summaryrefslogtreecommitdiff
path: root/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
blob: f65b2fc0919895b679cc0af6cc11b19f93f16dfd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
// SPDX-License-Identifier: GPL-2.0-only
/*
 * INT3400 thermal driver
 *
 * Copyright (C) 2014, Intel Corporation
 * Authors: Zhang Rui <rui.zhang@intel.com>
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/thermal.h>
#include "acpi_thermal_rel.h"

#define INT3400_THERMAL_TABLE_CHANGED 0x83
#define INT3400_ODVP_CHANGED 0x88

enum int3400_thermal_uuid {
	INT3400_THERMAL_PASSIVE_1,
	INT3400_THERMAL_ACTIVE,
	INT3400_THERMAL_CRITICAL,
	INT3400_THERMAL_ADAPTIVE_PERFORMANCE,
	INT3400_THERMAL_EMERGENCY_CALL_MODE,
	INT3400_THERMAL_PASSIVE_2,
	INT3400_THERMAL_POWER_BOSS,
	INT3400_THERMAL_VIRTUAL_SENSOR,
	INT3400_THERMAL_COOLING_MODE,
	INT3400_THERMAL_HARDWARE_DUTY_CYCLING,
	INT3400_THERMAL_MAXIMUM_UUID,
};

static char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
	"42A441D6-AE6A-462b-A84B-4A8CE79027D3",
	"3A95C389-E4B8-4629-A526-C52C88626BAE",
	"97C68AE7-15FA-499c-B8C9-5DA81D606E0A",
	"63BE270F-1C11-48FD-A6F7-3AF253FF3E2D",
	"5349962F-71E6-431D-9AE8-0A635B710AEE",
	"9E04115A-AE87-4D1C-9500-0F3E340BFE75",
	"F5A35014-C209-46A4-993A-EB56DE7530A1",
	"6ED722A7-9240-48A5-B479-31EEF723D7CF",
	"16CAF1B7-DD38-40ED-B1C1-1B8A1913D531",
	"BE84BABF-C4D4-403D-B495-3128FD44dAC1",
};

struct odvp_attr;

struct int3400_thermal_priv {
	struct acpi_device *adev;
	struct platform_device *pdev;
	struct thermal_zone_device *thermal;
	int art_count;
	struct art *arts;
	int trt_count;
	struct trt *trts;
	u8 uuid_bitmap;
	int rel_misc_dev_res;
	int current_uuid_index;
	char *data_vault;
	int odvp_count;
	int *odvp;
	struct odvp_attr *odvp_attrs;
};

static int evaluate_odvp(struct int3400_thermal_priv *priv);

struct odvp_attr {
	int odvp;
	struct int3400_thermal_priv *priv;
	struct kobj_attribute attr;
};

static ssize_t data_vault_read(struct file *file, struct kobject *kobj,
	     struct bin_attribute *attr, char *buf, loff_t off, size_t count)
{
	memcpy(buf, attr->private + off, count);
	return count;
}

static BIN_ATTR_RO(data_vault, 0);

static struct bin_attribute *data_attributes[] = {
	&bin_attr_data_vault,
	NULL,
};

static const struct attribute_group data_attribute_group = {
	.bin_attrs = data_attributes,
};

static ssize_t available_uuids_show(struct device *dev,
				    struct device_attribute *attr,
				    char *buf)
{
	struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
	int i;
	int length = 0;

	if (!priv->uuid_bitmap)
		return sprintf(buf, "UNKNOWN\n");

	for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; i++) {
		if (priv->uuid_bitmap & (1 << i))
			if (PAGE_SIZE - length > 0)
				length += scnprintf(&buf[length],
						   PAGE_SIZE - length,
						   "%s\n",
						   int3400_thermal_uuids[i]);
	}

	return length;
}

static ssize_t current_uuid_show(struct device *dev,
				 struct device_attribute *devattr, char *buf)
{
	struct int3400_thermal_priv *priv = dev_get_drvdata(dev);

	if (priv->current_uuid_index == -1)
		return sprintf(buf, "INVALID\n");

	return sprintf(buf, "%s\n",
		       int3400_thermal_uuids[priv->current_uuid_index]);
}

static ssize_t current_uuid_store(struct device *dev,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
{
	struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
	int i;

	for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; ++i) {
		if (!strncmp(buf, int3400_thermal_uuids[i],
			     sizeof(int3400_thermal_uuids[i]) - 1)) {
			/*
			 * If we have a list of supported UUIDs, make sure
			 * this one is supported.
			 */
			if (priv->uuid_bitmap &&
			    !(priv->uuid_bitmap & (1 << i)))
				return -EINVAL;

			priv->current_uuid_index = i;
			return count;
		}
	}

	return -EINVAL;
}

static DEVICE_ATTR_RW(current_uuid);
static DEVICE_ATTR_RO(available_uuids);
static struct attribute *uuid_attrs[] = {
	&dev_attr_available_uuids.attr,
	&dev_attr_current_uuid.attr,
	NULL
};

static const struct attribute_group uuid_attribute_group = {
	.attrs = uuid_attrs,
	.name = "uuids"
};

static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv)
{
	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL};
	union acpi_object *obja, *objb;
	int i, j;
	int result = 0;
	acpi_status status;

	status = acpi_evaluate_object(priv->adev->handle, "IDSP", NULL, &buf);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	obja = (union acpi_object *)buf.pointer;
	if (obja->type != ACPI_TYPE_PACKAGE) {
		result = -EINVAL;
		goto end;
	}

	for (i = 0; i < obja->package.count; i++) {
		objb = &obja->package.elements[i];
		if (objb->type != ACPI_TYPE_BUFFER) {
			result = -EINVAL;
			goto end;
		}

		/* UUID must be 16 bytes */
		if (objb->buffer.length != 16) {
			result = -EINVAL;
			goto end;
		}

		for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) {
			guid_t guid;

			guid_parse(int3400_thermal_uuids[j], &guid);
			if (guid_equal((guid_t *)objb->buffer.pointer, &guid)) {
				priv->uuid_bitmap |= (1 << j);
				break;
			}
		}
	}

end:
	kfree(buf.pointer);
	return result;
}

static int int3400_thermal_run_osc(acpi_handle handle,
				enum int3400_thermal_uuid uuid, bool enable)
{
	u32 ret, buf[2];
	acpi_status status;
	int result = 0;
	struct acpi_osc_context context = {
		.uuid_str = int3400_thermal_uuids[uuid],
		.rev = 1,
		.cap.length = 8,
	};

	buf[OSC_QUERY_DWORD] = 0;
	buf[OSC_SUPPORT_DWORD] = enable;

	context.cap.pointer = buf;

	status = acpi_run_osc(handle, &context);
	if (ACPI_SUCCESS(status)) {
		ret = *((u32 *)(context.ret.pointer + 4));
		if (ret != enable)
			result = -EPERM;
	} else
		result = -EPERM;

	kfree(context.ret.pointer);

	return result;
}

static ssize_t odvp_show(struct kobject *kobj, struct kobj_attribute *attr,
			 char *buf)
{
	struct odvp_attr *odvp_attr;

	odvp_attr = container_of(attr, struct odvp_attr, attr);

	return sprintf(buf, "%d\n", odvp_attr->priv->odvp[odvp_attr->odvp]);
}

static void cleanup_odvp(struct int3400_thermal_priv *priv)
{
	int i;

	if (priv->odvp_attrs) {
		for (i = 0; i < priv->odvp_count; i++) {
			sysfs_remove_file(&priv->pdev->dev.kobj,
					  &priv->odvp_attrs[i].attr.attr);
			kfree(priv->odvp_attrs[i].attr.attr.name);
		}
		kfree(priv->odvp_attrs);
	}
	kfree(priv->odvp);
	priv->odvp_count = 0;
}

static int evaluate_odvp(struct int3400_thermal_priv *priv)
{
	struct acpi_buffer odvp = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj = NULL;
	acpi_status status;
	int i, ret;

	status = acpi_evaluate_object(priv->adev->handle, "ODVP", NULL, &odvp);
	if (ACPI_FAILURE(status)) {
		ret = -EINVAL;
		goto out_err;
	}

	obj = odvp.pointer;
	if (obj->type != ACPI_TYPE_PACKAGE) {
		ret = -EINVAL;
		goto out_err;
	}

	if (priv->odvp == NULL) {
		priv->odvp_count = obj->package.count;
		priv->odvp = kmalloc_array(priv->odvp_count, sizeof(int),
				     GFP_KERNEL);
		if (!priv->odvp) {
			ret = -ENOMEM;
			goto out_err;
		}
	}

	if (priv->odvp_attrs == NULL) {
		priv->odvp_attrs = kcalloc(priv->odvp_count,
					   sizeof(struct odvp_attr),
					   GFP_KERNEL);
		if (!priv->odvp_attrs) {
			ret = -ENOMEM;
			goto out_err;
		}
		for (i = 0; i < priv->odvp_count; i++) {
			struct odvp_attr *odvp = &priv->odvp_attrs[i];

			sysfs_attr_init(&odvp->attr.attr);
			odvp->priv = priv;
			odvp->odvp = i;
			odvp->attr.attr.name = kasprintf(GFP_KERNEL,
							 "odvp%d", i);

			if (!odvp->attr.attr.name) {
				ret = -ENOMEM;
				goto out_err;
			}
			odvp->attr.attr.mode = 0444;
			odvp->attr.show = odvp_show;
			odvp->attr.store = NULL;
			ret = sysfs_create_file(&priv->pdev->dev.kobj,
						&odvp->attr.attr);
			if (ret)
				goto out_err;
		}
	}

	for (i = 0; i < obj->package.count; i++) {
		if (obj->package.elements[i].type == ACPI_TYPE_INTEGER)
			priv->odvp[i] = obj->package.elements[i].integer.value;
	}

	kfree(obj);
	return 0;

out_err:
	cleanup_odvp(priv);
	kfree(obj);
	return ret;
}

static void int3400_notify(acpi_handle handle,
			u32 event,
			void *data)
{
	struct int3400_thermal_priv *priv = data;
	char *thermal_prop[5];

	if (!priv)
		return;

	switch (event) {
	case INT3400_THERMAL_TABLE_CHANGED:
		thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s",
				priv->thermal->type);
		thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d",
				priv->thermal->temperature);
		thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=");
		thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d",
				THERMAL_TABLE_CHANGED);
		thermal_prop[4] = NULL;
		kobject_uevent_env(&priv->thermal->device.kobj, KOBJ_CHANGE,
				thermal_prop);
		break;
	case INT3400_ODVP_CHANGED:
		evaluate_odvp(priv);
		break;
	default:
		/* Ignore unknown notification codes sent to INT3400 device */
		break;
	}
}

static int int3400_thermal_get_temp(struct thermal_zone_device *thermal,
			int *temp)
{
	*temp = 20 * 1000; /* faked temp sensor with 20C */
	return 0;
}

static int int3400_thermal_get_mode(struct thermal_zone_device *thermal,
				enum thermal_device_mode *mode)
{
	*mode = thermal->mode;

	return 0;
}

static int int3400_thermal_set_mode(struct thermal_zone_device *thermal,
				enum thermal_device_mode mode)
{
	struct int3400_thermal_priv *priv = thermal->devdata;
	int result = 0;

	if (!priv)
		return -EINVAL;

	if (mode != THERMAL_DEVICE_ENABLED &&
	    mode != THERMAL_DEVICE_DISABLED)
		return -EINVAL;

	if (mode != thermal->mode) {
		thermal->mode = mode;
		result = int3400_thermal_run_osc(priv->adev->handle,
						priv->current_uuid_index,
						mode == THERMAL_DEVICE_ENABLED);
	}

	evaluate_odvp(priv);

	return result;
}

static struct thermal_zone_device_ops int3400_thermal_ops = {
	.get_temp = int3400_thermal_get_temp,
	.get_mode = int3400_thermal_get_mode,
	.set_mode = int3400_thermal_set_mode,
};

static struct thermal_zone_params int3400_thermal_params = {
	.governor_name = "user_space",
	.no_hwmon = true,
};

static void int3400_setup_gddv(struct int3400_thermal_priv *priv)
{
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;
	acpi_status status;

	status = acpi_evaluate_object(priv->adev->handle, "GDDV", NULL,
				      &buffer);
	if (ACPI_FAILURE(status) || !buffer.length)
		return;

	obj = buffer.pointer;
	if (obj->type != ACPI_TYPE_PACKAGE || obj->package.count != 1
	    || obj->package.elements[0].type != ACPI_TYPE_BUFFER) {
		kfree(buffer.pointer);
		return;
	}

	priv->data_vault = kmemdup(obj->package.elements[0].buffer.pointer,
				   obj->package.elements[0].buffer.length,
				   GFP_KERNEL);
	bin_attr_data_vault.private = priv->data_vault;
	bin_attr_data_vault.size = obj->package.elements[0].buffer.length;
	kfree(buffer.pointer);
}

static int int3400_thermal_probe(struct platform_device *pdev)
{
	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
	struct int3400_thermal_priv *priv;
	int result;

	if (!adev)
		return -ENODEV;

	priv = kzalloc(sizeof(struct int3400_thermal_priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->pdev = pdev;
	priv->adev = adev;

	result = int3400_thermal_get_uuids(priv);

	/* Missing IDSP isn't fatal */
	if (result && result != -ENODEV)
		goto free_priv;

	priv->current_uuid_index = -1;

	result = acpi_parse_art(priv->adev->handle, &priv->art_count,
				&priv->arts, true);
	if (result)
		dev_dbg(&pdev->dev, "_ART table parsing error\n");

	result = acpi_parse_trt(priv->adev->handle, &priv->trt_count,
				&priv->trts, true);
	if (result)
		dev_dbg(&pdev->dev, "_TRT table parsing error\n");

	platform_set_drvdata(pdev, priv);

	int3400_setup_gddv(priv);

	evaluate_odvp(priv);

	priv->thermal = thermal_zone_device_register("INT3400 Thermal", 0, 0,
						priv, &int3400_thermal_ops,
						&int3400_thermal_params, 0, 0);
	if (IS_ERR(priv->thermal)) {
		result = PTR_ERR(priv->thermal);
		goto free_art_trt;
	}

	priv->rel_misc_dev_res = acpi_thermal_rel_misc_device_add(
							priv->adev->handle);

	result = sysfs_create_group(&pdev->dev.kobj, &uuid_attribute_group);
	if (result)
		goto free_rel_misc;

	if (priv->data_vault) {
		result = sysfs_create_group(&pdev->dev.kobj,
					    &data_attribute_group);
		if (result)
			goto free_uuid;
	}

	result = acpi_install_notify_handler(
			priv->adev->handle, ACPI_DEVICE_NOTIFY, int3400_notify,
			(void *)priv);
	if (result)
		goto free_sysfs;

	return 0;

free_sysfs:
	cleanup_odvp(priv);
	if (priv->data_vault) {
		sysfs_remove_group(&pdev->dev.kobj, &data_attribute_group);
		kfree(priv->data_vault);
	}
free_uuid:
	sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group);
free_rel_misc:
	if (!priv->rel_misc_dev_res)
		acpi_thermal_rel_misc_device_remove(priv->adev->handle);
	thermal_zone_device_unregister(priv->thermal);
free_art_trt:
	kfree(priv->trts);
	kfree(priv->arts);
free_priv:
	kfree(priv);
	return result;
}

static int int3400_thermal_remove(struct platform_device *pdev)
{
	struct int3400_thermal_priv *priv = platform_get_drvdata(pdev);

	acpi_remove_notify_handler(
			priv->adev->handle, ACPI_DEVICE_NOTIFY,
			int3400_notify);

	cleanup_odvp(priv);

	if (!priv->rel_misc_dev_res)
		acpi_thermal_rel_misc_device_remove(priv->adev->handle);

	if (priv->data_vault)
		sysfs_remove_group(&pdev->dev.kobj, &data_attribute_group);
	sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group);
	thermal_zone_device_unregister(priv->thermal);
	kfree(priv->data_vault);
	kfree(priv->trts);
	kfree(priv->arts);
	kfree(priv);
	return 0;
}

static const struct acpi_device_id int3400_thermal_match[] = {
	{"INT3400", 0},
	{"INTC1040", 0},
	{}
};

MODULE_DEVICE_TABLE(acpi, int3400_thermal_match);

static struct platform_driver int3400_thermal_driver = {
	.probe = int3400_thermal_probe,
	.remove = int3400_thermal_remove,
	.driver = {
		   .name = "int3400 thermal",
		   .acpi_match_table = ACPI_PTR(int3400_thermal_match),
		   },
};

module_platform_driver(int3400_thermal_driver);

MODULE_DESCRIPTION("INT3400 Thermal driver");
MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
MODULE_LICENSE("GPL");