drivers/mfd/kempld-core.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Kontron PLD MFD core driver
   4  *
   5  * Copyright (c) 2010-2013 Kontron Europe GmbH
   6  * Author: Michael Brunner <michael.brunner@kontron.com>
   7  */
   8
   9 #include <linux/err.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/mfd/core.h>
  12 #include <linux/mfd/kempld.h>
  13 #include <linux/mod_devicetable.h>
  14 #include <linux/module.h>
  15 #include <linux/property.h>
  16 #include <linux/dmi.h>
  17 #include <linux/io.h>
  18 #include <linux/delay.h>
  19 #include <linux/sysfs.h>
  20
  21 #define MAX_ID_LEN 4
  22 static char force_device_id[MAX_ID_LEN + 1] = "";
  23 module_param_string(force_device_id, force_device_id,
  24                     sizeof(force_device_id), 0);
  25 MODULE_PARM_DESC(force_device_id, "Override detected product");
  26
  27 /*
  28  * Get hardware mutex to block firmware from accessing the pld.
  29  * It is possible for the firmware may hold the mutex for an extended length of
  30  * time. This function will block until access has been granted.
  31  */
  32 static void kempld_get_hardware_mutex(struct kempld_device_data *pld)
  33 {
  34         /* The mutex bit will read 1 until access has been granted */
  35         while (ioread8(pld->io_index) & KEMPLD_MUTEX_KEY)
  36                 usleep_range(1000, 3000);
  37 }
  38
  39 static void kempld_release_hardware_mutex(struct kempld_device_data *pld)
  40 {
  41         /* The harware mutex is released when 1 is written to the mutex bit. */
  42         iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
  43 }
  44
  45 static int kempld_get_info_generic(struct kempld_device_data *pld)
  46 {
  47         u16 version;
  48         u8 spec;
  49
  50         kempld_get_mutex(pld);
  51
  52         version = kempld_read16(pld, KEMPLD_VERSION);
  53         spec = kempld_read8(pld, KEMPLD_SPEC);
  54         pld->info.buildnr = kempld_read16(pld, KEMPLD_BUILDNR);
  55
  56         pld->info.minor = KEMPLD_VERSION_GET_MINOR(version);
  57         pld->info.major = KEMPLD_VERSION_GET_MAJOR(version);
  58         pld->info.number = KEMPLD_VERSION_GET_NUMBER(version);
  59         pld->info.type = KEMPLD_VERSION_GET_TYPE(version);
  60
  61         if (spec == 0xff) {
  62                 pld->info.spec_minor = 0;
  63                 pld->info.spec_major = 1;
  64         } else {
  65                 pld->info.spec_minor = KEMPLD_SPEC_GET_MINOR(spec);
  66                 pld->info.spec_major = KEMPLD_SPEC_GET_MAJOR(spec);
  67         }
  68
  69         if (pld->info.spec_major > 0)
  70                 pld->feature_mask = kempld_read16(pld, KEMPLD_FEATURE);
  71         else
  72                 pld->feature_mask = 0;
  73
  74         kempld_release_mutex(pld);
  75
  76         return 0;
  77 }
  78
  79 enum kempld_cells {
  80         KEMPLD_I2C = 0,
  81         KEMPLD_WDT,
  82         KEMPLD_GPIO,
  83         KEMPLD_UART,
  84 };
  85
  86 static const char *kempld_dev_names[] = {
  87         [KEMPLD_I2C] = "kempld-i2c",
  88         [KEMPLD_WDT] = "kempld-wdt",
  89         [KEMPLD_GPIO] = "kempld-gpio",
  90         [KEMPLD_UART] = "kempld-uart",
  91 };
  92
  93 #define KEMPLD_MAX_DEVS ARRAY_SIZE(kempld_dev_names)
  94
  95 static int kempld_register_cells_generic(struct kempld_device_data *pld)
  96 {
  97         struct mfd_cell devs[KEMPLD_MAX_DEVS] = {};
  98         int i = 0;
  99
 100         if (pld->feature_mask & KEMPLD_FEATURE_BIT_I2C)
 101                 devs[i++].name = kempld_dev_names[KEMPLD_I2C];
 102
 103         if (pld->feature_mask & KEMPLD_FEATURE_BIT_WATCHDOG)
 104                 devs[i++].name = kempld_dev_names[KEMPLD_WDT];
 105
 106         if (pld->feature_mask & KEMPLD_FEATURE_BIT_GPIO)
 107                 devs[i++].name = kempld_dev_names[KEMPLD_GPIO];
 108
 109         if (pld->feature_mask & KEMPLD_FEATURE_MASK_UART)
 110                 devs[i++].name = kempld_dev_names[KEMPLD_UART];
 111
 112         return mfd_add_devices(pld->dev, PLATFORM_DEVID_NONE, devs, i, NULL, 0, NULL);
 113 }
 114
 115 static struct resource kempld_ioresource = {
 116         .start  = KEMPLD_IOINDEX,
 117         .end    = KEMPLD_IODATA,
 118         .flags  = IORESOURCE_IO,
 119 };
 120
 121 static const struct kempld_platform_data kempld_platform_data_generic = {
 122         .pld_clock              = KEMPLD_CLK,
 123         .ioresource             = &kempld_ioresource,
 124         .get_hardware_mutex     = kempld_get_hardware_mutex,
 125         .release_hardware_mutex = kempld_release_hardware_mutex,
 126         .get_info               = kempld_get_info_generic,
 127         .register_cells         = kempld_register_cells_generic,
 128 };
 129
 130 static struct platform_device *kempld_pdev;
 131
 132 static int kempld_create_platform_device(const struct kempld_platform_data *pdata)
 133 {
 134         const struct platform_device_info pdevinfo = {
 135                 .name = "kempld",
 136                 .id = PLATFORM_DEVID_NONE,
 137                 .res = pdata->ioresource,
 138                 .num_res = 1,
 139                 .data = pdata,
 140                 .size_data = sizeof(*pdata),
 141         };
 142
 143         kempld_pdev = platform_device_register_full(&pdevinfo);
 144         if (IS_ERR(kempld_pdev))
 145                 return PTR_ERR(kempld_pdev);
 146
 147         return 0;
 148 }
 149
 150 /**
 151  * kempld_read8 - read 8 bit register
 152  * @pld: kempld_device_data structure describing the PLD
 153  * @index: register index on the chip
 154  *
 155  * kempld_get_mutex must be called prior to calling this function.
 156  */
 157 u8 kempld_read8(struct kempld_device_data *pld, u8 index)
 158 {
 159         iowrite8(index, pld->io_index);
 160         return ioread8(pld->io_data);
 161 }
 162 EXPORT_SYMBOL_GPL(kempld_read8);
 163
 164 /**
 165  * kempld_write8 - write 8 bit register
 166  * @pld: kempld_device_data structure describing the PLD
 167  * @index: register index on the chip
 168  * @data: new register value
 169  *
 170  * kempld_get_mutex must be called prior to calling this function.
 171  */
 172 void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data)
 173 {
 174         iowrite8(index, pld->io_index);
 175         iowrite8(data, pld->io_data);
 176 }
 177 EXPORT_SYMBOL_GPL(kempld_write8);
 178
 179 /**
 180  * kempld_read16 - read 16 bit register
 181  * @pld: kempld_device_data structure describing the PLD
 182  * @index: register index on the chip
 183  *
 184  * kempld_get_mutex must be called prior to calling this function.
 185  */
 186 u16 kempld_read16(struct kempld_device_data *pld, u8 index)
 187 {
 188         return kempld_read8(pld, index) | kempld_read8(pld, index + 1) << 8;
 189 }
 190 EXPORT_SYMBOL_GPL(kempld_read16);
 191
 192 /**
 193  * kempld_write16 - write 16 bit register
 194  * @pld: kempld_device_data structure describing the PLD
 195  * @index: register index on the chip
 196  * @data: new register value
 197  *
 198  * kempld_get_mutex must be called prior to calling this function.
 199  */
 200 void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data)
 201 {
 202         kempld_write8(pld, index, (u8)data);
 203         kempld_write8(pld, index + 1, (u8)(data >> 8));
 204 }
 205 EXPORT_SYMBOL_GPL(kempld_write16);
 206
 207 /**
 208  * kempld_read32 - read 32 bit register
 209  * @pld: kempld_device_data structure describing the PLD
 210  * @index: register index on the chip
 211  *
 212  * kempld_get_mutex must be called prior to calling this function.
 213  */
 214 u32 kempld_read32(struct kempld_device_data *pld, u8 index)
 215 {
 216         return kempld_read16(pld, index) | kempld_read16(pld, index + 2) << 16;
 217 }
 218 EXPORT_SYMBOL_GPL(kempld_read32);
 219
 220 /**
 221  * kempld_write32 - write 32 bit register
 222  * @pld: kempld_device_data structure describing the PLD
 223  * @index: register index on the chip
 224  * @data: new register value
 225  *
 226  * kempld_get_mutex must be called prior to calling this function.
 227  */
 228 void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data)
 229 {
 230         kempld_write16(pld, index, (u16)data);
 231         kempld_write16(pld, index + 2, (u16)(data >> 16));
 232 }
 233 EXPORT_SYMBOL_GPL(kempld_write32);
 234
 235 /**
 236  * kempld_get_mutex - acquire PLD mutex
 237  * @pld: kempld_device_data structure describing the PLD
 238  */
 239 void kempld_get_mutex(struct kempld_device_data *pld)
 240 {
 241         const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
 242
 243         mutex_lock(&pld->lock);
 244         pdata->get_hardware_mutex(pld);
 245 }
 246 EXPORT_SYMBOL_GPL(kempld_get_mutex);
 247
 248 /**
 249  * kempld_release_mutex - release PLD mutex
 250  * @pld: kempld_device_data structure describing the PLD
 251  */
 252 void kempld_release_mutex(struct kempld_device_data *pld)
 253 {
 254         const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
 255
 256         pdata->release_hardware_mutex(pld);
 257         mutex_unlock(&pld->lock);
 258 }
 259 EXPORT_SYMBOL_GPL(kempld_release_mutex);
 260
 261 /**
 262  * kempld_get_info - update device specific information
 263  * @pld: kempld_device_data structure describing the PLD
 264  *
 265  * This function calls the configured board specific kempld_get_info_XXXX
 266  * function which is responsible for gathering information about the specific
 267  * hardware. The information is then stored within the pld structure.
 268  */
 269 static int kempld_get_info(struct kempld_device_data *pld)
 270 {
 271         int ret;
 272         const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
 273         char major, minor;
 274
 275         ret = pdata->get_info(pld);
 276         if (ret)
 277                 return ret;
 278
 279         /* The Kontron PLD firmware version string has the following format:
 280          * Pwxy.zzzz
 281          *   P:    Fixed
 282          *   w:    PLD number    - 1 hex digit
 283          *   x:    Major version - 1 alphanumerical digit (0-9A-V)
 284          *   y:    Minor version - 1 alphanumerical digit (0-9A-V)
 285          *   zzzz: Build number  - 4 zero padded hex digits */
 286
 287         if (pld->info.major < 10)
 288                 major = pld->info.major + '0';
 289         else
 290                 major = (pld->info.major - 10) + 'A';
 291         if (pld->info.minor < 10)
 292                 minor = pld->info.minor + '0';
 293         else
 294                 minor = (pld->info.minor - 10) + 'A';
 295
 296         scnprintf(pld->info.version, sizeof(pld->info.version), "P%X%c%c.%04X",
 297                   pld->info.number, major, minor, pld->info.buildnr);
 298
 299         return 0;
 300 }
 301
 302 /*
 303  * kempld_register_cells - register cell drivers
 304  *
 305  * This function registers cell drivers for the detected hardware by calling
 306  * the configured kempld_register_cells_XXXX function which is responsible
 307  * to detect and register the needed cell drivers.
 308  */
 309 static int kempld_register_cells(struct kempld_device_data *pld)
 310 {
 311         const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
 312
 313         return pdata->register_cells(pld);
 314 }
 315
 316 static const char *kempld_get_type_string(struct kempld_device_data *pld)
 317 {
 318         const char *version_type;
 319
 320         switch (pld->info.type) {
 321         case 0:
 322                 version_type = "release";
 323                 break;
 324         case 1:
 325                 version_type = "debug";
 326                 break;
 327         case 2:
 328                 version_type = "custom";
 329                 break;
 330         default:
 331                 version_type = "unspecified";
 332                 break;
 333         }
 334
 335         return version_type;
 336 }
 337
 338 static ssize_t pld_version_show(struct device *dev,
 339                                 struct device_attribute *attr, char *buf)
 340 {
 341         struct kempld_device_data *pld = dev_get_drvdata(dev);
 342
 343         return sysfs_emit(buf, "%s\n", pld->info.version);
 344 }
 345
 346 static ssize_t pld_specification_show(struct device *dev,
 347                                       struct device_attribute *attr, char *buf)
 348 {
 349         struct kempld_device_data *pld = dev_get_drvdata(dev);
 350
 351         return sysfs_emit(buf, "%d.%d\n", pld->info.spec_major, pld->info.spec_minor);
 352 }
 353
 354 static ssize_t pld_type_show(struct device *dev,
 355                              struct device_attribute *attr, char *buf)
 356 {
 357         struct kempld_device_data *pld = dev_get_drvdata(dev);
 358
 359         return sysfs_emit(buf, "%s\n", kempld_get_type_string(pld));
 360 }
 361
 362 static DEVICE_ATTR_RO(pld_version);
 363 static DEVICE_ATTR_RO(pld_specification);
 364 static DEVICE_ATTR_RO(pld_type);
 365
 366 static struct attribute *pld_attrs[] = {
 367         &dev_attr_pld_version.attr,
 368         &dev_attr_pld_specification.attr,
 369         &dev_attr_pld_type.attr,
 370         NULL
 371 };
 372 ATTRIBUTE_GROUPS(pld);
 373
 374 static int kempld_detect_device(struct kempld_device_data *pld)
 375 {
 376         u8 index_reg;
 377         int ret;
 378
 379         mutex_lock(&pld->lock);
 380
 381         /* Check for empty IO space */
 382         index_reg = ioread8(pld->io_index);
 383         if (index_reg == 0xff && ioread8(pld->io_data) == 0xff) {
 384                 mutex_unlock(&pld->lock);
 385                 return -ENODEV;
 386         }
 387
 388         /* Release hardware mutex if acquired */
 389         if (!(index_reg & KEMPLD_MUTEX_KEY)) {
 390                 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
 391                 /* PXT and COMe-cPC2 boards may require a second release */
 392                 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
 393         }
 394
 395         mutex_unlock(&pld->lock);
 396
 397         ret = kempld_get_info(pld);
 398         if (ret)
 399                 return ret;
 400
 401         dev_info(pld->dev, "Found Kontron PLD - %s (%s), spec %d.%d\n",
 402                  pld->info.version, kempld_get_type_string(pld),
 403                  pld->info.spec_major, pld->info.spec_minor);
 404
 405         return kempld_register_cells(pld);
 406 }
 407
 408 static int kempld_probe(struct platform_device *pdev)
 409 {
 410         const struct kempld_platform_data *pdata;
 411         struct device *dev = &pdev->dev;
 412         struct kempld_device_data *pld;
 413         struct resource *ioport;
 414         int ret;
 415
 416         if (IS_ERR_OR_NULL(kempld_pdev)) {
 417                 /*
 418                  * No kempld_pdev device has been registered in kempld_init,
 419                  * so we seem to be probing an ACPI platform device.
 420                  */
 421                 pdata = device_get_match_data(dev);
 422                 if (!pdata)
 423                         return -ENODEV;
 424
 425                 ret = platform_device_add_data(pdev, pdata, sizeof(*pdata));
 426                 if (ret)
 427                         return ret;
 428         } else if (kempld_pdev == pdev) {
 429                 pdata = dev_get_platdata(dev);
 430         } else {
 431                 /*
 432                  * The platform device we are probing is not the one we
 433                  * registered in kempld_init using the DMI table, so this one
 434                  * comes from ACPI.
 435                  * As we can only probe one - abort here and use the DMI
 436                  * based one instead.
 437                  */
 438                 dev_notice(dev, "platform device exists - not using ACPI\n");
 439                 return -ENODEV;
 440         }
 441
 442         pld = devm_kzalloc(dev, sizeof(*pld), GFP_KERNEL);
 443         if (!pld)
 444                 return -ENOMEM;
 445
 446         ioport = platform_get_resource(pdev, IORESOURCE_IO, 0);
 447         if (!ioport)
 448                 return -EINVAL;
 449
 450         pld->io_base = devm_ioport_map(dev, ioport->start,
 451                                         resource_size(ioport));
 452         if (!pld->io_base)
 453                 return -ENOMEM;
 454
 455         pld->io_index = pld->io_base;
 456         pld->io_data = pld->io_base + 1;
 457         pld->pld_clock = pdata->pld_clock;
 458         pld->dev = dev;
 459
 460         mutex_init(&pld->lock);
 461         platform_set_drvdata(pdev, pld);
 462
 463         return kempld_detect_device(pld);
 464 }
 465
 466 static void kempld_remove(struct platform_device *pdev)
 467 {
 468         struct kempld_device_data *pld = platform_get_drvdata(pdev);
 469         const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
 470
 471         mfd_remove_devices(&pdev->dev);
 472         pdata->release_hardware_mutex(pld);
 473 }
 474
 475 static const struct acpi_device_id kempld_acpi_table[] = {
 476         { "KEM0000", (kernel_ulong_t)&kempld_platform_data_generic },
 477         { "KEM0001", (kernel_ulong_t)&kempld_platform_data_generic },
 478         {}
 479 };
 480 MODULE_DEVICE_TABLE(acpi, kempld_acpi_table);
 481
 482 static struct platform_driver kempld_driver = {
 483         .driver         = {
 484                 .name   = "kempld",
 485                 .acpi_match_table = kempld_acpi_table,
 486                 .dev_groups       = pld_groups,
 487         },
 488         .probe          = kempld_probe,
 489         .remove_new     = kempld_remove,
 490 };
 491
 492 static const struct dmi_system_id kempld_dmi_table[] __initconst = {
 493         {
 494                 .ident = "BBD6",
 495                 .matches = {
 496                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 497                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bBD"),
 498                 },
 499         }, {
 500                 .ident = "BBL6",
 501                 .matches = {
 502                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 503                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bBL6"),
 504                 },
 505         }, {
 506                 .ident = "BDV7",
 507                 .matches = {
 508                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 509                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bDV7"),
 510                 },
 511         }, {
 512                 .ident = "BHL6",
 513                 .matches = {
 514                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 515                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bHL6"),
 516                 },
 517         }, {
 518                 .ident = "BKL6",
 519                 .matches = {
 520                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 521                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bKL6"),
 522                 },
 523         }, {
 524                 .ident = "BSL6",
 525                 .matches = {
 526                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 527                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bSL6"),
 528                 },
 529         }, {
 530                 .ident = "CAL6",
 531                 .matches = {
 532                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 533                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cAL"),
 534                 },
 535         }, {
 536                 .ident = "CBL6",
 537                 .matches = {
 538                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 539                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cBL6"),
 540                 },
 541         }, {
 542                 .ident = "CBW6",
 543                 .matches = {
 544                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 545                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cBW6"),
 546                 },
 547         }, {
 548                 .ident = "CCR2",
 549                 .matches = {
 550                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 551                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP2"),
 552                 },
 553         }, {
 554                 .ident = "CCR6",
 555                 .matches = {
 556                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 557                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP6"),
 558                 },
 559         }, {
 560                 .ident = "CDV7",
 561                 .matches = {
 562                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 563                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cDV7"),
 564                 },
 565         }, {
 566                 .ident = "CHL6",
 567                 .matches = {
 568                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 569                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cHL6"),
 570                 },
 571         }, {
 572                 .ident = "CHR2",
 573                 .matches = {
 574                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 575                         DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T2"),
 576                 },
 577         }, {
 578                 .ident = "CHR2",
 579                 .matches = {
 580                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 581                         DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T2"),
 582                 },
 583         }, {
 584                 .ident = "CHR2",
 585                 .matches = {
 586                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 587                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC2"),
 588                 },
 589         }, {
 590                 .ident = "CHR6",
 591                 .matches = {
 592                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 593                         DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T6"),
 594                 },
 595         }, {
 596                 .ident = "CHR6",
 597                 .matches = {
 598                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 599                         DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T6"),
 600                 },
 601         }, {
 602                 .ident = "CHR6",
 603                 .matches = {
 604                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 605                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC6"),
 606                 },
 607         }, {
 608                 .ident = "CKL6",
 609                 .matches = {
 610                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 611                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cKL6"),
 612                 },
 613         }, {
 614                 .ident = "CNTG",
 615                 .matches = {
 616                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 617                         DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-PC"),
 618                 },
 619         }, {
 620                 .ident = "CNTG",
 621                 .matches = {
 622                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 623                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bPC2"),
 624                 },
 625         }, {
 626                 .ident = "CNTX",
 627                 .matches = {
 628                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 629                         DMI_MATCH(DMI_BOARD_NAME, "PXT"),
 630                 },
 631         }, {
 632                 .ident = "CSL6",
 633                 .matches = {
 634                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 635                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cSL6"),
 636                 },
 637         }, {
 638                 .ident = "CVV6",
 639                 .matches = {
 640                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 641                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cBT"),
 642                 },
 643         }, {
 644                 .ident = "FRI2",
 645                 .matches = {
 646                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 647                         DMI_MATCH(DMI_BIOS_VERSION, "FRI2"),
 648                 },
 649         }, {
 650                 .ident = "FRI2",
 651                 .matches = {
 652                         DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"),
 653                 },
 654         }, {
 655                 .ident = "A203",
 656                 .matches = {
 657                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 658                         DMI_MATCH(DMI_BOARD_NAME, "KBox A-203"),
 659                 },
 660         }, {
 661                 .ident = "M4A1",
 662                 .matches = {
 663                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 664                         DMI_MATCH(DMI_BOARD_NAME, "COMe-m4AL"),
 665                 },
 666         }, {
 667                 .ident = "MAL1",
 668                 .matches = {
 669                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 670                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mAL10"),
 671                 },
 672         }, {
 673                 .ident = "MAPL",
 674                 .matches = {
 675                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 676                         DMI_MATCH(DMI_BOARD_NAME, "mITX-APL"),
 677                 },
 678         }, {
 679                 .ident = "MBR1",
 680                 .matches = {
 681                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 682                         DMI_MATCH(DMI_BOARD_NAME, "ETX-OH"),
 683                 },
 684         }, {
 685                 .ident = "MVV1",
 686                 .matches = {
 687                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 688                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mBT"),
 689                 },
 690         }, {
 691                 .ident = "NTC1",
 692                 .matches = {
 693                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 694                         DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"),
 695                 },
 696         }, {
 697                 .ident = "NTC1",
 698                 .matches = {
 699                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 700                         DMI_MATCH(DMI_BOARD_NAME, "nETXe-TT"),
 701                 },
 702         }, {
 703                 .ident = "NTC1",
 704                 .matches = {
 705                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 706                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"),
 707                 },
 708         }, {
 709                 .ident = "NUP1",
 710                 .matches = {
 711                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 712                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mCT"),
 713                 },
 714         }, {
 715                 .ident = "PAPL",
 716                 .matches = {
 717                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 718                         DMI_MATCH(DMI_BOARD_NAME, "pITX-APL"),
 719                 },
 720         }, {
 721                 .ident = "SXAL",
 722                 .matches = {
 723                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 724                         DMI_MATCH(DMI_BOARD_NAME, "SMARC-sXAL"),
 725                 },
 726         }, {
 727                 .ident = "SXAL4",
 728                 .matches = {
 729                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 730                         DMI_MATCH(DMI_BOARD_NAME, "SMARC-sXA4"),
 731                 },
 732         }, {
 733                 .ident = "UNP1",
 734                 .matches = {
 735                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 736                         DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-DC"),
 737                 },
 738         }, {
 739                 .ident = "UNP1",
 740                 .matches = {
 741                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 742                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cDC2"),
 743                 },
 744         }, {
 745                 .ident = "UNTG",
 746                 .matches = {
 747                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 748                         DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-PC"),
 749                 },
 750         }, {
 751                 .ident = "UNTG",
 752                 .matches = {
 753                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 754                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cPC2"),
 755                 },
 756         }, {
 757                 .ident = "UUP6",
 758                 .matches = {
 759                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 760                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cCT6"),
 761                 },
 762         }, {
 763                 .ident = "UTH6",
 764                 .matches = {
 765                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 766                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cTH6"),
 767                 },
 768         }, {
 769                 .ident = "Q7AL",
 770                 .matches = {
 771                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 772                         DMI_MATCH(DMI_BOARD_NAME, "Qseven-Q7AL"),
 773                 },
 774         },
 775         {}
 776 };
 777 MODULE_DEVICE_TABLE(dmi, kempld_dmi_table);
 778
 779 static int __init kempld_init(void)
 780 {
 781         const struct dmi_system_id *id;
 782         int ret = -ENODEV;
 783
 784         for (id = dmi_first_match(kempld_dmi_table); id; id = dmi_first_match(id + 1)) {
 785                 /* Check, if user asked for the exact device ID match */
 786                 if (force_device_id[0] && !strstr(id->ident, force_device_id))
 787                         continue;
 788
 789                 ret = kempld_create_platform_device(&kempld_platform_data_generic);
 790                 if (ret)
 791                         continue;
 792
 793                 break;
 794         }
 795         if (ret)
 796                 return ret;
 797
 798         return platform_driver_register(&kempld_driver);
 799 }
 800
 801 static void __exit kempld_exit(void)
 802 {
 803         platform_device_unregister(kempld_pdev);
 804         platform_driver_unregister(&kempld_driver);
 805 }
 806
 807 module_init(kempld_init);
 808 module_exit(kempld_exit);
 809
 810 MODULE_DESCRIPTION("KEM PLD Core Driver");
 811 MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>");
 812 MODULE_LICENSE("GPL");
 813 MODULE_ALIAS("platform:kempld-core");