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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/platform_device.h>
10#include <linux/mfd/core.h>
11#include <linux/mfd/kempld.h>
12#include <linux/module.h>
13#include <linux/dmi.h>
14#include <linux/io.h>
15#include <linux/delay.h>
16
17#define MAX_ID_LEN 4
18static char force_device_id[MAX_ID_LEN + 1] = "";
19module_param_string(force_device_id, force_device_id,
20 sizeof(force_device_id), 0);
21MODULE_PARM_DESC(force_device_id, "Override detected product");
22
23/*
24 * Get hardware mutex to block firmware from accessing the pld.
25 * It is possible for the firmware may hold the mutex for an extended length of
26 * time. This function will block until access has been granted.
27 */
28static void kempld_get_hardware_mutex(struct kempld_device_data *pld)
29{
30 /* The mutex bit will read 1 until access has been granted */
31 while (ioread8(pld->io_index) & KEMPLD_MUTEX_KEY)
32 usleep_range(1000, 3000);
33}
34
35static void kempld_release_hardware_mutex(struct kempld_device_data *pld)
36{
37 /* The harware mutex is released when 1 is written to the mutex bit. */
38 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
39}
40
41static int kempld_get_info_generic(struct kempld_device_data *pld)
42{
43 u16 version;
44 u8 spec;
45
46 kempld_get_mutex(pld);
47
48 version = kempld_read16(pld, KEMPLD_VERSION);
49 spec = kempld_read8(pld, KEMPLD_SPEC);
50 pld->info.buildnr = kempld_read16(pld, KEMPLD_BUILDNR);
51
52 pld->info.minor = KEMPLD_VERSION_GET_MINOR(version);
53 pld->info.major = KEMPLD_VERSION_GET_MAJOR(version);
54 pld->info.number = KEMPLD_VERSION_GET_NUMBER(version);
55 pld->info.type = KEMPLD_VERSION_GET_TYPE(version);
56
57 if (spec == 0xff) {
58 pld->info.spec_minor = 0;
59 pld->info.spec_major = 1;
60 } else {
61 pld->info.spec_minor = KEMPLD_SPEC_GET_MINOR(spec);
62 pld->info.spec_major = KEMPLD_SPEC_GET_MAJOR(spec);
63 }
64
65 if (pld->info.spec_major > 0)
66 pld->feature_mask = kempld_read16(pld, KEMPLD_FEATURE);
67 else
68 pld->feature_mask = 0;
69
70 kempld_release_mutex(pld);
71
72 return 0;
73}
74
75enum kempld_cells {
76 KEMPLD_I2C = 0,
77 KEMPLD_WDT,
78 KEMPLD_GPIO,
79 KEMPLD_UART,
80};
81
82static const char *kempld_dev_names[] = {
83 [KEMPLD_I2C] = "kempld-i2c",
84 [KEMPLD_WDT] = "kempld-wdt",
85 [KEMPLD_GPIO] = "kempld-gpio",
86 [KEMPLD_UART] = "kempld-uart",
87};
88
89#define KEMPLD_MAX_DEVS ARRAY_SIZE(kempld_dev_names)
90
91static int kempld_register_cells_generic(struct kempld_device_data *pld)
92{
93 struct mfd_cell devs[KEMPLD_MAX_DEVS] = {};
94 int i = 0;
95
96 if (pld->feature_mask & KEMPLD_FEATURE_BIT_I2C)
97 devs[i++].name = kempld_dev_names[KEMPLD_I2C];
98
99 if (pld->feature_mask & KEMPLD_FEATURE_BIT_WATCHDOG)
100 devs[i++].name = kempld_dev_names[KEMPLD_WDT];
101
102 if (pld->feature_mask & KEMPLD_FEATURE_BIT_GPIO)
103 devs[i++].name = kempld_dev_names[KEMPLD_GPIO];
104
105 if (pld->feature_mask & KEMPLD_FEATURE_MASK_UART)
106 devs[i++].name = kempld_dev_names[KEMPLD_UART];
107
108 return mfd_add_devices(pld->dev, -1, devs, i, NULL, 0, NULL);
109}
110
111static struct resource kempld_ioresource = {
112 .start = KEMPLD_IOINDEX,
113 .end = KEMPLD_IODATA,
114 .flags = IORESOURCE_IO,
115};
116
117static const struct kempld_platform_data kempld_platform_data_generic = {
118 .pld_clock = KEMPLD_CLK,
119 .ioresource = &kempld_ioresource,
120 .get_hardware_mutex = kempld_get_hardware_mutex,
121 .release_hardware_mutex = kempld_release_hardware_mutex,
122 .get_info = kempld_get_info_generic,
123 .register_cells = kempld_register_cells_generic,
124};
125
126static struct platform_device *kempld_pdev;
127
128static int kempld_create_platform_device(const struct dmi_system_id *id)
129{
130 const struct kempld_platform_data *pdata = id->driver_data;
131 int ret;
132
133 kempld_pdev = platform_device_alloc("kempld", -1);
134 if (!kempld_pdev)
135 return -ENOMEM;
136
137 ret = platform_device_add_data(kempld_pdev, pdata, sizeof(*pdata));
138 if (ret)
139 goto err;
140
141 ret = platform_device_add_resources(kempld_pdev, pdata->ioresource, 1);
142 if (ret)
143 goto err;
144
145 ret = platform_device_add(kempld_pdev);
146 if (ret)
147 goto err;
148
149 return 0;
150err:
151 platform_device_put(kempld_pdev);
152 return ret;
153}
154
155/**
156 * kempld_read8 - read 8 bit register
157 * @pld: kempld_device_data structure describing the PLD
158 * @index: register index on the chip
159 *
160 * kempld_get_mutex must be called prior to calling this function.
161 */
162u8 kempld_read8(struct kempld_device_data *pld, u8 index)
163{
164 iowrite8(index, pld->io_index);
165 return ioread8(pld->io_data);
166}
167EXPORT_SYMBOL_GPL(kempld_read8);
168
169/**
170 * kempld_write8 - write 8 bit register
171 * @pld: kempld_device_data structure describing the PLD
172 * @index: register index on the chip
173 * @data: new register value
174 *
175 * kempld_get_mutex must be called prior to calling this function.
176 */
177void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data)
178{
179 iowrite8(index, pld->io_index);
180 iowrite8(data, pld->io_data);
181}
182EXPORT_SYMBOL_GPL(kempld_write8);
183
184/**
185 * kempld_read16 - read 16 bit register
186 * @pld: kempld_device_data structure describing the PLD
187 * @index: register index on the chip
188 *
189 * kempld_get_mutex must be called prior to calling this function.
190 */
191u16 kempld_read16(struct kempld_device_data *pld, u8 index)
192{
193 return kempld_read8(pld, index) | kempld_read8(pld, index + 1) << 8;
194}
195EXPORT_SYMBOL_GPL(kempld_read16);
196
197/**
198 * kempld_write16 - write 16 bit register
199 * @pld: kempld_device_data structure describing the PLD
200 * @index: register index on the chip
201 * @data: new register value
202 *
203 * kempld_get_mutex must be called prior to calling this function.
204 */
205void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data)
206{
207 kempld_write8(pld, index, (u8)data);
208 kempld_write8(pld, index + 1, (u8)(data >> 8));
209}
210EXPORT_SYMBOL_GPL(kempld_write16);
211
212/**
213 * kempld_read32 - read 32 bit register
214 * @pld: kempld_device_data structure describing the PLD
215 * @index: register index on the chip
216 *
217 * kempld_get_mutex must be called prior to calling this function.
218 */
219u32 kempld_read32(struct kempld_device_data *pld, u8 index)
220{
221 return kempld_read16(pld, index) | kempld_read16(pld, index + 2) << 16;
222}
223EXPORT_SYMBOL_GPL(kempld_read32);
224
225/**
226 * kempld_write32 - write 32 bit register
227 * @pld: kempld_device_data structure describing the PLD
228 * @index: register index on the chip
229 * @data: new register value
230 *
231 * kempld_get_mutex must be called prior to calling this function.
232 */
233void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data)
234{
235 kempld_write16(pld, index, (u16)data);
236 kempld_write16(pld, index + 2, (u16)(data >> 16));
237}
238EXPORT_SYMBOL_GPL(kempld_write32);
239
240/**
241 * kempld_get_mutex - acquire PLD mutex
242 * @pld: kempld_device_data structure describing the PLD
243 */
244void kempld_get_mutex(struct kempld_device_data *pld)
245{
246 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
247
248 mutex_lock(&pld->lock);
249 pdata->get_hardware_mutex(pld);
250}
251EXPORT_SYMBOL_GPL(kempld_get_mutex);
252
253/**
254 * kempld_release_mutex - release PLD mutex
255 * @pld: kempld_device_data structure describing the PLD
256 */
257void kempld_release_mutex(struct kempld_device_data *pld)
258{
259 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
260
261 pdata->release_hardware_mutex(pld);
262 mutex_unlock(&pld->lock);
263}
264EXPORT_SYMBOL_GPL(kempld_release_mutex);
265
266/**
267 * kempld_get_info - update device specific information
268 * @pld: kempld_device_data structure describing the PLD
269 *
270 * This function calls the configured board specific kempld_get_info_XXXX
271 * function which is responsible for gathering information about the specific
272 * hardware. The information is then stored within the pld structure.
273 */
274static int kempld_get_info(struct kempld_device_data *pld)
275{
276 int ret;
277 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
278 char major, minor;
279
280 ret = pdata->get_info(pld);
281 if (ret)
282 return ret;
283
284 /* The Kontron PLD firmware version string has the following format:
285 * Pwxy.zzzz
286 * P: Fixed
287 * w: PLD number - 1 hex digit
288 * x: Major version - 1 alphanumerical digit (0-9A-V)
289 * y: Minor version - 1 alphanumerical digit (0-9A-V)
290 * zzzz: Build number - 4 zero padded hex digits */
291
292 if (pld->info.major < 10)
293 major = pld->info.major + '0';
294 else
295 major = (pld->info.major - 10) + 'A';
296 if (pld->info.minor < 10)
297 minor = pld->info.minor + '0';
298 else
299 minor = (pld->info.minor - 10) + 'A';
300
301 ret = scnprintf(pld->info.version, sizeof(pld->info.version),
302 "P%X%c%c.%04X", pld->info.number, major, minor,
303 pld->info.buildnr);
304 if (ret < 0)
305 return ret;
306
307 return 0;
308}
309
310/*
311 * kempld_register_cells - register cell drivers
312 *
313 * This function registers cell drivers for the detected hardware by calling
314 * the configured kempld_register_cells_XXXX function which is responsible
315 * to detect and register the needed cell drivers.
316 */
317static int kempld_register_cells(struct kempld_device_data *pld)
318{
319 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
320
321 return pdata->register_cells(pld);
322}
323
324static const char *kempld_get_type_string(struct kempld_device_data *pld)
325{
326 const char *version_type;
327
328 switch (pld->info.type) {
329 case 0:
330 version_type = "release";
331 break;
332 case 1:
333 version_type = "debug";
334 break;
335 case 2:
336 version_type = "custom";
337 break;
338 default:
339 version_type = "unspecified";
340 break;
341 }
342
343 return version_type;
344}
345
346static ssize_t kempld_version_show(struct device *dev,
347 struct device_attribute *attr, char *buf)
348{
349 struct kempld_device_data *pld = dev_get_drvdata(dev);
350
351 return scnprintf(buf, PAGE_SIZE, "%s\n", pld->info.version);
352}
353
354static ssize_t kempld_specification_show(struct device *dev,
355 struct device_attribute *attr, char *buf)
356{
357 struct kempld_device_data *pld = dev_get_drvdata(dev);
358
359 return scnprintf(buf, PAGE_SIZE, "%d.%d\n", pld->info.spec_major,
360 pld->info.spec_minor);
361}
362
363static ssize_t kempld_type_show(struct device *dev,
364 struct device_attribute *attr, char *buf)
365{
366 struct kempld_device_data *pld = dev_get_drvdata(dev);
367
368 return scnprintf(buf, PAGE_SIZE, "%s\n", kempld_get_type_string(pld));
369}
370
371static DEVICE_ATTR(pld_version, S_IRUGO, kempld_version_show, NULL);
372static DEVICE_ATTR(pld_specification, S_IRUGO, kempld_specification_show,
373 NULL);
374static DEVICE_ATTR(pld_type, S_IRUGO, kempld_type_show, NULL);
375
376static struct attribute *pld_attributes[] = {
377 &dev_attr_pld_version.attr,
378 &dev_attr_pld_specification.attr,
379 &dev_attr_pld_type.attr,
380 NULL
381};
382
383static const struct attribute_group pld_attr_group = {
384 .attrs = pld_attributes,
385};
386
387static int kempld_detect_device(struct kempld_device_data *pld)
388{
389 u8 index_reg;
390 int ret;
391
392 mutex_lock(&pld->lock);
393
394 /* Check for empty IO space */
395 index_reg = ioread8(pld->io_index);
396 if (index_reg == 0xff && ioread8(pld->io_data) == 0xff) {
397 mutex_unlock(&pld->lock);
398 return -ENODEV;
399 }
400
401 /* Release hardware mutex if acquired */
402 if (!(index_reg & KEMPLD_MUTEX_KEY)) {
403 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
404 /* PXT and COMe-cPC2 boards may require a second release */
405 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
406 }
407
408 mutex_unlock(&pld->lock);
409
410 ret = kempld_get_info(pld);
411 if (ret)
412 return ret;
413
414 dev_info(pld->dev, "Found Kontron PLD - %s (%s), spec %d.%d\n",
415 pld->info.version, kempld_get_type_string(pld),
416 pld->info.spec_major, pld->info.spec_minor);
417
418 ret = sysfs_create_group(&pld->dev->kobj, &pld_attr_group);
419 if (ret)
420 return ret;
421
422 ret = kempld_register_cells(pld);
423 if (ret)
424 sysfs_remove_group(&pld->dev->kobj, &pld_attr_group);
425
426 return ret;
427}
428
429static int kempld_probe(struct platform_device *pdev)
430{
431 const struct kempld_platform_data *pdata =
432 dev_get_platdata(&pdev->dev);
433 struct device *dev = &pdev->dev;
434 struct kempld_device_data *pld;
435 struct resource *ioport;
436
437 pld = devm_kzalloc(dev, sizeof(*pld), GFP_KERNEL);
438 if (!pld)
439 return -ENOMEM;
440
441 ioport = platform_get_resource(pdev, IORESOURCE_IO, 0);
442 if (!ioport)
443 return -EINVAL;
444
445 pld->io_base = devm_ioport_map(dev, ioport->start,
446 resource_size(ioport));
447 if (!pld->io_base)
448 return -ENOMEM;
449
450 pld->io_index = pld->io_base;
451 pld->io_data = pld->io_base + 1;
452 pld->pld_clock = pdata->pld_clock;
453 pld->dev = dev;
454
455 mutex_init(&pld->lock);
456 platform_set_drvdata(pdev, pld);
457
458 return kempld_detect_device(pld);
459}
460
461static int kempld_remove(struct platform_device *pdev)
462{
463 struct kempld_device_data *pld = platform_get_drvdata(pdev);
464 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
465
466 sysfs_remove_group(&pld->dev->kobj, &pld_attr_group);
467
468 mfd_remove_devices(&pdev->dev);
469 pdata->release_hardware_mutex(pld);
470
471 return 0;
472}
473
474static struct platform_driver kempld_driver = {
475 .driver = {
476 .name = "kempld",
477 },
478 .probe = kempld_probe,
479 .remove = kempld_remove,
480};
481
482static const struct dmi_system_id kempld_dmi_table[] __initconst = {
483 {
484 .ident = "BBD6",
485 .matches = {
486 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
487 DMI_MATCH(DMI_BOARD_NAME, "COMe-bBD"),
488 },
489 .driver_data = (void *)&kempld_platform_data_generic,
490 .callback = kempld_create_platform_device,
491 }, {
492 .ident = "BBL6",
493 .matches = {
494 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
495 DMI_MATCH(DMI_BOARD_NAME, "COMe-bBL6"),
496 },
497 .driver_data = (void *)&kempld_platform_data_generic,
498 .callback = kempld_create_platform_device,
499 }, {
500 .ident = "BHL6",
501 .matches = {
502 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
503 DMI_MATCH(DMI_BOARD_NAME, "COMe-bHL6"),
504 },
505 .driver_data = (void *)&kempld_platform_data_generic,
506 .callback = kempld_create_platform_device,
507 }, {
508 .ident = "BKL6",
509 .matches = {
510 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
511 DMI_MATCH(DMI_BOARD_NAME, "COMe-bKL6"),
512 },
513 .driver_data = (void *)&kempld_platform_data_generic,
514 .callback = kempld_create_platform_device,
515 }, {
516 .ident = "BSL6",
517 .matches = {
518 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
519 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSL6"),
520 },
521 .driver_data = (void *)&kempld_platform_data_generic,
522 .callback = kempld_create_platform_device,
523 }, {
524 .ident = "CAL6",
525 .matches = {
526 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
527 DMI_MATCH(DMI_BOARD_NAME, "COMe-cAL"),
528 },
529 .driver_data = (void *)&kempld_platform_data_generic,
530 .callback = kempld_create_platform_device,
531 }, {
532 .ident = "CBL6",
533 .matches = {
534 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
535 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBL6"),
536 },
537 .driver_data = (void *)&kempld_platform_data_generic,
538 .callback = kempld_create_platform_device,
539 }, {
540 .ident = "CBW6",
541 .matches = {
542 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
543 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBW6"),
544 },
545 .driver_data = (void *)&kempld_platform_data_generic,
546 .callback = kempld_create_platform_device,
547 }, {
548 .ident = "CCR2",
549 .matches = {
550 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
551 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP2"),
552 },
553 .driver_data = (void *)&kempld_platform_data_generic,
554 .callback = kempld_create_platform_device,
555 }, {
556 .ident = "CCR6",
557 .matches = {
558 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
559 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP6"),
560 },
561 .driver_data = (void *)&kempld_platform_data_generic,
562 .callback = kempld_create_platform_device,
563 }, {
564 .ident = "CHL6",
565 .matches = {
566 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
567 DMI_MATCH(DMI_BOARD_NAME, "COMe-cHL6"),
568 },
569 .driver_data = (void *)&kempld_platform_data_generic,
570 .callback = kempld_create_platform_device,
571 }, {
572 .ident = "CHR2",
573 .matches = {
574 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
575 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T2"),
576 },
577 .driver_data = (void *)&kempld_platform_data_generic,
578 .callback = kempld_create_platform_device,
579 }, {
580 .ident = "CHR2",
581 .matches = {
582 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
583 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T2"),
584 },
585 .driver_data = (void *)&kempld_platform_data_generic,
586 .callback = kempld_create_platform_device,
587 }, {
588 .ident = "CHR2",
589 .matches = {
590 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
591 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC2"),
592 },
593 .driver_data = (void *)&kempld_platform_data_generic,
594 .callback = kempld_create_platform_device,
595 }, {
596 .ident = "CHR6",
597 .matches = {
598 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
599 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T6"),
600 },
601 .driver_data = (void *)&kempld_platform_data_generic,
602 .callback = kempld_create_platform_device,
603 }, {
604 .ident = "CHR6",
605 .matches = {
606 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
607 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T6"),
608 },
609 .driver_data = (void *)&kempld_platform_data_generic,
610 .callback = kempld_create_platform_device,
611 }, {
612 .ident = "CHR6",
613 .matches = {
614 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
615 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC6"),
616 },
617 .driver_data = (void *)&kempld_platform_data_generic,
618 .callback = kempld_create_platform_device,
619 }, {
620 .ident = "CKL6",
621 .matches = {
622 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
623 DMI_MATCH(DMI_BOARD_NAME, "COMe-cKL6"),
624 },
625 .driver_data = (void *)&kempld_platform_data_generic,
626 .callback = kempld_create_platform_device,
627 }, {
628 .ident = "CNTG",
629 .matches = {
630 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
631 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-PC"),
632 },
633 .driver_data = (void *)&kempld_platform_data_generic,
634 .callback = kempld_create_platform_device,
635 }, {
636 .ident = "CNTG",
637 .matches = {
638 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
639 DMI_MATCH(DMI_BOARD_NAME, "COMe-bPC2"),
640 },
641 .driver_data = (void *)&kempld_platform_data_generic,
642 .callback = kempld_create_platform_device,
643 }, {
644 .ident = "CNTX",
645 .matches = {
646 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
647 DMI_MATCH(DMI_BOARD_NAME, "PXT"),
648 },
649 .driver_data = (void *)&kempld_platform_data_generic,
650 .callback = kempld_create_platform_device,
651 }, {
652 .ident = "CSL6",
653 .matches = {
654 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
655 DMI_MATCH(DMI_BOARD_NAME, "COMe-cSL6"),
656 },
657 .driver_data = (void *)&kempld_platform_data_generic,
658 .callback = kempld_create_platform_device,
659 }, {
660 .ident = "CVV6",
661 .matches = {
662 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
663 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBT"),
664 },
665 .driver_data = (void *)&kempld_platform_data_generic,
666 .callback = kempld_create_platform_device,
667 }, {
668 .ident = "FRI2",
669 .matches = {
670 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
671 DMI_MATCH(DMI_BIOS_VERSION, "FRI2"),
672 },
673 .driver_data = (void *)&kempld_platform_data_generic,
674 .callback = kempld_create_platform_device,
675 }, {
676 .ident = "FRI2",
677 .matches = {
678 DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"),
679 },
680 .driver_data = (void *)&kempld_platform_data_generic,
681 .callback = kempld_create_platform_device,
682 }, {
683 .ident = "MAL1",
684 .matches = {
685 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
686 DMI_MATCH(DMI_BOARD_NAME, "COMe-mAL10"),
687 },
688 .driver_data = (void *)&kempld_platform_data_generic,
689 .callback = kempld_create_platform_device,
690 }, {
691 .ident = "MBR1",
692 .matches = {
693 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
694 DMI_MATCH(DMI_BOARD_NAME, "ETX-OH"),
695 },
696 .driver_data = (void *)&kempld_platform_data_generic,
697 .callback = kempld_create_platform_device,
698 }, {
699 .ident = "MVV1",
700 .matches = {
701 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
702 DMI_MATCH(DMI_BOARD_NAME, "COMe-mBT"),
703 },
704 .driver_data = (void *)&kempld_platform_data_generic,
705 .callback = kempld_create_platform_device,
706 }, {
707 .ident = "NTC1",
708 .matches = {
709 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
710 DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"),
711 },
712 .driver_data = (void *)&kempld_platform_data_generic,
713 .callback = kempld_create_platform_device,
714 }, {
715 .ident = "NTC1",
716 .matches = {
717 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
718 DMI_MATCH(DMI_BOARD_NAME, "nETXe-TT"),
719 },
720 .driver_data = (void *)&kempld_platform_data_generic,
721 .callback = kempld_create_platform_device,
722 }, {
723 .ident = "NTC1",
724 .matches = {
725 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
726 DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"),
727 },
728 .driver_data = (void *)&kempld_platform_data_generic,
729 .callback = kempld_create_platform_device,
730 }, {
731 .ident = "NUP1",
732 .matches = {
733 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
734 DMI_MATCH(DMI_BOARD_NAME, "COMe-mCT"),
735 },
736 .driver_data = (void *)&kempld_platform_data_generic,
737 .callback = kempld_create_platform_device,
738 }, {
739 .ident = "UNP1",
740 .matches = {
741 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
742 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-DC"),
743 },
744 .driver_data = (void *)&kempld_platform_data_generic,
745 .callback = kempld_create_platform_device,
746 }, {
747 .ident = "UNP1",
748 .matches = {
749 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
750 DMI_MATCH(DMI_BOARD_NAME, "COMe-cDC2"),
751 },
752 .driver_data = (void *)&kempld_platform_data_generic,
753 .callback = kempld_create_platform_device,
754 }, {
755 .ident = "UNTG",
756 .matches = {
757 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
758 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-PC"),
759 },
760 .driver_data = (void *)&kempld_platform_data_generic,
761 .callback = kempld_create_platform_device,
762 }, {
763 .ident = "UNTG",
764 .matches = {
765 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
766 DMI_MATCH(DMI_BOARD_NAME, "COMe-cPC2"),
767 },
768 .driver_data = (void *)&kempld_platform_data_generic,
769 .callback = kempld_create_platform_device,
770 }, {
771 .ident = "UUP6",
772 .matches = {
773 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
774 DMI_MATCH(DMI_BOARD_NAME, "COMe-cCT6"),
775 },
776 .driver_data = (void *)&kempld_platform_data_generic,
777 .callback = kempld_create_platform_device,
778 },
779 {
780 .ident = "UTH6",
781 .matches = {
782 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
783 DMI_MATCH(DMI_BOARD_NAME, "COMe-cTH6"),
784 },
785 .driver_data = (void *)&kempld_platform_data_generic,
786 .callback = kempld_create_platform_device,
787 },
788 {}
789};
790MODULE_DEVICE_TABLE(dmi, kempld_dmi_table);
791
792static int __init kempld_init(void)
793{
794 const struct dmi_system_id *id;
795
796 if (force_device_id[0]) {
797 for (id = kempld_dmi_table;
798 id->matches[0].slot != DMI_NONE; id++)
799 if (strstr(id->ident, force_device_id))
800 if (id->callback && !id->callback(id))
801 break;
802 if (id->matches[0].slot == DMI_NONE)
803 return -ENODEV;
804 } else {
805 if (!dmi_check_system(kempld_dmi_table))
806 return -ENODEV;
807 }
808
809 return platform_driver_register(&kempld_driver);
810}
811
812static void __exit kempld_exit(void)
813{
814 if (kempld_pdev)
815 platform_device_unregister(kempld_pdev);
816
817 platform_driver_unregister(&kempld_driver);
818}
819
820module_init(kempld_init);
821module_exit(kempld_exit);
822
823MODULE_DESCRIPTION("KEM PLD Core Driver");
824MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>");
825MODULE_LICENSE("GPL");
826MODULE_ALIAS("platform:kempld-core");
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/platform_device.h>
10#include <linux/mfd/core.h>
11#include <linux/mfd/kempld.h>
12#include <linux/module.h>
13#include <linux/dmi.h>
14#include <linux/io.h>
15#include <linux/delay.h>
16
17#define MAX_ID_LEN 4
18static char force_device_id[MAX_ID_LEN + 1] = "";
19module_param_string(force_device_id, force_device_id,
20 sizeof(force_device_id), 0);
21MODULE_PARM_DESC(force_device_id, "Override detected product");
22
23/*
24 * Get hardware mutex to block firmware from accessing the pld.
25 * It is possible for the firmware may hold the mutex for an extended length of
26 * time. This function will block until access has been granted.
27 */
28static void kempld_get_hardware_mutex(struct kempld_device_data *pld)
29{
30 /* The mutex bit will read 1 until access has been granted */
31 while (ioread8(pld->io_index) & KEMPLD_MUTEX_KEY)
32 usleep_range(1000, 3000);
33}
34
35static void kempld_release_hardware_mutex(struct kempld_device_data *pld)
36{
37 /* The harware mutex is released when 1 is written to the mutex bit. */
38 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
39}
40
41static int kempld_get_info_generic(struct kempld_device_data *pld)
42{
43 u16 version;
44 u8 spec;
45
46 kempld_get_mutex(pld);
47
48 version = kempld_read16(pld, KEMPLD_VERSION);
49 spec = kempld_read8(pld, KEMPLD_SPEC);
50 pld->info.buildnr = kempld_read16(pld, KEMPLD_BUILDNR);
51
52 pld->info.minor = KEMPLD_VERSION_GET_MINOR(version);
53 pld->info.major = KEMPLD_VERSION_GET_MAJOR(version);
54 pld->info.number = KEMPLD_VERSION_GET_NUMBER(version);
55 pld->info.type = KEMPLD_VERSION_GET_TYPE(version);
56
57 if (spec == 0xff) {
58 pld->info.spec_minor = 0;
59 pld->info.spec_major = 1;
60 } else {
61 pld->info.spec_minor = KEMPLD_SPEC_GET_MINOR(spec);
62 pld->info.spec_major = KEMPLD_SPEC_GET_MAJOR(spec);
63 }
64
65 if (pld->info.spec_major > 0)
66 pld->feature_mask = kempld_read16(pld, KEMPLD_FEATURE);
67 else
68 pld->feature_mask = 0;
69
70 kempld_release_mutex(pld);
71
72 return 0;
73}
74
75enum kempld_cells {
76 KEMPLD_I2C = 0,
77 KEMPLD_WDT,
78 KEMPLD_GPIO,
79 KEMPLD_UART,
80};
81
82static const struct mfd_cell kempld_devs[] = {
83 [KEMPLD_I2C] = {
84 .name = "kempld-i2c",
85 },
86 [KEMPLD_WDT] = {
87 .name = "kempld-wdt",
88 },
89 [KEMPLD_GPIO] = {
90 .name = "kempld-gpio",
91 },
92 [KEMPLD_UART] = {
93 .name = "kempld-uart",
94 },
95};
96
97#define KEMPLD_MAX_DEVS ARRAY_SIZE(kempld_devs)
98
99static int kempld_register_cells_generic(struct kempld_device_data *pld)
100{
101 struct mfd_cell devs[KEMPLD_MAX_DEVS];
102 int i = 0;
103
104 if (pld->feature_mask & KEMPLD_FEATURE_BIT_I2C)
105 devs[i++] = kempld_devs[KEMPLD_I2C];
106
107 if (pld->feature_mask & KEMPLD_FEATURE_BIT_WATCHDOG)
108 devs[i++] = kempld_devs[KEMPLD_WDT];
109
110 if (pld->feature_mask & KEMPLD_FEATURE_BIT_GPIO)
111 devs[i++] = kempld_devs[KEMPLD_GPIO];
112
113 if (pld->feature_mask & KEMPLD_FEATURE_MASK_UART)
114 devs[i++] = kempld_devs[KEMPLD_UART];
115
116 return mfd_add_devices(pld->dev, -1, devs, i, NULL, 0, NULL);
117}
118
119static struct resource kempld_ioresource = {
120 .start = KEMPLD_IOINDEX,
121 .end = KEMPLD_IODATA,
122 .flags = IORESOURCE_IO,
123};
124
125static const struct kempld_platform_data kempld_platform_data_generic = {
126 .pld_clock = KEMPLD_CLK,
127 .ioresource = &kempld_ioresource,
128 .get_hardware_mutex = kempld_get_hardware_mutex,
129 .release_hardware_mutex = kempld_release_hardware_mutex,
130 .get_info = kempld_get_info_generic,
131 .register_cells = kempld_register_cells_generic,
132};
133
134static struct platform_device *kempld_pdev;
135
136static int kempld_create_platform_device(const struct dmi_system_id *id)
137{
138 const struct kempld_platform_data *pdata = id->driver_data;
139 int ret;
140
141 kempld_pdev = platform_device_alloc("kempld", -1);
142 if (!kempld_pdev)
143 return -ENOMEM;
144
145 ret = platform_device_add_data(kempld_pdev, pdata, sizeof(*pdata));
146 if (ret)
147 goto err;
148
149 ret = platform_device_add_resources(kempld_pdev, pdata->ioresource, 1);
150 if (ret)
151 goto err;
152
153 ret = platform_device_add(kempld_pdev);
154 if (ret)
155 goto err;
156
157 return 0;
158err:
159 platform_device_put(kempld_pdev);
160 return ret;
161}
162
163/**
164 * kempld_read8 - read 8 bit register
165 * @pld: kempld_device_data structure describing the PLD
166 * @index: register index on the chip
167 *
168 * kempld_get_mutex must be called prior to calling this function.
169 */
170u8 kempld_read8(struct kempld_device_data *pld, u8 index)
171{
172 iowrite8(index, pld->io_index);
173 return ioread8(pld->io_data);
174}
175EXPORT_SYMBOL_GPL(kempld_read8);
176
177/**
178 * kempld_write8 - write 8 bit register
179 * @pld: kempld_device_data structure describing the PLD
180 * @index: register index on the chip
181 * @data: new register value
182 *
183 * kempld_get_mutex must be called prior to calling this function.
184 */
185void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data)
186{
187 iowrite8(index, pld->io_index);
188 iowrite8(data, pld->io_data);
189}
190EXPORT_SYMBOL_GPL(kempld_write8);
191
192/**
193 * kempld_read16 - read 16 bit register
194 * @pld: kempld_device_data structure describing the PLD
195 * @index: register index on the chip
196 *
197 * kempld_get_mutex must be called prior to calling this function.
198 */
199u16 kempld_read16(struct kempld_device_data *pld, u8 index)
200{
201 return kempld_read8(pld, index) | kempld_read8(pld, index + 1) << 8;
202}
203EXPORT_SYMBOL_GPL(kempld_read16);
204
205/**
206 * kempld_write16 - write 16 bit register
207 * @pld: kempld_device_data structure describing the PLD
208 * @index: register index on the chip
209 * @data: new register value
210 *
211 * kempld_get_mutex must be called prior to calling this function.
212 */
213void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data)
214{
215 kempld_write8(pld, index, (u8)data);
216 kempld_write8(pld, index + 1, (u8)(data >> 8));
217}
218EXPORT_SYMBOL_GPL(kempld_write16);
219
220/**
221 * kempld_read32 - read 32 bit register
222 * @pld: kempld_device_data structure describing the PLD
223 * @index: register index on the chip
224 *
225 * kempld_get_mutex must be called prior to calling this function.
226 */
227u32 kempld_read32(struct kempld_device_data *pld, u8 index)
228{
229 return kempld_read16(pld, index) | kempld_read16(pld, index + 2) << 16;
230}
231EXPORT_SYMBOL_GPL(kempld_read32);
232
233/**
234 * kempld_write32 - write 32 bit register
235 * @pld: kempld_device_data structure describing the PLD
236 * @index: register index on the chip
237 * @data: new register value
238 *
239 * kempld_get_mutex must be called prior to calling this function.
240 */
241void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data)
242{
243 kempld_write16(pld, index, (u16)data);
244 kempld_write16(pld, index + 2, (u16)(data >> 16));
245}
246EXPORT_SYMBOL_GPL(kempld_write32);
247
248/**
249 * kempld_get_mutex - acquire PLD mutex
250 * @pld: kempld_device_data structure describing the PLD
251 */
252void kempld_get_mutex(struct kempld_device_data *pld)
253{
254 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
255
256 mutex_lock(&pld->lock);
257 pdata->get_hardware_mutex(pld);
258}
259EXPORT_SYMBOL_GPL(kempld_get_mutex);
260
261/**
262 * kempld_release_mutex - release PLD mutex
263 * @pld: kempld_device_data structure describing the PLD
264 */
265void kempld_release_mutex(struct kempld_device_data *pld)
266{
267 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
268
269 pdata->release_hardware_mutex(pld);
270 mutex_unlock(&pld->lock);
271}
272EXPORT_SYMBOL_GPL(kempld_release_mutex);
273
274/**
275 * kempld_get_info - update device specific information
276 * @pld: kempld_device_data structure describing the PLD
277 *
278 * This function calls the configured board specific kempld_get_info_XXXX
279 * function which is responsible for gathering information about the specific
280 * hardware. The information is then stored within the pld structure.
281 */
282static int kempld_get_info(struct kempld_device_data *pld)
283{
284 int ret;
285 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
286 char major, minor;
287
288 ret = pdata->get_info(pld);
289 if (ret)
290 return ret;
291
292 /* The Kontron PLD firmware version string has the following format:
293 * Pwxy.zzzz
294 * P: Fixed
295 * w: PLD number - 1 hex digit
296 * x: Major version - 1 alphanumerical digit (0-9A-V)
297 * y: Minor version - 1 alphanumerical digit (0-9A-V)
298 * zzzz: Build number - 4 zero padded hex digits */
299
300 if (pld->info.major < 10)
301 major = pld->info.major + '0';
302 else
303 major = (pld->info.major - 10) + 'A';
304 if (pld->info.minor < 10)
305 minor = pld->info.minor + '0';
306 else
307 minor = (pld->info.minor - 10) + 'A';
308
309 ret = scnprintf(pld->info.version, sizeof(pld->info.version),
310 "P%X%c%c.%04X", pld->info.number, major, minor,
311 pld->info.buildnr);
312 if (ret < 0)
313 return ret;
314
315 return 0;
316}
317
318/*
319 * kempld_register_cells - register cell drivers
320 *
321 * This function registers cell drivers for the detected hardware by calling
322 * the configured kempld_register_cells_XXXX function which is responsible
323 * to detect and register the needed cell drivers.
324 */
325static int kempld_register_cells(struct kempld_device_data *pld)
326{
327 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
328
329 return pdata->register_cells(pld);
330}
331
332static const char *kempld_get_type_string(struct kempld_device_data *pld)
333{
334 const char *version_type;
335
336 switch (pld->info.type) {
337 case 0:
338 version_type = "release";
339 break;
340 case 1:
341 version_type = "debug";
342 break;
343 case 2:
344 version_type = "custom";
345 break;
346 default:
347 version_type = "unspecified";
348 break;
349 }
350
351 return version_type;
352}
353
354static ssize_t kempld_version_show(struct device *dev,
355 struct device_attribute *attr, char *buf)
356{
357 struct kempld_device_data *pld = dev_get_drvdata(dev);
358
359 return scnprintf(buf, PAGE_SIZE, "%s\n", pld->info.version);
360}
361
362static ssize_t kempld_specification_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, "%d.%d\n", pld->info.spec_major,
368 pld->info.spec_minor);
369}
370
371static ssize_t kempld_type_show(struct device *dev,
372 struct device_attribute *attr, char *buf)
373{
374 struct kempld_device_data *pld = dev_get_drvdata(dev);
375
376 return scnprintf(buf, PAGE_SIZE, "%s\n", kempld_get_type_string(pld));
377}
378
379static DEVICE_ATTR(pld_version, S_IRUGO, kempld_version_show, NULL);
380static DEVICE_ATTR(pld_specification, S_IRUGO, kempld_specification_show,
381 NULL);
382static DEVICE_ATTR(pld_type, S_IRUGO, kempld_type_show, NULL);
383
384static struct attribute *pld_attributes[] = {
385 &dev_attr_pld_version.attr,
386 &dev_attr_pld_specification.attr,
387 &dev_attr_pld_type.attr,
388 NULL
389};
390
391static const struct attribute_group pld_attr_group = {
392 .attrs = pld_attributes,
393};
394
395static int kempld_detect_device(struct kempld_device_data *pld)
396{
397 u8 index_reg;
398 int ret;
399
400 mutex_lock(&pld->lock);
401
402 /* Check for empty IO space */
403 index_reg = ioread8(pld->io_index);
404 if (index_reg == 0xff && ioread8(pld->io_data) == 0xff) {
405 mutex_unlock(&pld->lock);
406 return -ENODEV;
407 }
408
409 /* Release hardware mutex if acquired */
410 if (!(index_reg & KEMPLD_MUTEX_KEY)) {
411 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
412 /* PXT and COMe-cPC2 boards may require a second release */
413 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
414 }
415
416 mutex_unlock(&pld->lock);
417
418 ret = kempld_get_info(pld);
419 if (ret)
420 return ret;
421
422 dev_info(pld->dev, "Found Kontron PLD - %s (%s), spec %d.%d\n",
423 pld->info.version, kempld_get_type_string(pld),
424 pld->info.spec_major, pld->info.spec_minor);
425
426 ret = sysfs_create_group(&pld->dev->kobj, &pld_attr_group);
427 if (ret)
428 return ret;
429
430 ret = kempld_register_cells(pld);
431 if (ret)
432 sysfs_remove_group(&pld->dev->kobj, &pld_attr_group);
433
434 return ret;
435}
436
437static int kempld_probe(struct platform_device *pdev)
438{
439 const struct kempld_platform_data *pdata =
440 dev_get_platdata(&pdev->dev);
441 struct device *dev = &pdev->dev;
442 struct kempld_device_data *pld;
443 struct resource *ioport;
444
445 pld = devm_kzalloc(dev, sizeof(*pld), GFP_KERNEL);
446 if (!pld)
447 return -ENOMEM;
448
449 ioport = platform_get_resource(pdev, IORESOURCE_IO, 0);
450 if (!ioport)
451 return -EINVAL;
452
453 pld->io_base = devm_ioport_map(dev, ioport->start,
454 resource_size(ioport));
455 if (!pld->io_base)
456 return -ENOMEM;
457
458 pld->io_index = pld->io_base;
459 pld->io_data = pld->io_base + 1;
460 pld->pld_clock = pdata->pld_clock;
461 pld->dev = dev;
462
463 mutex_init(&pld->lock);
464 platform_set_drvdata(pdev, pld);
465
466 return kempld_detect_device(pld);
467}
468
469static int kempld_remove(struct platform_device *pdev)
470{
471 struct kempld_device_data *pld = platform_get_drvdata(pdev);
472 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
473
474 sysfs_remove_group(&pld->dev->kobj, &pld_attr_group);
475
476 mfd_remove_devices(&pdev->dev);
477 pdata->release_hardware_mutex(pld);
478
479 return 0;
480}
481
482static struct platform_driver kempld_driver = {
483 .driver = {
484 .name = "kempld",
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 .driver_data = (void *)&kempld_platform_data_generic,
498 .callback = kempld_create_platform_device,
499 }, {
500 .ident = "BBL6",
501 .matches = {
502 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
503 DMI_MATCH(DMI_BOARD_NAME, "COMe-bBL6"),
504 },
505 .driver_data = (void *)&kempld_platform_data_generic,
506 .callback = kempld_create_platform_device,
507 }, {
508 .ident = "BHL6",
509 .matches = {
510 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
511 DMI_MATCH(DMI_BOARD_NAME, "COMe-bHL6"),
512 },
513 .driver_data = (void *)&kempld_platform_data_generic,
514 .callback = kempld_create_platform_device,
515 }, {
516 .ident = "BKL6",
517 .matches = {
518 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
519 DMI_MATCH(DMI_BOARD_NAME, "COMe-bKL6"),
520 },
521 .driver_data = (void *)&kempld_platform_data_generic,
522 .callback = kempld_create_platform_device,
523 }, {
524 .ident = "BSL6",
525 .matches = {
526 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
527 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSL6"),
528 },
529 .driver_data = (void *)&kempld_platform_data_generic,
530 .callback = kempld_create_platform_device,
531 }, {
532 .ident = "CAL6",
533 .matches = {
534 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
535 DMI_MATCH(DMI_BOARD_NAME, "COMe-cAL"),
536 },
537 .driver_data = (void *)&kempld_platform_data_generic,
538 .callback = kempld_create_platform_device,
539 }, {
540 .ident = "CBL6",
541 .matches = {
542 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
543 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBL6"),
544 },
545 .driver_data = (void *)&kempld_platform_data_generic,
546 .callback = kempld_create_platform_device,
547 }, {
548 .ident = "CBW6",
549 .matches = {
550 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
551 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBW6"),
552 },
553 .driver_data = (void *)&kempld_platform_data_generic,
554 .callback = kempld_create_platform_device,
555 }, {
556 .ident = "CCR2",
557 .matches = {
558 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
559 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP2"),
560 },
561 .driver_data = (void *)&kempld_platform_data_generic,
562 .callback = kempld_create_platform_device,
563 }, {
564 .ident = "CCR6",
565 .matches = {
566 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
567 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP6"),
568 },
569 .driver_data = (void *)&kempld_platform_data_generic,
570 .callback = kempld_create_platform_device,
571 }, {
572 .ident = "CHL6",
573 .matches = {
574 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
575 DMI_MATCH(DMI_BOARD_NAME, "COMe-cHL6"),
576 },
577 .driver_data = (void *)&kempld_platform_data_generic,
578 .callback = kempld_create_platform_device,
579 }, {
580 .ident = "CHR2",
581 .matches = {
582 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
583 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T2"),
584 },
585 .driver_data = (void *)&kempld_platform_data_generic,
586 .callback = kempld_create_platform_device,
587 }, {
588 .ident = "CHR2",
589 .matches = {
590 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
591 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T2"),
592 },
593 .driver_data = (void *)&kempld_platform_data_generic,
594 .callback = kempld_create_platform_device,
595 }, {
596 .ident = "CHR2",
597 .matches = {
598 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
599 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC2"),
600 },
601 .driver_data = (void *)&kempld_platform_data_generic,
602 .callback = kempld_create_platform_device,
603 }, {
604 .ident = "CHR6",
605 .matches = {
606 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
607 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T6"),
608 },
609 .driver_data = (void *)&kempld_platform_data_generic,
610 .callback = kempld_create_platform_device,
611 }, {
612 .ident = "CHR6",
613 .matches = {
614 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
615 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T6"),
616 },
617 .driver_data = (void *)&kempld_platform_data_generic,
618 .callback = kempld_create_platform_device,
619 }, {
620 .ident = "CHR6",
621 .matches = {
622 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
623 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC6"),
624 },
625 .driver_data = (void *)&kempld_platform_data_generic,
626 .callback = kempld_create_platform_device,
627 }, {
628 .ident = "CKL6",
629 .matches = {
630 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
631 DMI_MATCH(DMI_BOARD_NAME, "COMe-cKL6"),
632 },
633 .driver_data = (void *)&kempld_platform_data_generic,
634 .callback = kempld_create_platform_device,
635 }, {
636 .ident = "CNTG",
637 .matches = {
638 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
639 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-PC"),
640 },
641 .driver_data = (void *)&kempld_platform_data_generic,
642 .callback = kempld_create_platform_device,
643 }, {
644 .ident = "CNTG",
645 .matches = {
646 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
647 DMI_MATCH(DMI_BOARD_NAME, "COMe-bPC2"),
648 },
649 .driver_data = (void *)&kempld_platform_data_generic,
650 .callback = kempld_create_platform_device,
651 }, {
652 .ident = "CNTX",
653 .matches = {
654 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
655 DMI_MATCH(DMI_BOARD_NAME, "PXT"),
656 },
657 .driver_data = (void *)&kempld_platform_data_generic,
658 .callback = kempld_create_platform_device,
659 }, {
660 .ident = "CSL6",
661 .matches = {
662 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
663 DMI_MATCH(DMI_BOARD_NAME, "COMe-cSL6"),
664 },
665 .driver_data = (void *)&kempld_platform_data_generic,
666 .callback = kempld_create_platform_device,
667 }, {
668 .ident = "CVV6",
669 .matches = {
670 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
671 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBT"),
672 },
673 .driver_data = (void *)&kempld_platform_data_generic,
674 .callback = kempld_create_platform_device,
675 }, {
676 .ident = "FRI2",
677 .matches = {
678 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
679 DMI_MATCH(DMI_BIOS_VERSION, "FRI2"),
680 },
681 .driver_data = (void *)&kempld_platform_data_generic,
682 .callback = kempld_create_platform_device,
683 }, {
684 .ident = "FRI2",
685 .matches = {
686 DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"),
687 },
688 .driver_data = (void *)&kempld_platform_data_generic,
689 .callback = kempld_create_platform_device,
690 }, {
691 .ident = "MAL1",
692 .matches = {
693 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
694 DMI_MATCH(DMI_BOARD_NAME, "COMe-mAL10"),
695 },
696 .driver_data = (void *)&kempld_platform_data_generic,
697 .callback = kempld_create_platform_device,
698 }, {
699 .ident = "MBR1",
700 .matches = {
701 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
702 DMI_MATCH(DMI_BOARD_NAME, "ETX-OH"),
703 },
704 .driver_data = (void *)&kempld_platform_data_generic,
705 .callback = kempld_create_platform_device,
706 }, {
707 .ident = "MVV1",
708 .matches = {
709 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
710 DMI_MATCH(DMI_BOARD_NAME, "COMe-mBT"),
711 },
712 .driver_data = (void *)&kempld_platform_data_generic,
713 .callback = kempld_create_platform_device,
714 }, {
715 .ident = "NTC1",
716 .matches = {
717 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
718 DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"),
719 },
720 .driver_data = (void *)&kempld_platform_data_generic,
721 .callback = kempld_create_platform_device,
722 }, {
723 .ident = "NTC1",
724 .matches = {
725 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
726 DMI_MATCH(DMI_BOARD_NAME, "nETXe-TT"),
727 },
728 .driver_data = (void *)&kempld_platform_data_generic,
729 .callback = kempld_create_platform_device,
730 }, {
731 .ident = "NTC1",
732 .matches = {
733 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
734 DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"),
735 },
736 .driver_data = (void *)&kempld_platform_data_generic,
737 .callback = kempld_create_platform_device,
738 }, {
739 .ident = "NUP1",
740 .matches = {
741 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
742 DMI_MATCH(DMI_BOARD_NAME, "COMe-mCT"),
743 },
744 .driver_data = (void *)&kempld_platform_data_generic,
745 .callback = kempld_create_platform_device,
746 }, {
747 .ident = "UNP1",
748 .matches = {
749 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
750 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-DC"),
751 },
752 .driver_data = (void *)&kempld_platform_data_generic,
753 .callback = kempld_create_platform_device,
754 }, {
755 .ident = "UNP1",
756 .matches = {
757 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
758 DMI_MATCH(DMI_BOARD_NAME, "COMe-cDC2"),
759 },
760 .driver_data = (void *)&kempld_platform_data_generic,
761 .callback = kempld_create_platform_device,
762 }, {
763 .ident = "UNTG",
764 .matches = {
765 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
766 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-PC"),
767 },
768 .driver_data = (void *)&kempld_platform_data_generic,
769 .callback = kempld_create_platform_device,
770 }, {
771 .ident = "UNTG",
772 .matches = {
773 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
774 DMI_MATCH(DMI_BOARD_NAME, "COMe-cPC2"),
775 },
776 .driver_data = (void *)&kempld_platform_data_generic,
777 .callback = kempld_create_platform_device,
778 }, {
779 .ident = "UUP6",
780 .matches = {
781 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
782 DMI_MATCH(DMI_BOARD_NAME, "COMe-cCT6"),
783 },
784 .driver_data = (void *)&kempld_platform_data_generic,
785 .callback = kempld_create_platform_device,
786 },
787 {
788 .ident = "UTH6",
789 .matches = {
790 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
791 DMI_MATCH(DMI_BOARD_NAME, "COMe-cTH6"),
792 },
793 .driver_data = (void *)&kempld_platform_data_generic,
794 .callback = kempld_create_platform_device,
795 },
796 {}
797};
798MODULE_DEVICE_TABLE(dmi, kempld_dmi_table);
799
800static int __init kempld_init(void)
801{
802 const struct dmi_system_id *id;
803
804 if (force_device_id[0]) {
805 for (id = kempld_dmi_table;
806 id->matches[0].slot != DMI_NONE; id++)
807 if (strstr(id->ident, force_device_id))
808 if (id->callback && !id->callback(id))
809 break;
810 if (id->matches[0].slot == DMI_NONE)
811 return -ENODEV;
812 } else {
813 if (!dmi_check_system(kempld_dmi_table))
814 return -ENODEV;
815 }
816
817 return platform_driver_register(&kempld_driver);
818}
819
820static void __exit kempld_exit(void)
821{
822 if (kempld_pdev)
823 platform_device_unregister(kempld_pdev);
824
825 platform_driver_unregister(&kempld_driver);
826}
827
828module_init(kempld_init);
829module_exit(kempld_exit);
830
831MODULE_DESCRIPTION("KEM PLD Core Driver");
832MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>");
833MODULE_LICENSE("GPL");
834MODULE_ALIAS("platform:kempld-core");