drivers/mfd/kempld-core.c

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