ichwd.c revision 330897
1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2004 Texas A&M University 5 * All rights reserved. 6 * 7 * Developer: Wm. Daryl Hawkins 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31/* 32 * Intel ICH Watchdog Timer (WDT) driver 33 * 34 * Originally developed by Wm. Daryl Hawkins of Texas A&M 35 * Heavily modified by <des@FreeBSD.org> 36 * 37 * This is a tricky one. The ICH WDT can't be treated as a regular PCI 38 * device as it's actually an integrated function of the ICH LPC interface 39 * bridge. Detection is also awkward, because we can only infer the 40 * presence of the watchdog timer from the fact that the machine has an 41 * ICH chipset, or, on ACPI 2.x systems, by the presence of the 'WDDT' 42 * ACPI table (although this driver does not support the ACPI detection 43 * method). 44 * 45 * There is one slight problem on non-ACPI or ACPI 1.x systems: we have no 46 * way of knowing if the WDT is permanently disabled (either by the BIOS 47 * or in hardware). 48 * 49 * The WDT is programmed through I/O registers in the ACPI I/O space. 50 * Intel swears it's always at offset 0x60, so we use that. 51 * 52 * For details about the ICH WDT, see Intel Application Note AP-725 53 * (document no. 292273-001). The WDT is also described in the individual 54 * chipset datasheets, e.g. Intel82801EB ICH5 / 82801ER ICH5R Datasheet 55 * (document no. 252516-001) sections 9.10 and 9.11. 56 * 57 * ICH6/7/8 support by Takeharu KATO <takeharu1219@ybb.ne.jp> 58 * SoC PMC support by Denir Li <denir.li@cas-well.com> 59 */ 60 61#include <sys/cdefs.h> 62__FBSDID("$FreeBSD: stable/11/sys/dev/ichwd/ichwd.c 330897 2018-03-14 03:19:51Z eadler $"); 63 64#include <sys/param.h> 65#include <sys/kernel.h> 66#include <sys/module.h> 67#include <sys/systm.h> 68#include <sys/bus.h> 69#include <machine/bus.h> 70#include <sys/rman.h> 71#include <machine/resource.h> 72#include <sys/watchdog.h> 73 74#include <isa/isavar.h> 75#include <dev/pci/pcivar.h> 76 77#include <dev/ichwd/ichwd.h> 78 79static struct ichwd_device ichwd_devices[] = { 80 { DEVICEID_82801AA, "Intel 82801AA watchdog timer", 1, 1 }, 81 { DEVICEID_82801AB, "Intel 82801AB watchdog timer", 1, 1 }, 82 { DEVICEID_82801BA, "Intel 82801BA watchdog timer", 2, 1 }, 83 { DEVICEID_82801BAM, "Intel 82801BAM watchdog timer", 2, 1 }, 84 { DEVICEID_82801CA, "Intel 82801CA watchdog timer", 3, 1 }, 85 { DEVICEID_82801CAM, "Intel 82801CAM watchdog timer", 3, 1 }, 86 { DEVICEID_82801DB, "Intel 82801DB watchdog timer", 4, 1 }, 87 { DEVICEID_82801DBM, "Intel 82801DBM watchdog timer", 4, 1 }, 88 { DEVICEID_82801E, "Intel 82801E watchdog timer", 5, 1 }, 89 { DEVICEID_82801EB, "Intel 82801EB watchdog timer", 5, 1 }, 90 { DEVICEID_82801EBR, "Intel 82801EB/ER watchdog timer", 5, 1 }, 91 { DEVICEID_6300ESB, "Intel 6300ESB watchdog timer", 5, 1 }, 92 { DEVICEID_82801FBR, "Intel 82801FB/FR watchdog timer", 6, 2 }, 93 { DEVICEID_ICH6M, "Intel ICH6M watchdog timer", 6, 2 }, 94 { DEVICEID_ICH6W, "Intel ICH6W watchdog timer", 6, 2 }, 95 { DEVICEID_ICH7, "Intel ICH7 watchdog timer", 7, 2 }, 96 { DEVICEID_ICH7DH, "Intel ICH7DH watchdog timer", 7, 2 }, 97 { DEVICEID_ICH7M, "Intel ICH7M watchdog timer", 7, 2 }, 98 { DEVICEID_ICH7MDH, "Intel ICH7MDH watchdog timer", 7, 2 }, 99 { DEVICEID_NM10, "Intel NM10 watchdog timer", 7, 2 }, 100 { DEVICEID_ICH8, "Intel ICH8 watchdog timer", 8, 2 }, 101 { DEVICEID_ICH8DH, "Intel ICH8DH watchdog timer", 8, 2 }, 102 { DEVICEID_ICH8DO, "Intel ICH8DO watchdog timer", 8, 2 }, 103 { DEVICEID_ICH8M, "Intel ICH8M watchdog timer", 8, 2 }, 104 { DEVICEID_ICH8ME, "Intel ICH8M-E watchdog timer", 8, 2 }, 105 { DEVICEID_63XXESB, "Intel 63XXESB watchdog timer", 8, 2 }, 106 { DEVICEID_ICH9, "Intel ICH9 watchdog timer", 9, 2 }, 107 { DEVICEID_ICH9DH, "Intel ICH9DH watchdog timer", 9, 2 }, 108 { DEVICEID_ICH9DO, "Intel ICH9DO watchdog timer", 9, 2 }, 109 { DEVICEID_ICH9M, "Intel ICH9M watchdog timer", 9, 2 }, 110 { DEVICEID_ICH9ME, "Intel ICH9M-E watchdog timer", 9, 2 }, 111 { DEVICEID_ICH9R, "Intel ICH9R watchdog timer", 9, 2 }, 112 { DEVICEID_ICH10, "Intel ICH10 watchdog timer", 10, 2 }, 113 { DEVICEID_ICH10D, "Intel ICH10D watchdog timer", 10, 2 }, 114 { DEVICEID_ICH10DO, "Intel ICH10DO watchdog timer", 10, 2 }, 115 { DEVICEID_ICH10R, "Intel ICH10R watchdog timer", 10, 2 }, 116 { DEVICEID_PCH, "Intel PCH watchdog timer", 10, 2 }, 117 { DEVICEID_PCHM, "Intel PCH watchdog timer", 10, 2 }, 118 { DEVICEID_P55, "Intel P55 watchdog timer", 10, 2 }, 119 { DEVICEID_PM55, "Intel PM55 watchdog timer", 10, 2 }, 120 { DEVICEID_H55, "Intel H55 watchdog timer", 10, 2 }, 121 { DEVICEID_QM57, "Intel QM57 watchdog timer", 10, 2 }, 122 { DEVICEID_H57, "Intel H57 watchdog timer", 10, 2 }, 123 { DEVICEID_HM55, "Intel HM55 watchdog timer", 10, 2 }, 124 { DEVICEID_Q57, "Intel Q57 watchdog timer", 10, 2 }, 125 { DEVICEID_HM57, "Intel HM57 watchdog timer", 10, 2 }, 126 { DEVICEID_PCHMSFF, "Intel PCHMSFF watchdog timer", 10, 2 }, 127 { DEVICEID_QS57, "Intel QS57 watchdog timer", 10, 2 }, 128 { DEVICEID_3400, "Intel 3400 watchdog timer", 10, 2 }, 129 { DEVICEID_3420, "Intel 3420 watchdog timer", 10, 2 }, 130 { DEVICEID_3450, "Intel 3450 watchdog timer", 10, 2 }, 131 { DEVICEID_CPT0, "Intel Cougar Point watchdog timer", 10, 2 }, 132 { DEVICEID_CPT1, "Intel Cougar Point watchdog timer", 10, 2 }, 133 { DEVICEID_CPT2, "Intel Cougar Point watchdog timer", 10, 2 }, 134 { DEVICEID_CPT3, "Intel Cougar Point watchdog timer", 10, 2 }, 135 { DEVICEID_CPT4, "Intel Cougar Point watchdog timer", 10, 2 }, 136 { DEVICEID_CPT5, "Intel Cougar Point watchdog timer", 10, 2 }, 137 { DEVICEID_CPT6, "Intel Cougar Point watchdog timer", 10, 2 }, 138 { DEVICEID_CPT7, "Intel Cougar Point watchdog timer", 10, 2 }, 139 { DEVICEID_CPT8, "Intel Cougar Point watchdog timer", 10, 2 }, 140 { DEVICEID_CPT9, "Intel Cougar Point watchdog timer", 10, 2 }, 141 { DEVICEID_CPT10, "Intel Cougar Point watchdog timer", 10, 2 }, 142 { DEVICEID_CPT11, "Intel Cougar Point watchdog timer", 10, 2 }, 143 { DEVICEID_CPT12, "Intel Cougar Point watchdog timer", 10, 2 }, 144 { DEVICEID_CPT13, "Intel Cougar Point watchdog timer", 10, 2 }, 145 { DEVICEID_CPT14, "Intel Cougar Point watchdog timer", 10, 2 }, 146 { DEVICEID_CPT15, "Intel Cougar Point watchdog timer", 10, 2 }, 147 { DEVICEID_CPT16, "Intel Cougar Point watchdog timer", 10, 2 }, 148 { DEVICEID_CPT17, "Intel Cougar Point watchdog timer", 10, 2 }, 149 { DEVICEID_CPT18, "Intel Cougar Point watchdog timer", 10, 2 }, 150 { DEVICEID_CPT19, "Intel Cougar Point watchdog timer", 10, 2 }, 151 { DEVICEID_CPT20, "Intel Cougar Point watchdog timer", 10, 2 }, 152 { DEVICEID_CPT21, "Intel Cougar Point watchdog timer", 10, 2 }, 153 { DEVICEID_CPT22, "Intel Cougar Point watchdog timer", 10, 2 }, 154 { DEVICEID_CPT23, "Intel Cougar Point watchdog timer", 10, 2 }, 155 { DEVICEID_CPT24, "Intel Cougar Point watchdog timer", 10, 2 }, 156 { DEVICEID_CPT25, "Intel Cougar Point watchdog timer", 10, 2 }, 157 { DEVICEID_CPT26, "Intel Cougar Point watchdog timer", 10, 2 }, 158 { DEVICEID_CPT27, "Intel Cougar Point watchdog timer", 10, 2 }, 159 { DEVICEID_CPT28, "Intel Cougar Point watchdog timer", 10, 2 }, 160 { DEVICEID_CPT29, "Intel Cougar Point watchdog timer", 10, 2 }, 161 { DEVICEID_CPT30, "Intel Cougar Point watchdog timer", 10, 2 }, 162 { DEVICEID_CPT31, "Intel Cougar Point watchdog timer", 10, 2 }, 163 { DEVICEID_PATSBURG_LPC1, "Intel Patsburg watchdog timer", 10, 2 }, 164 { DEVICEID_PATSBURG_LPC2, "Intel Patsburg watchdog timer", 10, 2 }, 165 { DEVICEID_PPT0, "Intel Panther Point watchdog timer", 10, 2 }, 166 { DEVICEID_PPT1, "Intel Panther Point watchdog timer", 10, 2 }, 167 { DEVICEID_PPT2, "Intel Panther Point watchdog timer", 10, 2 }, 168 { DEVICEID_PPT3, "Intel Panther Point watchdog timer", 10, 2 }, 169 { DEVICEID_PPT4, "Intel Panther Point watchdog timer", 10, 2 }, 170 { DEVICEID_PPT5, "Intel Panther Point watchdog timer", 10, 2 }, 171 { DEVICEID_PPT6, "Intel Panther Point watchdog timer", 10, 2 }, 172 { DEVICEID_PPT7, "Intel Panther Point watchdog timer", 10, 2 }, 173 { DEVICEID_PPT8, "Intel Panther Point watchdog timer", 10, 2 }, 174 { DEVICEID_PPT9, "Intel Panther Point watchdog timer", 10, 2 }, 175 { DEVICEID_PPT10, "Intel Panther Point watchdog timer", 10, 2 }, 176 { DEVICEID_PPT11, "Intel Panther Point watchdog timer", 10, 2 }, 177 { DEVICEID_PPT12, "Intel Panther Point watchdog timer", 10, 2 }, 178 { DEVICEID_PPT13, "Intel Panther Point watchdog timer", 10, 2 }, 179 { DEVICEID_PPT14, "Intel Panther Point watchdog timer", 10, 2 }, 180 { DEVICEID_PPT15, "Intel Panther Point watchdog timer", 10, 2 }, 181 { DEVICEID_PPT16, "Intel Panther Point watchdog timer", 10, 2 }, 182 { DEVICEID_PPT17, "Intel Panther Point watchdog timer", 10, 2 }, 183 { DEVICEID_PPT18, "Intel Panther Point watchdog timer", 10, 2 }, 184 { DEVICEID_PPT19, "Intel Panther Point watchdog timer", 10, 2 }, 185 { DEVICEID_PPT20, "Intel Panther Point watchdog timer", 10, 2 }, 186 { DEVICEID_PPT21, "Intel Panther Point watchdog timer", 10, 2 }, 187 { DEVICEID_PPT22, "Intel Panther Point watchdog timer", 10, 2 }, 188 { DEVICEID_PPT23, "Intel Panther Point watchdog timer", 10, 2 }, 189 { DEVICEID_PPT24, "Intel Panther Point watchdog timer", 10, 2 }, 190 { DEVICEID_PPT25, "Intel Panther Point watchdog timer", 10, 2 }, 191 { DEVICEID_PPT26, "Intel Panther Point watchdog timer", 10, 2 }, 192 { DEVICEID_PPT27, "Intel Panther Point watchdog timer", 10, 2 }, 193 { DEVICEID_PPT28, "Intel Panther Point watchdog timer", 10, 2 }, 194 { DEVICEID_PPT29, "Intel Panther Point watchdog timer", 10, 2 }, 195 { DEVICEID_PPT30, "Intel Panther Point watchdog timer", 10, 2 }, 196 { DEVICEID_PPT31, "Intel Panther Point watchdog timer", 10, 2 }, 197 { DEVICEID_LPT0, "Intel Lynx Point watchdog timer", 10, 2 }, 198 { DEVICEID_LPT1, "Intel Lynx Point watchdog timer", 10, 2 }, 199 { DEVICEID_LPT2, "Intel Lynx Point watchdog timer", 10, 2 }, 200 { DEVICEID_LPT3, "Intel Lynx Point watchdog timer", 10, 2 }, 201 { DEVICEID_LPT4, "Intel Lynx Point watchdog timer", 10, 2 }, 202 { DEVICEID_LPT5, "Intel Lynx Point watchdog timer", 10, 2 }, 203 { DEVICEID_LPT6, "Intel Lynx Point watchdog timer", 10, 2 }, 204 { DEVICEID_LPT7, "Intel Lynx Point watchdog timer", 10, 2 }, 205 { DEVICEID_LPT8, "Intel Lynx Point watchdog timer", 10, 2 }, 206 { DEVICEID_LPT9, "Intel Lynx Point watchdog timer", 10, 2 }, 207 { DEVICEID_LPT10, "Intel Lynx Point watchdog timer", 10, 2 }, 208 { DEVICEID_LPT11, "Intel Lynx Point watchdog timer", 10, 2 }, 209 { DEVICEID_LPT12, "Intel Lynx Point watchdog timer", 10, 2 }, 210 { DEVICEID_LPT13, "Intel Lynx Point watchdog timer", 10, 2 }, 211 { DEVICEID_LPT14, "Intel Lynx Point watchdog timer", 10, 2 }, 212 { DEVICEID_LPT15, "Intel Lynx Point watchdog timer", 10, 2 }, 213 { DEVICEID_LPT16, "Intel Lynx Point watchdog timer", 10, 2 }, 214 { DEVICEID_LPT17, "Intel Lynx Point watchdog timer", 10, 2 }, 215 { DEVICEID_LPT18, "Intel Lynx Point watchdog timer", 10, 2 }, 216 { DEVICEID_LPT19, "Intel Lynx Point watchdog timer", 10, 2 }, 217 { DEVICEID_LPT20, "Intel Lynx Point watchdog timer", 10, 2 }, 218 { DEVICEID_LPT21, "Intel Lynx Point watchdog timer", 10, 2 }, 219 { DEVICEID_LPT22, "Intel Lynx Point watchdog timer", 10, 2 }, 220 { DEVICEID_LPT23, "Intel Lynx Point watchdog timer", 10, 2 }, 221 { DEVICEID_LPT24, "Intel Lynx Point watchdog timer", 10, 2 }, 222 { DEVICEID_LPT25, "Intel Lynx Point watchdog timer", 10, 2 }, 223 { DEVICEID_LPT26, "Intel Lynx Point watchdog timer", 10, 2 }, 224 { DEVICEID_LPT27, "Intel Lynx Point watchdog timer", 10, 2 }, 225 { DEVICEID_LPT28, "Intel Lynx Point watchdog timer", 10, 2 }, 226 { DEVICEID_LPT29, "Intel Lynx Point watchdog timer", 10, 2 }, 227 { DEVICEID_LPT30, "Intel Lynx Point watchdog timer", 10, 2 }, 228 { DEVICEID_LPT31, "Intel Lynx Point watchdog timer", 10, 2 }, 229 { DEVICEID_WCPT1, "Intel Wildcat Point watchdog timer", 10, 2 }, 230 { DEVICEID_WCPT2, "Intel Wildcat Point watchdog timer", 10, 2 }, 231 { DEVICEID_WCPT3, "Intel Wildcat Point watchdog timer", 10, 2 }, 232 { DEVICEID_WCPT4, "Intel Wildcat Point watchdog timer", 10, 2 }, 233 { DEVICEID_WCPT6, "Intel Wildcat Point watchdog timer", 10, 2 }, 234 { DEVICEID_WBG0, "Intel Wellsburg watchdog timer", 10, 2 }, 235 { DEVICEID_WBG1, "Intel Wellsburg watchdog timer", 10, 2 }, 236 { DEVICEID_WBG2, "Intel Wellsburg watchdog timer", 10, 2 }, 237 { DEVICEID_WBG3, "Intel Wellsburg watchdog timer", 10, 2 }, 238 { DEVICEID_WBG4, "Intel Wellsburg watchdog timer", 10, 2 }, 239 { DEVICEID_WBG5, "Intel Wellsburg watchdog timer", 10, 2 }, 240 { DEVICEID_WBG6, "Intel Wellsburg watchdog timer", 10, 2 }, 241 { DEVICEID_WBG7, "Intel Wellsburg watchdog timer", 10, 2 }, 242 { DEVICEID_WBG8, "Intel Wellsburg watchdog timer", 10, 2 }, 243 { DEVICEID_WBG9, "Intel Wellsburg watchdog timer", 10, 2 }, 244 { DEVICEID_WBG10, "Intel Wellsburg watchdog timer", 10, 2 }, 245 { DEVICEID_WBG11, "Intel Wellsburg watchdog timer", 10, 2 }, 246 { DEVICEID_WBG12, "Intel Wellsburg watchdog timer", 10, 2 }, 247 { DEVICEID_WBG13, "Intel Wellsburg watchdog timer", 10, 2 }, 248 { DEVICEID_WBG14, "Intel Wellsburg watchdog timer", 10, 2 }, 249 { DEVICEID_WBG15, "Intel Wellsburg watchdog timer", 10, 2 }, 250 { DEVICEID_WBG16, "Intel Wellsburg watchdog timer", 10, 2 }, 251 { DEVICEID_WBG17, "Intel Wellsburg watchdog timer", 10, 2 }, 252 { DEVICEID_WBG18, "Intel Wellsburg watchdog timer", 10, 2 }, 253 { DEVICEID_WBG19, "Intel Wellsburg watchdog timer", 10, 2 }, 254 { DEVICEID_WBG20, "Intel Wellsburg watchdog timer", 10, 2 }, 255 { DEVICEID_WBG21, "Intel Wellsburg watchdog timer", 10, 2 }, 256 { DEVICEID_WBG22, "Intel Wellsburg watchdog timer", 10, 2 }, 257 { DEVICEID_WBG23, "Intel Wellsburg watchdog timer", 10, 2 }, 258 { DEVICEID_WBG24, "Intel Wellsburg watchdog timer", 10, 2 }, 259 { DEVICEID_WBG25, "Intel Wellsburg watchdog timer", 10, 2 }, 260 { DEVICEID_WBG26, "Intel Wellsburg watchdog timer", 10, 2 }, 261 { DEVICEID_WBG27, "Intel Wellsburg watchdog timer", 10, 2 }, 262 { DEVICEID_WBG28, "Intel Wellsburg watchdog timer", 10, 2 }, 263 { DEVICEID_WBG29, "Intel Wellsburg watchdog timer", 10, 2 }, 264 { DEVICEID_WBG30, "Intel Wellsburg watchdog timer", 10, 2 }, 265 { DEVICEID_WBG31, "Intel Wellsburg watchdog timer", 10, 2 }, 266 { DEVICEID_LPT_LP0, "Intel Lynx Point-LP watchdog timer", 10, 2 }, 267 { DEVICEID_LPT_LP1, "Intel Lynx Point-LP watchdog timer", 10, 2 }, 268 { DEVICEID_LPT_LP2, "Intel Lynx Point-LP watchdog timer", 10, 2 }, 269 { DEVICEID_LPT_LP3, "Intel Lynx Point-LP watchdog timer", 10, 2 }, 270 { DEVICEID_LPT_LP4, "Intel Lynx Point-LP watchdog timer", 10, 2 }, 271 { DEVICEID_LPT_LP5, "Intel Lynx Point-LP watchdog timer", 10, 2 }, 272 { DEVICEID_LPT_LP6, "Intel Lynx Point-LP watchdog timer", 10, 2 }, 273 { DEVICEID_LPT_LP7, "Intel Lynx Point-LP watchdog timer", 10, 2 }, 274 { DEVICEID_WCPT_LP1, "Intel Wildcat Point-LP watchdog timer", 10, 2 }, 275 { DEVICEID_WCPT_LP2, "Intel Wildcat Point-LP watchdog timer", 10, 2 }, 276 { DEVICEID_WCPT_LP3, "Intel Wildcat Point-LP watchdog timer", 10, 2 }, 277 { DEVICEID_WCPT_LP5, "Intel Wildcat Point-LP watchdog timer", 10, 2 }, 278 { DEVICEID_WCPT_LP6, "Intel Wildcat Point-LP watchdog timer", 10, 2 }, 279 { DEVICEID_WCPT_LP7, "Intel Wildcat Point-LP watchdog timer", 10, 2 }, 280 { DEVICEID_WCPT_LP9, "Intel Wildcat Point-LP watchdog timer", 10, 2 }, 281 { DEVICEID_DH89XXCC_LPC, "Intel DH89xxCC watchdog timer", 10, 2 }, 282 { DEVICEID_COLETOCRK_LPC, "Intel Coleto Creek watchdog timer", 10, 2 }, 283 { DEVICEID_AVN0, "Intel Avoton/Rangeley SoC watchdog timer",10, 3 }, 284 { DEVICEID_AVN1, "Intel Avoton/Rangeley SoC watchdog timer",10, 3 }, 285 { DEVICEID_AVN2, "Intel Avoton/Rangeley SoC watchdog timer",10, 3 }, 286 { DEVICEID_AVN3, "Intel Avoton/Rangeley SoC watchdog timer",10, 3 }, 287 { DEVICEID_BAYTRAIL, "Intel Bay Trail SoC watchdog timer", 10, 3 }, 288 { DEVICEID_BRASWELL, "Intel Braswell SoC watchdog timer", 10, 3 }, 289 { 0, NULL, 0, 0 }, 290}; 291 292static devclass_t ichwd_devclass; 293 294#define ichwd_read_tco_1(sc, off) \ 295 bus_read_1((sc)->tco_res, (off)) 296#define ichwd_read_tco_2(sc, off) \ 297 bus_read_2((sc)->tco_res, (off)) 298#define ichwd_read_tco_4(sc, off) \ 299 bus_read_4((sc)->tco_res, (off)) 300#define ichwd_read_smi_4(sc, off) \ 301 bus_read_4((sc)->smi_res, (off)) 302#define ichwd_read_gcs_4(sc, off) \ 303 bus_read_4((sc)->gcs_res, (off)) 304/* NB: TCO version 3 devices use the gcs_res resource for the PMC register. */ 305#define ichwd_read_pmc_4(sc, off) \ 306 bus_read_4((sc)->gcs_res, (off)) 307 308#define ichwd_write_tco_1(sc, off, val) \ 309 bus_write_1((sc)->tco_res, (off), (val)) 310#define ichwd_write_tco_2(sc, off, val) \ 311 bus_write_2((sc)->tco_res, (off), (val)) 312#define ichwd_write_tco_4(sc, off, val) \ 313 bus_write_4((sc)->tco_res, (off), (val)) 314#define ichwd_write_smi_4(sc, off, val) \ 315 bus_write_4((sc)->smi_res, (off), (val)) 316#define ichwd_write_gcs_4(sc, off, val) \ 317 bus_write_4((sc)->gcs_res, (off), (val)) 318/* NB: TCO version 3 devices use the gcs_res resource for the PMC register. */ 319#define ichwd_write_pmc_4(sc, off, val) \ 320 bus_write_4((sc)->gcs_res, (off), (val)) 321 322#define ichwd_verbose_printf(dev, ...) \ 323 do { \ 324 if (bootverbose) \ 325 device_printf(dev, __VA_ARGS__);\ 326 } while (0) 327 328/* 329 * Disable the watchdog timeout SMI handler. 330 * 331 * Apparently, some BIOSes install handlers that reset or disable the 332 * watchdog timer instead of resetting the system, so we disable the SMI 333 * (by clearing the SMI_TCO_EN bit of the SMI_EN register) to prevent this 334 * from happening. 335 */ 336static __inline void 337ichwd_smi_disable(struct ichwd_softc *sc) 338{ 339 ichwd_write_smi_4(sc, SMI_EN, ichwd_read_smi_4(sc, SMI_EN) & ~SMI_TCO_EN); 340} 341 342/* 343 * Enable the watchdog timeout SMI handler. See above for details. 344 */ 345static __inline void 346ichwd_smi_enable(struct ichwd_softc *sc) 347{ 348 ichwd_write_smi_4(sc, SMI_EN, ichwd_read_smi_4(sc, SMI_EN) | SMI_TCO_EN); 349} 350 351/* 352 * Check if the watchdog SMI triggering is enabled. 353 */ 354static __inline int 355ichwd_smi_is_enabled(struct ichwd_softc *sc) 356{ 357 return ((ichwd_read_smi_4(sc, SMI_EN) & SMI_TCO_EN) != 0); 358} 359 360/* 361 * Reset the watchdog status bits. 362 */ 363static __inline void 364ichwd_sts_reset(struct ichwd_softc *sc) 365{ 366 /* 367 * The watchdog status bits are set to 1 by the hardware to 368 * indicate various conditions. They can be cleared by software 369 * by writing a 1, not a 0. 370 */ 371 ichwd_write_tco_2(sc, TCO1_STS, TCO_TIMEOUT); 372 /* 373 * According to Intel's docs, clearing SECOND_TO_STS and BOOT_STS must 374 * be done in two separate operations. 375 */ 376 ichwd_write_tco_2(sc, TCO2_STS, TCO_SECOND_TO_STS); 377 ichwd_write_tco_2(sc, TCO2_STS, TCO_BOOT_STS); 378} 379 380/* 381 * Enable the watchdog timer by clearing the TCO_TMR_HALT bit in the 382 * TCO1_CNT register. This is complicated by the need to preserve bit 9 383 * of that same register, and the requirement that all other bits must be 384 * written back as zero. 385 */ 386static __inline void 387ichwd_tmr_enable(struct ichwd_softc *sc) 388{ 389 uint16_t cnt; 390 391 cnt = ichwd_read_tco_2(sc, TCO1_CNT) & TCO_CNT_PRESERVE; 392 ichwd_write_tco_2(sc, TCO1_CNT, cnt & ~TCO_TMR_HALT); 393 sc->active = 1; 394 ichwd_verbose_printf(sc->device, "timer enabled\n"); 395} 396 397/* 398 * Disable the watchdog timer. See above for details. 399 */ 400static __inline void 401ichwd_tmr_disable(struct ichwd_softc *sc) 402{ 403 uint16_t cnt; 404 405 cnt = ichwd_read_tco_2(sc, TCO1_CNT) & TCO_CNT_PRESERVE; 406 ichwd_write_tco_2(sc, TCO1_CNT, cnt | TCO_TMR_HALT); 407 sc->active = 0; 408 ichwd_verbose_printf(sc->device, "timer disabled\n"); 409} 410 411/* 412 * Reload the watchdog timer: writing anything to any of the lower five 413 * bits of the TCO_RLD register reloads the timer from the last value 414 * written to TCO_TMR. 415 */ 416static __inline void 417ichwd_tmr_reload(struct ichwd_softc *sc) 418{ 419 if (sc->tco_version == 1) 420 ichwd_write_tco_1(sc, TCO_RLD, 1); 421 else 422 ichwd_write_tco_2(sc, TCO_RLD, 1); 423} 424 425/* 426 * Set the initial timeout value. Note that this must always be followed 427 * by a reload. 428 */ 429static __inline void 430ichwd_tmr_set(struct ichwd_softc *sc, unsigned int timeout) 431{ 432 433 if (timeout < TCO_RLD_TMR_MIN) 434 timeout = TCO_RLD_TMR_MIN; 435 436 if (sc->tco_version == 1) { 437 uint8_t tmr_val8 = ichwd_read_tco_1(sc, TCO_TMR1); 438 439 tmr_val8 &= (~TCO_RLD1_TMR_MAX & 0xff); 440 if (timeout > TCO_RLD1_TMR_MAX) 441 timeout = TCO_RLD1_TMR_MAX; 442 tmr_val8 |= timeout; 443 ichwd_write_tco_1(sc, TCO_TMR1, tmr_val8); 444 } else { 445 uint16_t tmr_val16 = ichwd_read_tco_2(sc, TCO_TMR2); 446 447 tmr_val16 &= (~TCO_RLD2_TMR_MAX & 0xffff); 448 if (timeout > TCO_RLD2_TMR_MAX) 449 timeout = TCO_RLD2_TMR_MAX; 450 tmr_val16 |= timeout; 451 ichwd_write_tco_2(sc, TCO_TMR2, tmr_val16); 452 } 453 454 sc->timeout = timeout; 455 456 ichwd_verbose_printf(sc->device, "timeout set to %u ticks\n", timeout); 457} 458 459static __inline int 460ichwd_clear_noreboot(struct ichwd_softc *sc) 461{ 462 uint32_t status; 463 int rc = 0; 464 465 /* try to clear the NO_REBOOT bit */ 466 switch (sc->tco_version) { 467 case 1: 468 status = pci_read_config(sc->ich, ICH_GEN_STA, 1); 469 status &= ~ICH_GEN_STA_NO_REBOOT; 470 pci_write_config(sc->ich, ICH_GEN_STA, status, 1); 471 status = pci_read_config(sc->ich, ICH_GEN_STA, 1); 472 if (status & ICH_GEN_STA_NO_REBOOT) 473 rc = EIO; 474 break; 475 case 2: 476 status = ichwd_read_gcs_4(sc, 0); 477 status &= ~ICH_GCS_NO_REBOOT; 478 ichwd_write_gcs_4(sc, 0, status); 479 status = ichwd_read_gcs_4(sc, 0); 480 if (status & ICH_GCS_NO_REBOOT) 481 rc = EIO; 482 break; 483 case 3: 484 status = ichwd_read_pmc_4(sc, 0); 485 status &= ~ICH_PMC_NO_REBOOT; 486 ichwd_write_pmc_4(sc, 0, status); 487 status = ichwd_read_pmc_4(sc, 0); 488 if (status & ICH_PMC_NO_REBOOT) 489 rc = EIO; 490 break; 491 default: 492 ichwd_verbose_printf(sc->device, 493 "Unknown TCO Version: %d, can't set NO_REBOOT.\n", 494 sc->tco_version); 495 break; 496 } 497 498 if (rc) 499 device_printf(sc->device, 500 "ICH WDT present but disabled in BIOS or hardware\n"); 501 502 return (rc); 503} 504 505/* 506 * Watchdog event handler - called by the framework to enable or disable 507 * the watchdog or change the initial timeout value. 508 */ 509static void 510ichwd_event(void *arg, unsigned int cmd, int *error) 511{ 512 struct ichwd_softc *sc = arg; 513 unsigned int timeout; 514 515 /* convert from power-of-two-ns to WDT ticks */ 516 cmd &= WD_INTERVAL; 517 518 if (sc->tco_version == 3) { 519 timeout = ((uint64_t)1 << cmd) / ICHWD_TCO_V3_TICK; 520 } else { 521 timeout = ((uint64_t)1 << cmd) / ICHWD_TICK; 522 } 523 524 if (cmd) { 525 if (!sc->active) 526 ichwd_tmr_enable(sc); 527 if (timeout != sc->timeout) 528 ichwd_tmr_set(sc, timeout); 529 ichwd_tmr_reload(sc); 530 *error = 0; 531 } else { 532 if (sc->active) 533 ichwd_tmr_disable(sc); 534 } 535} 536 537static device_t 538ichwd_find_ich_lpc_bridge(device_t isa, struct ichwd_device **id_p) 539{ 540 struct ichwd_device *id; 541 device_t isab, pci; 542 uint16_t devid; 543 544 /* Check whether parent ISA bridge looks familiar. */ 545 isab = device_get_parent(isa); 546 pci = device_get_parent(isab); 547 if (pci == NULL || device_get_devclass(pci) != devclass_find("pci")) 548 return (NULL); 549 if (pci_get_vendor(isab) != VENDORID_INTEL) 550 return (NULL); 551 devid = pci_get_device(isab); 552 for (id = ichwd_devices; id->desc != NULL; ++id) { 553 if (devid == id->device) { 554 if (id_p != NULL) 555 *id_p = id; 556 return (isab); 557 } 558 } 559 560 return (NULL); 561} 562 563/* 564 * Look for an ICH LPC interface bridge. If one is found, register an 565 * ichwd device. There can be only one. 566 */ 567static void 568ichwd_identify(driver_t *driver, device_t parent) 569{ 570 struct ichwd_device *id_p; 571 device_t ich = NULL; 572 device_t dev; 573 uint32_t base_address; 574 int rc; 575 576 ich = ichwd_find_ich_lpc_bridge(parent, &id_p); 577 if (ich == NULL) 578 return; 579 580 /* good, add child to bus */ 581 if ((dev = device_find_child(parent, driver->name, 0)) == NULL) 582 dev = BUS_ADD_CHILD(parent, 0, driver->name, 0); 583 584 if (dev == NULL) 585 return; 586 587 switch (id_p->tco_version) { 588 case 1: 589 break; 590 case 2: 591 /* get RCBA (root complex base address) */ 592 base_address = pci_read_config(ich, ICH_RCBA, 4); 593 rc = bus_set_resource(ich, SYS_RES_MEMORY, 0, 594 (base_address & 0xffffc000) + ICH_GCS_OFFSET, 595 ICH_GCS_SIZE); 596 if (rc) 597 ichwd_verbose_printf(dev, 598 "Can not set TCO v%d memory resource for RCBA\n", 599 id_p->tco_version); 600 break; 601 case 3: 602 /* get PBASE (Power Management Controller base address) */ 603 base_address = pci_read_config(ich, ICH_PBASE, 4); 604 rc = bus_set_resource(ich, SYS_RES_MEMORY, 0, 605 (base_address & 0xfffffe00) + ICH_PMC_OFFSET, 606 ICH_PMC_SIZE); 607 if (rc) 608 ichwd_verbose_printf(dev, 609 "Can not set TCO v%d memory resource for PBASE\n", 610 id_p->tco_version); 611 break; 612 default: 613 ichwd_verbose_printf(dev, 614 "Can not set unknown TCO v%d memory resource for unknown base address\n", 615 id_p->tco_version); 616 break; 617 } 618} 619 620static int 621ichwd_probe(device_t dev) 622{ 623 struct ichwd_device *id_p; 624 625 /* Do not claim some ISA PnP device by accident. */ 626 if (isa_get_logicalid(dev) != 0) 627 return (ENXIO); 628 629 if (ichwd_find_ich_lpc_bridge(device_get_parent(dev), &id_p) == NULL) 630 return (ENXIO); 631 632 device_set_desc_copy(dev, id_p->desc); 633 return (0); 634} 635 636static int 637ichwd_attach(device_t dev) 638{ 639 struct ichwd_softc *sc; 640 struct ichwd_device *id_p; 641 device_t ich; 642 unsigned int pmbase = 0; 643 644 sc = device_get_softc(dev); 645 sc->device = dev; 646 647 ich = ichwd_find_ich_lpc_bridge(device_get_parent(dev), &id_p); 648 if (ich == NULL) { 649 device_printf(sc->device, "Can not find ICH device.\n"); 650 goto fail; 651 } 652 sc->ich = ich; 653 sc->ich_version = id_p->ich_version; 654 sc->tco_version = id_p->tco_version; 655 656 /* get ACPI base address */ 657 pmbase = pci_read_config(ich, ICH_PMBASE, 2) & ICH_PMBASE_MASK; 658 if (pmbase == 0) { 659 device_printf(dev, "ICH PMBASE register is empty\n"); 660 goto fail; 661 } 662 663 /* allocate I/O register space */ 664 sc->smi_rid = 0; 665 sc->smi_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->smi_rid, 666 pmbase + SMI_BASE, pmbase + SMI_BASE + SMI_LEN - 1, SMI_LEN, 667 RF_ACTIVE | RF_SHAREABLE); 668 if (sc->smi_res == NULL) { 669 device_printf(dev, "unable to reserve SMI registers\n"); 670 goto fail; 671 } 672 673 sc->tco_rid = 1; 674 sc->tco_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->tco_rid, 675 pmbase + TCO_BASE, pmbase + TCO_BASE + TCO_LEN - 1, TCO_LEN, 676 RF_ACTIVE | RF_SHAREABLE); 677 if (sc->tco_res == NULL) { 678 device_printf(dev, "unable to reserve TCO registers\n"); 679 goto fail; 680 } 681 682 sc->gcs_rid = 0; 683 if (sc->tco_version >= 2) { 684 sc->gcs_res = bus_alloc_resource_any(ich, SYS_RES_MEMORY, 685 &sc->gcs_rid, RF_ACTIVE|RF_SHAREABLE); 686 if (sc->gcs_res == NULL) { 687 device_printf(dev, "unable to reserve GCS registers\n"); 688 goto fail; 689 } 690 } 691 692 if (ichwd_clear_noreboot(sc) != 0) 693 goto fail; 694 695 /* 696 * Determine if we are coming up after a watchdog-induced reset. Some 697 * BIOSes may clear this bit at bootup, preventing us from reporting 698 * this case on such systems. We clear this bit in ichwd_sts_reset(). 699 */ 700 if ((ichwd_read_tco_2(sc, TCO2_STS) & TCO_SECOND_TO_STS) != 0) 701 device_printf(dev, 702 "resuming after hardware watchdog timeout\n"); 703 704 /* reset the watchdog status registers */ 705 ichwd_sts_reset(sc); 706 707 /* make sure the WDT starts out inactive */ 708 ichwd_tmr_disable(sc); 709 710 /* register the watchdog event handler */ 711 sc->ev_tag = EVENTHANDLER_REGISTER(watchdog_list, ichwd_event, sc, 0); 712 713 /* disable the SMI handler */ 714 sc->smi_enabled = ichwd_smi_is_enabled(sc); 715 ichwd_smi_disable(sc); 716 717 return (0); 718 fail: 719 sc = device_get_softc(dev); 720 if (sc->tco_res != NULL) 721 bus_release_resource(dev, SYS_RES_IOPORT, 722 sc->tco_rid, sc->tco_res); 723 if (sc->smi_res != NULL) 724 bus_release_resource(dev, SYS_RES_IOPORT, 725 sc->smi_rid, sc->smi_res); 726 if (sc->gcs_res != NULL) 727 bus_release_resource(ich, SYS_RES_MEMORY, 728 sc->gcs_rid, sc->gcs_res); 729 730 return (ENXIO); 731} 732 733static int 734ichwd_detach(device_t dev) 735{ 736 struct ichwd_softc *sc; 737 738 sc = device_get_softc(dev); 739 740 /* halt the watchdog timer */ 741 if (sc->active) 742 ichwd_tmr_disable(sc); 743 744 /* enable the SMI handler */ 745 if (sc->smi_enabled != 0) 746 ichwd_smi_enable(sc); 747 748 /* deregister event handler */ 749 if (sc->ev_tag != NULL) 750 EVENTHANDLER_DEREGISTER(watchdog_list, sc->ev_tag); 751 sc->ev_tag = NULL; 752 753 /* reset the watchdog status registers */ 754 ichwd_sts_reset(sc); 755 756 /* deallocate I/O register space */ 757 bus_release_resource(dev, SYS_RES_IOPORT, sc->tco_rid, sc->tco_res); 758 bus_release_resource(dev, SYS_RES_IOPORT, sc->smi_rid, sc->smi_res); 759 760 /* deallocate memory resource */ 761 if (sc->gcs_res) 762 bus_release_resource(sc->ich, SYS_RES_MEMORY, sc->gcs_rid, 763 sc->gcs_res); 764 765 return (0); 766} 767 768static device_method_t ichwd_methods[] = { 769 DEVMETHOD(device_identify, ichwd_identify), 770 DEVMETHOD(device_probe, ichwd_probe), 771 DEVMETHOD(device_attach, ichwd_attach), 772 DEVMETHOD(device_detach, ichwd_detach), 773 DEVMETHOD(device_shutdown, ichwd_detach), 774 {0,0} 775}; 776 777static driver_t ichwd_driver = { 778 "ichwd", 779 ichwd_methods, 780 sizeof(struct ichwd_softc), 781}; 782 783DRIVER_MODULE(ichwd, isa, ichwd_driver, ichwd_devclass, NULL, NULL); 784