LXR linux/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
  26static char force_device_id[MAX_ID_LEN + 1] = "";
  27module_param_string(force_device_id, force_device_id,
  28                    sizeof(force_device_id), 0);
  29MODULE_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 */
  36static 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
  43static 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
  49static 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
  83enum kempld_cells {
  84        KEMPLD_I2C = 0,
  85        KEMPLD_WDT,
  86        KEMPLD_GPIO,
  87        KEMPLD_UART,
  88};
  89
  90static 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
 107static 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
 127static struct resource kempld_ioresource = {
 128        .start  = KEMPLD_IOINDEX,
 129        .end    = KEMPLD_IODATA,
 130        .flags  = IORESOURCE_IO,
 131};
 132
 133static 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
 142static struct platform_device *kempld_pdev;
 143
 144static 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;
 166err:
 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 */
 178u8 kempld_read8(struct kempld_device_data *pld, u8 index)
 179{
 180        iowrite8(index, pld->io_index);
 181        return ioread8(pld->io_data);
 182}
 183EXPORT_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 */
 193void 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}
 198EXPORT_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 */
 207u16 kempld_read16(struct kempld_device_data *pld, u8 index)
 208{
 209        return kempld_read8(pld, index) | kempld_read8(pld, index + 1) << 8;
 210}
 211EXPORT_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 */
 221void 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}
 226EXPORT_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 */
 235u32 kempld_read32(struct kempld_device_data *pld, u8 index)
 236{
 237        return kempld_read16(pld, index) | kempld_read16(pld, index + 2) << 16;
 238}
 239EXPORT_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 */
 249void 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}
 254EXPORT_SYMBOL_GPL(kempld_write32);
 255
 256/**
 257 * kempld_get_mutex - acquire PLD mutex
 258 * @pld: kempld_device_data structure describing the PLD
 259 */
 260void 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}
 267EXPORT_SYMBOL_GPL(kempld_get_mutex);
 268
 269/**
 270 * kempld_release_mutex - release PLD mutex
 271 * @pld: kempld_device_data structure describing the PLD
 272 */
 273void 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}
 280EXPORT_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 */
 290static 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 */
 333static 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
 340static 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
 362static 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
 370static 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
 379static 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
 387static DEVICE_ATTR(pld_version, S_IRUGO, kempld_version_show, NULL);
 388static DEVICE_ATTR(pld_specification, S_IRUGO, kempld_specification_show,
 389                   NULL);
 390static DEVICE_ATTR(pld_type, S_IRUGO, kempld_type_show, NULL);
 391
 392static 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
 399static const struct attribute_group pld_attr_group = {
 400        .attrs = pld_attributes,
 401};
 402
 403static 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
 445static 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
 481static 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
 494static struct platform_driver kempld_driver = {
 495        .driver         = {
 496                .name   = "kempld",
 497        },
 498        .probe          = kempld_probe,
 499        .remove         = kempld_remove,
 500};
 501
 502static 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        {
 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};
 731MODULE_DEVICE_TABLE(dmi, kempld_dmi_table);
 732
 733static 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;
 740                     id->matches[0].slot != DMI_NONE; id++)
 741                        if (strstr(id->ident, force_device_id))
 742                                if (id->callback && !id->callback(id))
 743                                        break;
 744                if (id->matches[0].slot == DMI_NONE)
 745                        return -ENODEV;
 746        } else {
 747                if (!dmi_check_system(kempld_dmi_table))
 748                        return -ENODEV;
 749        }
 750
 751        ret = platform_driver_register(&kempld_driver);
 752        if (ret)
 753                return ret;
 754
 755        return 0;
 756}
 757
 758static void __exit kempld_exit(void)
 759{
 760        if (kempld_pdev)
 761                platform_device_unregister(kempld_pdev);
 762
 763        platform_driver_unregister(&kempld_driver);
 764}
 765
 766module_init(kempld_init);
 767module_exit(kempld_exit);
 768
 769MODULE_DESCRIPTION("KEM PLD Core Driver");
 770MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>");
 771MODULE_LICENSE("GPL");
 772MODULE_ALIAS("platform:kempld-core");
 773