1 // SPDX-License-Identifier: GPL-2.0-only
3 * INT3400 thermal driver
5 * Copyright (C) 2014, Intel Corporation
6 * Authors: Zhang Rui <rui.zhang@intel.com>
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"
15 #define INT3400_THERMAL_TABLE_CHANGED 0x83
16 #define INT3400_ODVP_CHANGED 0x88
17 #define INT3400_KEEP_ALIVE 0xA0
19 enum 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,
33 static 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",
48 struct int3400_thermal_priv {
49 struct acpi_device *adev;
50 struct platform_device *pdev;
51 struct thermal_zone_device *thermal;
58 int current_uuid_index;
62 struct odvp_attr *odvp_attrs;
65 static int evaluate_odvp(struct int3400_thermal_priv *priv);
69 struct int3400_thermal_priv *priv;
70 struct kobj_attribute attr;
73 static ssize_t data_vault_read(struct file *file, struct kobject *kobj,
74 struct bin_attribute *attr, char *buf, loff_t off, size_t count)
76 memcpy(buf, attr->private + off, count);
80 static BIN_ATTR_RO(data_vault, 0);
82 static struct bin_attribute *data_attributes[] = {
87 static ssize_t imok_store(struct device *dev, struct device_attribute *attr,
88 const char *buf, size_t count)
90 struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
94 ret = kstrtouint(buf, 10, &input);
97 status = acpi_execute_simple_method(priv->adev->handle, "IMOK", input);
98 if (ACPI_FAILURE(status))
104 static DEVICE_ATTR_WO(imok);
106 static struct attribute *imok_attr[] = {
111 static const struct attribute_group imok_attribute_group = {
115 static const struct attribute_group data_attribute_group = {
116 .bin_attrs = data_attributes,
119 static ssize_t available_uuids_show(struct device *dev,
120 struct device_attribute *attr,
123 struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
127 if (!priv->uuid_bitmap)
128 return sprintf(buf, "UNKNOWN\n");
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],
136 int3400_thermal_uuids[i]);
142 static ssize_t current_uuid_show(struct device *dev,
143 struct device_attribute *devattr, char *buf)
145 struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
147 if (priv->current_uuid_index == -1)
148 return sprintf(buf, "INVALID\n");
150 return sprintf(buf, "%s\n",
151 int3400_thermal_uuids[priv->current_uuid_index]);
154 static ssize_t current_uuid_store(struct device *dev,
155 struct device_attribute *attr,
156 const char *buf, size_t count)
158 struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
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)) {
165 * If we have a list of supported UUIDs, make sure
166 * this one is supported.
168 if (priv->uuid_bitmap &&
169 !(priv->uuid_bitmap & (1 << i)))
172 priv->current_uuid_index = i;
180 static DEVICE_ATTR_RW(current_uuid);
181 static DEVICE_ATTR_RO(available_uuids);
182 static struct attribute *uuid_attrs[] = {
183 &dev_attr_available_uuids.attr,
184 &dev_attr_current_uuid.attr,
188 static const struct attribute_group uuid_attribute_group = {
193 static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv)
195 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL};
196 union acpi_object *obja, *objb;
201 status = acpi_evaluate_object(priv->adev->handle, "IDSP", NULL, &buf);
202 if (ACPI_FAILURE(status))
205 obja = (union acpi_object *)buf.pointer;
206 if (obja->type != ACPI_TYPE_PACKAGE) {
211 for (i = 0; i < obja->package.count; i++) {
212 objb = &obja->package.elements[i];
213 if (objb->type != ACPI_TYPE_BUFFER) {
218 /* UUID must be 16 bytes */
219 if (objb->buffer.length != 16) {
224 for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) {
227 guid_parse(int3400_thermal_uuids[j], &guid);
228 if (guid_equal((guid_t *)objb->buffer.pointer, &guid)) {
229 priv->uuid_bitmap |= (1 << j);
240 static int int3400_thermal_run_osc(acpi_handle handle,
241 enum int3400_thermal_uuid uuid, bool enable)
246 struct acpi_osc_context context = {
252 if (uuid < 0 || uuid >= INT3400_THERMAL_MAXIMUM_UUID)
255 context.uuid_str = int3400_thermal_uuids[uuid];
257 buf[OSC_QUERY_DWORD] = 0;
258 buf[OSC_SUPPORT_DWORD] = enable;
260 context.cap.pointer = buf;
262 status = acpi_run_osc(handle, &context);
263 if (ACPI_SUCCESS(status)) {
264 ret = *((u32 *)(context.ret.pointer + 4));
270 kfree(context.ret.pointer);
275 static ssize_t odvp_show(struct kobject *kobj, struct kobj_attribute *attr,
278 struct odvp_attr *odvp_attr;
280 odvp_attr = container_of(attr, struct odvp_attr, attr);
282 return sprintf(buf, "%d\n", odvp_attr->priv->odvp[odvp_attr->odvp]);
285 static void cleanup_odvp(struct int3400_thermal_priv *priv)
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);
295 kfree(priv->odvp_attrs);
298 priv->odvp_count = 0;
301 static int evaluate_odvp(struct int3400_thermal_priv *priv)
303 struct acpi_buffer odvp = { ACPI_ALLOCATE_BUFFER, NULL };
304 union acpi_object *obj = NULL;
308 status = acpi_evaluate_object(priv->adev->handle, "ODVP", NULL, &odvp);
309 if (ACPI_FAILURE(status)) {
315 if (obj->type != ACPI_TYPE_PACKAGE) {
320 if (priv->odvp == NULL) {
321 priv->odvp_count = obj->package.count;
322 priv->odvp = kmalloc_array(priv->odvp_count, sizeof(int),
330 if (priv->odvp_attrs == NULL) {
331 priv->odvp_attrs = kcalloc(priv->odvp_count,
332 sizeof(struct odvp_attr),
334 if (!priv->odvp_attrs) {
338 for (i = 0; i < priv->odvp_count; i++) {
339 struct odvp_attr *odvp = &priv->odvp_attrs[i];
341 sysfs_attr_init(&odvp->attr.attr);
344 odvp->attr.attr.name = kasprintf(GFP_KERNEL,
347 if (!odvp->attr.attr.name) {
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,
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;
375 static void int3400_notify(acpi_handle handle,
379 struct int3400_thermal_priv *priv = data;
380 char *thermal_prop[5];
387 case INT3400_THERMAL_TABLE_CHANGED:
388 therm_event = THERMAL_TABLE_CHANGED;
390 case INT3400_KEEP_ALIVE:
391 therm_event = THERMAL_EVENT_KEEP_ALIVE;
393 case INT3400_ODVP_CHANGED:
395 therm_event = THERMAL_DEVICE_POWER_CAPABILITY_CHANGED;
398 /* Ignore unknown notification codes sent to INT3400 device */
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);
410 static int int3400_thermal_get_temp(struct thermal_zone_device *thermal,
413 *temp = 20 * 1000; /* faked temp sensor with 20C */
417 static int int3400_thermal_change_mode(struct thermal_zone_device *thermal,
418 enum thermal_device_mode mode)
420 struct int3400_thermal_priv *priv = thermal->devdata;
426 if (mode != thermal->mode)
427 result = int3400_thermal_run_osc(priv->adev->handle,
428 priv->current_uuid_index,
429 mode == THERMAL_DEVICE_ENABLED);
437 static struct thermal_zone_device_ops int3400_thermal_ops = {
438 .get_temp = int3400_thermal_get_temp,
439 .change_mode = int3400_thermal_change_mode,
442 static struct thermal_zone_params int3400_thermal_params = {
443 .governor_name = "user_space",
447 static void int3400_setup_gddv(struct int3400_thermal_priv *priv)
449 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
450 union acpi_object *obj;
453 status = acpi_evaluate_object(priv->adev->handle, "GDDV", NULL,
455 if (ACPI_FAILURE(status) || !buffer.length)
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);
465 priv->data_vault = kmemdup(obj->package.elements[0].buffer.pointer,
466 obj->package.elements[0].buffer.length,
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);
473 static int int3400_thermal_probe(struct platform_device *pdev)
475 struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
476 struct int3400_thermal_priv *priv;
482 priv = kzalloc(sizeof(struct int3400_thermal_priv), GFP_KERNEL);
489 result = int3400_thermal_get_uuids(priv);
491 /* Missing IDSP isn't fatal */
492 if (result && result != -ENODEV)
495 priv->current_uuid_index = -1;
497 result = acpi_parse_art(priv->adev->handle, &priv->art_count,
500 dev_dbg(&pdev->dev, "_ART table parsing error\n");
502 result = acpi_parse_trt(priv->adev->handle, &priv->trt_count,
505 dev_dbg(&pdev->dev, "_TRT table parsing error\n");
507 platform_set_drvdata(pdev, priv);
509 int3400_setup_gddv(priv);
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);
521 priv->rel_misc_dev_res = acpi_thermal_rel_misc_device_add(
524 result = sysfs_create_group(&pdev->dev.kobj, &uuid_attribute_group);
528 if (acpi_has_method(priv->adev->handle, "IMOK")) {
529 result = sysfs_create_group(&pdev->dev.kobj, &imok_attribute_group);
534 if (priv->data_vault) {
535 result = sysfs_create_group(&pdev->dev.kobj,
536 &data_attribute_group);
541 result = acpi_install_notify_handler(
542 priv->adev->handle, ACPI_DEVICE_NOTIFY, int3400_notify,
551 if (priv->data_vault) {
552 sysfs_remove_group(&pdev->dev.kobj, &data_attribute_group);
553 kfree(priv->data_vault);
556 sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group);
558 sysfs_remove_group(&pdev->dev.kobj, &imok_attribute_group);
560 if (!priv->rel_misc_dev_res)
561 acpi_thermal_rel_misc_device_remove(priv->adev->handle);
562 thermal_zone_device_unregister(priv->thermal);
571 static int int3400_thermal_remove(struct platform_device *pdev)
573 struct int3400_thermal_priv *priv = platform_get_drvdata(pdev);
575 acpi_remove_notify_handler(
576 priv->adev->handle, ACPI_DEVICE_NOTIFY,
581 if (!priv->rel_misc_dev_res)
582 acpi_thermal_rel_misc_device_remove(priv->adev->handle);
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);
596 static const struct acpi_device_id int3400_thermal_match[] = {
603 MODULE_DEVICE_TABLE(acpi, int3400_thermal_match);
605 static struct platform_driver int3400_thermal_driver = {
606 .probe = int3400_thermal_probe,
607 .remove = int3400_thermal_remove,
609 .name = "int3400 thermal",
610 .acpi_match_table = ACPI_PTR(int3400_thermal_match),
614 module_platform_driver(int3400_thermal_driver);
616 MODULE_DESCRIPTION("INT3400 Thermal driver");
617 MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
618 MODULE_LICENSE("GPL");