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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
22static char force_device_id[MAX_ID_LEN + 1] = "";
23module_param_string(force_device_id, force_device_id,
24 sizeof(force_device_id), 0);
25MODULE_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 */
32static 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
39static 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
45static 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
79enum kempld_cells {
80 KEMPLD_I2C = 0,
81 KEMPLD_WDT,
82 KEMPLD_GPIO,
83 KEMPLD_UART,
84};
85
86static 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
95static 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
115static struct resource kempld_ioresource = {
116 .start = KEMPLD_IOINDEX,
117 .end = KEMPLD_IODATA,
118 .flags = IORESOURCE_IO,
119};
120
121static 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
130static struct platform_device *kempld_pdev;
131
132static 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 */
155u8 kempld_read8(struct kempld_device_data *pld, u8 index)
156{
157 iowrite8(index, pld->io_index);
158 return ioread8(pld->io_data);
159}
160EXPORT_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 */
170void 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}
175EXPORT_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 */
184u16 kempld_read16(struct kempld_device_data *pld, u8 index)
185{
186 return kempld_read8(pld, index) | kempld_read8(pld, index + 1) << 8;
187}
188EXPORT_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 */
198void 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}
203EXPORT_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 */
212u32 kempld_read32(struct kempld_device_data *pld, u8 index)
213{
214 return kempld_read16(pld, index) | kempld_read16(pld, index + 2) << 16;
215}
216EXPORT_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 */
226void 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}
231EXPORT_SYMBOL_GPL(kempld_write32);
232
233/**
234 * kempld_get_mutex - acquire PLD mutex
235 * @pld: kempld_device_data structure describing the PLD
236 */
237void 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}
244EXPORT_SYMBOL_GPL(kempld_get_mutex);
245
246/**
247 * kempld_release_mutex - release PLD mutex
248 * @pld: kempld_device_data structure describing the PLD
249 */
250void 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}
257EXPORT_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 */
267static 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 */
307static 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
314static 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
336static 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
344static 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
352static 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
360static DEVICE_ATTR_RO(pld_version);
361static DEVICE_ATTR_RO(pld_specification);
362static DEVICE_ATTR_RO(pld_type);
363
364static 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};
370ATTRIBUTE_GROUPS(pld);
371
372static 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
406static 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
464static 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
473static 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};
478MODULE_DEVICE_TABLE(acpi, kempld_acpi_table);
479
480static 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
490static 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};
775MODULE_DEVICE_TABLE(dmi, kempld_dmi_table);
776
777static 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
803static void __exit kempld_exit(void)
804{
805 platform_device_unregister(kempld_pdev);
806 platform_driver_unregister(&kempld_driver);
807}
808
809module_init(kempld_init);
810module_exit(kempld_exit);
811
812MODULE_DESCRIPTION("KEM PLD Core Driver");
813MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>");
814MODULE_LICENSE("GPL");
815MODULE_ALIAS("platform:kempld-core");