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9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/acpi.h>
12#include <linux/thermal.h>
13#include "acpi_thermal_rel.h"
14
15#define INT3400_THERMAL_TABLE_CHANGED 0x83
16#define INT3400_ODVP_CHANGED 0x88
17#define INT3400_KEEP_ALIVE 0xA0
18
19enum int3400_thermal_uuid {
20 INT3400_THERMAL_PASSIVE_1,
21 INT3400_THERMAL_ACTIVE,
22 INT3400_THERMAL_CRITICAL,
23 INT3400_THERMAL_ADAPTIVE_PERFORMANCE,
24 INT3400_THERMAL_EMERGENCY_CALL_MODE,
25 INT3400_THERMAL_PASSIVE_2,
26 INT3400_THERMAL_POWER_BOSS,
27 INT3400_THERMAL_VIRTUAL_SENSOR,
28 INT3400_THERMAL_COOLING_MODE,
29 INT3400_THERMAL_HARDWARE_DUTY_CYCLING,
30 INT3400_THERMAL_MAXIMUM_UUID,
31};
32
33static char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
34 "42A441D6-AE6A-462b-A84B-4A8CE79027D3",
35 "3A95C389-E4B8-4629-A526-C52C88626BAE",
36 "97C68AE7-15FA-499c-B8C9-5DA81D606E0A",
37 "63BE270F-1C11-48FD-A6F7-3AF253FF3E2D",
38 "5349962F-71E6-431D-9AE8-0A635B710AEE",
39 "9E04115A-AE87-4D1C-9500-0F3E340BFE75",
40 "F5A35014-C209-46A4-993A-EB56DE7530A1",
41 "6ED722A7-9240-48A5-B479-31EEF723D7CF",
42 "16CAF1B7-DD38-40ED-B1C1-1B8A1913D531",
43 "BE84BABF-C4D4-403D-B495-3128FD44dAC1",
44};
45
46struct odvp_attr;
47
48struct int3400_thermal_priv {
49 struct acpi_device *adev;
50 struct platform_device *pdev;
51 struct thermal_zone_device *thermal;
52 int art_count;
53 struct art *arts;
54 int trt_count;
55 struct trt *trts;
56 u8 uuid_bitmap;
57 int rel_misc_dev_res;
58 int current_uuid_index;
59 char *data_vault;
60 int odvp_count;
61 int *odvp;
62 struct odvp_attr *odvp_attrs;
63};
64
65static int evaluate_odvp(struct int3400_thermal_priv *priv);
66
67struct odvp_attr {
68 int odvp;
69 struct int3400_thermal_priv *priv;
70 struct kobj_attribute attr;
71};
72
73static ssize_t data_vault_read(struct file *file, struct kobject *kobj,
74 struct bin_attribute *attr, char *buf, loff_t off, size_t count)
75{
76 memcpy(buf, attr->private + off, count);
77 return count;
78}
79
80static BIN_ATTR_RO(data_vault, 0);
81
82static struct bin_attribute *data_attributes[] = {
83 &bin_attr_data_vault,
84 NULL,
85};
86
87static ssize_t imok_store(struct device *dev, struct device_attribute *attr,
88 const char *buf, size_t count)
89{
90 struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
91 acpi_status status;
92 int input, ret;
93
94 ret = kstrtouint(buf, 10, &input);
95 if (ret)
96 return ret;
97 status = acpi_execute_simple_method(priv->adev->handle, "IMOK", input);
98 if (ACPI_FAILURE(status))
99 return -EIO;
100
101 return count;
102}
103
104static DEVICE_ATTR_WO(imok);
105
106static struct attribute *imok_attr[] = {
107 &dev_attr_imok.attr,
108 NULL
109};
110
111static const struct attribute_group imok_attribute_group = {
112 .attrs = imok_attr,
113};
114
115static const struct attribute_group data_attribute_group = {
116 .bin_attrs = data_attributes,
117};
118
119static ssize_t available_uuids_show(struct device *dev,
120 struct device_attribute *attr,
121 char *buf)
122{
123 struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
124 int i;
125 int length = 0;
126
127 if (!priv->uuid_bitmap)
128 return sprintf(buf, "UNKNOWN\n");
129
130 for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; i++) {
131 if (priv->uuid_bitmap & (1 << i))
132 if (PAGE_SIZE - length > 0)
133 length += scnprintf(&buf[length],
134 PAGE_SIZE - length,
135 "%s\n",
136 int3400_thermal_uuids[i]);
137 }
138
139 return length;
140}
141
142static ssize_t current_uuid_show(struct device *dev,
143 struct device_attribute *devattr, char *buf)
144{
145 struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
146
147 if (priv->current_uuid_index == -1)
148 return sprintf(buf, "INVALID\n");
149
150 return sprintf(buf, "%s\n",
151 int3400_thermal_uuids[priv->current_uuid_index]);
152}
153
154static ssize_t current_uuid_store(struct device *dev,
155 struct device_attribute *attr,
156 const char *buf, size_t count)
157{
158 struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
159 int i;
160
161 for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; ++i) {
162 if (!strncmp(buf, int3400_thermal_uuids[i],
163 sizeof(int3400_thermal_uuids[i]) - 1)) {
164
165
166
167
168 if (priv->uuid_bitmap &&
169 !(priv->uuid_bitmap & (1 << i)))
170 return -EINVAL;
171
172 priv->current_uuid_index = i;
173 return count;
174 }
175 }
176
177 return -EINVAL;
178}
179
180static DEVICE_ATTR_RW(current_uuid);
181static DEVICE_ATTR_RO(available_uuids);
182static struct attribute *uuid_attrs[] = {
183 &dev_attr_available_uuids.attr,
184 &dev_attr_current_uuid.attr,
185 NULL
186};
187
188static const struct attribute_group uuid_attribute_group = {
189 .attrs = uuid_attrs,
190 .name = "uuids"
191};
192
193static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv)
194{
195 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL};
196 union acpi_object *obja, *objb;
197 int i, j;
198 int result = 0;
199 acpi_status status;
200
201 status = acpi_evaluate_object(priv->adev->handle, "IDSP", NULL, &buf);
202 if (ACPI_FAILURE(status))
203 return -ENODEV;
204
205 obja = (union acpi_object *)buf.pointer;
206 if (obja->type != ACPI_TYPE_PACKAGE) {
207 result = -EINVAL;
208 goto end;
209 }
210
211 for (i = 0; i < obja->package.count; i++) {
212 objb = &obja->package.elements[i];
213 if (objb->type != ACPI_TYPE_BUFFER) {
214 result = -EINVAL;
215 goto end;
216 }
217
218
219 if (objb->buffer.length != 16) {
220 result = -EINVAL;
221 goto end;
222 }
223
224 for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) {
225 guid_t guid;
226
227 guid_parse(int3400_thermal_uuids[j], &guid);
228 if (guid_equal((guid_t *)objb->buffer.pointer, &guid)) {
229 priv->uuid_bitmap |= (1 << j);
230 break;
231 }
232 }
233 }
234
235end:
236 kfree(buf.pointer);
237 return result;
238}
239
240static int int3400_thermal_run_osc(acpi_handle handle,
241 enum int3400_thermal_uuid uuid, bool enable)
242{
243 u32 ret, buf[2];
244 acpi_status status;
245 int result = 0;
246 struct acpi_osc_context context = {
247 .uuid_str = NULL,
248 .rev = 1,
249 .cap.length = 8,
250 };
251
252 if (uuid < 0 || uuid >= INT3400_THERMAL_MAXIMUM_UUID)
253 return -EINVAL;
254
255 context.uuid_str = int3400_thermal_uuids[uuid];
256
257 buf[OSC_QUERY_DWORD] = 0;
258 buf[OSC_SUPPORT_DWORD] = enable;
259
260 context.cap.pointer = buf;
261
262 status = acpi_run_osc(handle, &context);
263 if (ACPI_SUCCESS(status)) {
264 ret = *((u32 *)(context.ret.pointer + 4));
265 if (ret != enable)
266 result = -EPERM;
267 } else
268 result = -EPERM;
269
270 kfree(context.ret.pointer);
271
272 return result;
273}
274
275static ssize_t odvp_show(struct kobject *kobj, struct kobj_attribute *attr,
276 char *buf)
277{
278 struct odvp_attr *odvp_attr;
279
280 odvp_attr = container_of(attr, struct odvp_attr, attr);
281
282 return sprintf(buf, "%d\n", odvp_attr->priv->odvp[odvp_attr->odvp]);
283}
284
285static void cleanup_odvp(struct int3400_thermal_priv *priv)
286{
287 int i;
288
289 if (priv->odvp_attrs) {
290 for (i = 0; i < priv->odvp_count; i++) {
291 sysfs_remove_file(&priv->pdev->dev.kobj,
292 &priv->odvp_attrs[i].attr.attr);
293 kfree(priv->odvp_attrs[i].attr.attr.name);
294 }
295 kfree(priv->odvp_attrs);
296 }
297 kfree(priv->odvp);
298 priv->odvp_count = 0;
299}
300
301static int evaluate_odvp(struct int3400_thermal_priv *priv)
302{
303 struct acpi_buffer odvp = { ACPI_ALLOCATE_BUFFER, NULL };
304 union acpi_object *obj = NULL;
305 acpi_status status;
306 int i, ret;
307
308 status = acpi_evaluate_object(priv->adev->handle, "ODVP", NULL, &odvp);
309 if (ACPI_FAILURE(status)) {
310 ret = -EINVAL;
311 goto out_err;
312 }
313
314 obj = odvp.pointer;
315 if (obj->type != ACPI_TYPE_PACKAGE) {
316 ret = -EINVAL;
317 goto out_err;
318 }
319
320 if (priv->odvp == NULL) {
321 priv->odvp_count = obj->package.count;
322 priv->odvp = kmalloc_array(priv->odvp_count, sizeof(int),
323 GFP_KERNEL);
324 if (!priv->odvp) {
325 ret = -ENOMEM;
326 goto out_err;
327 }
328 }
329
330 if (priv->odvp_attrs == NULL) {
331 priv->odvp_attrs = kcalloc(priv->odvp_count,
332 sizeof(struct odvp_attr),
333 GFP_KERNEL);
334 if (!priv->odvp_attrs) {
335 ret = -ENOMEM;
336 goto out_err;
337 }
338 for (i = 0; i < priv->odvp_count; i++) {
339 struct odvp_attr *odvp = &priv->odvp_attrs[i];
340
341 sysfs_attr_init(&odvp->attr.attr);
342 odvp->priv = priv;
343 odvp->odvp = i;
344 odvp->attr.attr.name = kasprintf(GFP_KERNEL,
345 "odvp%d", i);
346
347 if (!odvp->attr.attr.name) {
348 ret = -ENOMEM;
349 goto out_err;
350 }
351 odvp->attr.attr.mode = 0444;
352 odvp->attr.show = odvp_show;
353 odvp->attr.store = NULL;
354 ret = sysfs_create_file(&priv->pdev->dev.kobj,
355 &odvp->attr.attr);
356 if (ret)
357 goto out_err;
358 }
359 }
360
361 for (i = 0; i < obj->package.count; i++) {
362 if (obj->package.elements[i].type == ACPI_TYPE_INTEGER)
363 priv->odvp[i] = obj->package.elements[i].integer.value;
364 }
365
366 kfree(obj);
367 return 0;
368
369out_err:
370 cleanup_odvp(priv);
371 kfree(obj);
372 return ret;
373}
374
375static void int3400_notify(acpi_handle handle,
376 u32 event,
377 void *data)
378{
379 struct int3400_thermal_priv *priv = data;
380 char *thermal_prop[5];
381 int therm_event;
382
383 if (!priv)
384 return;
385
386 switch (event) {
387 case INT3400_THERMAL_TABLE_CHANGED:
388 therm_event = THERMAL_TABLE_CHANGED;
389 break;
390 case INT3400_KEEP_ALIVE:
391 therm_event = THERMAL_EVENT_KEEP_ALIVE;
392 break;
393 case INT3400_ODVP_CHANGED:
394 evaluate_odvp(priv);
395 therm_event = THERMAL_DEVICE_POWER_CAPABILITY_CHANGED;
396 break;
397 default:
398
399 return;
400 }
401
402 thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", priv->thermal->type);
403 thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", priv->thermal->temperature);
404 thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=");
405 thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", therm_event);
406 thermal_prop[4] = NULL;
407 kobject_uevent_env(&priv->thermal->device.kobj, KOBJ_CHANGE, thermal_prop);
408}
409
410static int int3400_thermal_get_temp(struct thermal_zone_device *thermal,
411 int *temp)
412{
413 *temp = 20 * 1000;
414 return 0;
415}
416
417static int int3400_thermal_change_mode(struct thermal_zone_device *thermal,
418 enum thermal_device_mode mode)
419{
420 struct int3400_thermal_priv *priv = thermal->devdata;
421 int result = 0;
422
423 if (!priv)
424 return -EINVAL;
425
426 if (mode != thermal->mode)
427 result = int3400_thermal_run_osc(priv->adev->handle,
428 priv->current_uuid_index,
429 mode == THERMAL_DEVICE_ENABLED);
430
431
432 evaluate_odvp(priv);
433
434 return result;
435}
436
437static struct thermal_zone_device_ops int3400_thermal_ops = {
438 .get_temp = int3400_thermal_get_temp,
439 .change_mode = int3400_thermal_change_mode,
440};
441
442static struct thermal_zone_params int3400_thermal_params = {
443 .governor_name = "user_space",
444 .no_hwmon = true,
445};
446
447static void int3400_setup_gddv(struct int3400_thermal_priv *priv)
448{
449 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
450 union acpi_object *obj;
451 acpi_status status;
452
453 status = acpi_evaluate_object(priv->adev->handle, "GDDV", NULL,
454 &buffer);
455 if (ACPI_FAILURE(status) || !buffer.length)
456 return;
457
458 obj = buffer.pointer;
459 if (obj->type != ACPI_TYPE_PACKAGE || obj->package.count != 1
460 || obj->package.elements[0].type != ACPI_TYPE_BUFFER) {
461 kfree(buffer.pointer);
462 return;
463 }
464
465 priv->data_vault = kmemdup(obj->package.elements[0].buffer.pointer,
466 obj->package.elements[0].buffer.length,
467 GFP_KERNEL);
468 bin_attr_data_vault.private = priv->data_vault;
469 bin_attr_data_vault.size = obj->package.elements[0].buffer.length;
470 kfree(buffer.pointer);
471}
472
473static int int3400_thermal_probe(struct platform_device *pdev)
474{
475 struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
476 struct int3400_thermal_priv *priv;
477 int result;
478
479 if (!adev)
480 return -ENODEV;
481
482 priv = kzalloc(sizeof(struct int3400_thermal_priv), GFP_KERNEL);
483 if (!priv)
484 return -ENOMEM;
485
486 priv->pdev = pdev;
487 priv->adev = adev;
488
489 result = int3400_thermal_get_uuids(priv);
490
491
492 if (result && result != -ENODEV)
493 goto free_priv;
494
495 priv->current_uuid_index = -1;
496
497 result = acpi_parse_art(priv->adev->handle, &priv->art_count,
498 &priv->arts, true);
499 if (result)
500 dev_dbg(&pdev->dev, "_ART table parsing error\n");
501
502 result = acpi_parse_trt(priv->adev->handle, &priv->trt_count,
503 &priv->trts, true);
504 if (result)
505 dev_dbg(&pdev->dev, "_TRT table parsing error\n");
506
507 platform_set_drvdata(pdev, priv);
508
509 int3400_setup_gddv(priv);
510
511 evaluate_odvp(priv);
512
513 priv->thermal = thermal_zone_device_register("INT3400 Thermal", 0, 0,
514 priv, &int3400_thermal_ops,
515 &int3400_thermal_params, 0, 0);
516 if (IS_ERR(priv->thermal)) {
517 result = PTR_ERR(priv->thermal);
518 goto free_art_trt;
519 }
520
521 priv->rel_misc_dev_res = acpi_thermal_rel_misc_device_add(
522 priv->adev->handle);
523
524 result = sysfs_create_group(&pdev->dev.kobj, &uuid_attribute_group);
525 if (result)
526 goto free_rel_misc;
527
528 if (acpi_has_method(priv->adev->handle, "IMOK")) {
529 result = sysfs_create_group(&pdev->dev.kobj, &imok_attribute_group);
530 if (result)
531 goto free_imok;
532 }
533
534 if (priv->data_vault) {
535 result = sysfs_create_group(&pdev->dev.kobj,
536 &data_attribute_group);
537 if (result)
538 goto free_uuid;
539 }
540
541 result = acpi_install_notify_handler(
542 priv->adev->handle, ACPI_DEVICE_NOTIFY, int3400_notify,
543 (void *)priv);
544 if (result)
545 goto free_sysfs;
546
547 return 0;
548
549free_sysfs:
550 cleanup_odvp(priv);
551 if (priv->data_vault) {
552 sysfs_remove_group(&pdev->dev.kobj, &data_attribute_group);
553 kfree(priv->data_vault);
554 }
555free_uuid:
556 sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group);
557free_imok:
558 sysfs_remove_group(&pdev->dev.kobj, &imok_attribute_group);
559free_rel_misc:
560 if (!priv->rel_misc_dev_res)
561 acpi_thermal_rel_misc_device_remove(priv->adev->handle);
562 thermal_zone_device_unregister(priv->thermal);
563free_art_trt:
564 kfree(priv->trts);
565 kfree(priv->arts);
566free_priv:
567 kfree(priv);
568 return result;
569}
570
571static int int3400_thermal_remove(struct platform_device *pdev)
572{
573 struct int3400_thermal_priv *priv = platform_get_drvdata(pdev);
574
575 acpi_remove_notify_handler(
576 priv->adev->handle, ACPI_DEVICE_NOTIFY,
577 int3400_notify);
578
579 cleanup_odvp(priv);
580
581 if (!priv->rel_misc_dev_res)
582 acpi_thermal_rel_misc_device_remove(priv->adev->handle);
583
584 if (priv->data_vault)
585 sysfs_remove_group(&pdev->dev.kobj, &data_attribute_group);
586 sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group);
587 sysfs_remove_group(&pdev->dev.kobj, &imok_attribute_group);
588 thermal_zone_device_unregister(priv->thermal);
589 kfree(priv->data_vault);
590 kfree(priv->trts);
591 kfree(priv->arts);
592 kfree(priv);
593 return 0;
594}
595
596static const struct acpi_device_id int3400_thermal_match[] = {
597 {"INT3400", 0},
598 {"INTC1040", 0},
599 {"INTC1041", 0},
600 {}
601};
602
603MODULE_DEVICE_TABLE(acpi, int3400_thermal_match);
604
605static struct platform_driver int3400_thermal_driver = {
606 .probe = int3400_thermal_probe,
607 .remove = int3400_thermal_remove,
608 .driver = {
609 .name = "int3400 thermal",
610 .acpi_match_table = ACPI_PTR(int3400_thermal_match),
611 },
612};
613
614module_platform_driver(int3400_thermal_driver);
615
616MODULE_DESCRIPTION("INT3400 Thermal driver");
617MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
618MODULE_LICENSE("GPL");
619
