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