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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#include <linux/acpi.h>
17
18#define MAX_ID_LEN 4
19static char force_device_id[MAX_ID_LEN + 1] = "";
20module_param_string(force_device_id, force_device_id,
21 sizeof(force_device_id), 0);
22MODULE_PARM_DESC(force_device_id, "Override detected product");
23
24/*
25 * Get hardware mutex to block firmware from accessing the pld.
26 * It is possible for the firmware may hold the mutex for an extended length of
27 * time. This function will block until access has been granted.
28 */
29static void kempld_get_hardware_mutex(struct kempld_device_data *pld)
30{
31 /* The mutex bit will read 1 until access has been granted */
32 while (ioread8(pld->io_index) & KEMPLD_MUTEX_KEY)
33 usleep_range(1000, 3000);
34}
35
36static void kempld_release_hardware_mutex(struct kempld_device_data *pld)
37{
38 /* The harware mutex is released when 1 is written to the mutex bit. */
39 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
40}
41
42static int kempld_get_info_generic(struct kempld_device_data *pld)
43{
44 u16 version;
45 u8 spec;
46
47 kempld_get_mutex(pld);
48
49 version = kempld_read16(pld, KEMPLD_VERSION);
50 spec = kempld_read8(pld, KEMPLD_SPEC);
51 pld->info.buildnr = kempld_read16(pld, KEMPLD_BUILDNR);
52
53 pld->info.minor = KEMPLD_VERSION_GET_MINOR(version);
54 pld->info.major = KEMPLD_VERSION_GET_MAJOR(version);
55 pld->info.number = KEMPLD_VERSION_GET_NUMBER(version);
56 pld->info.type = KEMPLD_VERSION_GET_TYPE(version);
57
58 if (spec == 0xff) {
59 pld->info.spec_minor = 0;
60 pld->info.spec_major = 1;
61 } else {
62 pld->info.spec_minor = KEMPLD_SPEC_GET_MINOR(spec);
63 pld->info.spec_major = KEMPLD_SPEC_GET_MAJOR(spec);
64 }
65
66 if (pld->info.spec_major > 0)
67 pld->feature_mask = kempld_read16(pld, KEMPLD_FEATURE);
68 else
69 pld->feature_mask = 0;
70
71 kempld_release_mutex(pld);
72
73 return 0;
74}
75
76enum kempld_cells {
77 KEMPLD_I2C = 0,
78 KEMPLD_WDT,
79 KEMPLD_GPIO,
80 KEMPLD_UART,
81};
82
83static const char *kempld_dev_names[] = {
84 [KEMPLD_I2C] = "kempld-i2c",
85 [KEMPLD_WDT] = "kempld-wdt",
86 [KEMPLD_GPIO] = "kempld-gpio",
87 [KEMPLD_UART] = "kempld-uart",
88};
89
90#define KEMPLD_MAX_DEVS ARRAY_SIZE(kempld_dev_names)
91
92static int kempld_register_cells_generic(struct kempld_device_data *pld)
93{
94 struct mfd_cell devs[KEMPLD_MAX_DEVS] = {};
95 int i = 0;
96
97 if (pld->feature_mask & KEMPLD_FEATURE_BIT_I2C)
98 devs[i++].name = kempld_dev_names[KEMPLD_I2C];
99
100 if (pld->feature_mask & KEMPLD_FEATURE_BIT_WATCHDOG)
101 devs[i++].name = kempld_dev_names[KEMPLD_WDT];
102
103 if (pld->feature_mask & KEMPLD_FEATURE_BIT_GPIO)
104 devs[i++].name = kempld_dev_names[KEMPLD_GPIO];
105
106 if (pld->feature_mask & KEMPLD_FEATURE_MASK_UART)
107 devs[i++].name = kempld_dev_names[KEMPLD_UART];
108
109 return mfd_add_devices(pld->dev, -1, devs, i, NULL, 0, NULL);
110}
111
112static struct resource kempld_ioresource = {
113 .start = KEMPLD_IOINDEX,
114 .end = KEMPLD_IODATA,
115 .flags = IORESOURCE_IO,
116};
117
118static const struct kempld_platform_data kempld_platform_data_generic = {
119 .pld_clock = KEMPLD_CLK,
120 .ioresource = &kempld_ioresource,
121 .get_hardware_mutex = kempld_get_hardware_mutex,
122 .release_hardware_mutex = kempld_release_hardware_mutex,
123 .get_info = kempld_get_info_generic,
124 .register_cells = kempld_register_cells_generic,
125};
126
127static struct platform_device *kempld_pdev;
128
129static int kempld_create_platform_device(const struct dmi_system_id *id)
130{
131 const struct kempld_platform_data *pdata = id->driver_data;
132 int ret;
133
134 kempld_pdev = platform_device_alloc("kempld", -1);
135 if (!kempld_pdev)
136 return -ENOMEM;
137
138 ret = platform_device_add_data(kempld_pdev, pdata, sizeof(*pdata));
139 if (ret)
140 goto err;
141
142 ret = platform_device_add_resources(kempld_pdev, pdata->ioresource, 1);
143 if (ret)
144 goto err;
145
146 ret = platform_device_add(kempld_pdev);
147 if (ret)
148 goto err;
149
150 return 0;
151err:
152 platform_device_put(kempld_pdev);
153 return ret;
154}
155
156/**
157 * kempld_read8 - read 8 bit register
158 * @pld: kempld_device_data structure describing the PLD
159 * @index: register index on the chip
160 *
161 * kempld_get_mutex must be called prior to calling this function.
162 */
163u8 kempld_read8(struct kempld_device_data *pld, u8 index)
164{
165 iowrite8(index, pld->io_index);
166 return ioread8(pld->io_data);
167}
168EXPORT_SYMBOL_GPL(kempld_read8);
169
170/**
171 * kempld_write8 - write 8 bit register
172 * @pld: kempld_device_data structure describing the PLD
173 * @index: register index on the chip
174 * @data: new register value
175 *
176 * kempld_get_mutex must be called prior to calling this function.
177 */
178void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data)
179{
180 iowrite8(index, pld->io_index);
181 iowrite8(data, pld->io_data);
182}
183EXPORT_SYMBOL_GPL(kempld_write8);
184
185/**
186 * kempld_read16 - read 16 bit register
187 * @pld: kempld_device_data structure describing the PLD
188 * @index: register index on the chip
189 *
190 * kempld_get_mutex must be called prior to calling this function.
191 */
192u16 kempld_read16(struct kempld_device_data *pld, u8 index)
193{
194 return kempld_read8(pld, index) | kempld_read8(pld, index + 1) << 8;
195}
196EXPORT_SYMBOL_GPL(kempld_read16);
197
198/**
199 * kempld_write16 - write 16 bit register
200 * @pld: kempld_device_data structure describing the PLD
201 * @index: register index on the chip
202 * @data: new register value
203 *
204 * kempld_get_mutex must be called prior to calling this function.
205 */
206void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data)
207{
208 kempld_write8(pld, index, (u8)data);
209 kempld_write8(pld, index + 1, (u8)(data >> 8));
210}
211EXPORT_SYMBOL_GPL(kempld_write16);
212
213/**
214 * kempld_read32 - read 32 bit register
215 * @pld: kempld_device_data structure describing the PLD
216 * @index: register index on the chip
217 *
218 * kempld_get_mutex must be called prior to calling this function.
219 */
220u32 kempld_read32(struct kempld_device_data *pld, u8 index)
221{
222 return kempld_read16(pld, index) | kempld_read16(pld, index + 2) << 16;
223}
224EXPORT_SYMBOL_GPL(kempld_read32);
225
226/**
227 * kempld_write32 - write 32 bit register
228 * @pld: kempld_device_data structure describing the PLD
229 * @index: register index on the chip
230 * @data: new register value
231 *
232 * kempld_get_mutex must be called prior to calling this function.
233 */
234void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data)
235{
236 kempld_write16(pld, index, (u16)data);
237 kempld_write16(pld, index + 2, (u16)(data >> 16));
238}
239EXPORT_SYMBOL_GPL(kempld_write32);
240
241/**
242 * kempld_get_mutex - acquire PLD mutex
243 * @pld: kempld_device_data structure describing the PLD
244 */
245void kempld_get_mutex(struct kempld_device_data *pld)
246{
247 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
248
249 mutex_lock(&pld->lock);
250 pdata->get_hardware_mutex(pld);
251}
252EXPORT_SYMBOL_GPL(kempld_get_mutex);
253
254/**
255 * kempld_release_mutex - release PLD mutex
256 * @pld: kempld_device_data structure describing the PLD
257 */
258void kempld_release_mutex(struct kempld_device_data *pld)
259{
260 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
261
262 pdata->release_hardware_mutex(pld);
263 mutex_unlock(&pld->lock);
264}
265EXPORT_SYMBOL_GPL(kempld_release_mutex);
266
267/**
268 * kempld_get_info - update device specific information
269 * @pld: kempld_device_data structure describing the PLD
270 *
271 * This function calls the configured board specific kempld_get_info_XXXX
272 * function which is responsible for gathering information about the specific
273 * hardware. The information is then stored within the pld structure.
274 */
275static int kempld_get_info(struct kempld_device_data *pld)
276{
277 int ret;
278 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
279 char major, minor;
280
281 ret = pdata->get_info(pld);
282 if (ret)
283 return ret;
284
285 /* The Kontron PLD firmware version string has the following format:
286 * Pwxy.zzzz
287 * P: Fixed
288 * w: PLD number - 1 hex digit
289 * x: Major version - 1 alphanumerical digit (0-9A-V)
290 * y: Minor version - 1 alphanumerical digit (0-9A-V)
291 * zzzz: Build number - 4 zero padded hex digits */
292
293 if (pld->info.major < 10)
294 major = pld->info.major + '0';
295 else
296 major = (pld->info.major - 10) + 'A';
297 if (pld->info.minor < 10)
298 minor = pld->info.minor + '0';
299 else
300 minor = (pld->info.minor - 10) + 'A';
301
302 ret = scnprintf(pld->info.version, sizeof(pld->info.version),
303 "P%X%c%c.%04X", pld->info.number, major, minor,
304 pld->info.buildnr);
305 if (ret < 0)
306 return ret;
307
308 return 0;
309}
310
311/*
312 * kempld_register_cells - register cell drivers
313 *
314 * This function registers cell drivers for the detected hardware by calling
315 * the configured kempld_register_cells_XXXX function which is responsible
316 * to detect and register the needed cell drivers.
317 */
318static int kempld_register_cells(struct kempld_device_data *pld)
319{
320 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
321
322 return pdata->register_cells(pld);
323}
324
325static const char *kempld_get_type_string(struct kempld_device_data *pld)
326{
327 const char *version_type;
328
329 switch (pld->info.type) {
330 case 0:
331 version_type = "release";
332 break;
333 case 1:
334 version_type = "debug";
335 break;
336 case 2:
337 version_type = "custom";
338 break;
339 default:
340 version_type = "unspecified";
341 break;
342 }
343
344 return version_type;
345}
346
347static ssize_t pld_version_show(struct device *dev,
348 struct device_attribute *attr, char *buf)
349{
350 struct kempld_device_data *pld = dev_get_drvdata(dev);
351
352 return sysfs_emit(buf, "%s\n", pld->info.version);
353}
354
355static ssize_t pld_specification_show(struct device *dev,
356 struct device_attribute *attr, char *buf)
357{
358 struct kempld_device_data *pld = dev_get_drvdata(dev);
359
360 return sysfs_emit(buf, "%d.%d\n", pld->info.spec_major, pld->info.spec_minor);
361}
362
363static ssize_t pld_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 sysfs_emit(buf, "%s\n", kempld_get_type_string(pld));
369}
370
371static DEVICE_ATTR_RO(pld_version);
372static DEVICE_ATTR_RO(pld_specification);
373static DEVICE_ATTR_RO(pld_type);
374
375static struct attribute *pld_attributes[] = {
376 &dev_attr_pld_version.attr,
377 &dev_attr_pld_specification.attr,
378 &dev_attr_pld_type.attr,
379 NULL
380};
381
382static const struct attribute_group pld_attr_group = {
383 .attrs = pld_attributes,
384};
385
386static int kempld_detect_device(struct kempld_device_data *pld)
387{
388 u8 index_reg;
389 int ret;
390
391 mutex_lock(&pld->lock);
392
393 /* Check for empty IO space */
394 index_reg = ioread8(pld->io_index);
395 if (index_reg == 0xff && ioread8(pld->io_data) == 0xff) {
396 mutex_unlock(&pld->lock);
397 return -ENODEV;
398 }
399
400 /* Release hardware mutex if acquired */
401 if (!(index_reg & KEMPLD_MUTEX_KEY)) {
402 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
403 /* PXT and COMe-cPC2 boards may require a second release */
404 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
405 }
406
407 mutex_unlock(&pld->lock);
408
409 ret = kempld_get_info(pld);
410 if (ret)
411 return ret;
412
413 dev_info(pld->dev, "Found Kontron PLD - %s (%s), spec %d.%d\n",
414 pld->info.version, kempld_get_type_string(pld),
415 pld->info.spec_major, pld->info.spec_minor);
416
417 ret = sysfs_create_group(&pld->dev->kobj, &pld_attr_group);
418 if (ret)
419 return ret;
420
421 ret = kempld_register_cells(pld);
422 if (ret)
423 sysfs_remove_group(&pld->dev->kobj, &pld_attr_group);
424
425 return ret;
426}
427
428#ifdef CONFIG_ACPI
429static int kempld_get_acpi_data(struct platform_device *pdev)
430{
431 struct list_head resource_list;
432 struct resource *resources;
433 struct resource_entry *rentry;
434 struct device *dev = &pdev->dev;
435 struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
436 const struct kempld_platform_data *pdata;
437 int ret;
438 int count;
439
440 pdata = acpi_device_get_match_data(dev);
441 ret = platform_device_add_data(pdev, pdata,
442 sizeof(struct kempld_platform_data));
443 if (ret)
444 return ret;
445
446 INIT_LIST_HEAD(&resource_list);
447 ret = acpi_dev_get_resources(acpi_dev, &resource_list, NULL, NULL);
448 if (ret < 0)
449 goto out;
450
451 count = ret;
452
453 if (count == 0) {
454 ret = platform_device_add_resources(pdev, pdata->ioresource, 1);
455 goto out;
456 }
457
458 resources = devm_kcalloc(&acpi_dev->dev, count, sizeof(*resources),
459 GFP_KERNEL);
460 if (!resources) {
461 ret = -ENOMEM;
462 goto out;
463 }
464
465 count = 0;
466 list_for_each_entry(rentry, &resource_list, node) {
467 memcpy(&resources[count], rentry->res,
468 sizeof(*resources));
469 count++;
470 }
471 ret = platform_device_add_resources(pdev, resources, count);
472
473out:
474 acpi_dev_free_resource_list(&resource_list);
475
476 return ret;
477}
478#else
479static int kempld_get_acpi_data(struct platform_device *pdev)
480{
481 return -ENODEV;
482}
483#endif /* CONFIG_ACPI */
484
485static int kempld_probe(struct platform_device *pdev)
486{
487 const struct kempld_platform_data *pdata;
488 struct device *dev = &pdev->dev;
489 struct kempld_device_data *pld;
490 struct resource *ioport;
491 int ret;
492
493 if (kempld_pdev == NULL) {
494 /*
495 * No kempld_pdev device has been registered in kempld_init,
496 * so we seem to be probing an ACPI platform device.
497 */
498 ret = kempld_get_acpi_data(pdev);
499 if (ret)
500 return ret;
501 } else if (kempld_pdev != pdev) {
502 /*
503 * The platform device we are probing is not the one we
504 * registered in kempld_init using the DMI table, so this one
505 * comes from ACPI.
506 * As we can only probe one - abort here and use the DMI
507 * based one instead.
508 */
509 dev_notice(dev, "platform device exists - not using ACPI\n");
510 return -ENODEV;
511 }
512 pdata = dev_get_platdata(dev);
513
514 pld = devm_kzalloc(dev, sizeof(*pld), GFP_KERNEL);
515 if (!pld)
516 return -ENOMEM;
517
518 ioport = platform_get_resource(pdev, IORESOURCE_IO, 0);
519 if (!ioport)
520 return -EINVAL;
521
522 pld->io_base = devm_ioport_map(dev, ioport->start,
523 resource_size(ioport));
524 if (!pld->io_base)
525 return -ENOMEM;
526
527 pld->io_index = pld->io_base;
528 pld->io_data = pld->io_base + 1;
529 pld->pld_clock = pdata->pld_clock;
530 pld->dev = dev;
531
532 mutex_init(&pld->lock);
533 platform_set_drvdata(pdev, pld);
534
535 return kempld_detect_device(pld);
536}
537
538static void kempld_remove(struct platform_device *pdev)
539{
540 struct kempld_device_data *pld = platform_get_drvdata(pdev);
541 const struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
542
543 sysfs_remove_group(&pld->dev->kobj, &pld_attr_group);
544
545 mfd_remove_devices(&pdev->dev);
546 pdata->release_hardware_mutex(pld);
547}
548
549#ifdef CONFIG_ACPI
550static const struct acpi_device_id kempld_acpi_table[] = {
551 { "KEM0000", (kernel_ulong_t)&kempld_platform_data_generic },
552 { "KEM0001", (kernel_ulong_t)&kempld_platform_data_generic },
553 {}
554};
555MODULE_DEVICE_TABLE(acpi, kempld_acpi_table);
556#endif
557
558static struct platform_driver kempld_driver = {
559 .driver = {
560 .name = "kempld",
561 .acpi_match_table = ACPI_PTR(kempld_acpi_table),
562 },
563 .probe = kempld_probe,
564 .remove_new = kempld_remove,
565};
566
567static const struct dmi_system_id kempld_dmi_table[] __initconst = {
568 {
569 .ident = "BBD6",
570 .matches = {
571 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
572 DMI_MATCH(DMI_BOARD_NAME, "COMe-bBD"),
573 },
574 .driver_data = (void *)&kempld_platform_data_generic,
575 .callback = kempld_create_platform_device,
576 }, {
577 .ident = "BBL6",
578 .matches = {
579 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
580 DMI_MATCH(DMI_BOARD_NAME, "COMe-bBL6"),
581 },
582 .driver_data = (void *)&kempld_platform_data_generic,
583 .callback = kempld_create_platform_device,
584 }, {
585 .ident = "BDV7",
586 .matches = {
587 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
588 DMI_MATCH(DMI_BOARD_NAME, "COMe-bDV7"),
589 },
590 .driver_data = (void *)&kempld_platform_data_generic,
591 .callback = kempld_create_platform_device,
592 }, {
593 .ident = "BHL6",
594 .matches = {
595 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
596 DMI_MATCH(DMI_BOARD_NAME, "COMe-bHL6"),
597 },
598 .driver_data = (void *)&kempld_platform_data_generic,
599 .callback = kempld_create_platform_device,
600 }, {
601 .ident = "BKL6",
602 .matches = {
603 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
604 DMI_MATCH(DMI_BOARD_NAME, "COMe-bKL6"),
605 },
606 .driver_data = (void *)&kempld_platform_data_generic,
607 .callback = kempld_create_platform_device,
608 }, {
609 .ident = "BSL6",
610 .matches = {
611 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
612 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSL6"),
613 },
614 .driver_data = (void *)&kempld_platform_data_generic,
615 .callback = kempld_create_platform_device,
616 }, {
617 .ident = "CAL6",
618 .matches = {
619 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
620 DMI_MATCH(DMI_BOARD_NAME, "COMe-cAL"),
621 },
622 .driver_data = (void *)&kempld_platform_data_generic,
623 .callback = kempld_create_platform_device,
624 }, {
625 .ident = "CBL6",
626 .matches = {
627 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
628 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBL6"),
629 },
630 .driver_data = (void *)&kempld_platform_data_generic,
631 .callback = kempld_create_platform_device,
632 }, {
633 .ident = "CBW6",
634 .matches = {
635 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
636 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBW6"),
637 },
638 .driver_data = (void *)&kempld_platform_data_generic,
639 .callback = kempld_create_platform_device,
640 }, {
641 .ident = "CCR2",
642 .matches = {
643 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
644 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP2"),
645 },
646 .driver_data = (void *)&kempld_platform_data_generic,
647 .callback = kempld_create_platform_device,
648 }, {
649 .ident = "CCR6",
650 .matches = {
651 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
652 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP6"),
653 },
654 .driver_data = (void *)&kempld_platform_data_generic,
655 .callback = kempld_create_platform_device,
656 }, {
657 .ident = "CDV7",
658 .matches = {
659 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
660 DMI_MATCH(DMI_BOARD_NAME, "COMe-cDV7"),
661 },
662 .driver_data = (void *)&kempld_platform_data_generic,
663 .callback = kempld_create_platform_device,
664 }, {
665 .ident = "CHL6",
666 .matches = {
667 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
668 DMI_MATCH(DMI_BOARD_NAME, "COMe-cHL6"),
669 },
670 .driver_data = (void *)&kempld_platform_data_generic,
671 .callback = kempld_create_platform_device,
672 }, {
673 .ident = "CHR2",
674 .matches = {
675 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
676 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T2"),
677 },
678 .driver_data = (void *)&kempld_platform_data_generic,
679 .callback = kempld_create_platform_device,
680 }, {
681 .ident = "CHR2",
682 .matches = {
683 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
684 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T2"),
685 },
686 .driver_data = (void *)&kempld_platform_data_generic,
687 .callback = kempld_create_platform_device,
688 }, {
689 .ident = "CHR2",
690 .matches = {
691 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
692 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC2"),
693 },
694 .driver_data = (void *)&kempld_platform_data_generic,
695 .callback = kempld_create_platform_device,
696 }, {
697 .ident = "CHR6",
698 .matches = {
699 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
700 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T6"),
701 },
702 .driver_data = (void *)&kempld_platform_data_generic,
703 .callback = kempld_create_platform_device,
704 }, {
705 .ident = "CHR6",
706 .matches = {
707 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
708 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T6"),
709 },
710 .driver_data = (void *)&kempld_platform_data_generic,
711 .callback = kempld_create_platform_device,
712 }, {
713 .ident = "CHR6",
714 .matches = {
715 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
716 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC6"),
717 },
718 .driver_data = (void *)&kempld_platform_data_generic,
719 .callback = kempld_create_platform_device,
720 }, {
721 .ident = "CKL6",
722 .matches = {
723 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
724 DMI_MATCH(DMI_BOARD_NAME, "COMe-cKL6"),
725 },
726 .driver_data = (void *)&kempld_platform_data_generic,
727 .callback = kempld_create_platform_device,
728 }, {
729 .ident = "CNTG",
730 .matches = {
731 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
732 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-PC"),
733 },
734 .driver_data = (void *)&kempld_platform_data_generic,
735 .callback = kempld_create_platform_device,
736 }, {
737 .ident = "CNTG",
738 .matches = {
739 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
740 DMI_MATCH(DMI_BOARD_NAME, "COMe-bPC2"),
741 },
742 .driver_data = (void *)&kempld_platform_data_generic,
743 .callback = kempld_create_platform_device,
744 }, {
745 .ident = "CNTX",
746 .matches = {
747 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
748 DMI_MATCH(DMI_BOARD_NAME, "PXT"),
749 },
750 .driver_data = (void *)&kempld_platform_data_generic,
751 .callback = kempld_create_platform_device,
752 }, {
753 .ident = "CSL6",
754 .matches = {
755 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
756 DMI_MATCH(DMI_BOARD_NAME, "COMe-cSL6"),
757 },
758 .driver_data = (void *)&kempld_platform_data_generic,
759 .callback = kempld_create_platform_device,
760 }, {
761 .ident = "CVV6",
762 .matches = {
763 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
764 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBT"),
765 },
766 .driver_data = (void *)&kempld_platform_data_generic,
767 .callback = kempld_create_platform_device,
768 }, {
769 .ident = "FRI2",
770 .matches = {
771 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
772 DMI_MATCH(DMI_BIOS_VERSION, "FRI2"),
773 },
774 .driver_data = (void *)&kempld_platform_data_generic,
775 .callback = kempld_create_platform_device,
776 }, {
777 .ident = "FRI2",
778 .matches = {
779 DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"),
780 },
781 .driver_data = (void *)&kempld_platform_data_generic,
782 .callback = kempld_create_platform_device,
783 }, {
784 .ident = "A203",
785 .matches = {
786 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
787 DMI_MATCH(DMI_BOARD_NAME, "KBox A-203"),
788 },
789 .driver_data = (void *)&kempld_platform_data_generic,
790 .callback = kempld_create_platform_device,
791 }, {
792 .ident = "M4A1",
793 .matches = {
794 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
795 DMI_MATCH(DMI_BOARD_NAME, "COMe-m4AL"),
796 },
797 .driver_data = (void *)&kempld_platform_data_generic,
798 .callback = kempld_create_platform_device,
799 }, {
800 .ident = "MAL1",
801 .matches = {
802 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
803 DMI_MATCH(DMI_BOARD_NAME, "COMe-mAL10"),
804 },
805 .driver_data = (void *)&kempld_platform_data_generic,
806 .callback = kempld_create_platform_device,
807 }, {
808 .ident = "MAPL",
809 .matches = {
810 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
811 DMI_MATCH(DMI_BOARD_NAME, "mITX-APL"),
812 },
813 .driver_data = (void *)&kempld_platform_data_generic,
814 .callback = kempld_create_platform_device,
815 }, {
816 .ident = "MBR1",
817 .matches = {
818 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
819 DMI_MATCH(DMI_BOARD_NAME, "ETX-OH"),
820 },
821 .driver_data = (void *)&kempld_platform_data_generic,
822 .callback = kempld_create_platform_device,
823 }, {
824 .ident = "MVV1",
825 .matches = {
826 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
827 DMI_MATCH(DMI_BOARD_NAME, "COMe-mBT"),
828 },
829 .driver_data = (void *)&kempld_platform_data_generic,
830 .callback = kempld_create_platform_device,
831 }, {
832 .ident = "NTC1",
833 .matches = {
834 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
835 DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"),
836 },
837 .driver_data = (void *)&kempld_platform_data_generic,
838 .callback = kempld_create_platform_device,
839 }, {
840 .ident = "NTC1",
841 .matches = {
842 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
843 DMI_MATCH(DMI_BOARD_NAME, "nETXe-TT"),
844 },
845 .driver_data = (void *)&kempld_platform_data_generic,
846 .callback = kempld_create_platform_device,
847 }, {
848 .ident = "NTC1",
849 .matches = {
850 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
851 DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"),
852 },
853 .driver_data = (void *)&kempld_platform_data_generic,
854 .callback = kempld_create_platform_device,
855 }, {
856 .ident = "NUP1",
857 .matches = {
858 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
859 DMI_MATCH(DMI_BOARD_NAME, "COMe-mCT"),
860 },
861 .driver_data = (void *)&kempld_platform_data_generic,
862 .callback = kempld_create_platform_device,
863 }, {
864 .ident = "PAPL",
865 .matches = {
866 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
867 DMI_MATCH(DMI_BOARD_NAME, "pITX-APL"),
868 },
869 .driver_data = (void *)&kempld_platform_data_generic,
870 .callback = kempld_create_platform_device,
871 }, {
872 .ident = "SXAL",
873 .matches = {
874 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
875 DMI_MATCH(DMI_BOARD_NAME, "SMARC-sXAL"),
876 },
877 .driver_data = (void *)&kempld_platform_data_generic,
878 .callback = kempld_create_platform_device,
879 }, {
880 .ident = "SXAL4",
881 .matches = {
882 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
883 DMI_MATCH(DMI_BOARD_NAME, "SMARC-sXA4"),
884 },
885 .driver_data = (void *)&kempld_platform_data_generic,
886 .callback = kempld_create_platform_device,
887 }, {
888 .ident = "UNP1",
889 .matches = {
890 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
891 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-DC"),
892 },
893 .driver_data = (void *)&kempld_platform_data_generic,
894 .callback = kempld_create_platform_device,
895 }, {
896 .ident = "UNP1",
897 .matches = {
898 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
899 DMI_MATCH(DMI_BOARD_NAME, "COMe-cDC2"),
900 },
901 .driver_data = (void *)&kempld_platform_data_generic,
902 .callback = kempld_create_platform_device,
903 }, {
904 .ident = "UNTG",
905 .matches = {
906 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
907 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-PC"),
908 },
909 .driver_data = (void *)&kempld_platform_data_generic,
910 .callback = kempld_create_platform_device,
911 }, {
912 .ident = "UNTG",
913 .matches = {
914 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
915 DMI_MATCH(DMI_BOARD_NAME, "COMe-cPC2"),
916 },
917 .driver_data = (void *)&kempld_platform_data_generic,
918 .callback = kempld_create_platform_device,
919 }, {
920 .ident = "UUP6",
921 .matches = {
922 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
923 DMI_MATCH(DMI_BOARD_NAME, "COMe-cCT6"),
924 },
925 .driver_data = (void *)&kempld_platform_data_generic,
926 .callback = kempld_create_platform_device,
927 }, {
928 .ident = "UTH6",
929 .matches = {
930 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
931 DMI_MATCH(DMI_BOARD_NAME, "COMe-cTH6"),
932 },
933 .driver_data = (void *)&kempld_platform_data_generic,
934 .callback = kempld_create_platform_device,
935 }, {
936 .ident = "Q7AL",
937 .matches = {
938 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
939 DMI_MATCH(DMI_BOARD_NAME, "Qseven-Q7AL"),
940 },
941 .driver_data = (void *)&kempld_platform_data_generic,
942 .callback = kempld_create_platform_device,
943 },
944 {}
945};
946MODULE_DEVICE_TABLE(dmi, kempld_dmi_table);
947
948static int __init kempld_init(void)
949{
950 const struct dmi_system_id *id;
951
952 if (force_device_id[0]) {
953 for (id = kempld_dmi_table;
954 id->matches[0].slot != DMI_NONE; id++)
955 if (strstr(id->ident, force_device_id))
956 if (id->callback && !id->callback(id))
957 break;
958 if (id->matches[0].slot == DMI_NONE)
959 return -ENODEV;
960 } else {
961 dmi_check_system(kempld_dmi_table);
962 }
963
964 return platform_driver_register(&kempld_driver);
965}
966
967static void __exit kempld_exit(void)
968{
969 if (kempld_pdev)
970 platform_device_unregister(kempld_pdev);
971
972 platform_driver_unregister(&kempld_driver);
973}
974
975module_init(kempld_init);
976module_exit(kempld_exit);
977
978MODULE_DESCRIPTION("KEM PLD Core Driver");
979MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>");
980MODULE_LICENSE("GPL");
981MODULE_ALIAS("platform:kempld-core");
1/*
2 * Kontron PLD MFD core driver
3 *
4 * Copyright (c) 2010-2013 Kontron Europe GmbH
5 * Author: Michael Brunner <michael.brunner@kontron.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License 2 as published
9 * by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17#include <linux/platform_device.h>
18#include <linux/mfd/core.h>
19#include <linux/mfd/kempld.h>
20#include <linux/module.h>
21#include <linux/dmi.h>
22#include <linux/io.h>
23#include <linux/delay.h>
24
25#define MAX_ID_LEN 4
26static char force_device_id[MAX_ID_LEN + 1] = "";
27module_param_string(force_device_id, force_device_id, sizeof(force_device_id), 0);
28MODULE_PARM_DESC(force_device_id, "Override detected product");
29
30/*
31 * Get hardware mutex to block firmware from accessing the pld.
32 * It is possible for the firmware may hold the mutex for an extended length of
33 * time. This function will block until access has been granted.
34 */
35static void kempld_get_hardware_mutex(struct kempld_device_data *pld)
36{
37 /* The mutex bit will read 1 until access has been granted */
38 while (ioread8(pld->io_index) & KEMPLD_MUTEX_KEY)
39 msleep(1);
40}
41
42static void kempld_release_hardware_mutex(struct kempld_device_data *pld)
43{
44 /* The harware mutex is released when 1 is written to the mutex bit. */
45 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
46}
47
48static int kempld_get_info_generic(struct kempld_device_data *pld)
49{
50 u16 version;
51 u8 spec;
52
53 kempld_get_mutex(pld);
54
55 version = kempld_read16(pld, KEMPLD_VERSION);
56 spec = kempld_read8(pld, KEMPLD_SPEC);
57 pld->info.buildnr = kempld_read16(pld, KEMPLD_BUILDNR);
58
59 pld->info.minor = KEMPLD_VERSION_GET_MINOR(version);
60 pld->info.major = KEMPLD_VERSION_GET_MAJOR(version);
61 pld->info.number = KEMPLD_VERSION_GET_NUMBER(version);
62 pld->info.type = KEMPLD_VERSION_GET_TYPE(version);
63
64 if (spec == 0xff) {
65 pld->info.spec_minor = 0;
66 pld->info.spec_major = 1;
67 } else {
68 pld->info.spec_minor = KEMPLD_SPEC_GET_MINOR(spec);
69 pld->info.spec_major = KEMPLD_SPEC_GET_MAJOR(spec);
70 }
71
72 if (pld->info.spec_major > 0)
73 pld->feature_mask = kempld_read16(pld, KEMPLD_FEATURE);
74 else
75 pld->feature_mask = 0;
76
77 kempld_release_mutex(pld);
78
79 return 0;
80}
81
82enum kempld_cells {
83 KEMPLD_I2C = 0,
84 KEMPLD_WDT,
85 KEMPLD_GPIO,
86 KEMPLD_UART,
87};
88
89static struct mfd_cell kempld_devs[] = {
90 [KEMPLD_I2C] = {
91 .name = "kempld-i2c",
92 },
93 [KEMPLD_WDT] = {
94 .name = "kempld-wdt",
95 },
96 [KEMPLD_GPIO] = {
97 .name = "kempld-gpio",
98 },
99 [KEMPLD_UART] = {
100 .name = "kempld-uart",
101 },
102};
103
104#define KEMPLD_MAX_DEVS ARRAY_SIZE(kempld_devs)
105
106static int kempld_register_cells_generic(struct kempld_device_data *pld)
107{
108 struct mfd_cell devs[KEMPLD_MAX_DEVS];
109 int i = 0;
110
111 if (pld->feature_mask & KEMPLD_FEATURE_BIT_I2C)
112 devs[i++] = kempld_devs[KEMPLD_I2C];
113
114 if (pld->feature_mask & KEMPLD_FEATURE_BIT_WATCHDOG)
115 devs[i++] = kempld_devs[KEMPLD_WDT];
116
117 if (pld->feature_mask & KEMPLD_FEATURE_BIT_GPIO)
118 devs[i++] = kempld_devs[KEMPLD_GPIO];
119
120 if (pld->feature_mask & KEMPLD_FEATURE_MASK_UART)
121 devs[i++] = kempld_devs[KEMPLD_UART];
122
123 return mfd_add_devices(pld->dev, -1, devs, i, NULL, 0, NULL);
124}
125
126static struct resource kempld_ioresource = {
127 .start = KEMPLD_IOINDEX,
128 .end = KEMPLD_IODATA,
129 .flags = IORESOURCE_IO,
130};
131
132static const struct kempld_platform_data kempld_platform_data_generic = {
133 .pld_clock = KEMPLD_CLK,
134 .ioresource = &kempld_ioresource,
135 .get_hardware_mutex = kempld_get_hardware_mutex,
136 .release_hardware_mutex = kempld_release_hardware_mutex,
137 .get_info = kempld_get_info_generic,
138 .register_cells = kempld_register_cells_generic,
139};
140
141static struct platform_device *kempld_pdev;
142
143static int kempld_create_platform_device(const struct dmi_system_id *id)
144{
145 struct kempld_platform_data *pdata = id->driver_data;
146 int ret;
147
148 kempld_pdev = platform_device_alloc("kempld", -1);
149 if (!kempld_pdev)
150 return -ENOMEM;
151
152 ret = platform_device_add_data(kempld_pdev, pdata, sizeof(*pdata));
153 if (ret)
154 goto err;
155
156 ret = platform_device_add_resources(kempld_pdev, pdata->ioresource, 1);
157 if (ret)
158 goto err;
159
160 ret = platform_device_add(kempld_pdev);
161 if (ret)
162 goto err;
163
164 return 0;
165err:
166 platform_device_put(kempld_pdev);
167 return ret;
168}
169
170/**
171 * kempld_read8 - read 8 bit register
172 * @pld: kempld_device_data structure describing the PLD
173 * @index: register index on the chip
174 *
175 * kempld_get_mutex must be called prior to calling this function.
176 */
177u8 kempld_read8(struct kempld_device_data *pld, u8 index)
178{
179 iowrite8(index, pld->io_index);
180 return ioread8(pld->io_data);
181}
182EXPORT_SYMBOL_GPL(kempld_read8);
183
184/**
185 * kempld_write8 - write 8 bit register
186 * @pld: kempld_device_data structure describing the PLD
187 * @index: register index on the chip
188 * @data: new register value
189 *
190 * kempld_get_mutex must be called prior to calling this function.
191 */
192void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data)
193{
194 iowrite8(index, pld->io_index);
195 iowrite8(data, pld->io_data);
196}
197EXPORT_SYMBOL_GPL(kempld_write8);
198
199/**
200 * kempld_read16 - read 16 bit register
201 * @pld: kempld_device_data structure describing the PLD
202 * @index: register index on the chip
203 *
204 * kempld_get_mutex must be called prior to calling this function.
205 */
206u16 kempld_read16(struct kempld_device_data *pld, u8 index)
207{
208 return kempld_read8(pld, index) | kempld_read8(pld, index + 1) << 8;
209}
210EXPORT_SYMBOL_GPL(kempld_read16);
211
212/**
213 * kempld_write16 - write 16 bit register
214 * @pld: kempld_device_data structure describing the PLD
215 * @index: register index on the chip
216 * @data: new register value
217 *
218 * kempld_get_mutex must be called prior to calling this function.
219 */
220void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data)
221{
222 kempld_write8(pld, index, (u8)data);
223 kempld_write8(pld, index + 1, (u8)(data >> 8));
224}
225EXPORT_SYMBOL_GPL(kempld_write16);
226
227/**
228 * kempld_read32 - read 32 bit register
229 * @pld: kempld_device_data structure describing the PLD
230 * @index: register index on the chip
231 *
232 * kempld_get_mutex must be called prior to calling this function.
233 */
234u32 kempld_read32(struct kempld_device_data *pld, u8 index)
235{
236 return kempld_read16(pld, index) | kempld_read16(pld, index + 2) << 16;
237}
238EXPORT_SYMBOL_GPL(kempld_read32);
239
240/**
241 * kempld_write32 - write 32 bit register
242 * @pld: kempld_device_data structure describing the PLD
243 * @index: register index on the chip
244 * @data: new register value
245 *
246 * kempld_get_mutex must be called prior to calling this function.
247 */
248void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data)
249{
250 kempld_write16(pld, index, (u16)data);
251 kempld_write16(pld, index + 2, (u16)(data >> 16));
252}
253EXPORT_SYMBOL_GPL(kempld_write32);
254
255/**
256 * kempld_get_mutex - acquire PLD mutex
257 * @pld: kempld_device_data structure describing the PLD
258 */
259void kempld_get_mutex(struct kempld_device_data *pld)
260{
261 struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
262
263 mutex_lock(&pld->lock);
264 pdata->get_hardware_mutex(pld);
265}
266EXPORT_SYMBOL_GPL(kempld_get_mutex);
267
268/**
269 * kempld_release_mutex - release PLD mutex
270 * @pld: kempld_device_data structure describing the PLD
271 */
272void kempld_release_mutex(struct kempld_device_data *pld)
273{
274 struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
275
276 pdata->release_hardware_mutex(pld);
277 mutex_unlock(&pld->lock);
278}
279EXPORT_SYMBOL_GPL(kempld_release_mutex);
280
281/**
282 * kempld_get_info - update device specific information
283 * @pld: kempld_device_data structure describing the PLD
284 *
285 * This function calls the configured board specific kempld_get_info_XXXX
286 * function which is responsible for gathering information about the specific
287 * hardware. The information is then stored within the pld structure.
288 */
289static int kempld_get_info(struct kempld_device_data *pld)
290{
291 struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
292
293 return pdata->get_info(pld);
294}
295
296/*
297 * kempld_register_cells - register cell drivers
298 *
299 * This function registers cell drivers for the detected hardware by calling
300 * the configured kempld_register_cells_XXXX function which is responsible
301 * to detect and register the needed cell drivers.
302 */
303static int kempld_register_cells(struct kempld_device_data *pld)
304{
305 struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
306
307 return pdata->register_cells(pld);
308}
309
310static int kempld_detect_device(struct kempld_device_data *pld)
311{
312 char *version_type;
313 u8 index_reg;
314 int ret;
315
316 mutex_lock(&pld->lock);
317
318 /* Check for empty IO space */
319 index_reg = ioread8(pld->io_index);
320 if (index_reg == 0xff && ioread8(pld->io_data) == 0xff) {
321 mutex_unlock(&pld->lock);
322 return -ENODEV;
323 }
324
325 /* Release hardware mutex if acquired */
326 if (!(index_reg & KEMPLD_MUTEX_KEY)) {
327 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
328 /* PXT and COMe-cPC2 boards may require a second release */
329 iowrite8(KEMPLD_MUTEX_KEY, pld->io_index);
330 }
331
332 mutex_unlock(&pld->lock);
333
334 ret = kempld_get_info(pld);
335 if (ret)
336 return ret;
337
338 switch (pld->info.type) {
339 case 0:
340 version_type = "release";
341 break;
342 case 1:
343 version_type = "debug";
344 break;
345 case 2:
346 version_type = "custom";
347 break;
348 default:
349 version_type = "unspecified";
350 }
351
352 dev_info(pld->dev, "Found Kontron PLD %d\n", pld->info.number);
353 dev_info(pld->dev, "%s version %d.%d build %d, specification %d.%d\n",
354 version_type, pld->info.major, pld->info.minor,
355 pld->info.buildnr, pld->info.spec_major,
356 pld->info.spec_minor);
357
358 return kempld_register_cells(pld);
359}
360
361static int kempld_probe(struct platform_device *pdev)
362{
363 struct kempld_platform_data *pdata = dev_get_platdata(&pdev->dev);
364 struct device *dev = &pdev->dev;
365 struct kempld_device_data *pld;
366 struct resource *ioport;
367 int ret;
368
369 pld = devm_kzalloc(dev, sizeof(*pld), GFP_KERNEL);
370 if (!pld)
371 return -ENOMEM;
372
373 ioport = platform_get_resource(pdev, IORESOURCE_IO, 0);
374 if (!ioport)
375 return -EINVAL;
376
377 pld->io_base = devm_ioport_map(dev, ioport->start,
378 ioport->end - ioport->start);
379 if (!pld->io_base)
380 return -ENOMEM;
381
382 pld->io_index = pld->io_base;
383 pld->io_data = pld->io_base + 1;
384 pld->pld_clock = pdata->pld_clock;
385 pld->dev = dev;
386
387 mutex_init(&pld->lock);
388 platform_set_drvdata(pdev, pld);
389
390 ret = kempld_detect_device(pld);
391 if (ret)
392 return ret;
393
394 return 0;
395}
396
397static int kempld_remove(struct platform_device *pdev)
398{
399 struct kempld_device_data *pld = platform_get_drvdata(pdev);
400 struct kempld_platform_data *pdata = dev_get_platdata(pld->dev);
401
402 mfd_remove_devices(&pdev->dev);
403 pdata->release_hardware_mutex(pld);
404
405 return 0;
406}
407
408static struct platform_driver kempld_driver = {
409 .driver = {
410 .name = "kempld",
411 .owner = THIS_MODULE,
412 },
413 .probe = kempld_probe,
414 .remove = kempld_remove,
415};
416
417static struct dmi_system_id __initdata kempld_dmi_table[] = {
418 {
419 .ident = "BHL6",
420 .matches = {
421 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
422 DMI_MATCH(DMI_BOARD_NAME, "COMe-bHL6"),
423 },
424 .driver_data = (void *)&kempld_platform_data_generic,
425 .callback = kempld_create_platform_device,
426 },
427 {
428 .ident = "CCR2",
429 .matches = {
430 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
431 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP2"),
432 },
433 .driver_data = (void *)&kempld_platform_data_generic,
434 .callback = kempld_create_platform_device,
435 }, {
436 .ident = "CCR6",
437 .matches = {
438 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
439 DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP6"),
440 },
441 .driver_data = (void *)&kempld_platform_data_generic,
442 .callback = kempld_create_platform_device,
443 }, {
444 .ident = "CHL6",
445 .matches = {
446 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
447 DMI_MATCH(DMI_BOARD_NAME, "COMe-cHL6"),
448 },
449 .driver_data = (void *)&kempld_platform_data_generic,
450 .callback = kempld_create_platform_device,
451 }, {
452 .ident = "CHR2",
453 .matches = {
454 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
455 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T2"),
456 },
457 .driver_data = (void *)&kempld_platform_data_generic,
458 .callback = kempld_create_platform_device,
459 }, {
460 .ident = "CHR2",
461 .matches = {
462 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
463 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T2"),
464 },
465 .driver_data = (void *)&kempld_platform_data_generic,
466 .callback = kempld_create_platform_device,
467 }, {
468 .ident = "CHR2",
469 .matches = {
470 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
471 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC2"),
472 },
473 .driver_data = (void *)&kempld_platform_data_generic,
474 .callback = kempld_create_platform_device,
475 }, {
476 .ident = "CHR6",
477 .matches = {
478 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
479 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T6"),
480 },
481 .driver_data = (void *)&kempld_platform_data_generic,
482 .callback = kempld_create_platform_device,
483 }, {
484 .ident = "CHR6",
485 .matches = {
486 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
487 DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T6"),
488 },
489 .driver_data = (void *)&kempld_platform_data_generic,
490 .callback = kempld_create_platform_device,
491 }, {
492 .ident = "CHR6",
493 .matches = {
494 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
495 DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC6"),
496 },
497 .driver_data = (void *)&kempld_platform_data_generic,
498 .callback = kempld_create_platform_device,
499 }, {
500 .ident = "CNTG",
501 .matches = {
502 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
503 DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-PC"),
504 },
505 .driver_data = (void *)&kempld_platform_data_generic,
506 .callback = kempld_create_platform_device,
507 }, {
508 .ident = "CNTG",
509 .matches = {
510 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
511 DMI_MATCH(DMI_BOARD_NAME, "COMe-bPC2"),
512 },
513 .driver_data = (void *)&kempld_platform_data_generic,
514 .callback = kempld_create_platform_device,
515 }, {
516 .ident = "CNTX",
517 .matches = {
518 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
519 DMI_MATCH(DMI_BOARD_NAME, "PXT"),
520 },
521 .driver_data = (void *)&kempld_platform_data_generic,
522 .callback = kempld_create_platform_device,
523 }, {
524 .ident = "CVV6",
525 .matches = {
526 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
527 DMI_MATCH(DMI_BOARD_NAME, "COMe-cBT"),
528 },
529 .driver_data = (void *)&kempld_platform_data_generic,
530 .callback = kempld_create_platform_device,
531 }, {
532 .ident = "FRI2",
533 .matches = {
534 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
535 DMI_MATCH(DMI_BIOS_VERSION, "FRI2"),
536 },
537 .driver_data = (void *)&kempld_platform_data_generic,
538 .callback = kempld_create_platform_device,
539 }, {
540 .ident = "FRI2",
541 .matches = {
542 DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"),
543 },
544 .driver_data = (void *)&kempld_platform_data_generic,
545 .callback = kempld_create_platform_device,
546 }, {
547 .ident = "MBR1",
548 .matches = {
549 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
550 DMI_MATCH(DMI_BOARD_NAME, "ETX-OH"),
551 },
552 .driver_data = (void *)&kempld_platform_data_generic,
553 .callback = kempld_create_platform_device,
554 }, {
555 .ident = "MVV1",
556 .matches = {
557 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
558 DMI_MATCH(DMI_BOARD_NAME, "COMe-mBT"),
559 },
560 .driver_data = (void *)&kempld_platform_data_generic,
561 .callback = kempld_create_platform_device,
562 }, {
563 .ident = "NTC1",
564 .matches = {
565 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
566 DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"),
567 },
568 .driver_data = (void *)&kempld_platform_data_generic,
569 .callback = kempld_create_platform_device,
570 }, {
571 .ident = "NTC1",
572 .matches = {
573 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
574 DMI_MATCH(DMI_BOARD_NAME, "nETXe-TT"),
575 },
576 .driver_data = (void *)&kempld_platform_data_generic,
577 .callback = kempld_create_platform_device,
578 }, {
579 .ident = "NTC1",
580 .matches = {
581 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
582 DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"),
583 },
584 .driver_data = (void *)&kempld_platform_data_generic,
585 .callback = kempld_create_platform_device,
586 }, {
587 .ident = "NUP1",
588 .matches = {
589 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
590 DMI_MATCH(DMI_BOARD_NAME, "COMe-mCT"),
591 },
592 .driver_data = (void *)&kempld_platform_data_generic,
593 .callback = kempld_create_platform_device,
594 }, {
595 .ident = "UNP1",
596 .matches = {
597 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
598 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-DC"),
599 },
600 .driver_data = (void *)&kempld_platform_data_generic,
601 .callback = kempld_create_platform_device,
602 }, {
603 .ident = "UNP1",
604 .matches = {
605 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
606 DMI_MATCH(DMI_BOARD_NAME, "COMe-cDC2"),
607 },
608 .driver_data = (void *)&kempld_platform_data_generic,
609 .callback = kempld_create_platform_device,
610 }, {
611 .ident = "UNTG",
612 .matches = {
613 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
614 DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-PC"),
615 },
616 .driver_data = (void *)&kempld_platform_data_generic,
617 .callback = kempld_create_platform_device,
618 }, {
619 .ident = "UNTG",
620 .matches = {
621 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
622 DMI_MATCH(DMI_BOARD_NAME, "COMe-cPC2"),
623 },
624 .driver_data = (void *)&kempld_platform_data_generic,
625 .callback = kempld_create_platform_device,
626 }, {
627 .ident = "UUP6",
628 .matches = {
629 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
630 DMI_MATCH(DMI_BOARD_NAME, "COMe-cCT6"),
631 },
632 .driver_data = (void *)&kempld_platform_data_generic,
633 .callback = kempld_create_platform_device,
634 },
635 {
636 .ident = "UTH6",
637 .matches = {
638 DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"),
639 DMI_MATCH(DMI_BOARD_NAME, "COMe-cTH6"),
640 },
641 .driver_data = (void *)&kempld_platform_data_generic,
642 .callback = kempld_create_platform_device,
643 },
644 {}
645};
646MODULE_DEVICE_TABLE(dmi, kempld_dmi_table);
647
648static int __init kempld_init(void)
649{
650 const struct dmi_system_id *id;
651 int ret;
652
653 if (force_device_id[0]) {
654 for (id = kempld_dmi_table; id->matches[0].slot != DMI_NONE; id++)
655 if (strstr(id->ident, force_device_id))
656 if (id->callback && id->callback(id))
657 break;
658 if (id->matches[0].slot == DMI_NONE)
659 return -ENODEV;
660 } else {
661 if (!dmi_check_system(kempld_dmi_table))
662 return -ENODEV;
663 }
664
665 ret = platform_driver_register(&kempld_driver);
666 if (ret)
667 return ret;
668
669 return 0;
670}
671
672static void __exit kempld_exit(void)
673{
674 if (kempld_pdev)
675 platform_device_unregister(kempld_pdev);
676
677 platform_driver_unregister(&kempld_driver);
678}
679
680module_init(kempld_init);
681module_exit(kempld_exit);
682
683MODULE_DESCRIPTION("KEM PLD Core Driver");
684MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>");
685MODULE_LICENSE("GPL");
686MODULE_ALIAS("platform:kempld-core");