drivers/mfd/lpc_ich.c

   1 /*
   2  *  lpc_ich.c - LPC interface for Intel ICH
   3  *
   4  *  LPC bridge function of the Intel ICH contains many other
   5  *  functional units, such as Interrupt controllers, Timers,
   6  *  Power Management, System Management, GPIO, RTC, and LPC
   7  *  Configuration Registers.
   8  *
   9  *  This driver is derived from lpc_sch.
  10
  11  *  Copyright (c) 2011 Extreme Engineering Solution, Inc.
  12  *  Author: Aaron Sierra <asierra@xes-inc.com>
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License 2 as published
  16  *  by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; see the file COPYING.  If not, write to
  25  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  26  *
  27  *  This driver supports the following I/O Controller hubs:
  28  *      (See the intel documentation on http://developer.intel.com.)
  29  *      document number 290655-003, 290677-014: 82801AA (ICH), 82801AB (ICHO)
  30  *      document number 290687-002, 298242-027: 82801BA (ICH2)
  31  *      document number 290733-003, 290739-013: 82801CA (ICH3-S)
  32  *      document number 290716-001, 290718-007: 82801CAM (ICH3-M)
  33  *      document number 290744-001, 290745-025: 82801DB (ICH4)
  34  *      document number 252337-001, 252663-008: 82801DBM (ICH4-M)
  35  *      document number 273599-001, 273645-002: 82801E (C-ICH)
  36  *      document number 252516-001, 252517-028: 82801EB (ICH5), 82801ER (ICH5R)
  37  *      document number 300641-004, 300884-013: 6300ESB
  38  *      document number 301473-002, 301474-026: 82801F (ICH6)
  39  *      document number 313082-001, 313075-006: 631xESB, 632xESB
  40  *      document number 307013-003, 307014-024: 82801G (ICH7)
  41  *      document number 322896-001, 322897-001: NM10
  42  *      document number 313056-003, 313057-017: 82801H (ICH8)
  43  *      document number 316972-004, 316973-012: 82801I (ICH9)
  44  *      document number 319973-002, 319974-002: 82801J (ICH10)
  45  *      document number 322169-001, 322170-003: 5 Series, 3400 Series (PCH)
  46  *      document number 320066-003, 320257-008: EP80597 (IICH)
  47  *      document number 324645-001, 324646-001: Cougar Point (CPT)
  48  *      document number TBD : Patsburg (PBG)
  49  *      document number TBD : DH89xxCC
  50  *      document number TBD : Panther Point
  51  *      document number TBD : Lynx Point
  52  *      document number TBD : Lynx Point-LP
  53  *      document number TBD : Wellsburg
  54  *      document number TBD : Avoton SoC
  55  *      document number TBD : Coleto Creek
  56  *      document number TBD : Wildcat Point-LP
  57  *      document number TBD : 9 Series
  58  */
  59
  60 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  61
  62 #include <linux/kernel.h>
  63 #include <linux/module.h>
  64 #include <linux/errno.h>
  65 #include <linux/acpi.h>
  66 #include <linux/pci.h>
  67 #include <linux/mfd/core.h>
  68 #include <linux/mfd/lpc_ich.h>
  69 #include <linux/platform_data/itco_wdt.h>
  70
  71 #define ACPIBASE                0x40
  72 #define ACPIBASE_GPE_OFF        0x28
  73 #define ACPIBASE_GPE_END        0x2f
  74 #define ACPIBASE_SMI_OFF        0x30
  75 #define ACPIBASE_SMI_END        0x33
  76 #define ACPIBASE_PMC_OFF        0x08
  77 #define ACPIBASE_PMC_END        0x0c
  78 #define ACPIBASE_TCO_OFF        0x60
  79 #define ACPIBASE_TCO_END        0x7f
  80 #define ACPICTRL_PMCBASE        0x44
  81
  82 #define ACPIBASE_GCS_OFF        0x3410
  83 #define ACPIBASE_GCS_END        0x3414
  84
  85 #define GPIOBASE_ICH0           0x58
  86 #define GPIOCTRL_ICH0           0x5C
  87 #define GPIOBASE_ICH6           0x48
  88 #define GPIOCTRL_ICH6           0x4C
  89
  90 #define RCBABASE                0xf0
  91
  92 #define wdt_io_res(i) wdt_res(0, i)
  93 #define wdt_mem_res(i) wdt_res(ICH_RES_MEM_OFF, i)
  94 #define wdt_res(b, i) (&wdt_ich_res[(b) + (i)])
  95
  96 struct lpc_ich_priv {
  97         int chipset;
  98
  99         int abase;              /* ACPI base */
 100         int actrl_pbase;        /* ACPI control or PMC base */
 101         int gbase;              /* GPIO base */
 102         int gctrl;              /* GPIO control */
 103
 104         int abase_save;         /* Cached ACPI base value */
 105         int actrl_pbase_save;           /* Cached ACPI control or PMC base value */
 106         int gctrl_save;         /* Cached GPIO control value */
 107 };
 108
 109 static struct resource wdt_ich_res[] = {
 110         /* ACPI - TCO */
 111         {
 112                 .flags = IORESOURCE_IO,
 113         },
 114         /* ACPI - SMI */
 115         {
 116                 .flags = IORESOURCE_IO,
 117         },
 118         /* GCS or PMC */
 119         {
 120                 .flags = IORESOURCE_MEM,
 121         },
 122 };
 123
 124 static struct resource gpio_ich_res[] = {
 125         /* GPIO */
 126         {
 127                 .flags = IORESOURCE_IO,
 128         },
 129         /* ACPI - GPE0 */
 130         {
 131                 .flags = IORESOURCE_IO,
 132         },
 133 };
 134
 135 enum lpc_cells {
 136         LPC_WDT = 0,
 137         LPC_GPIO,
 138 };
 139
 140 static struct mfd_cell lpc_ich_cells[] = {
 141         [LPC_WDT] = {
 142                 .name = "iTCO_wdt",
 143                 .num_resources = ARRAY_SIZE(wdt_ich_res),
 144                 .resources = wdt_ich_res,
 145                 .ignore_resource_conflicts = true,
 146         },
 147         [LPC_GPIO] = {
 148                 .name = "gpio_ich",
 149                 .num_resources = ARRAY_SIZE(gpio_ich_res),
 150                 .resources = gpio_ich_res,
 151                 .ignore_resource_conflicts = true,
 152         },
 153 };
 154
 155 /* chipset related info */
 156 enum lpc_chipsets {
 157         LPC_ICH = 0,    /* ICH */
 158         LPC_ICH0,       /* ICH0 */
 159         LPC_ICH2,       /* ICH2 */
 160         LPC_ICH2M,      /* ICH2-M */
 161         LPC_ICH3,       /* ICH3-S */
 162         LPC_ICH3M,      /* ICH3-M */
 163         LPC_ICH4,       /* ICH4 */
 164         LPC_ICH4M,      /* ICH4-M */
 165         LPC_CICH,       /* C-ICH */
 166         LPC_ICH5,       /* ICH5 & ICH5R */
 167         LPC_6300ESB,    /* 6300ESB */
 168         LPC_ICH6,       /* ICH6 & ICH6R */
 169         LPC_ICH6M,      /* ICH6-M */
 170         LPC_ICH6W,      /* ICH6W & ICH6RW */
 171         LPC_631XESB,    /* 631xESB/632xESB */
 172         LPC_ICH7,       /* ICH7 & ICH7R */
 173         LPC_ICH7DH,     /* ICH7DH */
 174         LPC_ICH7M,      /* ICH7-M & ICH7-U */
 175         LPC_ICH7MDH,    /* ICH7-M DH */
 176         LPC_NM10,       /* NM10 */
 177         LPC_ICH8,       /* ICH8 & ICH8R */
 178         LPC_ICH8DH,     /* ICH8DH */
 179         LPC_ICH8DO,     /* ICH8DO */
 180         LPC_ICH8M,      /* ICH8M */
 181         LPC_ICH8ME,     /* ICH8M-E */
 182         LPC_ICH9,       /* ICH9 */
 183         LPC_ICH9R,      /* ICH9R */
 184         LPC_ICH9DH,     /* ICH9DH */
 185         LPC_ICH9DO,     /* ICH9DO */
 186         LPC_ICH9M,      /* ICH9M */
 187         LPC_ICH9ME,     /* ICH9M-E */
 188         LPC_ICH10,      /* ICH10 */
 189         LPC_ICH10R,     /* ICH10R */
 190         LPC_ICH10D,     /* ICH10D */
 191         LPC_ICH10DO,    /* ICH10DO */
 192         LPC_PCH,        /* PCH Desktop Full Featured */
 193         LPC_PCHM,       /* PCH Mobile Full Featured */
 194         LPC_P55,        /* P55 */
 195         LPC_PM55,       /* PM55 */
 196         LPC_H55,        /* H55 */
 197         LPC_QM57,       /* QM57 */
 198         LPC_H57,        /* H57 */
 199         LPC_HM55,       /* HM55 */
 200         LPC_Q57,        /* Q57 */
 201         LPC_HM57,       /* HM57 */
 202         LPC_PCHMSFF,    /* PCH Mobile SFF Full Featured */
 203         LPC_QS57,       /* QS57 */
 204         LPC_3400,       /* 3400 */
 205         LPC_3420,       /* 3420 */
 206         LPC_3450,       /* 3450 */
 207         LPC_EP80579,    /* EP80579 */
 208         LPC_CPT,        /* Cougar Point */
 209         LPC_CPTD,       /* Cougar Point Desktop */
 210         LPC_CPTM,       /* Cougar Point Mobile */
 211         LPC_PBG,        /* Patsburg */
 212         LPC_DH89XXCC,   /* DH89xxCC */
 213         LPC_PPT,        /* Panther Point */
 214         LPC_LPT,        /* Lynx Point */
 215         LPC_LPT_LP,     /* Lynx Point-LP */
 216         LPC_WBG,        /* Wellsburg */
 217         LPC_AVN,        /* Avoton SoC */
 218         LPC_BAYTRAIL,   /* Bay Trail SoC */
 219         LPC_COLETO,     /* Coleto Creek */
 220         LPC_WPT_LP,     /* Wildcat Point-LP */
 221         LPC_BRASWELL,   /* Braswell SoC */
 222         LPC_9S,         /* 9 Series */
 223 };
 224
 225 static struct lpc_ich_info lpc_chipset_info[] = {
 226         [LPC_ICH] = {
 227                 .name = "ICH",
 228                 .iTCO_version = 1,
 229         },
 230         [LPC_ICH0] = {
 231                 .name = "ICH0",
 232                 .iTCO_version = 1,
 233         },
 234         [LPC_ICH2] = {
 235                 .name = "ICH2",
 236                 .iTCO_version = 1,
 237         },
 238         [LPC_ICH2M] = {
 239                 .name = "ICH2-M",
 240                 .iTCO_version = 1,
 241         },
 242         [LPC_ICH3] = {
 243                 .name = "ICH3-S",
 244                 .iTCO_version = 1,
 245         },
 246         [LPC_ICH3M] = {
 247                 .name = "ICH3-M",
 248                 .iTCO_version = 1,
 249         },
 250         [LPC_ICH4] = {
 251                 .name = "ICH4",
 252                 .iTCO_version = 1,
 253         },
 254         [LPC_ICH4M] = {
 255                 .name = "ICH4-M",
 256                 .iTCO_version = 1,
 257         },
 258         [LPC_CICH] = {
 259                 .name = "C-ICH",
 260                 .iTCO_version = 1,
 261         },
 262         [LPC_ICH5] = {
 263                 .name = "ICH5 or ICH5R",
 264                 .iTCO_version = 1,
 265         },
 266         [LPC_6300ESB] = {
 267                 .name = "6300ESB",
 268                 .iTCO_version = 1,
 269         },
 270         [LPC_ICH6] = {
 271                 .name = "ICH6 or ICH6R",
 272                 .iTCO_version = 2,
 273                 .gpio_version = ICH_V6_GPIO,
 274         },
 275         [LPC_ICH6M] = {
 276                 .name = "ICH6-M",
 277                 .iTCO_version = 2,
 278                 .gpio_version = ICH_V6_GPIO,
 279         },
 280         [LPC_ICH6W] = {
 281                 .name = "ICH6W or ICH6RW",
 282                 .iTCO_version = 2,
 283                 .gpio_version = ICH_V6_GPIO,
 284         },
 285         [LPC_631XESB] = {
 286                 .name = "631xESB/632xESB",
 287                 .iTCO_version = 2,
 288                 .gpio_version = ICH_V6_GPIO,
 289         },
 290         [LPC_ICH7] = {
 291                 .name = "ICH7 or ICH7R",
 292                 .iTCO_version = 2,
 293                 .gpio_version = ICH_V7_GPIO,
 294         },
 295         [LPC_ICH7DH] = {
 296                 .name = "ICH7DH",
 297                 .iTCO_version = 2,
 298                 .gpio_version = ICH_V7_GPIO,
 299         },
 300         [LPC_ICH7M] = {
 301                 .name = "ICH7-M or ICH7-U",
 302                 .iTCO_version = 2,
 303                 .gpio_version = ICH_V7_GPIO,
 304         },
 305         [LPC_ICH7MDH] = {
 306                 .name = "ICH7-M DH",
 307                 .iTCO_version = 2,
 308                 .gpio_version = ICH_V7_GPIO,
 309         },
 310         [LPC_NM10] = {
 311                 .name = "NM10",
 312                 .iTCO_version = 2,
 313                 .gpio_version = ICH_V7_GPIO,
 314         },
 315         [LPC_ICH8] = {
 316                 .name = "ICH8 or ICH8R",
 317                 .iTCO_version = 2,
 318                 .gpio_version = ICH_V7_GPIO,
 319         },
 320         [LPC_ICH8DH] = {
 321                 .name = "ICH8DH",
 322                 .iTCO_version = 2,
 323                 .gpio_version = ICH_V7_GPIO,
 324         },
 325         [LPC_ICH8DO] = {
 326                 .name = "ICH8DO",
 327                 .iTCO_version = 2,
 328                 .gpio_version = ICH_V7_GPIO,
 329         },
 330         [LPC_ICH8M] = {
 331                 .name = "ICH8M",
 332                 .iTCO_version = 2,
 333                 .gpio_version = ICH_V7_GPIO,
 334         },
 335         [LPC_ICH8ME] = {
 336                 .name = "ICH8M-E",
 337                 .iTCO_version = 2,
 338                 .gpio_version = ICH_V7_GPIO,
 339         },
 340         [LPC_ICH9] = {
 341                 .name = "ICH9",
 342                 .iTCO_version = 2,
 343                 .gpio_version = ICH_V9_GPIO,
 344         },
 345         [LPC_ICH9R] = {
 346                 .name = "ICH9R",
 347                 .iTCO_version = 2,
 348                 .gpio_version = ICH_V9_GPIO,
 349         },
 350         [LPC_ICH9DH] = {
 351                 .name = "ICH9DH",
 352                 .iTCO_version = 2,
 353                 .gpio_version = ICH_V9_GPIO,
 354         },
 355         [LPC_ICH9DO] = {
 356                 .name = "ICH9DO",
 357                 .iTCO_version = 2,
 358                 .gpio_version = ICH_V9_GPIO,
 359         },
 360         [LPC_ICH9M] = {
 361                 .name = "ICH9M",
 362                 .iTCO_version = 2,
 363                 .gpio_version = ICH_V9_GPIO,
 364         },
 365         [LPC_ICH9ME] = {
 366                 .name = "ICH9M-E",
 367                 .iTCO_version = 2,
 368                 .gpio_version = ICH_V9_GPIO,
 369         },
 370         [LPC_ICH10] = {
 371                 .name = "ICH10",
 372                 .iTCO_version = 2,
 373                 .gpio_version = ICH_V10CONS_GPIO,
 374         },
 375         [LPC_ICH10R] = {
 376                 .name = "ICH10R",
 377                 .iTCO_version = 2,
 378                 .gpio_version = ICH_V10CONS_GPIO,
 379         },
 380         [LPC_ICH10D] = {
 381                 .name = "ICH10D",
 382                 .iTCO_version = 2,
 383                 .gpio_version = ICH_V10CORP_GPIO,
 384         },
 385         [LPC_ICH10DO] = {
 386                 .name = "ICH10DO",
 387                 .iTCO_version = 2,
 388                 .gpio_version = ICH_V10CORP_GPIO,
 389         },
 390         [LPC_PCH] = {
 391                 .name = "PCH Desktop Full Featured",
 392                 .iTCO_version = 2,
 393                 .gpio_version = ICH_V5_GPIO,
 394         },
 395         [LPC_PCHM] = {
 396                 .name = "PCH Mobile Full Featured",
 397                 .iTCO_version = 2,
 398                 .gpio_version = ICH_V5_GPIO,
 399         },
 400         [LPC_P55] = {
 401                 .name = "P55",
 402                 .iTCO_version = 2,
 403                 .gpio_version = ICH_V5_GPIO,
 404         },
 405         [LPC_PM55] = {
 406                 .name = "PM55",
 407                 .iTCO_version = 2,
 408                 .gpio_version = ICH_V5_GPIO,
 409         },
 410         [LPC_H55] = {
 411                 .name = "H55",
 412                 .iTCO_version = 2,
 413                 .gpio_version = ICH_V5_GPIO,
 414         },
 415         [LPC_QM57] = {
 416                 .name = "QM57",
 417                 .iTCO_version = 2,
 418                 .gpio_version = ICH_V5_GPIO,
 419         },
 420         [LPC_H57] = {
 421                 .name = "H57",
 422                 .iTCO_version = 2,
 423                 .gpio_version = ICH_V5_GPIO,
 424         },
 425         [LPC_HM55] = {
 426                 .name = "HM55",
 427                 .iTCO_version = 2,
 428                 .gpio_version = ICH_V5_GPIO,
 429         },
 430         [LPC_Q57] = {
 431                 .name = "Q57",
 432                 .iTCO_version = 2,
 433                 .gpio_version = ICH_V5_GPIO,
 434         },
 435         [LPC_HM57] = {
 436                 .name = "HM57",
 437                 .iTCO_version = 2,
 438                 .gpio_version = ICH_V5_GPIO,
 439         },
 440         [LPC_PCHMSFF] = {
 441                 .name = "PCH Mobile SFF Full Featured",
 442                 .iTCO_version = 2,
 443                 .gpio_version = ICH_V5_GPIO,
 444         },
 445         [LPC_QS57] = {
 446                 .name = "QS57",
 447                 .iTCO_version = 2,
 448                 .gpio_version = ICH_V5_GPIO,
 449         },
 450         [LPC_3400] = {
 451                 .name = "3400",
 452                 .iTCO_version = 2,
 453                 .gpio_version = ICH_V5_GPIO,
 454         },
 455         [LPC_3420] = {
 456                 .name = "3420",
 457                 .iTCO_version = 2,
 458                 .gpio_version = ICH_V5_GPIO,
 459         },
 460         [LPC_3450] = {
 461                 .name = "3450",
 462                 .iTCO_version = 2,
 463                 .gpio_version = ICH_V5_GPIO,
 464         },
 465         [LPC_EP80579] = {
 466                 .name = "EP80579",
 467                 .iTCO_version = 2,
 468         },
 469         [LPC_CPT] = {
 470                 .name = "Cougar Point",
 471                 .iTCO_version = 2,
 472                 .gpio_version = ICH_V5_GPIO,
 473         },
 474         [LPC_CPTD] = {
 475                 .name = "Cougar Point Desktop",
 476                 .iTCO_version = 2,
 477                 .gpio_version = ICH_V5_GPIO,
 478         },
 479         [LPC_CPTM] = {
 480                 .name = "Cougar Point Mobile",
 481                 .iTCO_version = 2,
 482                 .gpio_version = ICH_V5_GPIO,
 483         },
 484         [LPC_PBG] = {
 485                 .name = "Patsburg",
 486                 .iTCO_version = 2,
 487         },
 488         [LPC_DH89XXCC] = {
 489                 .name = "DH89xxCC",
 490                 .iTCO_version = 2,
 491         },
 492         [LPC_PPT] = {
 493                 .name = "Panther Point",
 494                 .iTCO_version = 2,
 495                 .gpio_version = ICH_V5_GPIO,
 496         },
 497         [LPC_LPT] = {
 498                 .name = "Lynx Point",
 499                 .iTCO_version = 2,
 500         },
 501         [LPC_LPT_LP] = {
 502                 .name = "Lynx Point_LP",
 503                 .iTCO_version = 2,
 504         },
 505         [LPC_WBG] = {
 506                 .name = "Wellsburg",
 507                 .iTCO_version = 2,
 508         },
 509         [LPC_AVN] = {
 510                 .name = "Avoton SoC",
 511                 .iTCO_version = 3,
 512                 .gpio_version = AVOTON_GPIO,
 513         },
 514         [LPC_BAYTRAIL] = {
 515                 .name = "Bay Trail SoC",
 516                 .iTCO_version = 3,
 517         },
 518         [LPC_COLETO] = {
 519                 .name = "Coleto Creek",
 520                 .iTCO_version = 2,
 521         },
 522         [LPC_WPT_LP] = {
 523                 .name = "Wildcat Point_LP",
 524                 .iTCO_version = 2,
 525         },
 526         [LPC_BRASWELL] = {
 527                 .name = "Braswell SoC",
 528                 .iTCO_version = 3,
 529         },
 530         [LPC_9S] = {
 531                 .name = "9 Series",
 532                 .iTCO_version = 2,
 533         },
 534 };
 535
 536 /*
 537  * This data only exists for exporting the supported PCI ids
 538  * via MODULE_DEVICE_TABLE.  We do not actually register a
 539  * pci_driver, because the I/O Controller Hub has also other
 540  * functions that probably will be registered by other drivers.
 541  */
 542 static const struct pci_device_id lpc_ich_ids[] = {
 543         { PCI_VDEVICE(INTEL, 0x0f1c), LPC_BAYTRAIL},
 544         { PCI_VDEVICE(INTEL, 0x1c41), LPC_CPT},
 545         { PCI_VDEVICE(INTEL, 0x1c42), LPC_CPTD},
 546         { PCI_VDEVICE(INTEL, 0x1c43), LPC_CPTM},
 547         { PCI_VDEVICE(INTEL, 0x1c44), LPC_CPT},
 548         { PCI_VDEVICE(INTEL, 0x1c45), LPC_CPT},
 549         { PCI_VDEVICE(INTEL, 0x1c46), LPC_CPT},
 550         { PCI_VDEVICE(INTEL, 0x1c47), LPC_CPT},
 551         { PCI_VDEVICE(INTEL, 0x1c48), LPC_CPT},
 552         { PCI_VDEVICE(INTEL, 0x1c49), LPC_CPT},
 553         { PCI_VDEVICE(INTEL, 0x1c4a), LPC_CPT},
 554         { PCI_VDEVICE(INTEL, 0x1c4b), LPC_CPT},
 555         { PCI_VDEVICE(INTEL, 0x1c4c), LPC_CPT},
 556         { PCI_VDEVICE(INTEL, 0x1c4d), LPC_CPT},
 557         { PCI_VDEVICE(INTEL, 0x1c4e), LPC_CPT},
 558         { PCI_VDEVICE(INTEL, 0x1c4f), LPC_CPT},
 559         { PCI_VDEVICE(INTEL, 0x1c50), LPC_CPT},
 560         { PCI_VDEVICE(INTEL, 0x1c51), LPC_CPT},
 561         { PCI_VDEVICE(INTEL, 0x1c52), LPC_CPT},
 562         { PCI_VDEVICE(INTEL, 0x1c53), LPC_CPT},
 563         { PCI_VDEVICE(INTEL, 0x1c54), LPC_CPT},
 564         { PCI_VDEVICE(INTEL, 0x1c55), LPC_CPT},
 565         { PCI_VDEVICE(INTEL, 0x1c56), LPC_CPT},
 566         { PCI_VDEVICE(INTEL, 0x1c57), LPC_CPT},
 567         { PCI_VDEVICE(INTEL, 0x1c58), LPC_CPT},
 568         { PCI_VDEVICE(INTEL, 0x1c59), LPC_CPT},
 569         { PCI_VDEVICE(INTEL, 0x1c5a), LPC_CPT},
 570         { PCI_VDEVICE(INTEL, 0x1c5b), LPC_CPT},
 571         { PCI_VDEVICE(INTEL, 0x1c5c), LPC_CPT},
 572         { PCI_VDEVICE(INTEL, 0x1c5d), LPC_CPT},
 573         { PCI_VDEVICE(INTEL, 0x1c5e), LPC_CPT},
 574         { PCI_VDEVICE(INTEL, 0x1c5f), LPC_CPT},
 575         { PCI_VDEVICE(INTEL, 0x1d40), LPC_PBG},
 576         { PCI_VDEVICE(INTEL, 0x1d41), LPC_PBG},
 577         { PCI_VDEVICE(INTEL, 0x1e40), LPC_PPT},
 578         { PCI_VDEVICE(INTEL, 0x1e41), LPC_PPT},
 579         { PCI_VDEVICE(INTEL, 0x1e42), LPC_PPT},
 580         { PCI_VDEVICE(INTEL, 0x1e43), LPC_PPT},
 581         { PCI_VDEVICE(INTEL, 0x1e44), LPC_PPT},
 582         { PCI_VDEVICE(INTEL, 0x1e45), LPC_PPT},
 583         { PCI_VDEVICE(INTEL, 0x1e46), LPC_PPT},
 584         { PCI_VDEVICE(INTEL, 0x1e47), LPC_PPT},
 585         { PCI_VDEVICE(INTEL, 0x1e48), LPC_PPT},
 586         { PCI_VDEVICE(INTEL, 0x1e49), LPC_PPT},
 587         { PCI_VDEVICE(INTEL, 0x1e4a), LPC_PPT},
 588         { PCI_VDEVICE(INTEL, 0x1e4b), LPC_PPT},
 589         { PCI_VDEVICE(INTEL, 0x1e4c), LPC_PPT},
 590         { PCI_VDEVICE(INTEL, 0x1e4d), LPC_PPT},
 591         { PCI_VDEVICE(INTEL, 0x1e4e), LPC_PPT},
 592         { PCI_VDEVICE(INTEL, 0x1e4f), LPC_PPT},
 593         { PCI_VDEVICE(INTEL, 0x1e50), LPC_PPT},
 594         { PCI_VDEVICE(INTEL, 0x1e51), LPC_PPT},
 595         { PCI_VDEVICE(INTEL, 0x1e52), LPC_PPT},
 596         { PCI_VDEVICE(INTEL, 0x1e53), LPC_PPT},
 597         { PCI_VDEVICE(INTEL, 0x1e54), LPC_PPT},
 598         { PCI_VDEVICE(INTEL, 0x1e55), LPC_PPT},
 599         { PCI_VDEVICE(INTEL, 0x1e56), LPC_PPT},
 600         { PCI_VDEVICE(INTEL, 0x1e57), LPC_PPT},
 601         { PCI_VDEVICE(INTEL, 0x1e58), LPC_PPT},
 602         { PCI_VDEVICE(INTEL, 0x1e59), LPC_PPT},
 603         { PCI_VDEVICE(INTEL, 0x1e5a), LPC_PPT},
 604         { PCI_VDEVICE(INTEL, 0x1e5b), LPC_PPT},
 605         { PCI_VDEVICE(INTEL, 0x1e5c), LPC_PPT},
 606         { PCI_VDEVICE(INTEL, 0x1e5d), LPC_PPT},
 607         { PCI_VDEVICE(INTEL, 0x1e5e), LPC_PPT},
 608         { PCI_VDEVICE(INTEL, 0x1e5f), LPC_PPT},
 609         { PCI_VDEVICE(INTEL, 0x1f38), LPC_AVN},
 610         { PCI_VDEVICE(INTEL, 0x1f39), LPC_AVN},
 611         { PCI_VDEVICE(INTEL, 0x1f3a), LPC_AVN},
 612         { PCI_VDEVICE(INTEL, 0x1f3b), LPC_AVN},
 613         { PCI_VDEVICE(INTEL, 0x229c), LPC_BRASWELL},
 614         { PCI_VDEVICE(INTEL, 0x2310), LPC_DH89XXCC},
 615         { PCI_VDEVICE(INTEL, 0x2390), LPC_COLETO},
 616         { PCI_VDEVICE(INTEL, 0x2410), LPC_ICH},
 617         { PCI_VDEVICE(INTEL, 0x2420), LPC_ICH0},
 618         { PCI_VDEVICE(INTEL, 0x2440), LPC_ICH2},
 619         { PCI_VDEVICE(INTEL, 0x244c), LPC_ICH2M},
 620         { PCI_VDEVICE(INTEL, 0x2450), LPC_CICH},
 621         { PCI_VDEVICE(INTEL, 0x2480), LPC_ICH3},
 622         { PCI_VDEVICE(INTEL, 0x248c), LPC_ICH3M},
 623         { PCI_VDEVICE(INTEL, 0x24c0), LPC_ICH4},
 624         { PCI_VDEVICE(INTEL, 0x24cc), LPC_ICH4M},
 625         { PCI_VDEVICE(INTEL, 0x24d0), LPC_ICH5},
 626         { PCI_VDEVICE(INTEL, 0x25a1), LPC_6300ESB},
 627         { PCI_VDEVICE(INTEL, 0x2640), LPC_ICH6},
 628         { PCI_VDEVICE(INTEL, 0x2641), LPC_ICH6M},
 629         { PCI_VDEVICE(INTEL, 0x2642), LPC_ICH6W},
 630         { PCI_VDEVICE(INTEL, 0x2670), LPC_631XESB},
 631         { PCI_VDEVICE(INTEL, 0x2671), LPC_631XESB},
 632         { PCI_VDEVICE(INTEL, 0x2672), LPC_631XESB},
 633         { PCI_VDEVICE(INTEL, 0x2673), LPC_631XESB},
 634         { PCI_VDEVICE(INTEL, 0x2674), LPC_631XESB},
 635         { PCI_VDEVICE(INTEL, 0x2675), LPC_631XESB},
 636         { PCI_VDEVICE(INTEL, 0x2676), LPC_631XESB},
 637         { PCI_VDEVICE(INTEL, 0x2677), LPC_631XESB},
 638         { PCI_VDEVICE(INTEL, 0x2678), LPC_631XESB},
 639         { PCI_VDEVICE(INTEL, 0x2679), LPC_631XESB},
 640         { PCI_VDEVICE(INTEL, 0x267a), LPC_631XESB},
 641         { PCI_VDEVICE(INTEL, 0x267b), LPC_631XESB},
 642         { PCI_VDEVICE(INTEL, 0x267c), LPC_631XESB},
 643         { PCI_VDEVICE(INTEL, 0x267d), LPC_631XESB},
 644         { PCI_VDEVICE(INTEL, 0x267e), LPC_631XESB},
 645         { PCI_VDEVICE(INTEL, 0x267f), LPC_631XESB},
 646         { PCI_VDEVICE(INTEL, 0x27b0), LPC_ICH7DH},
 647         { PCI_VDEVICE(INTEL, 0x27b8), LPC_ICH7},
 648         { PCI_VDEVICE(INTEL, 0x27b9), LPC_ICH7M},
 649         { PCI_VDEVICE(INTEL, 0x27bc), LPC_NM10},
 650         { PCI_VDEVICE(INTEL, 0x27bd), LPC_ICH7MDH},
 651         { PCI_VDEVICE(INTEL, 0x2810), LPC_ICH8},
 652         { PCI_VDEVICE(INTEL, 0x2811), LPC_ICH8ME},
 653         { PCI_VDEVICE(INTEL, 0x2812), LPC_ICH8DH},
 654         { PCI_VDEVICE(INTEL, 0x2814), LPC_ICH8DO},
 655         { PCI_VDEVICE(INTEL, 0x2815), LPC_ICH8M},
 656         { PCI_VDEVICE(INTEL, 0x2912), LPC_ICH9DH},
 657         { PCI_VDEVICE(INTEL, 0x2914), LPC_ICH9DO},
 658         { PCI_VDEVICE(INTEL, 0x2916), LPC_ICH9R},
 659         { PCI_VDEVICE(INTEL, 0x2917), LPC_ICH9ME},
 660         { PCI_VDEVICE(INTEL, 0x2918), LPC_ICH9},
 661         { PCI_VDEVICE(INTEL, 0x2919), LPC_ICH9M},
 662         { PCI_VDEVICE(INTEL, 0x3a14), LPC_ICH10DO},
 663         { PCI_VDEVICE(INTEL, 0x3a16), LPC_ICH10R},
 664         { PCI_VDEVICE(INTEL, 0x3a18), LPC_ICH10},
 665         { PCI_VDEVICE(INTEL, 0x3a1a), LPC_ICH10D},
 666         { PCI_VDEVICE(INTEL, 0x3b00), LPC_PCH},
 667         { PCI_VDEVICE(INTEL, 0x3b01), LPC_PCHM},
 668         { PCI_VDEVICE(INTEL, 0x3b02), LPC_P55},
 669         { PCI_VDEVICE(INTEL, 0x3b03), LPC_PM55},
 670         { PCI_VDEVICE(INTEL, 0x3b06), LPC_H55},
 671         { PCI_VDEVICE(INTEL, 0x3b07), LPC_QM57},
 672         { PCI_VDEVICE(INTEL, 0x3b08), LPC_H57},
 673         { PCI_VDEVICE(INTEL, 0x3b09), LPC_HM55},
 674         { PCI_VDEVICE(INTEL, 0x3b0a), LPC_Q57},
 675         { PCI_VDEVICE(INTEL, 0x3b0b), LPC_HM57},
 676         { PCI_VDEVICE(INTEL, 0x3b0d), LPC_PCHMSFF},
 677         { PCI_VDEVICE(INTEL, 0x3b0f), LPC_QS57},
 678         { PCI_VDEVICE(INTEL, 0x3b12), LPC_3400},
 679         { PCI_VDEVICE(INTEL, 0x3b14), LPC_3420},
 680         { PCI_VDEVICE(INTEL, 0x3b16), LPC_3450},
 681         { PCI_VDEVICE(INTEL, 0x5031), LPC_EP80579},
 682         { PCI_VDEVICE(INTEL, 0x8c40), LPC_LPT},
 683         { PCI_VDEVICE(INTEL, 0x8c41), LPC_LPT},
 684         { PCI_VDEVICE(INTEL, 0x8c42), LPC_LPT},
 685         { PCI_VDEVICE(INTEL, 0x8c43), LPC_LPT},
 686         { PCI_VDEVICE(INTEL, 0x8c44), LPC_LPT},
 687         { PCI_VDEVICE(INTEL, 0x8c45), LPC_LPT},
 688         { PCI_VDEVICE(INTEL, 0x8c46), LPC_LPT},
 689         { PCI_VDEVICE(INTEL, 0x8c47), LPC_LPT},
 690         { PCI_VDEVICE(INTEL, 0x8c48), LPC_LPT},
 691         { PCI_VDEVICE(INTEL, 0x8c49), LPC_LPT},
 692         { PCI_VDEVICE(INTEL, 0x8c4a), LPC_LPT},
 693         { PCI_VDEVICE(INTEL, 0x8c4b), LPC_LPT},
 694         { PCI_VDEVICE(INTEL, 0x8c4c), LPC_LPT},
 695         { PCI_VDEVICE(INTEL, 0x8c4d), LPC_LPT},
 696         { PCI_VDEVICE(INTEL, 0x8c4e), LPC_LPT},
 697         { PCI_VDEVICE(INTEL, 0x8c4f), LPC_LPT},
 698         { PCI_VDEVICE(INTEL, 0x8c50), LPC_LPT},
 699         { PCI_VDEVICE(INTEL, 0x8c51), LPC_LPT},
 700         { PCI_VDEVICE(INTEL, 0x8c52), LPC_LPT},
 701         { PCI_VDEVICE(INTEL, 0x8c53), LPC_LPT},
 702         { PCI_VDEVICE(INTEL, 0x8c54), LPC_LPT},
 703         { PCI_VDEVICE(INTEL, 0x8c55), LPC_LPT},
 704         { PCI_VDEVICE(INTEL, 0x8c56), LPC_LPT},
 705         { PCI_VDEVICE(INTEL, 0x8c57), LPC_LPT},
 706         { PCI_VDEVICE(INTEL, 0x8c58), LPC_LPT},
 707         { PCI_VDEVICE(INTEL, 0x8c59), LPC_LPT},
 708         { PCI_VDEVICE(INTEL, 0x8c5a), LPC_LPT},
 709         { PCI_VDEVICE(INTEL, 0x8c5b), LPC_LPT},
 710         { PCI_VDEVICE(INTEL, 0x8c5c), LPC_LPT},
 711         { PCI_VDEVICE(INTEL, 0x8c5d), LPC_LPT},
 712         { PCI_VDEVICE(INTEL, 0x8c5e), LPC_LPT},
 713         { PCI_VDEVICE(INTEL, 0x8c5f), LPC_LPT},
 714         { PCI_VDEVICE(INTEL, 0x8cc1), LPC_9S},
 715         { PCI_VDEVICE(INTEL, 0x8cc2), LPC_9S},
 716         { PCI_VDEVICE(INTEL, 0x8cc3), LPC_9S},
 717         { PCI_VDEVICE(INTEL, 0x8cc4), LPC_9S},
 718         { PCI_VDEVICE(INTEL, 0x8cc6), LPC_9S},
 719         { PCI_VDEVICE(INTEL, 0x8d40), LPC_WBG},
 720         { PCI_VDEVICE(INTEL, 0x8d41), LPC_WBG},
 721         { PCI_VDEVICE(INTEL, 0x8d42), LPC_WBG},
 722         { PCI_VDEVICE(INTEL, 0x8d43), LPC_WBG},
 723         { PCI_VDEVICE(INTEL, 0x8d44), LPC_WBG},
 724         { PCI_VDEVICE(INTEL, 0x8d45), LPC_WBG},
 725         { PCI_VDEVICE(INTEL, 0x8d46), LPC_WBG},
 726         { PCI_VDEVICE(INTEL, 0x8d47), LPC_WBG},
 727         { PCI_VDEVICE(INTEL, 0x8d48), LPC_WBG},
 728         { PCI_VDEVICE(INTEL, 0x8d49), LPC_WBG},
 729         { PCI_VDEVICE(INTEL, 0x8d4a), LPC_WBG},
 730         { PCI_VDEVICE(INTEL, 0x8d4b), LPC_WBG},
 731         { PCI_VDEVICE(INTEL, 0x8d4c), LPC_WBG},
 732         { PCI_VDEVICE(INTEL, 0x8d4d), LPC_WBG},
 733         { PCI_VDEVICE(INTEL, 0x8d4e), LPC_WBG},
 734         { PCI_VDEVICE(INTEL, 0x8d4f), LPC_WBG},
 735         { PCI_VDEVICE(INTEL, 0x8d50), LPC_WBG},
 736         { PCI_VDEVICE(INTEL, 0x8d51), LPC_WBG},
 737         { PCI_VDEVICE(INTEL, 0x8d52), LPC_WBG},
 738         { PCI_VDEVICE(INTEL, 0x8d53), LPC_WBG},
 739         { PCI_VDEVICE(INTEL, 0x8d54), LPC_WBG},
 740         { PCI_VDEVICE(INTEL, 0x8d55), LPC_WBG},
 741         { PCI_VDEVICE(INTEL, 0x8d56), LPC_WBG},
 742         { PCI_VDEVICE(INTEL, 0x8d57), LPC_WBG},
 743         { PCI_VDEVICE(INTEL, 0x8d58), LPC_WBG},
 744         { PCI_VDEVICE(INTEL, 0x8d59), LPC_WBG},
 745         { PCI_VDEVICE(INTEL, 0x8d5a), LPC_WBG},
 746         { PCI_VDEVICE(INTEL, 0x8d5b), LPC_WBG},
 747         { PCI_VDEVICE(INTEL, 0x8d5c), LPC_WBG},
 748         { PCI_VDEVICE(INTEL, 0x8d5d), LPC_WBG},
 749         { PCI_VDEVICE(INTEL, 0x8d5e), LPC_WBG},
 750         { PCI_VDEVICE(INTEL, 0x8d5f), LPC_WBG},
 751         { PCI_VDEVICE(INTEL, 0x9c40), LPC_LPT_LP},
 752         { PCI_VDEVICE(INTEL, 0x9c41), LPC_LPT_LP},
 753         { PCI_VDEVICE(INTEL, 0x9c42), LPC_LPT_LP},
 754         { PCI_VDEVICE(INTEL, 0x9c43), LPC_LPT_LP},
 755         { PCI_VDEVICE(INTEL, 0x9c44), LPC_LPT_LP},
 756         { PCI_VDEVICE(INTEL, 0x9c45), LPC_LPT_LP},
 757         { PCI_VDEVICE(INTEL, 0x9c46), LPC_LPT_LP},
 758         { PCI_VDEVICE(INTEL, 0x9c47), LPC_LPT_LP},
 759         { PCI_VDEVICE(INTEL, 0x9cc1), LPC_WPT_LP},
 760         { PCI_VDEVICE(INTEL, 0x9cc2), LPC_WPT_LP},
 761         { PCI_VDEVICE(INTEL, 0x9cc3), LPC_WPT_LP},
 762         { PCI_VDEVICE(INTEL, 0x9cc5), LPC_WPT_LP},
 763         { PCI_VDEVICE(INTEL, 0x9cc6), LPC_WPT_LP},
 764         { PCI_VDEVICE(INTEL, 0x9cc7), LPC_WPT_LP},
 765         { PCI_VDEVICE(INTEL, 0x9cc9), LPC_WPT_LP},
 766         { 0, },                 /* End of list */
 767 };
 768 MODULE_DEVICE_TABLE(pci, lpc_ich_ids);
 769
 770 static void lpc_ich_restore_config_space(struct pci_dev *dev)
 771 {
 772         struct lpc_ich_priv *priv = pci_get_drvdata(dev);
 773
 774         if (priv->abase_save >= 0) {
 775                 pci_write_config_byte(dev, priv->abase, priv->abase_save);
 776                 priv->abase_save = -1;
 777         }
 778
 779         if (priv->actrl_pbase_save >= 0) {
 780                 pci_write_config_byte(dev, priv->actrl_pbase,
 781                         priv->actrl_pbase_save);
 782                 priv->actrl_pbase_save = -1;
 783         }
 784
 785         if (priv->gctrl_save >= 0) {
 786                 pci_write_config_byte(dev, priv->gctrl, priv->gctrl_save);
 787                 priv->gctrl_save = -1;
 788         }
 789 }
 790
 791 static void lpc_ich_enable_acpi_space(struct pci_dev *dev)
 792 {
 793         struct lpc_ich_priv *priv = pci_get_drvdata(dev);
 794         u8 reg_save;
 795
 796         switch (lpc_chipset_info[priv->chipset].iTCO_version) {
 797         case 3:
 798                 /*
 799                  * Some chipsets (eg Avoton) enable the ACPI space in the
 800                  * ACPI BASE register.
 801                  */
 802                 pci_read_config_byte(dev, priv->abase, &reg_save);
 803                 pci_write_config_byte(dev, priv->abase, reg_save | 0x2);
 804                 priv->abase_save = reg_save;
 805                 break;
 806         default:
 807                 /*
 808                  * Most chipsets enable the ACPI space in the ACPI control
 809                  * register.
 810                  */
 811                 pci_read_config_byte(dev, priv->actrl_pbase, &reg_save);
 812                 pci_write_config_byte(dev, priv->actrl_pbase, reg_save | 0x80);
 813                 priv->actrl_pbase_save = reg_save;
 814                 break;
 815         }
 816 }
 817
 818 static void lpc_ich_enable_gpio_space(struct pci_dev *dev)
 819 {
 820         struct lpc_ich_priv *priv = pci_get_drvdata(dev);
 821         u8 reg_save;
 822
 823         pci_read_config_byte(dev, priv->gctrl, &reg_save);
 824         pci_write_config_byte(dev, priv->gctrl, reg_save | 0x10);
 825         priv->gctrl_save = reg_save;
 826 }
 827
 828 static void lpc_ich_enable_pmc_space(struct pci_dev *dev)
 829 {
 830         struct lpc_ich_priv *priv = pci_get_drvdata(dev);
 831         u8 reg_save;
 832
 833         pci_read_config_byte(dev, priv->actrl_pbase, &reg_save);
 834         pci_write_config_byte(dev, priv->actrl_pbase, reg_save | 0x2);
 835
 836         priv->actrl_pbase_save = reg_save;
 837 }
 838
 839 static int lpc_ich_finalize_wdt_cell(struct pci_dev *dev)
 840 {
 841         struct itco_wdt_platform_data *pdata;
 842         struct lpc_ich_priv *priv = pci_get_drvdata(dev);
 843         struct lpc_ich_info *info;
 844         struct mfd_cell *cell = &lpc_ich_cells[LPC_WDT];
 845
 846         pdata = devm_kzalloc(&dev->dev, sizeof(*pdata), GFP_KERNEL);
 847         if (!pdata)
 848                 return -ENOMEM;
 849
 850         info = &lpc_chipset_info[priv->chipset];
 851
 852         pdata->version = info->iTCO_version;
 853         strlcpy(pdata->name, info->name, sizeof(pdata->name));
 854
 855         cell->platform_data = pdata;
 856         cell->pdata_size = sizeof(*pdata);
 857         return 0;
 858 }
 859
 860 static void lpc_ich_finalize_gpio_cell(struct pci_dev *dev)
 861 {
 862         struct lpc_ich_priv *priv = pci_get_drvdata(dev);
 863         struct mfd_cell *cell = &lpc_ich_cells[LPC_GPIO];
 864
 865         cell->platform_data = &lpc_chipset_info[priv->chipset];
 866         cell->pdata_size = sizeof(struct lpc_ich_info);
 867 }
 868
 869 /*
 870  * We don't check for resource conflict globally. There are 2 or 3 independent
 871  * GPIO groups and it's enough to have access to one of these to instantiate
 872  * the device.
 873  */
 874 static int lpc_ich_check_conflict_gpio(struct resource *res)
 875 {
 876         int ret;
 877         u8 use_gpio = 0;
 878
 879         if (resource_size(res) >= 0x50 &&
 880             !acpi_check_region(res->start + 0x40, 0x10, "LPC ICH GPIO3"))
 881                 use_gpio |= 1 << 2;
 882
 883         if (!acpi_check_region(res->start + 0x30, 0x10, "LPC ICH GPIO2"))
 884                 use_gpio |= 1 << 1;
 885
 886         ret = acpi_check_region(res->start + 0x00, 0x30, "LPC ICH GPIO1");
 887         if (!ret)
 888                 use_gpio |= 1 << 0;
 889
 890         return use_gpio ? use_gpio : ret;
 891 }
 892
 893 static int lpc_ich_init_gpio(struct pci_dev *dev)
 894 {
 895         struct lpc_ich_priv *priv = pci_get_drvdata(dev);
 896         u32 base_addr_cfg;
 897         u32 base_addr;
 898         int ret;
 899         bool acpi_conflict = false;
 900         struct resource *res;
 901
 902         /* Setup power management base register */
 903         pci_read_config_dword(dev, priv->abase, &base_addr_cfg);
 904         base_addr = base_addr_cfg & 0x0000ff80;
 905         if (!base_addr) {
 906                 dev_notice(&dev->dev, "I/O space for ACPI uninitialized\n");
 907                 lpc_ich_cells[LPC_GPIO].num_resources--;
 908                 goto gpe0_done;
 909         }
 910
 911         res = &gpio_ich_res[ICH_RES_GPE0];
 912         res->start = base_addr + ACPIBASE_GPE_OFF;
 913         res->end = base_addr + ACPIBASE_GPE_END;
 914         ret = acpi_check_resource_conflict(res);
 915         if (ret) {
 916                 /*
 917                  * This isn't fatal for the GPIO, but we have to make sure that
 918                  * the platform_device subsystem doesn't see this resource
 919                  * or it will register an invalid region.
 920                  */
 921                 lpc_ich_cells[LPC_GPIO].num_resources--;
 922                 acpi_conflict = true;
 923         } else {
 924                 lpc_ich_enable_acpi_space(dev);
 925         }
 926
 927 gpe0_done:
 928         /* Setup GPIO base register */
 929         pci_read_config_dword(dev, priv->gbase, &base_addr_cfg);
 930         base_addr = base_addr_cfg & 0x0000ff80;
 931         if (!base_addr) {
 932                 dev_notice(&dev->dev, "I/O space for GPIO uninitialized\n");
 933                 ret = -ENODEV;
 934                 goto gpio_done;
 935         }
 936
 937         /* Older devices provide fewer GPIO and have a smaller resource size. */
 938         res = &gpio_ich_res[ICH_RES_GPIO];
 939         res->start = base_addr;
 940         switch (lpc_chipset_info[priv->chipset].gpio_version) {
 941         case ICH_V5_GPIO:
 942         case ICH_V10CORP_GPIO:
 943                 res->end = res->start + 128 - 1;
 944                 break;
 945         default:
 946                 res->end = res->start + 64 - 1;
 947                 break;
 948         }
 949
 950         ret = lpc_ich_check_conflict_gpio(res);
 951         if (ret < 0) {
 952                 /* this isn't necessarily fatal for the GPIO */
 953                 acpi_conflict = true;
 954                 goto gpio_done;
 955         }
 956         lpc_chipset_info[priv->chipset].use_gpio = ret;
 957         lpc_ich_enable_gpio_space(dev);
 958
 959         lpc_ich_finalize_gpio_cell(dev);
 960         ret = mfd_add_devices(&dev->dev, PLATFORM_DEVID_AUTO,
 961                               &lpc_ich_cells[LPC_GPIO], 1, NULL, 0, NULL);
 962
 963 gpio_done:
 964         if (acpi_conflict)
 965                 pr_warn("Resource conflict(s) found affecting %s\n",
 966                                 lpc_ich_cells[LPC_GPIO].name);
 967         return ret;
 968 }
 969
 970 static int lpc_ich_init_wdt(struct pci_dev *dev)
 971 {
 972         struct lpc_ich_priv *priv = pci_get_drvdata(dev);
 973         u32 base_addr_cfg;
 974         u32 base_addr;
 975         int ret;
 976         struct resource *res;
 977
 978         /* Setup power management base register */
 979         pci_read_config_dword(dev, priv->abase, &base_addr_cfg);
 980         base_addr = base_addr_cfg & 0x0000ff80;
 981         if (!base_addr) {
 982                 dev_notice(&dev->dev, "I/O space for ACPI uninitialized\n");
 983                 ret = -ENODEV;
 984                 goto wdt_done;
 985         }
 986
 987         res = wdt_io_res(ICH_RES_IO_TCO);
 988         res->start = base_addr + ACPIBASE_TCO_OFF;
 989         res->end = base_addr + ACPIBASE_TCO_END;
 990
 991         res = wdt_io_res(ICH_RES_IO_SMI);
 992         res->start = base_addr + ACPIBASE_SMI_OFF;
 993         res->end = base_addr + ACPIBASE_SMI_END;
 994
 995         lpc_ich_enable_acpi_space(dev);
 996
 997         /*
 998          * iTCO v2:
 999          * Get the Memory-Mapped GCS register. To get access to it
1000          * we have to read RCBA from PCI Config space 0xf0 and use
1001          * it as base. GCS = RCBA + ICH6_GCS(0x3410).
1002          *
1003          * iTCO v3:
1004          * Get the Power Management Configuration register.  To get access
1005          * to it we have to read the PMC BASE from config space and address
1006          * the register at offset 0x8.
1007          */
1008         if (lpc_chipset_info[priv->chipset].iTCO_version == 1) {
1009                 /* Don't register iomem for TCO ver 1 */
1010                 lpc_ich_cells[LPC_WDT].num_resources--;
1011         } else if (lpc_chipset_info[priv->chipset].iTCO_version == 2) {
1012                 pci_read_config_dword(dev, RCBABASE, &base_addr_cfg);
1013                 base_addr = base_addr_cfg & 0xffffc000;
1014                 if (!(base_addr_cfg & 1)) {
1015                         dev_notice(&dev->dev, "RCBA is disabled by "
1016                                         "hardware/BIOS, device disabled\n");
1017                         ret = -ENODEV;
1018                         goto wdt_done;
1019                 }
1020                 res = wdt_mem_res(ICH_RES_MEM_GCS_PMC);
1021                 res->start = base_addr + ACPIBASE_GCS_OFF;
1022                 res->end = base_addr + ACPIBASE_GCS_END;
1023         } else if (lpc_chipset_info[priv->chipset].iTCO_version == 3) {
1024                 lpc_ich_enable_pmc_space(dev);
1025                 pci_read_config_dword(dev, ACPICTRL_PMCBASE, &base_addr_cfg);
1026                 base_addr = base_addr_cfg & 0xfffffe00;
1027
1028                 res = wdt_mem_res(ICH_RES_MEM_GCS_PMC);
1029                 res->start = base_addr + ACPIBASE_PMC_OFF;
1030                 res->end = base_addr + ACPIBASE_PMC_END;
1031         }
1032
1033         ret = lpc_ich_finalize_wdt_cell(dev);
1034         if (ret)
1035                 goto wdt_done;
1036
1037         ret = mfd_add_devices(&dev->dev, PLATFORM_DEVID_AUTO,
1038                               &lpc_ich_cells[LPC_WDT], 1, NULL, 0, NULL);
1039
1040 wdt_done:
1041         return ret;
1042 }
1043
1044 static int lpc_ich_probe(struct pci_dev *dev,
1045                                 const struct pci_device_id *id)
1046 {
1047         struct lpc_ich_priv *priv;
1048         int ret;
1049         bool cell_added = false;
1050
1051         priv = devm_kzalloc(&dev->dev,
1052                             sizeof(struct lpc_ich_priv), GFP_KERNEL);
1053         if (!priv)
1054                 return -ENOMEM;
1055
1056         priv->chipset = id->driver_data;
1057
1058         priv->actrl_pbase_save = -1;
1059         priv->abase_save = -1;
1060
1061         priv->abase = ACPIBASE;
1062         priv->actrl_pbase = ACPICTRL_PMCBASE;
1063
1064         priv->gctrl_save = -1;
1065         if (priv->chipset <= LPC_ICH5) {
1066                 priv->gbase = GPIOBASE_ICH0;
1067                 priv->gctrl = GPIOCTRL_ICH0;
1068         } else {
1069                 priv->gbase = GPIOBASE_ICH6;
1070                 priv->gctrl = GPIOCTRL_ICH6;
1071         }
1072
1073         pci_set_drvdata(dev, priv);
1074
1075         if (lpc_chipset_info[priv->chipset].iTCO_version) {
1076                 ret = lpc_ich_init_wdt(dev);
1077                 if (!ret)
1078                         cell_added = true;
1079         }
1080
1081         if (lpc_chipset_info[priv->chipset].gpio_version) {
1082                 ret = lpc_ich_init_gpio(dev);
1083                 if (!ret)
1084                         cell_added = true;
1085         }
1086
1087         /*
1088          * We only care if at least one or none of the cells registered
1089          * successfully.
1090          */
1091         if (!cell_added) {
1092                 dev_warn(&dev->dev, "No MFD cells added\n");
1093                 lpc_ich_restore_config_space(dev);
1094                 return -ENODEV;
1095         }
1096
1097         return 0;
1098 }
1099
1100 static void lpc_ich_remove(struct pci_dev *dev)
1101 {
1102         mfd_remove_devices(&dev->dev);
1103         lpc_ich_restore_config_space(dev);
1104 }
1105
1106 static struct pci_driver lpc_ich_driver = {
1107         .name           = "lpc_ich",
1108         .id_table       = lpc_ich_ids,
1109         .probe          = lpc_ich_probe,
1110         .remove         = lpc_ich_remove,
1111 };
1112
1113 module_pci_driver(lpc_ich_driver);
1114
1115 MODULE_AUTHOR("Aaron Sierra <asierra@xes-inc.com>");
1116 MODULE_DESCRIPTION("LPC interface for Intel ICH");
1117 MODULE_LICENSE("GPL");