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