1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Kontron PLD MFD core driver 4 * 5 * Copyright (c) 2010-2013 Kontron Europe GmbH 6 * Author: Michael Brunner <michael.brunner@kontron.com> 7 */ 8 9 #include <linux/err.h> 10 #include <linux/platform_device.h> 11 #include <linux/mfd/core.h> 12 #include <linux/mfd/kempld.h> 13 #include <linux/mod_devicetable.h> 14 #include <linux/module.h> 15 #include <linux/property.h> 16 #include <linux/dmi.h> 17 #include <linux/io.h> 18 #include <linux/delay.h> 19 #include <linux/sysfs.h> 20 21 #define MAX_ID_LEN 4 22 static char force_device_id[MAX_ID_LEN + 1] = ""; 23 module_param_string(force_device_id, force_device_id, 24 sizeof(force_device_id), 0); 25 MODULE_PARM_DESC(force_device_id, "Override detected product"); 26 27 /* 28 * Get hardware mutex to block firmware from accessing the pld. 29 * It is possible for the firmware may hold the mutex for an extended length of 30 * time. This function will block until access has been granted. 31 */ 32 static void kempld_get_hardware_mutex(struct kempld_device_data *pld) 33 { 34 /* The mutex bit will read 1 until access has been granted */ 35 while (ioread8(pld->io_index) & KEMPLD_MUTEX_KEY) 36 usleep_range(1000, 3000); 37 } 38 39 static void kempld_release_hardware_mutex(struct kempld_device_data *pld) 40 { 41 /* The harware mutex is released when 1 is written to the mutex bit. */ 42 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index); 43 } 44 45 static int kempld_get_info_generic(struct kempld_device_data *pld) 46 { 47 u16 version; 48 u8 spec; 49 50 kempld_get_mutex(pld); 51 52 version = kempld_read16(pld, KEMPLD_VERSION); 53 spec = kempld_read8(pld, KEMPLD_SPEC); 54 pld->info.buildnr = kempld_read16(pld, KEMPLD_BUILDNR); 55 56 pld->info.minor = KEMPLD_VERSION_GET_MINOR(version); 57 pld->info.major = KEMPLD_VERSION_GET_MAJOR(version); 58 pld->info.number = KEMPLD_VERSION_GET_NUMBER(version); 59 pld->info.type = KEMPLD_VERSION_GET_TYPE(version); 60 61 if (spec == 0xff) { 62 pld->info.spec_minor = 0; 63 pld->info.spec_major = 1; 64 } else { 65 pld->info.spec_minor = KEMPLD_SPEC_GET_MINOR(spec); 66 pld->info.spec_major = KEMPLD_SPEC_GET_MAJOR(spec); 67 } 68 69 if (pld->info.spec_major > 0) 70 pld->feature_mask = kempld_read16(pld, KEMPLD_FEATURE); 71 else 72 pld->feature_mask = 0; 73 74 kempld_release_mutex(pld); 75 76 return 0; 77 } 78 79 enum kempld_cells { 80 KEMPLD_I2C = 0, 81 KEMPLD_WDT, 82 KEMPLD_GPIO, 83 KEMPLD_UART, 84 }; 85 86 static const char *kempld_dev_names[] = { 87 [KEMPLD_I2C] = "kempld-i2c", 88 [KEMPLD_WDT] = "kempld-wdt", 89 [KEMPLD_GPIO] = "kempld-gpio", 90 [KEMPLD_UART] = "kempld-uart", 91 }; 92 93 #define KEMPLD_MAX_DEVS ARRAY_SIZE(kempld_dev_names) 94 95 static int kempld_register_cells_generic(struct kempld_device_data *pld) 96 { 97 struct mfd_cell devs[KEMPLD_MAX_DEVS] = {}; 98 int i = 0; 99 100 if (pld->feature_mask & KEMPLD_FEATURE_BIT_I2C) 101 devs[i++].name = kempld_dev_names[KEMPLD_I2C]; 102 103 if (pld->feature_mask & KEMPLD_FEATURE_BIT_WATCHDOG) 104 devs[i++].name = kempld_dev_names[KEMPLD_WDT]; 105 106 if (pld->feature_mask & KEMPLD_FEATURE_BIT_GPIO) 107 devs[i++].name = kempld_dev_names[KEMPLD_GPIO]; 108 109 if (pld->feature_mask & KEMPLD_FEATURE_MASK_UART) 110 devs[i++].name = kempld_dev_names[KEMPLD_UART]; 111 112 return mfd_add_devices(pld->dev, PLATFORM_DEVID_NONE, devs, i, NULL, 0, NULL); 113 } 114 115 static struct resource kempld_ioresource = { 116 .start = KEMPLD_IOINDEX, 117 .end = KEMPLD_IODATA, 118 .flags = IORESOURCE_IO, 119 }; 120 121 static const struct kempld_platform_data kempld_platform_data_generic = { 122 .pld_clock = KEMPLD_CLK, 123 .ioresource = &kempld_ioresource, 124 .get_hardware_mutex = kempld_get_hardware_mutex, 125 .release_hardware_mutex = kempld_release_hardware_mutex, 126 .get_info = kempld_get_info_generic, 127 .register_cells = kempld_register_cells_generic, 128 }; 129 130 static struct platform_device *kempld_pdev; 131 132 static int kempld_create_platform_device(const struct kempld_platform_data *pdata) 133 { 134 const struct platform_device_info pdevinfo = { 135 .name = "kempld", 136 .id = PLATFORM_DEVID_NONE, 137 .res = pdata->ioresource, 138 .num_res = 1, 139 .data = pdata, 140 .size_data = sizeof(*pdata), 141 }; 142 143 kempld_pdev = platform_device_register_full(&pdevinfo); 144 145 return PTR_ERR_OR_ZERO(kempld_pdev); 146 } 147 148 /** 149 * kempld_read8 - read 8 bit register 150 * @pld: kempld_device_data structure describing the PLD 151 * @index: register index on the chip 152 * 153 * kempld_get_mutex must be called prior to calling this function. 154 */ 155 u8 kempld_read8(struct kempld_device_data *pld, u8 index) 156 { 157 iowrite8(index, pld->io_index); 158 return ioread8(pld->io_data); 159 } 160 EXPORT_SYMBOL_GPL(kempld_read8); 161 162 /** 163 * kempld_write8 - write 8 bit register 164 * @pld: kempld_device_data structure describing the PLD 165 * @index: register index on the chip 166 * @data: new register value 167 * 168 * kempld_get_mutex must be called prior to calling this function. 169 */ 170 void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data) 171 { 172 iowrite8(index, pld->io_index); 173 iowrite8(data, pld->io_data); 174 } 175 EXPORT_SYMBOL_GPL(kempld_write8); 176 177 /** 178 * kempld_read16 - read 16 bit register 179 * @pld: kempld_device_data structure describing the PLD 180 * @index: register index on the chip 181 * 182 * kempld_get_mutex must be called prior to calling this function. 183 */ 184 u16 kempld_read16(struct kempld_device_data *pld, u8 index) 185 { 186 return kempld_read8(pld, index) | kempld_read8(pld, index + 1) << 8; 187 } 188 EXPORT_SYMBOL_GPL(kempld_read16); 189 190 /** 191 * kempld_write16 - write 16 bit register 192 * @pld: kempld_device_data structure describing the PLD 193 * @index: register index on the chip 194 * @data: new register value 195 * 196 * kempld_get_mutex must be called prior to calling this function. 197 */ 198 void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data) 199 { 200 kempld_write8(pld, index, (u8)data); 201 kempld_write8(pld, index + 1, (u8)(data >> 8)); 202 } 203 EXPORT_SYMBOL_GPL(kempld_write16); 204 205 /** 206 * kempld_read32 - read 32 bit register 207 * @pld: kempld_device_data structure describing the PLD 208 * @index: register index on the chip 209 * 210 * kempld_get_mutex must be called prior to calling this function. 211 */ 212 u32 kempld_read32(struct kempld_device_data *pld, u8 index) 213 { 214 return kempld_read16(pld, index) | kempld_read16(pld, index + 2) << 16; 215 } 216 EXPORT_SYMBOL_GPL(kempld_read32); 217 218 /** 219 * kempld_write32 - write 32 bit register 220 * @pld: kempld_device_data structure describing the PLD 221 * @index: register index on the chip 222 * @data: new register value 223 * 224 * kempld_get_mutex must be called prior to calling this function. 225 */ 226 void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data) 227 { 228 kempld_write16(pld, index, (u16)data); 229 kempld_write16(pld, index + 2, (u16)(data >> 16)); 230 } 231 EXPORT_SYMBOL_GPL(kempld_write32); 232 233 /** 234 * kempld_get_mutex - acquire PLD mutex 235 * @pld: kempld_device_data structure describing the PLD 236 */ 237 void kempld_get_mutex(struct kempld_device_data *pld) 238 { 239 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev); 240 241 mutex_lock(&pld->lock); 242 pdata->get_hardware_mutex(pld); 243 } 244 EXPORT_SYMBOL_GPL(kempld_get_mutex); 245 246 /** 247 * kempld_release_mutex - release PLD mutex 248 * @pld: kempld_device_data structure describing the PLD 249 */ 250 void kempld_release_mutex(struct kempld_device_data *pld) 251 { 252 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev); 253 254 pdata->release_hardware_mutex(pld); 255 mutex_unlock(&pld->lock); 256 } 257 EXPORT_SYMBOL_GPL(kempld_release_mutex); 258 259 /** 260 * kempld_get_info - update device specific information 261 * @pld: kempld_device_data structure describing the PLD 262 * 263 * This function calls the configured board specific kempld_get_info_XXXX 264 * function which is responsible for gathering information about the specific 265 * hardware. The information is then stored within the pld structure. 266 */ 267 static int kempld_get_info(struct kempld_device_data *pld) 268 { 269 int ret; 270 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev); 271 char major, minor; 272 273 ret = pdata->get_info(pld); 274 if (ret) 275 return ret; 276 277 /* The Kontron PLD firmware version string has the following format: 278 * Pwxy.zzzz 279 * P: Fixed 280 * w: PLD number - 1 hex digit 281 * x: Major version - 1 alphanumerical digit (0-9A-V) 282 * y: Minor version - 1 alphanumerical digit (0-9A-V) 283 * zzzz: Build number - 4 zero padded hex digits */ 284 285 if (pld->info.major < 10) 286 major = pld->info.major + '0'; 287 else 288 major = (pld->info.major - 10) + 'A'; 289 if (pld->info.minor < 10) 290 minor = pld->info.minor + '0'; 291 else 292 minor = (pld->info.minor - 10) + 'A'; 293 294 scnprintf(pld->info.version, sizeof(pld->info.version), "P%X%c%c.%04X", 295 pld->info.number, major, minor, pld->info.buildnr); 296 297 return 0; 298 } 299 300 /* 301 * kempld_register_cells - register cell drivers 302 * 303 * This function registers cell drivers for the detected hardware by calling 304 * the configured kempld_register_cells_XXXX function which is responsible 305 * to detect and register the needed cell drivers. 306 */ 307 static int kempld_register_cells(struct kempld_device_data *pld) 308 { 309 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev); 310 311 return pdata->register_cells(pld); 312 } 313 314 static const char *kempld_get_type_string(struct kempld_device_data *pld) 315 { 316 const char *version_type; 317 318 switch (pld->info.type) { 319 case 0: 320 version_type = "release"; 321 break; 322 case 1: 323 version_type = "debug"; 324 break; 325 case 2: 326 version_type = "custom"; 327 break; 328 default: 329 version_type = "unspecified"; 330 break; 331 } 332 333 return version_type; 334 } 335 336 static ssize_t pld_version_show(struct device *dev, 337 struct device_attribute *attr, char *buf) 338 { 339 struct kempld_device_data *pld = dev_get_drvdata(dev); 340 341 return sysfs_emit(buf, "%s\n", pld->info.version); 342 } 343 344 static ssize_t pld_specification_show(struct device *dev, 345 struct device_attribute *attr, char *buf) 346 { 347 struct kempld_device_data *pld = dev_get_drvdata(dev); 348 349 return sysfs_emit(buf, "%d.%d\n", pld->info.spec_major, pld->info.spec_minor); 350 } 351 352 static ssize_t pld_type_show(struct device *dev, 353 struct device_attribute *attr, char *buf) 354 { 355 struct kempld_device_data *pld = dev_get_drvdata(dev); 356 357 return sysfs_emit(buf, "%s\n", kempld_get_type_string(pld)); 358 } 359 360 static DEVICE_ATTR_RO(pld_version); 361 static DEVICE_ATTR_RO(pld_specification); 362 static DEVICE_ATTR_RO(pld_type); 363 364 static struct attribute *pld_attrs[] = { 365 &dev_attr_pld_version.attr, 366 &dev_attr_pld_specification.attr, 367 &dev_attr_pld_type.attr, 368 NULL 369 }; 370 ATTRIBUTE_GROUPS(pld); 371 372 static int kempld_detect_device(struct kempld_device_data *pld) 373 { 374 u8 index_reg; 375 int ret; 376 377 mutex_lock(&pld->lock); 378 379 /* Check for empty IO space */ 380 index_reg = ioread8(pld->io_index); 381 if (index_reg == 0xff && ioread8(pld->io_data) == 0xff) { 382 mutex_unlock(&pld->lock); 383 return -ENODEV; 384 } 385 386 /* Release hardware mutex if acquired */ 387 if (!(index_reg & KEMPLD_MUTEX_KEY)) { 388 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index); 389 /* PXT and COMe-cPC2 boards may require a second release */ 390 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index); 391 } 392 393 mutex_unlock(&pld->lock); 394 395 ret = kempld_get_info(pld); 396 if (ret) 397 return ret; 398 399 dev_info(pld->dev, "Found Kontron PLD - %s (%s), spec %d.%d\n", 400 pld->info.version, kempld_get_type_string(pld), 401 pld->info.spec_major, pld->info.spec_minor); 402 403 return kempld_register_cells(pld); 404 } 405 406 static int kempld_probe(struct platform_device *pdev) 407 { 408 const struct kempld_platform_data *pdata; 409 struct device *dev = &pdev->dev; 410 struct kempld_device_data *pld; 411 struct resource *ioport; 412 int ret; 413 414 if (IS_ERR_OR_NULL(kempld_pdev)) { 415 /* 416 * No kempld_pdev device has been registered in kempld_init, 417 * so we seem to be probing an ACPI platform device. 418 */ 419 pdata = device_get_match_data(dev); 420 if (!pdata) 421 return -ENODEV; 422 423 ret = platform_device_add_data(pdev, pdata, sizeof(*pdata)); 424 if (ret) 425 return ret; 426 } else if (kempld_pdev == pdev) { 427 pdata = dev_get_platdata(dev); 428 } else { 429 /* 430 * The platform device we are probing is not the one we 431 * registered in kempld_init using the DMI table, so this one 432 * comes from ACPI. 433 * As we can only probe one - abort here and use the DMI 434 * based one instead. 435 */ 436 dev_notice(dev, "platform device exists - not using ACPI\n"); 437 return -ENODEV; 438 } 439 440 pld = devm_kzalloc(dev, sizeof(*pld), GFP_KERNEL); 441 if (!pld) 442 return -ENOMEM; 443 444 ioport = platform_get_resource(pdev, IORESOURCE_IO, 0); 445 if (!ioport) 446 return -EINVAL; 447 448 pld->io_base = devm_ioport_map(dev, ioport->start, 449 resource_size(ioport)); 450 if (!pld->io_base) 451 return -ENOMEM; 452 453 pld->io_index = pld->io_base; 454 pld->io_data = pld->io_base + 1; 455 pld->pld_clock = pdata->pld_clock; 456 pld->dev = dev; 457 458 mutex_init(&pld->lock); 459 platform_set_drvdata(pdev, pld); 460 461 return kempld_detect_device(pld); 462 } 463 464 static void kempld_remove(struct platform_device *pdev) 465 { 466 struct kempld_device_data *pld = platform_get_drvdata(pdev); 467 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev); 468 469 mfd_remove_devices(&pdev->dev); 470 pdata->release_hardware_mutex(pld); 471 } 472 473 static const struct acpi_device_id kempld_acpi_table[] = { 474 { "KEM0000", (kernel_ulong_t)&kempld_platform_data_generic }, 475 { "KEM0001", (kernel_ulong_t)&kempld_platform_data_generic }, 476 {} 477 }; 478 MODULE_DEVICE_TABLE(acpi, kempld_acpi_table); 479 480 static struct platform_driver kempld_driver = { 481 .driver = { 482 .name = "kempld", 483 .acpi_match_table = kempld_acpi_table, 484 .dev_groups = pld_groups, 485 }, 486 .probe = kempld_probe, 487 .remove = kempld_remove, 488 }; 489 490 static const struct dmi_system_id kempld_dmi_table[] __initconst = { 491 { 492 .ident = "BBD6", 493 .matches = { 494 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 495 DMI_MATCH(DMI_BOARD_NAME, "COMe-bBD"), 496 }, 497 }, { 498 .ident = "BBL6", 499 .matches = { 500 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 501 DMI_MATCH(DMI_BOARD_NAME, "COMe-bBL6"), 502 }, 503 }, { 504 .ident = "BDV7", 505 .matches = { 506 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 507 DMI_MATCH(DMI_BOARD_NAME, "COMe-bDV7"), 508 }, 509 }, { 510 .ident = "BHL6", 511 .matches = { 512 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 513 DMI_MATCH(DMI_BOARD_NAME, "COMe-bHL6"), 514 }, 515 }, { 516 .ident = "BKL6", 517 .matches = { 518 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 519 DMI_MATCH(DMI_BOARD_NAME, "COMe-bKL6"), 520 }, 521 }, { 522 .ident = "BSL6", 523 .matches = { 524 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 525 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSL6"), 526 }, 527 }, { 528 .ident = "CAL6", 529 .matches = { 530 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 531 DMI_MATCH(DMI_BOARD_NAME, "COMe-cAL"), 532 }, 533 }, { 534 .ident = "CBL6", 535 .matches = { 536 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 537 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBL6"), 538 }, 539 }, { 540 .ident = "CBW6", 541 .matches = { 542 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 543 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBW6"), 544 }, 545 }, { 546 .ident = "CCR2", 547 .matches = { 548 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 549 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP2"), 550 }, 551 }, { 552 .ident = "CCR6", 553 .matches = { 554 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 555 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP6"), 556 }, 557 }, { 558 .ident = "CDV7", 559 .matches = { 560 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 561 DMI_MATCH(DMI_BOARD_NAME, "COMe-cDV7"), 562 }, 563 }, { 564 .ident = "CHL6", 565 .matches = { 566 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 567 DMI_MATCH(DMI_BOARD_NAME, "COMe-cHL6"), 568 }, 569 }, { 570 .ident = "CHR2", 571 .matches = { 572 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 573 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T2"), 574 }, 575 }, { 576 .ident = "CHR2", 577 .matches = { 578 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 579 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T2"), 580 }, 581 }, { 582 .ident = "CHR2", 583 .matches = { 584 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 585 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC2"), 586 }, 587 }, { 588 .ident = "CHR6", 589 .matches = { 590 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 591 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T6"), 592 }, 593 }, { 594 .ident = "CHR6", 595 .matches = { 596 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 597 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T6"), 598 }, 599 }, { 600 .ident = "CHR6", 601 .matches = { 602 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 603 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC6"), 604 }, 605 }, { 606 .ident = "CKL6", 607 .matches = { 608 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 609 DMI_MATCH(DMI_BOARD_NAME, "COMe-cKL6"), 610 }, 611 }, { 612 .ident = "CNTG", 613 .matches = { 614 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 615 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-PC"), 616 }, 617 }, { 618 .ident = "CNTG", 619 .matches = { 620 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 621 DMI_MATCH(DMI_BOARD_NAME, "COMe-bPC2"), 622 }, 623 }, { 624 .ident = "CNTX", 625 .matches = { 626 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 627 DMI_MATCH(DMI_BOARD_NAME, "PXT"), 628 }, 629 }, { 630 .ident = "CSL6", 631 .matches = { 632 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 633 DMI_MATCH(DMI_BOARD_NAME, "COMe-cSL6"), 634 }, 635 }, { 636 .ident = "CVV6", 637 .matches = { 638 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 639 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBT"), 640 }, 641 }, { 642 .ident = "FRI2", 643 .matches = { 644 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 645 DMI_MATCH(DMI_BIOS_VERSION, "FRI2"), 646 }, 647 }, { 648 .ident = "FRI2", 649 .matches = { 650 DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"), 651 }, 652 }, { 653 .ident = "A203", 654 .matches = { 655 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 656 DMI_MATCH(DMI_BOARD_NAME, "KBox A-203"), 657 }, 658 }, { 659 .ident = "M4A1", 660 .matches = { 661 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 662 DMI_MATCH(DMI_BOARD_NAME, "COMe-m4AL"), 663 }, 664 }, { 665 .ident = "MAL1", 666 .matches = { 667 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 668 DMI_MATCH(DMI_BOARD_NAME, "COMe-mAL10"), 669 }, 670 }, { 671 .ident = "MAPL", 672 .matches = { 673 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 674 DMI_MATCH(DMI_BOARD_NAME, "mITX-APL"), 675 }, 676 }, { 677 .ident = "MBR1", 678 .matches = { 679 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 680 DMI_MATCH(DMI_BOARD_NAME, "ETX-OH"), 681 }, 682 }, { 683 .ident = "MVV1", 684 .matches = { 685 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 686 DMI_MATCH(DMI_BOARD_NAME, "COMe-mBT"), 687 }, 688 }, { 689 .ident = "NTC1", 690 .matches = { 691 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 692 DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"), 693 }, 694 }, { 695 .ident = "NTC1", 696 .matches = { 697 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 698 DMI_MATCH(DMI_BOARD_NAME, "nETXe-TT"), 699 }, 700 }, { 701 .ident = "NTC1", 702 .matches = { 703 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 704 DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"), 705 }, 706 }, { 707 .ident = "NUP1", 708 .matches = { 709 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 710 DMI_MATCH(DMI_BOARD_NAME, "COMe-mCT"), 711 }, 712 }, { 713 .ident = "PAPL", 714 .matches = { 715 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 716 DMI_MATCH(DMI_BOARD_NAME, "pITX-APL"), 717 }, 718 }, { 719 .ident = "SXAL", 720 .matches = { 721 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 722 DMI_MATCH(DMI_BOARD_NAME, "SMARC-sXAL"), 723 }, 724 }, { 725 .ident = "SXAL4", 726 .matches = { 727 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 728 DMI_MATCH(DMI_BOARD_NAME, "SMARC-sXA4"), 729 }, 730 }, { 731 .ident = "UNP1", 732 .matches = { 733 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 734 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-DC"), 735 }, 736 }, { 737 .ident = "UNP1", 738 .matches = { 739 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 740 DMI_MATCH(DMI_BOARD_NAME, "COMe-cDC2"), 741 }, 742 }, { 743 .ident = "UNTG", 744 .matches = { 745 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 746 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-PC"), 747 }, 748 }, { 749 .ident = "UNTG", 750 .matches = { 751 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 752 DMI_MATCH(DMI_BOARD_NAME, "COMe-cPC2"), 753 }, 754 }, { 755 .ident = "UUP6", 756 .matches = { 757 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 758 DMI_MATCH(DMI_BOARD_NAME, "COMe-cCT6"), 759 }, 760 }, { 761 .ident = "UTH6", 762 .matches = { 763 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 764 DMI_MATCH(DMI_BOARD_NAME, "COMe-cTH6"), 765 }, 766 }, { 767 .ident = "Q7AL", 768 .matches = { 769 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), 770 DMI_MATCH(DMI_BOARD_NAME, "Qseven-Q7AL"), 771 }, 772 }, 773 {} 774 }; 775 MODULE_DEVICE_TABLE(dmi, kempld_dmi_table); 776 777 static int __init kempld_init(void) 778 { 779 const struct dmi_system_id *id; 780 781 /* 782 * This custom DMI iteration allows the driver to be initialized in three ways: 783 * - When a forced_device_id string matches any ident in the kempld_dmi_table, 784 * regardless of whether the DMI device is present in the system dmi table. 785 * - When a matching entry is present in the DMI system tabe. 786 * - Through alternative mechanisms like ACPI. 787 */ 788 if (force_device_id[0]) { 789 for (id = kempld_dmi_table; id->matches[0].slot != DMI_NONE; id++) 790 if (strstr(id->ident, force_device_id)) 791 if (!kempld_create_platform_device(&kempld_platform_data_generic)) 792 break; 793 if (id->matches[0].slot == DMI_NONE) 794 return -ENODEV; 795 } else { 796 for (id = dmi_first_match(kempld_dmi_table); id; id = dmi_first_match(id+1)) 797 if (kempld_create_platform_device(&kempld_platform_data_generic)) 798 break; 799 } 800 return platform_driver_register(&kempld_driver); 801 } 802 803 static void __exit kempld_exit(void) 804 { 805 platform_device_unregister(kempld_pdev); 806 platform_driver_unregister(&kempld_driver); 807 } 808 809 module_init(kempld_init); 810 module_exit(kempld_exit); 811 812 MODULE_DESCRIPTION("KEM PLD Core Driver"); 813 MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>"); 814 MODULE_LICENSE("GPL"); 815 MODULE_ALIAS("platform:kempld-core"); 816