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 int 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         return 0;
 549 }
 550
 551 #ifdef CONFIG_ACPI
 552 static const struct acpi_device_id kempld_acpi_table[] = {
 553         { "KEM0000", (kernel_ulong_t)&kempld_platform_data_generic },
 554         { "KEM0001", (kernel_ulong_t)&kempld_platform_data_generic },
 555         {}
 556 };
 557 MODULE_DEVICE_TABLE(acpi, kempld_acpi_table);
 558 #endif
 559
 560 static struct platform_driver kempld_driver = {
 561         .driver         = {
 562                 .name   = "kempld",
 563                 .acpi_match_table = ACPI_PTR(kempld_acpi_table),
 564         },
 565         .probe          = kempld_probe,
 566         .remove         = kempld_remove,
 567 };
 568
 569 static const struct dmi_system_id kempld_dmi_table[] __initconst = {
 570         {
 571                 .ident = "BBD6",
 572                 .matches = {
 573                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 574                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bBD"),
 575                 },
 576                 .driver_data = (void *)&kempld_platform_data_generic,
 577                 .callback = kempld_create_platform_device,
 578         }, {
 579                 .ident = "BBL6",
 580                 .matches = {
 581                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 582                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bBL6"),
 583                 },
 584                 .driver_data = (void *)&kempld_platform_data_generic,
 585                 .callback = kempld_create_platform_device,
 586         }, {
 587                 .ident = "BDV7",
 588                 .matches = {
 589                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 590                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bDV7"),
 591                 },
 592                 .driver_data = (void *)&kempld_platform_data_generic,
 593                 .callback = kempld_create_platform_device,
 594         }, {
 595                 .ident = "BHL6",
 596                 .matches = {
 597                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 598                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bHL6"),
 599                 },
 600                 .driver_data = (void *)&kempld_platform_data_generic,
 601                 .callback = kempld_create_platform_device,
 602         }, {
 603                 .ident = "BKL6",
 604                 .matches = {
 605                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 606                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bKL6"),
 607                 },
 608                 .driver_data = (void *)&kempld_platform_data_generic,
 609                 .callback = kempld_create_platform_device,
 610         }, {
 611                 .ident = "BSL6",
 612                 .matches = {
 613                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 614                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bSL6"),
 615                 },
 616                 .driver_data = (void *)&kempld_platform_data_generic,
 617                 .callback = kempld_create_platform_device,
 618         }, {
 619                 .ident = "CAL6",
 620                 .matches = {
 621                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 622                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cAL"),
 623                 },
 624                 .driver_data = (void *)&kempld_platform_data_generic,
 625                 .callback = kempld_create_platform_device,
 626         }, {
 627                 .ident = "CBL6",
 628                 .matches = {
 629                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 630                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cBL6"),
 631                 },
 632                 .driver_data = (void *)&kempld_platform_data_generic,
 633                 .callback = kempld_create_platform_device,
 634         }, {
 635                 .ident = "CBW6",
 636                 .matches = {
 637                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 638                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cBW6"),
 639                 },
 640                 .driver_data = (void *)&kempld_platform_data_generic,
 641                 .callback = kempld_create_platform_device,
 642         }, {
 643                 .ident = "CCR2",
 644                 .matches = {
 645                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 646                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP2"),
 647                 },
 648                 .driver_data = (void *)&kempld_platform_data_generic,
 649                 .callback = kempld_create_platform_device,
 650         }, {
 651                 .ident = "CCR6",
 652                 .matches = {
 653                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 654                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP6"),
 655                 },
 656                 .driver_data = (void *)&kempld_platform_data_generic,
 657                 .callback = kempld_create_platform_device,
 658         }, {
 659                 .ident = "CDV7",
 660                 .matches = {
 661                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 662                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cDV7"),
 663                 },
 664                 .driver_data = (void *)&kempld_platform_data_generic,
 665                 .callback = kempld_create_platform_device,
 666         }, {
 667                 .ident = "CHL6",
 668                 .matches = {
 669                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 670                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cHL6"),
 671                 },
 672                 .driver_data = (void *)&kempld_platform_data_generic,
 673                 .callback = kempld_create_platform_device,
 674         }, {
 675                 .ident = "CHR2",
 676                 .matches = {
 677                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 678                         DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T2"),
 679                 },
 680                 .driver_data = (void *)&kempld_platform_data_generic,
 681                 .callback = kempld_create_platform_device,
 682         }, {
 683                 .ident = "CHR2",
 684                 .matches = {
 685                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 686                         DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T2"),
 687                 },
 688                 .driver_data = (void *)&kempld_platform_data_generic,
 689                 .callback = kempld_create_platform_device,
 690         }, {
 691                 .ident = "CHR2",
 692                 .matches = {
 693                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 694                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC2"),
 695                 },
 696                 .driver_data = (void *)&kempld_platform_data_generic,
 697                 .callback = kempld_create_platform_device,
 698         }, {
 699                 .ident = "CHR6",
 700                 .matches = {
 701                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 702                         DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T6"),
 703                 },
 704                 .driver_data = (void *)&kempld_platform_data_generic,
 705                 .callback = kempld_create_platform_device,
 706         }, {
 707                 .ident = "CHR6",
 708                 .matches = {
 709                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 710                         DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T6"),
 711                 },
 712                 .driver_data = (void *)&kempld_platform_data_generic,
 713                 .callback = kempld_create_platform_device,
 714         }, {
 715                 .ident = "CHR6",
 716                 .matches = {
 717                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 718                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC6"),
 719                 },
 720                 .driver_data = (void *)&kempld_platform_data_generic,
 721                 .callback = kempld_create_platform_device,
 722         }, {
 723                 .ident = "CKL6",
 724                 .matches = {
 725                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 726                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cKL6"),
 727                 },
 728                 .driver_data = (void *)&kempld_platform_data_generic,
 729                 .callback = kempld_create_platform_device,
 730         }, {
 731                 .ident = "CNTG",
 732                 .matches = {
 733                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 734                         DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-PC"),
 735                 },
 736                 .driver_data = (void *)&kempld_platform_data_generic,
 737                 .callback = kempld_create_platform_device,
 738         }, {
 739                 .ident = "CNTG",
 740                 .matches = {
 741                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 742                         DMI_MATCH(DMI_BOARD_NAME, "COMe-bPC2"),
 743                 },
 744                 .driver_data = (void *)&kempld_platform_data_generic,
 745                 .callback = kempld_create_platform_device,
 746         }, {
 747                 .ident = "CNTX",
 748                 .matches = {
 749                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 750                         DMI_MATCH(DMI_BOARD_NAME, "PXT"),
 751                 },
 752                 .driver_data = (void *)&kempld_platform_data_generic,
 753                 .callback = kempld_create_platform_device,
 754         }, {
 755                 .ident = "CSL6",
 756                 .matches = {
 757                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 758                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cSL6"),
 759                 },
 760                 .driver_data = (void *)&kempld_platform_data_generic,
 761                 .callback = kempld_create_platform_device,
 762         }, {
 763                 .ident = "CVV6",
 764                 .matches = {
 765                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 766                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cBT"),
 767                 },
 768                 .driver_data = (void *)&kempld_platform_data_generic,
 769                 .callback = kempld_create_platform_device,
 770         }, {
 771                 .ident = "FRI2",
 772                 .matches = {
 773                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 774                         DMI_MATCH(DMI_BIOS_VERSION, "FRI2"),
 775                 },
 776                 .driver_data = (void *)&kempld_platform_data_generic,
 777                 .callback = kempld_create_platform_device,
 778         }, {
 779                 .ident = "FRI2",
 780                 .matches = {
 781                         DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"),
 782                 },
 783                 .driver_data = (void *)&kempld_platform_data_generic,
 784                 .callback = kempld_create_platform_device,
 785         }, {
 786                 .ident = "A203",
 787                 .matches = {
 788                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 789                         DMI_MATCH(DMI_BOARD_NAME, "KBox A-203"),
 790                 },
 791                 .driver_data = (void *)&kempld_platform_data_generic,
 792                 .callback = kempld_create_platform_device,
 793         }, {
 794                 .ident = "M4A1",
 795                 .matches = {
 796                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 797                         DMI_MATCH(DMI_BOARD_NAME, "COMe-m4AL"),
 798                 },
 799                 .driver_data = (void *)&kempld_platform_data_generic,
 800                 .callback = kempld_create_platform_device,
 801         }, {
 802                 .ident = "MAL1",
 803                 .matches = {
 804                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 805                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mAL10"),
 806                 },
 807                 .driver_data = (void *)&kempld_platform_data_generic,
 808                 .callback = kempld_create_platform_device,
 809         }, {
 810                 .ident = "MAPL",
 811                 .matches = {
 812                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 813                         DMI_MATCH(DMI_BOARD_NAME, "mITX-APL"),
 814                 },
 815                 .driver_data = (void *)&kempld_platform_data_generic,
 816                 .callback = kempld_create_platform_device,
 817         }, {
 818                 .ident = "MBR1",
 819                 .matches = {
 820                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 821                         DMI_MATCH(DMI_BOARD_NAME, "ETX-OH"),
 822                 },
 823                 .driver_data = (void *)&kempld_platform_data_generic,
 824                 .callback = kempld_create_platform_device,
 825         }, {
 826                 .ident = "MVV1",
 827                 .matches = {
 828                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 829                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mBT"),
 830                 },
 831                 .driver_data = (void *)&kempld_platform_data_generic,
 832                 .callback = kempld_create_platform_device,
 833         }, {
 834                 .ident = "NTC1",
 835                 .matches = {
 836                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 837                         DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"),
 838                 },
 839                 .driver_data = (void *)&kempld_platform_data_generic,
 840                 .callback = kempld_create_platform_device,
 841         }, {
 842                 .ident = "NTC1",
 843                 .matches = {
 844                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 845                         DMI_MATCH(DMI_BOARD_NAME, "nETXe-TT"),
 846                 },
 847                 .driver_data = (void *)&kempld_platform_data_generic,
 848                 .callback = kempld_create_platform_device,
 849         }, {
 850                 .ident = "NTC1",
 851                 .matches = {
 852                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 853                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"),
 854                 },
 855                 .driver_data = (void *)&kempld_platform_data_generic,
 856                 .callback = kempld_create_platform_device,
 857         }, {
 858                 .ident = "NUP1",
 859                 .matches = {
 860                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 861                         DMI_MATCH(DMI_BOARD_NAME, "COMe-mCT"),
 862                 },
 863                 .driver_data = (void *)&kempld_platform_data_generic,
 864                 .callback = kempld_create_platform_device,
 865         }, {
 866                 .ident = "PAPL",
 867                 .matches = {
 868                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 869                         DMI_MATCH(DMI_BOARD_NAME, "pITX-APL"),
 870                 },
 871                 .driver_data = (void *)&kempld_platform_data_generic,
 872                 .callback = kempld_create_platform_device,
 873         }, {
 874                 .ident = "SXAL",
 875                 .matches = {
 876                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 877                         DMI_MATCH(DMI_BOARD_NAME, "SMARC-sXAL"),
 878                 },
 879                 .driver_data = (void *)&kempld_platform_data_generic,
 880                 .callback = kempld_create_platform_device,
 881         }, {
 882                 .ident = "SXAL4",
 883                 .matches = {
 884                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 885                         DMI_MATCH(DMI_BOARD_NAME, "SMARC-sXA4"),
 886                 },
 887                 .driver_data = (void *)&kempld_platform_data_generic,
 888                 .callback = kempld_create_platform_device,
 889         }, {
 890                 .ident = "UNP1",
 891                 .matches = {
 892                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 893                         DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-DC"),
 894                 },
 895                 .driver_data = (void *)&kempld_platform_data_generic,
 896                 .callback = kempld_create_platform_device,
 897         }, {
 898                 .ident = "UNP1",
 899                 .matches = {
 900                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 901                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cDC2"),
 902                 },
 903                 .driver_data = (void *)&kempld_platform_data_generic,
 904                 .callback = kempld_create_platform_device,
 905         }, {
 906                 .ident = "UNTG",
 907                 .matches = {
 908                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 909                         DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-PC"),
 910                 },
 911                 .driver_data = (void *)&kempld_platform_data_generic,
 912                 .callback = kempld_create_platform_device,
 913         }, {
 914                 .ident = "UNTG",
 915                 .matches = {
 916                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 917                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cPC2"),
 918                 },
 919                 .driver_data = (void *)&kempld_platform_data_generic,
 920                 .callback = kempld_create_platform_device,
 921         }, {
 922                 .ident = "UUP6",
 923                 .matches = {
 924                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 925                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cCT6"),
 926                 },
 927                 .driver_data = (void *)&kempld_platform_data_generic,
 928                 .callback = kempld_create_platform_device,
 929         }, {
 930                 .ident = "UTH6",
 931                 .matches = {
 932                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 933                         DMI_MATCH(DMI_BOARD_NAME, "COMe-cTH6"),
 934                 },
 935                 .driver_data = (void *)&kempld_platform_data_generic,
 936                 .callback = kempld_create_platform_device,
 937         }, {
 938                 .ident = "Q7AL",
 939                 .matches = {
 940                         DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
 941                         DMI_MATCH(DMI_BOARD_NAME, "Qseven-Q7AL"),
 942                 },
 943                 .driver_data = (void *)&kempld_platform_data_generic,
 944                 .callback = kempld_create_platform_device,
 945         },
 946         {}
 947 };
 948 MODULE_DEVICE_TABLE(dmi, kempld_dmi_table);
 949
 950 static int __init kempld_init(void)
 951 {
 952         const struct dmi_system_id *id;
 953
 954         if (force_device_id[0]) {
 955                 for (id = kempld_dmi_table;
 956                      id->matches[0].slot != DMI_NONE; id++)
 957                         if (strstr(id->ident, force_device_id))
 958                                 if (id->callback && !id->callback(id))
 959                                         break;
 960                 if (id->matches[0].slot == DMI_NONE)
 961                         return -ENODEV;
 962         } else {
 963                 dmi_check_system(kempld_dmi_table);
 964         }
 965
 966         return platform_driver_register(&kempld_driver);
 967 }
 968
 969 static void __exit kempld_exit(void)
 970 {
 971         if (kempld_pdev)
 972                 platform_device_unregister(kempld_pdev);
 973
 974         platform_driver_unregister(&kempld_driver);
 975 }
 976
 977 module_init(kempld_init);
 978 module_exit(kempld_exit);
 979
 980 MODULE_DESCRIPTION("KEM PLD Core Driver");
 981 MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>");
 982 MODULE_LICENSE("GPL");
 983 MODULE_ALIAS("platform:kempld-core");