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 .owner = THIS_MODULE, 498 }, 499 .probe = kempld_probe, 500 .remove = kempld_remove, 501 }; 502 503 static struct dmi_system_id kempld_dmi_table[] __initdata = { 504 { 505 .ident = "BHL6", 506 .matches = { 507 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 508 DMI_MATCH(DMI_BOARD_NAME, "COMe-bHL6"), 509 }, 510 .driver_data = (void *)&kempld_platform_data_generic, 511 .callback = kempld_create_platform_device, 512 }, 513 { 514 .ident = "CCR2", 515 .matches = { 516 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 517 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP2"), 518 }, 519 .driver_data = (void *)&kempld_platform_data_generic, 520 .callback = kempld_create_platform_device, 521 }, { 522 .ident = "CCR6", 523 .matches = { 524 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 525 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP6"), 526 }, 527 .driver_data = (void *)&kempld_platform_data_generic, 528 .callback = kempld_create_platform_device, 529 }, { 530 .ident = "CHL6", 531 .matches = { 532 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 533 DMI_MATCH(DMI_BOARD_NAME, "COMe-cHL6"), 534 }, 535 .driver_data = (void *)&kempld_platform_data_generic, 536 .callback = kempld_create_platform_device, 537 }, { 538 .ident = "CHR2", 539 .matches = { 540 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 541 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T2"), 542 }, 543 .driver_data = (void *)&kempld_platform_data_generic, 544 .callback = kempld_create_platform_device, 545 }, { 546 .ident = "CHR2", 547 .matches = { 548 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 549 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T2"), 550 }, 551 .driver_data = (void *)&kempld_platform_data_generic, 552 .callback = kempld_create_platform_device, 553 }, { 554 .ident = "CHR2", 555 .matches = { 556 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 557 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC2"), 558 }, 559 .driver_data = (void *)&kempld_platform_data_generic, 560 .callback = kempld_create_platform_device, 561 }, { 562 .ident = "CHR6", 563 .matches = { 564 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 565 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T6"), 566 }, 567 .driver_data = (void *)&kempld_platform_data_generic, 568 .callback = kempld_create_platform_device, 569 }, { 570 .ident = "CHR6", 571 .matches = { 572 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 573 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T6"), 574 }, 575 .driver_data = (void *)&kempld_platform_data_generic, 576 .callback = kempld_create_platform_device, 577 }, { 578 .ident = "CHR6", 579 .matches = { 580 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 581 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC6"), 582 }, 583 .driver_data = (void *)&kempld_platform_data_generic, 584 .callback = kempld_create_platform_device, 585 }, { 586 .ident = "CNTG", 587 .matches = { 588 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 589 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-PC"), 590 }, 591 .driver_data = (void *)&kempld_platform_data_generic, 592 .callback = kempld_create_platform_device, 593 }, { 594 .ident = "CNTG", 595 .matches = { 596 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 597 DMI_MATCH(DMI_BOARD_NAME, "COMe-bPC2"), 598 }, 599 .driver_data = (void *)&kempld_platform_data_generic, 600 .callback = kempld_create_platform_device, 601 }, { 602 .ident = "CNTX", 603 .matches = { 604 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 605 DMI_MATCH(DMI_BOARD_NAME, "PXT"), 606 }, 607 .driver_data = (void *)&kempld_platform_data_generic, 608 .callback = kempld_create_platform_device, 609 }, { 610 .ident = "CVV6", 611 .matches = { 612 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 613 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBT"), 614 }, 615 .driver_data = (void *)&kempld_platform_data_generic, 616 .callback = kempld_create_platform_device, 617 }, { 618 .ident = "FRI2", 619 .matches = { 620 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 621 DMI_MATCH(DMI_BIOS_VERSION, "FRI2"), 622 }, 623 .driver_data = (void *)&kempld_platform_data_generic, 624 .callback = kempld_create_platform_device, 625 }, { 626 .ident = "FRI2", 627 .matches = { 628 DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"), 629 }, 630 .driver_data = (void *)&kempld_platform_data_generic, 631 .callback = kempld_create_platform_device, 632 }, { 633 .ident = "MBR1", 634 .matches = { 635 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 636 DMI_MATCH(DMI_BOARD_NAME, "ETX-OH"), 637 }, 638 .driver_data = (void *)&kempld_platform_data_generic, 639 .callback = kempld_create_platform_device, 640 }, { 641 .ident = "MVV1", 642 .matches = { 643 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 644 DMI_MATCH(DMI_BOARD_NAME, "COMe-mBT"), 645 }, 646 .driver_data = (void *)&kempld_platform_data_generic, 647 .callback = kempld_create_platform_device, 648 }, { 649 .ident = "NTC1", 650 .matches = { 651 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 652 DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"), 653 }, 654 .driver_data = (void *)&kempld_platform_data_generic, 655 .callback = kempld_create_platform_device, 656 }, { 657 .ident = "NTC1", 658 .matches = { 659 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 660 DMI_MATCH(DMI_BOARD_NAME, "nETXe-TT"), 661 }, 662 .driver_data = (void *)&kempld_platform_data_generic, 663 .callback = kempld_create_platform_device, 664 }, { 665 .ident = "NTC1", 666 .matches = { 667 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 668 DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"), 669 }, 670 .driver_data = (void *)&kempld_platform_data_generic, 671 .callback = kempld_create_platform_device, 672 }, { 673 .ident = "NUP1", 674 .matches = { 675 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 676 DMI_MATCH(DMI_BOARD_NAME, "COMe-mCT"), 677 }, 678 .driver_data = (void *)&kempld_platform_data_generic, 679 .callback = kempld_create_platform_device, 680 }, { 681 .ident = "UNP1", 682 .matches = { 683 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 684 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-DC"), 685 }, 686 .driver_data = (void *)&kempld_platform_data_generic, 687 .callback = kempld_create_platform_device, 688 }, { 689 .ident = "UNP1", 690 .matches = { 691 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 692 DMI_MATCH(DMI_BOARD_NAME, "COMe-cDC2"), 693 }, 694 .driver_data = (void *)&kempld_platform_data_generic, 695 .callback = kempld_create_platform_device, 696 }, { 697 .ident = "UNTG", 698 .matches = { 699 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 700 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-PC"), 701 }, 702 .driver_data = (void *)&kempld_platform_data_generic, 703 .callback = kempld_create_platform_device, 704 }, { 705 .ident = "UNTG", 706 .matches = { 707 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 708 DMI_MATCH(DMI_BOARD_NAME, "COMe-cPC2"), 709 }, 710 .driver_data = (void *)&kempld_platform_data_generic, 711 .callback = kempld_create_platform_device, 712 }, { 713 .ident = "UUP6", 714 .matches = { 715 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 716 DMI_MATCH(DMI_BOARD_NAME, "COMe-cCT6"), 717 }, 718 .driver_data = (void *)&kempld_platform_data_generic, 719 .callback = kempld_create_platform_device, 720 }, 721 { 722 .ident = "UTH6", 723 .matches = { 724 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 725 DMI_MATCH(DMI_BOARD_NAME, "COMe-cTH6"), 726 }, 727 .driver_data = (void *)&kempld_platform_data_generic, 728 .callback = kempld_create_platform_device, 729 }, 730 {} 731 }; 732 MODULE_DEVICE_TABLE(dmi, kempld_dmi_table); 733 734 static int __init kempld_init(void) 735 { 736 const struct dmi_system_id *id; 737 int ret; 738 739 if (force_device_id[0]) { 740 for (id = kempld_dmi_table; 741 id->matches[0].slot != DMI_NONE; id++) 742 if (strstr(id->ident, force_device_id)) 743 if (id->callback && id->callback(id)) 744 break; 745 if (id->matches[0].slot == DMI_NONE) 746 return -ENODEV; 747 } else { 748 if (!dmi_check_system(kempld_dmi_table)) 749 return -ENODEV; 750 } 751 752 ret = platform_driver_register(&kempld_driver); 753 if (ret) 754 return ret; 755 756 return 0; 757 } 758 759 static void __exit kempld_exit(void) 760 { 761 if (kempld_pdev) 762 platform_device_unregister(kempld_pdev); 763 764 platform_driver_unregister(&kempld_driver); 765 } 766 767 module_init(kempld_init); 768 module_exit(kempld_exit); 769 770 MODULE_DESCRIPTION("KEM PLD Core Driver"); 771 MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>"); 772 MODULE_LICENSE("GPL"); 773 MODULE_ALIAS("platform:kempld-core"); 774