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/platform_device.h>
  10 #include <linux/mfd/core.h>
  11 #include <linux/mfd/kempld.h>
  12 #include <linux/module.h>
  13 #include <linux/dmi.h>
  14 #include <linux/io.h>
  15 #include <linux/delay.h>
  16 #include <linux/acpi.h>
  17
  18 #define MAX_ID_LEN 4
  19 static char force_device_id[MAX_ID_LEN + 1] = "";
  20 module_param_string(force_device_id, force_device_id,
  21                     sizeof(force_device_id), 0);
  22 MODULE_PARM_DESC(force_device_id, "Override detected product");
  23
  24 /*
  25  * Get hardware mutex to block firmware from accessing the pld.
  26  * It is possible for the firmware may hold the mutex for an extended length of
  27  * time. This function will block until access has been granted.
  28  */
  29 static void kempld_get_hardware_mutex(struct kempld_device_data *pld)
  30 {
  31         /* The mutex bit will read 1 until access has been granted */
  32         while (ioread8(pld->io_index) & KEMPLD_MUTEX_KEY)
  33                 usleep_range(1000, 3000);
  34 }
  35
  36 static void kempld_release_hardware_mutex(struct kempld_device_data *pld)
  37 {
  38         /* The harware mutex is released when 1 is written to the mutex bit. */
  39         iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
  40 }
  41
  42 static int kempld_get_info_generic(struct kempld_device_data *pld)
  43 {
  44         u16 version;
  45         u8 spec;
  46
  47         kempld_get_mutex(pld);
  48
  49         version = kempld_read16(pld, KEMPLD_VERSION);
  50         spec = kempld_read8(pld, KEMPLD_SPEC);
  51         pld->info.buildnr = kempld_read16(pld, KEMPLD_BUILDNR);
  52
  53         pld->info.minor = KEMPLD_VERSION_GET_MINOR(version);
  54         pld->info.major = KEMPLD_VERSION_GET_MAJOR(version);
  55         pld->info.number = KEMPLD_VERSION_GET_NUMBER(version);
  56         pld->info.type = KEMPLD_VERSION_GET_TYPE(version);
  57
  58         if (spec == 0xff) {
  59                 pld->info.spec_minor = 0;
  60                 pld->info.spec_major = 1;
  61         } else {
  62                 pld->info.spec_minor = KEMPLD_SPEC_GET_MINOR(spec);
  63                 pld->info.spec_major = KEMPLD_SPEC_GET_MAJOR(spec);
  64         }
  65
  66         if (pld->info.spec_major > 0)
  67                 pld->feature_mask = kempld_read16(pld, KEMPLD_FEATURE);
  68         else
  69                 pld->feature_mask = 0;
  70
  71         kempld_release_mutex(pld);
  72
  73         return 0;
  74 }
  75
  76 enum kempld_cells {
  77         KEMPLD_I2C = 0,
  78         KEMPLD_WDT,
  79         KEMPLD_GPIO,
  80         KEMPLD_UART,
  81 };
  82
  83 static const char *kempld_dev_names[] = {
  84         [KEMPLD_I2C] = "kempld-i2c",
  85         [KEMPLD_WDT] = "kempld-wdt",
  86         [KEMPLD_GPIO] = "kempld-gpio",
  87         [KEMPLD_UART] = "kempld-uart",
  88 };
  89
  90 #define KEMPLD_MAX_DEVS ARRAY_SIZE(kempld_dev_names)
  91
  92 static int kempld_register_cells_generic(struct kempld_device_data *pld)
  93 {
  94         struct mfd_cell devs[KEMPLD_MAX_DEVS] = {};
  95         int i = 0;
  96
  97         if (pld->feature_mask & KEMPLD_FEATURE_BIT_I2C)
  98                 devs[i++].name = kempld_dev_names[KEMPLD_I2C];
  99
 100         if (pld->feature_mask & KEMPLD_FEATURE_BIT_WATCHDOG)
 101                 devs[i++].name = kempld_dev_names[KEMPLD_WDT];
 102
 103         if (pld->feature_mask & KEMPLD_FEATURE_BIT_GPIO)
 104                 devs[i++].name = kempld_dev_names[KEMPLD_GPIO];
 105
 106         if (pld->feature_mask & KEMPLD_FEATURE_MASK_UART)
 107                 devs[i++].name = kempld_dev_names[KEMPLD_UART];
 108
 109         return mfd_add_devices(pld->dev, -1, devs, i, NULL, 0, NULL);
 110 }
 111
 112 static struct resource kempld_ioresource = {
 113         .start  = KEMPLD_IOINDEX,
 114         .end    = KEMPLD_IODATA,
 115         .flags  = IORESOURCE_IO,
 116 };
 117
 118 static const struct kempld_platform_data kempld_platform_data_generic = {
 119         .pld_clock              = KEMPLD_CLK,
 120         .ioresource             = &kempld_ioresource,
 121         .get_hardware_mutex     = kempld_get_hardware_mutex,
 122         .release_hardware_mutex = kempld_release_hardware_mutex,
 123         .get_info               = kempld_get_info_generic,
 124         .register_cells         = kempld_register_cells_generic,
 125 };
 126
 127 static struct platform_device *kempld_pdev;
 128
 129 static int kempld_create_platform_device(const struct dmi_system_id *id)
 130 {
 131         const struct kempld_platform_data *pdata = id->driver_data;
 132         int ret;
 133
 134         kempld_pdev = platform_device_alloc("kempld", -1);
 135         if (!kempld_pdev)
 136                 return -ENOMEM;
 137
 138         ret = platform_device_add_data(kempld_pdev, pdata, sizeof(*pdata));
 139         if (ret)
 140                 goto err;
 141
 142         ret = platform_device_add_resources(kempld_pdev, pdata->ioresource, 1);
 143         if (ret)
 144                 goto err;
 145
 146         ret = platform_device_add(kempld_pdev);
 147         if (ret)
 148                 goto err;
 149
 150         return 0;
 151 err:
 152         platform_device_put(kempld_pdev);
 153         return ret;
 154 }
 155
 156 /**
 157  * kempld_read8 - read 8 bit register
 158  * @pld: kempld_device_data structure describing the PLD
 159  * @index: register index on the chip
 160  *
 161  * kempld_get_mutex must be called prior to calling this function.
 162  */
 163 u8 kempld_read8(struct kempld_device_data *pld, u8 index)
 164 {
 165         iowrite8(index, pld->io_index);
 166         return ioread8(pld->io_data);
 167 }
 168 EXPORT_SYMBOL_GPL(kempld_read8);
 169
 170 /**
 171  * kempld_write8 - write 8 bit register
 172  * @pld: kempld_device_data structure describing the PLD
 173  * @index: register index on the chip
 174  * @data: new register value
 175  *
 176  * kempld_get_mutex must be called prior to calling this function.
 177  */
 178 void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data)
 179 {
 180         iowrite8(index, pld->io_index);
 181         iowrite8(data, pld->io_data);
 182 }
 183 EXPORT_SYMBOL_GPL(kempld_write8);
 184
 185 /**
 186  * kempld_read16 - read 16 bit register
 187  * @pld: kempld_device_data structure describing the PLD
 188  * @index: register index on the chip
 189  *
 190  * kempld_get_mutex must be called prior to calling this function.
 191  */
 192 u16 kempld_read16(struct kempld_device_data *pld, u8 index)
 193 {
 194         return kempld_read8(pld, index) | kempld_read8(pld, index + 1) << 8;
 195 }
 196 EXPORT_SYMBOL_GPL(kempld_read16);
 197
 198 /**
 199  * kempld_write16 - write 16 bit register
 200  * @pld: kempld_device_data structure describing the PLD
 201  * @index: register index on the chip
 202  * @data: new register value
 203  *
 204  * kempld_get_mutex must be called prior to calling this function.
 205  */
 206 void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data)
 207 {
 208         kempld_write8(pld, index, (u8)data);
 209         kempld_write8(pld, index + 1, (u8)(data >> 8));
 210 }
 211 EXPORT_SYMBOL_GPL(kempld_write16);
 212
 213 /**
 214  * kempld_read32 - read 32 bit register
 215  * @pld: kempld_device_data structure describing the PLD
 216  * @index: register index on the chip
 217  *
 218  * kempld_get_mutex must be called prior to calling this function.
 219  */
 220 u32 kempld_read32(struct kempld_device_data *pld, u8 index)
 221 {
 222         return kempld_read16(pld, index) | kempld_read16(pld, index + 2) << 16;
 223 }
 224 EXPORT_SYMBOL_GPL(kempld_read32);
 225
 226 /**
 227  * kempld_write32 - write 32 bit register
 228  * @pld: kempld_device_data structure describing the PLD
 229  * @index: register index on the chip
 230  * @data: new register value
 231  *
 232  * kempld_get_mutex must be called prior to calling this function.
 233  */
 234 void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data)
 235 {
 236         kempld_write16(pld, index, (u16)data);
 237         kempld_write16(pld, index + 2, (u16)(data >> 16));
 238 }
 239 EXPORT_SYMBOL_GPL(kempld_write32);
 240
 241 /**
 242  * kempld_get_mutex - acquire PLD mutex
 243  * @pld: kempld_device_data structure describing the PLD
 244  */
 245 void kempld_get_mutex(struct kempld_device_data *pld)
 246 {
 247         const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
 248
 249         mutex_lock(&pld->lock);
 250         pdata->get_hardware_mutex(pld);
 251 }
 252 EXPORT_SYMBOL_GPL(kempld_get_mutex);
 253
 254 /**
 255  * kempld_release_mutex - release PLD mutex
 256  * @pld: kempld_device_data structure describing the PLD
 257  */
 258 void kempld_release_mutex(struct kempld_device_data *pld)
 259 {
 260         const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
 261
 262         pdata->release_hardware_mutex(pld);
 263         mutex_unlock(&pld->lock);
 264 }
 265 EXPORT_SYMBOL_GPL(kempld_release_mutex);
 266
 267 /**
 268  * kempld_get_info - update device specific information
 269  * @pld: kempld_device_data structure describing the PLD
 270  *
 271  * This function calls the configured board specific kempld_get_info_XXXX
 272  * function which is responsible for gathering information about the specific
 273  * hardware. The information is then stored within the pld structure.
 274  */
 275 static int kempld_get_info(struct kempld_device_data *pld)
 276 {
 277         int ret;
 278         const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
 279         char major, minor;
 280
 281         ret = pdata->get_info(pld);
 282         if (ret)
 283                 return ret;
 284
 285         /* The Kontron PLD firmware version string has the following format:
 286          * Pwxy.zzzz
 287          *   P:    Fixed
 288          *   w:    PLD number    - 1 hex digit
 289          *   x:    Major version - 1 alphanumerical digit (0-9A-V)
 290          *   y:    Minor version - 1 alphanumerical digit (0-9A-V)
 291          *   zzzz: Build number  - 4 zero padded hex digits */
 292
 293         if (pld->info.major < 10)
 294                 major = pld->info.major + '0';
 295         else
 296                 major = (pld->info.major - 10) + 'A';
 297         if (pld->info.minor < 10)
 298                 minor = pld->info.minor + '0';
 299         else
 300                 minor = (pld->info.minor - 10) + 'A';
 301
 302         ret = scnprintf(pld->info.version, sizeof(pld->info.version),
 303                         "P%X%c%c.%04X", pld->info.number, major, minor,
 304                         pld->info.buildnr);
 305         if (ret < 0)
 306                 return ret;
 307
 308         return 0;
 309 }
 310
 311 /*
 312  * kempld_register_cells - register cell drivers
 313  *
 314  * This function registers cell drivers for the detected hardware by calling
 315  * the configured kempld_register_cells_XXXX function which is responsible
 316  * to detect and register the needed cell drivers.
 317  */
 318 static int kempld_register_cells(struct kempld_device_data *pld)
 319 {
 320         const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
 321
 322         return pdata->register_cells(pld);
 323 }
 324
 325 static const char *kempld_get_type_string(struct kempld_device_data *pld)
 326 {
 327         const char *version_type;
 328
 329         switch (pld->info.type) {
 330         case 0:
 331                 version_type = "release";
 332                 break;
 333         case 1:
 334                 version_type = "debug";
 335                 break;
 336         case 2:
 337                 version_type = "custom";
 338                 break;
 339         default:
 340                 version_type = "unspecified";
 341                 break;
 342         }
 343
 344         return version_type;
 345 }
 346
 347 static ssize_t pld_version_show(struct device *dev,
 348                                 struct device_attribute *attr, char *buf)
 349 {
 350         struct kempld_device_data *pld = dev_get_drvdata(dev);
 351
 352         return sysfs_emit(buf, "%s\n", pld->info.version);
 353 }
 354
 355 static ssize_t pld_specification_show(struct device *dev,
 356                                       struct device_attribute *attr, char *buf)
 357 {
 358         struct kempld_device_data *pld = dev_get_drvdata(dev);
 359
 360         return sysfs_emit(buf, "%d.%d\n", pld->info.spec_major, pld->info.spec_minor);
 361 }
 362
 363 static ssize_t pld_type_show(struct device *dev,
 364                              struct device_attribute *attr, char *buf)
 365 {
 366         struct kempld_device_data *pld = dev_get_drvdata(dev);
 367
 368         return sysfs_emit(buf, "%s\n", kempld_get_type_string(pld));
 369 }
 370
 371 static DEVICE_ATTR_RO(pld_version);
 372 static DEVICE_ATTR_RO(pld_specification);
 373 static DEVICE_ATTR_RO(pld_type);
 374
 375 static struct attribute *pld_attributes[] = {
 376         &dev_attr_pld_version.attr,
 377         &dev_attr_pld_specification.attr,
 378         &dev_attr_pld_type.attr,
 379         NULL
 380 };
 381
 382 static const struct attribute_group pld_attr_group = {
 383         .attrs = pld_attributes,
 384 };
 385
 386 static int kempld_detect_device(struct kempld_device_data *pld)
 387 {
 388         u8 index_reg;
 389         int ret;
 390
 391         mutex_lock(&pld->lock);
 392
 393         /* Check for empty IO space */
 394         index_reg = ioread8(pld->io_index);
 395         if (index_reg == 0xff && ioread8(pld->io_data) == 0xff) {
 396                 mutex_unlock(&pld->lock);
 397                 return -ENODEV;
 398         }
 399
 400         /* Release hardware mutex if acquired */
 401         if (!(index_reg & KEMPLD_MUTEX_KEY)) {
 402                 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
 403                 /* PXT and COMe-cPC2 boards may require a second release */
 404                 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
 405         }
 406
 407         mutex_unlock(&pld->lock);
 408
 409         ret = kempld_get_info(pld);
 410         if (ret)
 411                 return ret;
 412
 413         dev_info(pld->dev, "Found Kontron PLD - %s (%s), spec %d.%d\n",
 414                  pld->info.version, kempld_get_type_string(pld),
 415                  pld->info.spec_major, pld->info.spec_minor);
 416
 417         ret = sysfs_create_group(&pld->dev->kobj, &pld_attr_group);
 418         if (ret)
 419                 return ret;
 420
 421         ret = kempld_register_cells(pld);
 422         if (ret)
 423                 sysfs_remove_group(&pld->dev->kobj, &pld_attr_group);
 424
 425         return ret;
 426 }
 427
 428 #ifdef CONFIG_ACPI
 429 static int kempld_get_acpi_data(struct platform_device *pdev)
 430 {
 431         struct list_head resource_list;
 432         struct resource *resources;
 433         struct resource_entry *rentry;
 434         struct device *dev = &pdev->dev;
 435         struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
 436         const struct kempld_platform_data *pdata;
 437         int ret;
 438         int count;
 439
 440         pdata = acpi_device_get_match_data(dev);
 441         ret = platform_device_add_data(pdev, pdata,
 442                                        sizeof(struct kempld_platform_data));
 443         if (ret)
 444                 return ret;
 445
 446         INIT_LIST_HEAD(&resource_list);
 447         ret = acpi_dev_get_resources(acpi_dev, &resource_list, NULL, NULL);
 448         if (ret < 0)
 449                 goto out;
 450
 451         count = ret;
 452
 453         if (count == 0) {
 454                 ret = platform_device_add_resources(pdev, pdata->ioresource, 1);
 455                 goto out;
 456         }
 457
 458         resources = devm_kcalloc(&acpi_dev->dev, count, sizeof(*resources),
 459                                  GFP_KERNEL);
 460         if (!resources) {
 461                 ret = -ENOMEM;
 462                 goto out;
 463         }
 464
 465         count = 0;
 466         list_for_each_entry(rentry, &resource_list, node) {
 467                 memcpy(&resources[count], rentry->res,
 468                        sizeof(*resources));
 469                 count++;
 470         }
 471         ret = platform_device_add_resources(pdev, resources, count);
 472
 473 out:
 474         acpi_dev_free_resource_list(&resource_list);
 475
 476         return ret;
 477 }
 478 #else
 479 static int kempld_get_acpi_data(struct platform_device *pdev)
 480 {
 481         return -ENODEV;
 482 }
 483 #endif /* CONFIG_ACPI */
 484
 485 static int kempld_probe(struct platform_device *pdev)
 486 {
 487         const struct kempld_platform_data *pdata;
 488         struct device *dev = &pdev->dev;
 489         struct kempld_device_data *pld;
 490         struct resource *ioport;
 491         int ret;
 492
 493         if (kempld_pdev == NULL) {
 494                 /*
 495                  * No kempld_pdev device has been registered in kempld_init,
 496                  * so we seem to be probing an ACPI platform device.
 497                  */
 498                 ret = kempld_get_acpi_data(pdev);
 499                 if (ret)
 500                         return ret;
 501         } else if (kempld_pdev != pdev) {
 502                 /*
 503                  * The platform device we are probing is not the one we
 504                  * registered in kempld_init using the DMI table, so this one
 505                  * comes from ACPI.
 506                  * As we can only probe one - abort here and use the DMI
 507                  * based one instead.
 508                  */
 509                 dev_notice(dev, "platform device exists - not using ACPI\n");
 510                 return -ENODEV;
 511         }
 512         pdata = dev_get_platdata(dev);
 513
 514         pld = devm_kzalloc(dev, sizeof(*pld), GFP_KERNEL);
 515         if (!pld)
 516                 return -ENOMEM;
 517
 518         ioport = platform_get_resource(pdev, IORESOURCE_IO, 0);
 519         if (!ioport)
 520                 return -EINVAL;
 521
 522         pld->io_base = devm_ioport_map(dev, ioport->start,
 523                                         resource_size(ioport));
 524         if (!pld->io_base)
 525                 return -ENOMEM;
 526
 527         pld->io_index = pld->io_base;
 528         pld->io_data = pld->io_base + 1;
 529         pld->pld_clock = pdata->pld_clock;
 530         pld->dev = dev;
 531
 532         mutex_init(&pld->lock);
 533         platform_set_drvdata(pdev, pld);
 534
 535         return kempld_detect_device(pld);
 536 }
 537
 538 static void kempld_remove(struct platform_device *pdev)
 539 {
 540         struct kempld_device_data *pld = platform_get_drvdata(pdev);
 541         const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
 542
 543         sysfs_remove_group(&pld->dev->kobj, &pld_attr_group);
 544
 545         mfd_remove_devices(&pdev->dev);
 546         pdata->release_hardware_mutex(pld);
 547 }
 548
 549 #ifdef CONFIG_ACPI
 550 static const struct acpi_device_id kempld_acpi_table[] = {
 551         { "KEM0000", (kernel_ulong_t)&kempld_platform_data_generic },
 552         { "KEM0001", (kernel_ulong_t)&kempld_platform_data_generic },
 553         {}
 554 };
 555 MODULE_DEVICE_TABLE(acpi, kempld_acpi_table);
 556 #endif
 557
 558 static struct platform_driver kempld_driver = {
 559         .driver         = {
 560                 .name   = "kempld",
 561                 .acpi_match_table = ACPI_PTR(kempld_acpi_table),
 562         },
 563         .probe          = kempld_probe,
 564         .remove_new     = kempld_remove,
 565 };
 566
 567 static const struct dmi_system_id kempld_dmi_table[] __initconst = {
 568         {
 569                 .ident = "BBD6",
 570                 .matches = {
 571                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 572                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bBD"),
 573                 },
 574                 .driver_data = (void *)&kempld_platform_data_generic,
 575                 .callback = kempld_create_platform_device,
 576         }, {
 577                 .ident = "BBL6",
 578                 .matches = {
 579                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 580                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bBL6"),
 581                 },
 582                 .driver_data = (void *)&kempld_platform_data_generic,
 583                 .callback = kempld_create_platform_device,
 584         }, {
 585                 .ident = "BDV7",
 586                 .matches = {
 587                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 588                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bDV7"),
 589                 },
 590                 .driver_data = (void *)&kempld_platform_data_generic,
 591                 .callback = kempld_create_platform_device,
 592         }, {
 593                 .ident = "BHL6",
 594                 .matches = {
 595                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 596                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bHL6"),
 597                 },
 598                 .driver_data = (void *)&kempld_platform_data_generic,
 599                 .callback = kempld_create_platform_device,
 600         }, {
 601                 .ident = "BKL6",
 602                 .matches = {
 603                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 604                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bKL6"),
 605                 },
 606                 .driver_data = (void *)&kempld_platform_data_generic,
 607                 .callback = kempld_create_platform_device,
 608         }, {
 609                 .ident = "BSL6",
 610                 .matches = {
 611                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 612                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bSL6"),
 613                 },
 614                 .driver_data = (void *)&kempld_platform_data_generic,
 615                 .callback = kempld_create_platform_device,
 616         }, {
 617                 .ident = "CAL6",
 618                 .matches = {
 619                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 620                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cAL"),
 621                 },
 622                 .driver_data = (void *)&kempld_platform_data_generic,
 623                 .callback = kempld_create_platform_device,
 624         }, {
 625                 .ident = "CBL6",
 626                 .matches = {
 627                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 628                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cBL6"),
 629                 },
 630                 .driver_data = (void *)&kempld_platform_data_generic,
 631                 .callback = kempld_create_platform_device,
 632         }, {
 633                 .ident = "CBW6",
 634                 .matches = {
 635                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 636                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cBW6"),
 637                 },
 638                 .driver_data = (void *)&kempld_platform_data_generic,
 639                 .callback = kempld_create_platform_device,
 640         }, {
 641                 .ident = "CCR2",
 642                 .matches = {
 643                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 644                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP2"),
 645                 },
 646                 .driver_data = (void *)&kempld_platform_data_generic,
 647                 .callback = kempld_create_platform_device,
 648         }, {
 649                 .ident = "CCR6",
 650                 .matches = {
 651                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 652                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP6"),
 653                 },
 654                 .driver_data = (void *)&kempld_platform_data_generic,
 655                 .callback = kempld_create_platform_device,
 656         }, {
 657                 .ident = "CDV7",
 658                 .matches = {
 659                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 660                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cDV7"),
 661                 },
 662                 .driver_data = (void *)&kempld_platform_data_generic,
 663                 .callback = kempld_create_platform_device,
 664         }, {
 665                 .ident = "CHL6",
 666                 .matches = {
 667                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 668                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cHL6"),
 669                 },
 670                 .driver_data = (void *)&kempld_platform_data_generic,
 671                 .callback = kempld_create_platform_device,
 672         }, {
 673                 .ident = "CHR2",
 674                 .matches = {
 675                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 676                         DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T2"),
 677                 },
 678                 .driver_data = (void *)&kempld_platform_data_generic,
 679                 .callback = kempld_create_platform_device,
 680         }, {
 681                 .ident = "CHR2",
 682                 .matches = {
 683                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 684                         DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T2"),
 685                 },
 686                 .driver_data = (void *)&kempld_platform_data_generic,
 687                 .callback = kempld_create_platform_device,
 688         }, {
 689                 .ident = "CHR2",
 690                 .matches = {
 691                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 692                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC2"),
 693                 },
 694                 .driver_data = (void *)&kempld_platform_data_generic,
 695                 .callback = kempld_create_platform_device,
 696         }, {
 697                 .ident = "CHR6",
 698                 .matches = {
 699                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 700                         DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T6"),
 701                 },
 702                 .driver_data = (void *)&kempld_platform_data_generic,
 703                 .callback = kempld_create_platform_device,
 704         }, {
 705                 .ident = "CHR6",
 706                 .matches = {
 707                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 708                         DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T6"),
 709                 },
 710                 .driver_data = (void *)&kempld_platform_data_generic,
 711                 .callback = kempld_create_platform_device,
 712         }, {
 713                 .ident = "CHR6",
 714                 .matches = {
 715                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 716                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC6"),
 717                 },
 718                 .driver_data = (void *)&kempld_platform_data_generic,
 719                 .callback = kempld_create_platform_device,
 720         }, {
 721                 .ident = "CKL6",
 722                 .matches = {
 723                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 724                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cKL6"),
 725                 },
 726                 .driver_data = (void *)&kempld_platform_data_generic,
 727                 .callback = kempld_create_platform_device,
 728         }, {
 729                 .ident = "CNTG",
 730                 .matches = {
 731                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 732                         DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-PC"),
 733                 },
 734                 .driver_data = (void *)&kempld_platform_data_generic,
 735                 .callback = kempld_create_platform_device,
 736         }, {
 737                 .ident = "CNTG",
 738                 .matches = {
 739                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 740                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bPC2"),
 741                 },
 742                 .driver_data = (void *)&kempld_platform_data_generic,
 743                 .callback = kempld_create_platform_device,
 744         }, {
 745                 .ident = "CNTX",
 746                 .matches = {
 747                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 748                         DMI_MATCH(DMI_BOARD_NAME, "PXT"),
 749                 },
 750                 .driver_data = (void *)&kempld_platform_data_generic,
 751                 .callback = kempld_create_platform_device,
 752         }, {
 753                 .ident = "CSL6",
 754                 .matches = {
 755                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 756                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cSL6"),
 757                 },
 758                 .driver_data = (void *)&kempld_platform_data_generic,
 759                 .callback = kempld_create_platform_device,
 760         }, {
 761                 .ident = "CVV6",
 762                 .matches = {
 763                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 764                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cBT"),
 765                 },
 766                 .driver_data = (void *)&kempld_platform_data_generic,
 767                 .callback = kempld_create_platform_device,
 768         }, {
 769                 .ident = "FRI2",
 770                 .matches = {
 771                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 772                         DMI_MATCH(DMI_BIOS_VERSION, "FRI2"),
 773                 },
 774                 .driver_data = (void *)&kempld_platform_data_generic,
 775                 .callback = kempld_create_platform_device,
 776         }, {
 777                 .ident = "FRI2",
 778                 .matches = {
 779                         DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"),
 780                 },
 781                 .driver_data = (void *)&kempld_platform_data_generic,
 782                 .callback = kempld_create_platform_device,
 783         }, {
 784                 .ident = "A203",
 785                 .matches = {
 786                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 787                         DMI_MATCH(DMI_BOARD_NAME, "KBox A-203"),
 788                 },
 789                 .driver_data = (void *)&kempld_platform_data_generic,
 790                 .callback = kempld_create_platform_device,
 791         }, {
 792                 .ident = "M4A1",
 793                 .matches = {
 794                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 795                         DMI_MATCH(DMI_BOARD_NAME, "COMe-m4AL"),
 796                 },
 797                 .driver_data = (void *)&kempld_platform_data_generic,
 798                 .callback = kempld_create_platform_device,
 799         }, {
 800                 .ident = "MAL1",
 801                 .matches = {
 802                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 803                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mAL10"),
 804                 },
 805                 .driver_data = (void *)&kempld_platform_data_generic,
 806                 .callback = kempld_create_platform_device,
 807         }, {
 808                 .ident = "MAPL",
 809                 .matches = {
 810                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 811                         DMI_MATCH(DMI_BOARD_NAME, "mITX-APL"),
 812                 },
 813                 .driver_data = (void *)&kempld_platform_data_generic,
 814                 .callback = kempld_create_platform_device,
 815         }, {
 816                 .ident = "MBR1",
 817                 .matches = {
 818                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 819                         DMI_MATCH(DMI_BOARD_NAME, "ETX-OH"),
 820                 },
 821                 .driver_data = (void *)&kempld_platform_data_generic,
 822                 .callback = kempld_create_platform_device,
 823         }, {
 824                 .ident = "MVV1",
 825                 .matches = {
 826                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 827                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mBT"),
 828                 },
 829                 .driver_data = (void *)&kempld_platform_data_generic,
 830                 .callback = kempld_create_platform_device,
 831         }, {
 832                 .ident = "NTC1",
 833                 .matches = {
 834                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 835                         DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"),
 836                 },
 837                 .driver_data = (void *)&kempld_platform_data_generic,
 838                 .callback = kempld_create_platform_device,
 839         }, {
 840                 .ident = "NTC1",
 841                 .matches = {
 842                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 843                         DMI_MATCH(DMI_BOARD_NAME, "nETXe-TT"),
 844                 },
 845                 .driver_data = (void *)&kempld_platform_data_generic,
 846                 .callback = kempld_create_platform_device,
 847         }, {
 848                 .ident = "NTC1",
 849                 .matches = {
 850                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 851                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"),
 852                 },
 853                 .driver_data = (void *)&kempld_platform_data_generic,
 854                 .callback = kempld_create_platform_device,
 855         }, {
 856                 .ident = "NUP1",
 857                 .matches = {
 858                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 859                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mCT"),
 860                 },
 861                 .driver_data = (void *)&kempld_platform_data_generic,
 862                 .callback = kempld_create_platform_device,
 863         }, {
 864                 .ident = "PAPL",
 865                 .matches = {
 866                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 867                         DMI_MATCH(DMI_BOARD_NAME, "pITX-APL"),
 868                 },
 869                 .driver_data = (void *)&kempld_platform_data_generic,
 870                 .callback = kempld_create_platform_device,
 871         }, {
 872                 .ident = "SXAL",
 873                 .matches = {
 874                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 875                         DMI_MATCH(DMI_BOARD_NAME, "SMARC-sXAL"),
 876                 },
 877                 .driver_data = (void *)&kempld_platform_data_generic,
 878                 .callback = kempld_create_platform_device,
 879         }, {
 880                 .ident = "SXAL4",
 881                 .matches = {
 882                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 883                         DMI_MATCH(DMI_BOARD_NAME, "SMARC-sXA4"),
 884                 },
 885                 .driver_data = (void *)&kempld_platform_data_generic,
 886                 .callback = kempld_create_platform_device,
 887         }, {
 888                 .ident = "UNP1",
 889                 .matches = {
 890                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 891                         DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-DC"),
 892                 },
 893                 .driver_data = (void *)&kempld_platform_data_generic,
 894                 .callback = kempld_create_platform_device,
 895         }, {
 896                 .ident = "UNP1",
 897                 .matches = {
 898                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 899                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cDC2"),
 900                 },
 901                 .driver_data = (void *)&kempld_platform_data_generic,
 902                 .callback = kempld_create_platform_device,
 903         }, {
 904                 .ident = "UNTG",
 905                 .matches = {
 906                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 907                         DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-PC"),
 908                 },
 909                 .driver_data = (void *)&kempld_platform_data_generic,
 910                 .callback = kempld_create_platform_device,
 911         }, {
 912                 .ident = "UNTG",
 913                 .matches = {
 914                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 915                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cPC2"),
 916                 },
 917                 .driver_data = (void *)&kempld_platform_data_generic,
 918                 .callback = kempld_create_platform_device,
 919         }, {
 920                 .ident = "UUP6",
 921                 .matches = {
 922                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 923                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cCT6"),
 924                 },
 925                 .driver_data = (void *)&kempld_platform_data_generic,
 926                 .callback = kempld_create_platform_device,
 927         }, {
 928                 .ident = "UTH6",
 929                 .matches = {
 930                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 931                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cTH6"),
 932                 },
 933                 .driver_data = (void *)&kempld_platform_data_generic,
 934                 .callback = kempld_create_platform_device,
 935         }, {
 936                 .ident = "Q7AL",
 937                 .matches = {
 938                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 939                         DMI_MATCH(DMI_BOARD_NAME, "Qseven-Q7AL"),
 940                 },
 941                 .driver_data = (void *)&kempld_platform_data_generic,
 942                 .callback = kempld_create_platform_device,
 943         },
 944         {}
 945 };
 946 MODULE_DEVICE_TABLE(dmi, kempld_dmi_table);
 947
 948 static int __init kempld_init(void)
 949 {
 950         const struct dmi_system_id *id;
 951
 952         if (force_device_id[0]) {
 953                 for (id = kempld_dmi_table;
 954                      id->matches[0].slot != DMI_NONE; id++)
 955                         if (strstr(id->ident, force_device_id))
 956                                 if (id->callback && !id->callback(id))
 957                                         break;
 958                 if (id->matches[0].slot == DMI_NONE)
 959                         return -ENODEV;
 960         } else {
 961                 dmi_check_system(kempld_dmi_table);
 962         }
 963
 964         return platform_driver_register(&kempld_driver);
 965 }
 966
 967 static void __exit kempld_exit(void)
 968 {
 969         if (kempld_pdev)
 970                 platform_device_unregister(kempld_pdev);
 971
 972         platform_driver_unregister(&kempld_driver);
 973 }
 974
 975 module_init(kempld_init);
 976 module_exit(kempld_exit);
 977
 978 MODULE_DESCRIPTION("KEM PLD Core Driver");
 979 MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>");
 980 MODULE_LICENSE("GPL");
 981 MODULE_ALIAS("platform:kempld-core");