 }, 100 { DEVICEID_ICH8M, "Intel ICH8M watchdog timer", 8 }, 101 { DEVICEID_ICH8ME, "Intel ICH8M-E watchdog timer", 8 }, 102 { DEVICEID_63XXESB, "Intel 63XXESB watchdog timer", 8 }, 103 { DEVICEID_ICH9, "Intel ICH9 watchdog timer", 9 }, 104 { DEVICEID_ICH9DH, "Intel ICH9DH watchdog timer", 9 }, 105 { DEVICEID_ICH9DO, "Intel ICH9DO watchdog timer", 9 }, 106 { DEVICEID_ICH9M, "Intel ICH9M watchdog timer", 9 }, 107 { DEVICEID_ICH9ME, "Intel ICH9M-E watchdog timer", 9 }, 108 { DEVICEID_ICH9R, "Intel ICH9R watchdog timer", 9 }, 109 { DEVICEID_ICH10, "Intel ICH10 watchdog timer", 10 }, 110 { DEVICEID_ICH10D, "Intel ICH10D watchdog timer", 10 }, 111 { DEVICEID_ICH10DO, "Intel ICH10DO watchdog timer", 10 }, 112 { DEVICEID_ICH10R, "Intel ICH10R watchdog timer", 10 }, 113 { DEVICEID_PCH, "Intel PCH watchdog timer", 10 }, 114 { DEVICEID_PCHM, "Intel PCH watchdog timer", 10 }, 115 { DEVICEID_P55, "Intel P55 watchdog timer", 10 }, 116 { DEVICEID_PM55, "Intel PM55 watchdog timer", 10 }, 117 { DEVICEID_H55, "Intel H55 watchdog timer", 10 }, 118 { DEVICEID_QM57, "Intel QM57 watchdog timer", 10 }, 119 { DEVICEID_H57, "Intel H57 watchdog timer", 10 }, 120 { DEVICEID_HM55, "Intel HM55 watchdog timer", 10 }, 121 { DEVICEID_Q57, "Intel Q57 watchdog timer", 10 }, 122 { DEVICEID_HM57, "Intel HM57 watchdog timer", 10 }, 123 { DEVICEID_PCHMSFF, "Intel PCHMSFF watchdog timer", 10 }, 124 { DEVICEID_QS57, "Intel QS57 watchdog timer", 10 }, 125 { DEVICEID_3400, "Intel 3400 watchdog timer", 10 }, 126 { DEVICEID_3420, "Intel 3420 watchdog timer", 10 }, 127 { DEVICEID_3450, "Intel 3450 watchdog timer", 10 }, 128 { DEVICEID_CPT0, "Intel Cougar Point watchdog timer", 10 }, 129 { DEVICEID_CPT1, "Intel Cougar Point watchdog timer", 10 }, 130 { DEVICEID_CPT2, "Intel Cougar Point watchdog timer", 10 }, 131 { DEVICEID_CPT3, "Intel Cougar Point watchdog timer", 10 }, 132 { DEVICEID_CPT4, "Intel Cougar Point watchdog timer", 10 }, 133 { DEVICEID_CPT5, "Intel Cougar Point watchdog timer", 10 }, 134 { DEVICEID_CPT6, "Intel Cougar Point watchdog timer", 10 }, 135 { DEVICEID_CPT7, "Intel Cougar Point watchdog timer", 10 }, 136 { DEVICEID_CPT8, "Intel Cougar Point watchdog timer", 10 }, 137 { DEVICEID_CPT9, "Intel Cougar Point watchdog timer", 10 }, 138 { DEVICEID_CPT10, "Intel Cougar Point watchdog timer", 10 }, 139 { DEVICEID_CPT11, "Intel Cougar Point watchdog timer", 10 }, 140 { DEVICEID_CPT12, "Intel Cougar Point watchdog timer", 10 }, 141 { DEVICEID_CPT13, "Intel Cougar Point watchdog timer", 10 }, 142 { DEVICEID_CPT14, "Intel Cougar Point watchdog timer", 10 }, 143 { DEVICEID_CPT15, "Intel Cougar Point watchdog timer", 10 }, 144 { DEVICEID_CPT16, "Intel Cougar Point watchdog timer", 10 }, 145 { DEVICEID_CPT17, "Intel Cougar Point watchdog timer", 10 }, 146 { DEVICEID_CPT18, "Intel Cougar Point watchdog timer", 10 }, 147 { DEVICEID_CPT19, "Intel Cougar Point watchdog timer", 10 }, 148 { DEVICEID_CPT20, "Intel Cougar Point watchdog timer", 10 }, 149 { DEVICEID_CPT21, "Intel Cougar Point watchdog timer", 10 }, 150 { DEVICEID_CPT22, "Intel Cougar Point watchdog timer", 10 }, 151 { DEVICEID_CPT23, "Intel Cougar Point watchdog timer", 10 }, 152 { DEVICEID_CPT23, "Intel Cougar Point watchdog timer", 10 }, 153 { DEVICEID_CPT25, "Intel Cougar Point watchdog timer", 10 }, 154 { DEVICEID_CPT26, "Intel Cougar Point watchdog timer", 10 }, 155 { DEVICEID_CPT27, "Intel Cougar Point watchdog timer", 10 }, 156 { DEVICEID_CPT28, "Intel Cougar Point watchdog timer", 10 }, 157 { DEVICEID_CPT29, "Intel Cougar Point watchdog timer", 10 }, 158 { DEVICEID_CPT30, "Intel Cougar Point watchdog timer", 10 }, 159 { DEVICEID_CPT31, "Intel Cougar Point watchdog timer", 10 }, 160 { DEVICEID_PATSBURG_LPC1, "Intel Patsburg watchdog timer", 10 }, 161 { DEVICEID_PATSBURG_LPC2, "Intel Patsburg watchdog timer", 10 }, 162 { DEVICEID_PPT0, "Intel Panther Point watchdog timer", 10 }, 163 { DEVICEID_PPT1, "Intel Panther Point watchdog timer", 10 }, 164 { DEVICEID_PPT2, "Intel Panther Point watchdog timer", 10 }, 165 { DEVICEID_PPT3, "Intel Panther Point watchdog timer", 10 }, 166 { DEVICEID_PPT4, "Intel Panther Point watchdog timer", 10 }, 167 { DEVICEID_PPT5, "Intel Panther Point watchdog timer", 10 }, 168 { DEVICEID_PPT6, "Intel Panther Point watchdog timer", 10 }, 169 { DEVICEID_PPT7, "Intel Panther Point watchdog timer", 10 }, 170 { DEVICEID_PPT8, "Intel Panther Point watchdog timer", 10 }, 171 { DEVICEID_PPT9, "Intel Panther Point watchdog timer", 10 }, 172 { DEVICEID_PPT10, "Intel Panther Point watchdog timer", 10 }, 173 { DEVICEID_PPT11, "Intel Panther Point watchdog timer", 10 }, 174 { DEVICEID_PPT12, "Intel Panther Point watchdog timer", 10 }, 175 { DEVICEID_PPT13, "Intel Panther Point watchdog timer", 10 }, 176 { DEVICEID_PPT14, "Intel Panther Point watchdog timer", 10 }, 177 { DEVICEID_PPT15, "Intel Panther Point watchdog timer", 10 }, 178 { DEVICEID_PPT16, "Intel Panther Point watchdog timer", 10 }, 179 { DEVICEID_PPT17, "Intel Panther Point watchdog timer", 10 }, 180 { DEVICEID_PPT18, "Intel Panther Point watchdog timer", 10 }, 181 { DEVICEID_PPT19, "Intel Panther Point watchdog timer", 10 }, 182 { DEVICEID_PPT20, "Intel Panther Point watchdog timer", 10 }, 183 { DEVICEID_PPT21, "Intel Panther Point watchdog timer", 10 }, 184 { DEVICEID_PPT22, "Intel Panther Point watchdog timer", 10 }, 185 { DEVICEID_PPT23, "Intel Panther Point watchdog timer", 10 }, 186 { DEVICEID_PPT24, "Intel Panther Point watchdog timer", 10 }, 187 { DEVICEID_PPT25, "Intel Panther Point watchdog timer", 10 }, 188 { DEVICEID_PPT26, "Intel Panther Point watchdog timer", 10 }, 189 { DEVICEID_PPT27, "Intel Panther Point watchdog timer", 10 }, 190 { DEVICEID_PPT28, "Intel Panther Point watchdog timer", 10 }, 191 { DEVICEID_PPT29, "Intel Panther Point watchdog timer", 10 }, 192 { DEVICEID_PPT30, "Intel Panther Point watchdog timer", 10 }, 193 { DEVICEID_PPT31, "Intel Panther Point watchdog timer", 10 }, 194 { DEVICEID_LPT0, "Intel Lynx Point watchdog timer", 10 }, 195 { DEVICEID_LPT1, "Intel Lynx Point watchdog timer", 10 }, 196 { DEVICEID_LPT2, "Intel Lynx Point watchdog timer", 10 }, 197 { DEVICEID_DH89XXCC_LPC, "Intel DH89xxCC watchdog timer", 10 }, 198 { 0, NULL, 0 }, 199 }; 200 201 static devclass_t ichwd_devclass; 202 203 #define ichwd_read_tco_1(sc, off) \ 204 bus_read_1((sc)->tco_res, (off)) 205 #define ichwd_read_tco_2(sc, off) \ 206 bus_read_2((sc)->tco_res, (off)) 207 #define ichwd_read_tco_4(sc, off) \ 208 bus_read_4((sc)->tco_res, (off)) 209 #define ichwd_read_smi_4(sc, off) \ 210 bus_read_4((sc)->smi_res, (off)) 211 #define ichwd_read_gcs_4(sc, off) \ 212 bus_read_4((sc)->gcs_res, (off)) 213 214 #define ichwd_write_tco_1(sc, off, val) \ 215 bus_write_1((sc)->tco_res, (off), (val)) 216 #define ichwd_write_tco_2(sc, off, val) \ 217 bus_write_2((sc)->tco_res, (off), (val)) 218 #define ichwd_write_tco_4(sc, off, val) \ 219 bus_write_4((sc)->tco_res, (off), (val)) 220 #define ichwd_write_smi_4(sc, off, val) \ 221 bus_write_4((sc)->smi_res, (off), (val)) 222 #define ichwd_write_gcs_4(sc, off, val) \ 223 bus_write_4((sc)->gcs_res, (off), (val)) 224 225 #define ichwd_verbose_printf(dev, ...) \ 226 do { \ 227 if (bootverbose) \ 228 device_printf(dev, __VA_ARGS__);\ 229 } while (0) 230 231 /* 232 * Disable the watchdog timeout SMI handler. 233 * 234 * Apparently, some BIOSes install handlers that reset or disable the 235 * watchdog timer instead of resetting the system, so we disable the SMI 236 * (by clearing the SMI_TCO_EN bit of the SMI_EN register) to prevent this 237 * from happening. 238 */ 239 static __inline void 240 ichwd_smi_disable(struct ichwd_softc *sc) 241 { 242 ichwd_write_smi_4(sc, SMI_EN, ichwd_read_smi_4(sc, SMI_EN) & ~SMI_TCO_EN); 243 } 244 245 /* 246 * Enable the watchdog timeout SMI handler. See above for details. 247 */ 248 static __inline void 249 ichwd_smi_enable(struct ichwd_softc *sc) 250 { 251 ichwd_write_smi_4(sc, SMI_EN, ichwd_read_smi_4(sc, SMI_EN) | SMI_TCO_EN); 252 } 253 254 /* 255 * Check if the watchdog SMI triggering is enabled. 256 */ 257 static __inline int 258 ichwd_smi_is_enabled(struct ichwd_softc *sc) 259 { 260 return ((ichwd_read_smi_4(sc, SMI_EN) & SMI_TCO_EN) != 0); 261 } 262 263 /* 264 * Reset the watchdog status bits. 265 */ 266 static __inline void 267 ichwd_sts_reset(struct ichwd_softc *sc) 268 { 269 /* 270 * The watchdog status bits are set to 1 by the hardware to 271 * indicate various conditions. They can be cleared by software 272 * by writing a 1, not a 0. 273 */ 274 ichwd_write_tco_2(sc, TCO1_STS, TCO_TIMEOUT); 275 /* 276 * According to Intel's docs, clearing SECOND_TO_STS and BOOT_STS must 277 * be done in two separate operations. 278 */ 279 ichwd_write_tco_2(sc, TCO2_STS, TCO_SECOND_TO_STS); 280 ichwd_write_tco_2(sc, TCO2_STS, TCO_BOOT_STS); 281 } 282 283 /* 284 * Enable the watchdog timer by clearing the TCO_TMR_HALT bit in the 285 * TCO1_CNT register. This is complicated by the need to preserve bit 9 286 * of that same register, and the requirement that all other bits must be 287 * written back as zero. 288 */ 289 static __inline void 290 ichwd_tmr_enable(struct ichwd_softc *sc) 291 { 292 uint16_t cnt; 293 294 cnt = ichwd_read_tco_2(sc, TCO1_CNT) & TCO_CNT_PRESERVE; 295 ichwd_write_tco_2(sc, TCO1_CNT, cnt & ~TCO_TMR_HALT); 296 sc->active = 1; 297 ichwd_verbose_printf(sc->device, "timer enabled\n"); 298 } 299 300 /* 301 * Disable the watchdog timer. See above for details. 302 */ 303 static __inline void 304 ichwd_tmr_disable(struct ichwd_softc *sc) 305 { 306 uint16_t cnt; 307 308 cnt = ichwd_read_tco_2(sc, TCO1_CNT) & TCO_CNT_PRESERVE; 309 ichwd_write_tco_2(sc, TCO1_CNT, cnt | TCO_TMR_HALT); 310 sc->active = 0; 311 ichwd_verbose_printf(sc->device, "timer disabled\n"); 312 } 313 314 /* 315 * Reload the watchdog timer: writing anything to any of the lower five 316 * bits of the TCO_RLD register reloads the timer from the last value 317 * written to TCO_TMR. 318 */ 319 static __inline void 320 ichwd_tmr_reload(struct ichwd_softc *sc) 321 { 322 if (sc->ich_version <= 5) 323 ichwd_write_tco_1(sc, TCO_RLD, 1); 324 else 325 ichwd_write_tco_2(sc, TCO_RLD, 1); 326 } 327 328 /* 329 * Set the initial timeout value. Note that this must always be followed 330 * by a reload. 331 */ 332 static __inline void 333 ichwd_tmr_set(struct ichwd_softc *sc, unsigned int timeout) 334 { 335 336 if (timeout < TCO_RLD_TMR_MIN) 337 timeout = TCO_RLD_TMR_MIN; 338 339 if (sc->ich_version <= 5) { 340 uint8_t tmr_val8 = ichwd_read_tco_1(sc, TCO_TMR1); 341 342 tmr_val8 &= (~TCO_RLD1_TMR_MAX & 0xff); 343 if (timeout > TCO_RLD1_TMR_MAX) 344 timeout = TCO_RLD1_TMR_MAX; 345 tmr_val8 |= timeout; 346 ichwd_write_tco_1(sc, TCO_TMR1, tmr_val8); 347 } else { 348 uint16_t tmr_val16 = ichwd_read_tco_2(sc, TCO_TMR2); 349 350 tmr_val16 &= (~TCO_RLD2_TMR_MAX & 0xffff); 351 if (timeout > TCO_RLD2_TMR_MAX) 352 timeout = TCO_RLD2_TMR_MAX; 353 tmr_val16 |= timeout; 354 ichwd_write_tco_2(sc, TCO_TMR2, tmr_val16); 355 } 356 357 sc->timeout = timeout; 358 359 ichwd_verbose_printf(sc->device, "timeout set to %u ticks\n", timeout); 360 } 361 362 static __inline int 363 ichwd_clear_noreboot(struct ichwd_softc *sc) 364 { 365 uint32_t status; 366 int rc = 0; 367 368 /* try to clear the NO_REBOOT bit */ 369 if (sc->ich_version <= 5) { 370 status = pci_read_config(sc->ich, ICH_GEN_STA, 1); 371 status &= ~ICH_GEN_STA_NO_REBOOT; 372 pci_write_config(sc->ich, ICH_GEN_STA, status, 1); 373 status = pci_read_config(sc->ich, ICH_GEN_STA, 1); 374 if (status & ICH_GEN_STA_NO_REBOOT) 375 rc = EIO; 376 } else { 377 status = ichwd_read_gcs_4(sc, 0); 378 status &= ~ICH_GCS_NO_REBOOT; 379 ichwd_write_gcs_4(sc, 0, status); 380 status = ichwd_read_gcs_4(sc, 0); 381 if (status & ICH_GCS_NO_REBOOT) 382 rc = EIO; 383 } 384 385 if (rc) 386 device_printf(sc->device, 387 "ICH WDT present but disabled in BIOS or hardware\n"); 388 389 return (rc); 390 } 391 392 /* 393 * Watchdog event handler - called by the framework to enable or disable 394 * the watchdog or change the initial timeout value. 395 */ 396 static void 397 ichwd_event(void *arg, unsigned int cmd, int *error) 398 { 399 struct ichwd_softc *sc = arg; 400 unsigned int timeout; 401 402 /* convert from power-of-two-ns to WDT ticks */ 403 cmd &= WD_INTERVAL; 404 timeout = ((uint64_t)1 << cmd) / ICHWD_TICK; 405 if (cmd) { 406 if (!sc->active) 407 ichwd_tmr_enable(sc); 408 if (timeout != sc->timeout) 409 ichwd_tmr_set(sc, timeout); 410 ichwd_tmr_reload(sc); 411 *error = 0; 412 } else { 413 if (sc->active) 414 ichwd_tmr_disable(sc); 415 } 416 } 417 418 static device_t 419 ichwd_find_ich_lpc_bridge(struct ichwd_device **id_p) 420 { 421 struct ichwd_device *id; 422 device_t ich = NULL; 423 424 /* look for an ICH LPC interface bridge */ 425 for (id = ichwd_devices; id->desc != NULL; ++id) 426 if ((ich = pci_find_device(VENDORID_INTEL, id->device)) != NULL) 427 break; 428 429 if (ich == NULL) 430 return (NULL); 431 432 ichwd_verbose_printf(ich, "found ICH%d or equivalent chipset: %s\n", 433 id->version, id->desc); 434 435 if (id_p) 436 *id_p = id; 437 438 return (ich); 439 } 440 441 /* 442 * Look for an ICH LPC interface bridge. If one is found, register an 443 * ichwd device. There can be only one. 444 */ 445 static void 446 ichwd_identify(driver_t *driver, device_t parent) 447 { 448 struct ichwd_device *id_p; 449 device_t ich = NULL; 450 device_t dev; 451 uint32_t rcba; 452 int rc; 453 454 ich = ichwd_find_ich_lpc_bridge(&id_p); 455 if (ich == NULL) 456 return; 457 458 /* good, add child to bus */ 459 if ((dev = device_find_child(parent, driver->name, 0)) == NULL) 460 dev = BUS_ADD_CHILD(parent, 0, driver->name, 0); 461 462 if (dev == NULL) 463 return; 464 465 device_set_desc_copy(dev, id_p->desc); 466 467 if (id_p->version >= 6) { 468 /* get RCBA (root complex base address) */ 469 rcba = pci_read_config(ich, ICH_RCBA, 4); 470 rc = bus_set_resource(ich, SYS_RES_MEMORY, 0, 471 (rcba & 0xffffc000) + ICH_GCS_OFFSET, ICH_GCS_SIZE); 472 if (rc) 473 ichwd_verbose_printf(dev, 474 "Can not set memory resource for RCBA\n"); 475 } 476 } 477 478 static int 479 ichwd_probe(device_t dev) 480 { 481 482 /* Do not claim some ISA PnP device by accident. */ 483 if (isa_get_logicalid(dev) != 0) 484 return (ENXIO); 485 return (0); 486 } 487 488 static int 489 ichwd_attach(device_t dev) 490 { 491 struct ichwd_softc *sc; 492 struct ichwd_device *id_p; 493 device_t ich; 494 unsigned int pmbase = 0; 495 496 sc = device_get_softc(dev); 497 sc->device = dev; 498 499 ich = ichwd_find_ich_lpc_bridge(&id_p); 500 if (ich == NULL) { 501 device_printf(sc->device, "Can not find ICH device.\n"); 502 goto fail; 503 } 504 sc->ich = ich; 505 sc->ich_version = id_p->version; 506 507 /* get ACPI base address */ 508 pmbase = pci_read_config(ich, ICH_PMBASE, 2) & ICH_PMBASE_MASK; 509 if (pmbase == 0) { 510 device_printf(dev, "ICH PMBASE register is empty\n"); 511 goto fail; 512 } 513 514 /* allocate I/O register space */ 515 sc->smi_rid = 0; 516 sc->smi_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->smi_rid, 517 pmbase + SMI_BASE, pmbase + SMI_BASE + SMI_LEN - 1, SMI_LEN, 518 RF_ACTIVE | RF_SHAREABLE); 519 if (sc->smi_res == NULL) { 520 device_printf(dev, "unable to reserve SMI registers\n"); 521 goto fail; 522 } 523 524 sc->tco_rid = 1; 525 sc->tco_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->tco_rid, 526 pmbase + TCO_BASE, pmbase + TCO_BASE + TCO_LEN - 1, TCO_LEN, 527 RF_ACTIVE | RF_SHAREABLE); 528 if (sc->tco_res == NULL) { 529 device_printf(dev, "unable to reserve TCO registers\n"); 530 goto fail; 531 } 532 533 sc->gcs_rid = 0; 534 if (sc->ich_version >= 6) { 535 sc->gcs_res = bus_alloc_resource_any(ich, SYS_RES_MEMORY, 536 &sc->gcs_rid, RF_ACTIVE|RF_SHAREABLE); 537 if (sc->gcs_res == NULL) { 538 device_printf(dev, "unable to reserve GCS registers\n"); 539 goto fail; 540 } 541 } 542 543 if (ichwd_clear_noreboot(sc) != 0) 544 goto fail; 545 546 ichwd_verbose_printf(dev, "%s (ICH%d or equivalent)\n", 547 device_get_desc(dev), sc->ich_version); 548 549 /* 550 * Determine if we are coming up after a watchdog-induced reset. Some 551 * BIOSes may clear this bit at bootup, preventing us from reporting 552 * this case on such systems. We clear this bit in ichwd_sts_reset(). 553 */ 554 if ((ichwd_read_tco_2(sc, TCO2_STS) & TCO_SECOND_TO_STS) != 0) 555 device_printf(dev, 556 "resuming after hardware watchdog timeout\n"); 557 558 /* reset the watchdog status registers */ 559 ichwd_sts_reset(sc); 560 561 /* make sure the WDT starts out inactive */ 562 ichwd_tmr_disable(sc); 563 564 /* register the watchdog event handler */ 565 sc->ev_tag = EVENTHANDLER_REGISTER(watchdog_list, ichwd_event, sc, 0); 566 567 /* disable the SMI handler */ 568 sc->smi_enabled = ichwd_smi_is_enabled(sc); 569 ichwd_smi_disable(sc); 570 571 return (0); 572 fail: 573 sc = device_get_softc(dev); 574 if (sc->tco_res != NULL) 575 bus_release_resource(dev, SYS_RES_IOPORT, 576 sc->tco_rid, sc->tco_res); 577 if (sc->smi_res != NULL) 578 bus_release_resource(dev, SYS_RES_IOPORT, 579 sc->smi_rid, sc->smi_res); 580 if (sc->gcs_res != NULL) 581 bus_release_resource(ich, SYS_RES_MEMORY, 582 sc->gcs_rid, sc->gcs_res); 583 584 return (ENXIO); 585 } 586 587 static int 588 ichwd_detach(device_t dev) 589 { 590 struct ichwd_softc *sc; 591 device_t ich = NULL; 592 593 sc = device_get_softc(dev); 594 595 /* halt the watchdog timer */ 596 if (sc->active) 597 ichwd_tmr_disable(sc); 598 599 /* enable the SMI handler */ 600 if (sc->smi_enabled != 0) 601 ichwd_smi_enable(sc); 602 603 /* deregister event handler */ 604 if (sc->ev_tag != NULL) 605 EVENTHANDLER_DEREGISTER(watchdog_list, sc->ev_tag); 606 sc->ev_tag = NULL; 607 608 /* reset the watchdog status registers */ 609 ichwd_sts_reset(sc); 610 611 /* deallocate I/O register space */ 612 bus_release_resource(dev, SYS_RES_IOPORT, sc->tco_rid, sc->tco_res); 613 bus_release_resource(dev, SYS_RES_IOPORT, sc->smi_rid, sc->smi_res); 614 615 /* deallocate memory resource */ 616 ich = ichwd_find_ich_lpc_bridge(NULL); 617 if (sc->gcs_res && ich) 618 bus_release_resource(ich, SYS_RES_MEMORY, sc->gcs_rid, sc->gcs_res); 619 620 return (0); 621 } 622 623 static device_method_t ichwd_methods[] = { 624 DEVMETHOD(device_identify, ichwd_identify), 625 DEVMETHOD(device_probe, ichwd_probe), 626 DEVMETHOD(device_attach, ichwd_attach), 627 DEVMETHOD(device_detach, ichwd_detach), 628 DEVMETHOD(device_shutdown, ichwd_detach), 629 {0,0} 630 }; 631 632 static driver_t ichwd_driver = { 633 "ichwd", 634 ichwd_methods, 635 sizeof(struct ichwd_softc), 636 }; 637 638 DRIVER_MODULE(ichwd, isa, ichwd_driver, ichwd_devclass, NULL, NULL); 639