// SPDX-License-Identifier: GPL-2.0-only
/*
* INT3400 thermal driver
*
* Copyright (C) 2014, Intel Corporation
* Authors: Zhang Rui <[email protected]>
*/
#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
#define INT3400_KEEP_ALIVE 0xA0
#define INT3400_FAKE_TEMP (20 * 1000) /* faked temp sensor with 20C */
enum int3400_thermal_uuid {
INT3400_THERMAL_ACTIVE = 0,
INT3400_THERMAL_PASSIVE_1,
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] = {
"3A95C389-E4B8-4629-A526-C52C88626BAE",
"42A441D6-AE6A-462b-A84B-4A8CE79027D3",
"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;
u32 uuid_bitmap;
int rel_misc_dev_res;
int current_uuid_index;
char *data_vault;
int odvp_count;
int *odvp;
u32 os_uuid_mask;
int production_mode;
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 device_attribute attr;
};
static BIN_ATTR_SIMPLE_RO(data_vault);
static struct bin_attribute *data_attributes[] = {
&bin_attr_data_vault,
NULL,
};
static ssize_t imok_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
acpi_status status;
int input, ret;
ret = kstrtouint(buf, 10, &input);
if (ret)
return ret;
status = acpi_execute_simple_method(priv->adev->handle, "IMOK", input);
if (ACPI_FAILURE(status))
return -EIO;
return count;
}
static DEVICE_ATTR_WO(imok);
static struct attribute *imok_attr[] = {
&dev_attr_imok.attr,
NULL
};
static const struct attribute_group imok_attribute_group = {
.attrs = imok_attr,
};
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))
length += sysfs_emit_at(buf, 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);
int i, length = 0;
if (priv->current_uuid_index > 0)
return sprintf(buf, "%s\n",
int3400_thermal_uuids[priv->current_uuid_index]);
for (i = 0; i <= INT3400_THERMAL_CRITICAL; i++) {
if (priv->os_uuid_mask & BIT(i))
length += sysfs_emit_at(buf, length, "%s\n", int3400_thermal_uuids[i]);
}
if (length)
return length;
return sprintf(buf, "INVALID\n");
}
static int int3400_thermal_run_osc(acpi_handle handle, char *uuid_str, int *enable)
{
u32 ret, buf[2];
acpi_status status;
int result = 0;
struct acpi_osc_context context = {
.uuid_str = uuid_str,
.rev = 1,
.cap.length = 8,
.cap.pointer = buf,
};
buf[OSC_QUERY_DWORD] = 0;
buf[OSC_SUPPORT_DWORD] = *enable;
status = acpi_run_osc(handle, &context);
if (ACPI_SUCCESS(status)) {
ret = *((u32 *)(context.ret.pointer + 4));
if (ret != *enable)
result = -EPERM;
kfree(context.ret.pointer);
} else
result = -EPERM;
return result;
}
static int set_os_uuid_mask(struct int3400_thermal_priv *priv, u32 mask)
{
int cap = 0;
/*
* Capability bits:
* Bit 0: set to 1 to indicate DPTF is active
* Bi1 1: set to 1 to active cooling is supported by user space daemon
* Bit 2: set to 1 to passive cooling is supported by user space daemon
* Bit 3: set to 1 to critical trip is handled by user space daemon
*/
if (mask)
cap = (priv->os_uuid_mask << 1) | 0x01;
return int3400_thermal_run_osc(priv->adev->handle,
"b23ba85d-c8b7-3542-88de-8de2ffcfd698",
&cap);
}
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 ret, 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 & BIT(i)) {
priv->current_uuid_index = i;
return count;
}
/*
* There is support of only 3 policies via the new
* _OSC to inform OS capability:
* INT3400_THERMAL_ACTIVE
* INT3400_THERMAL_PASSIVE_1
* INT3400_THERMAL_CRITICAL
*/
if (i > INT3400_THERMAL_CRITICAL)
return -EINVAL;
priv->os_uuid_mask |= BIT(i);
break;
}
}
if (priv->os_uuid_mask) {
ret = set_os_uuid_mask(priv, priv->os_uuid_mask);
if (ret)
return ret;
}
return count;
}
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 ssize_t production_mode_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
return sysfs_emit(buf, "%d\n", priv->production_mode);
}
static DEVICE_ATTR_RO(production_mode);
static int production_mode_init(struct int3400_thermal_priv *priv)
{
unsigned long long mode;
acpi_status status;
int ret;
priv->production_mode = -1;
status = acpi_evaluate_integer(priv->adev->handle, "DCFG", NULL, &mode);
/* If the method is not present, this is not an error */
if (ACPI_FAILURE(status))
return 0;
ret = sysfs_create_file(&priv->pdev->dev.kobj, &dev_attr_production_mode.attr);
if (ret)
return ret;
priv->production_mode = mode;
return 0;
}
static void production_mode_exit(struct int3400_thermal_priv *priv)
{
if (priv->production_mode >= 0)
sysfs_remove_file(&priv->pdev->dev.kobj, &dev_attr_production_mode.attr);
}
static ssize_t odvp_show(struct device *dev, struct device_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;
struct device *dev;
char *thermal_prop[5];
int therm_event;
if (!priv)
return;
switch (event) {
case INT3400_THERMAL_TABLE_CHANGED:
therm_event = THERMAL_TABLE_CHANGED;
break;
case INT3400_KEEP_ALIVE:
therm_event = THERMAL_EVENT_KEEP_ALIVE;
break;
case INT3400_ODVP_CHANGED:
evaluate_odvp(priv);
therm_event = THERMAL_DEVICE_POWER_CAPABILITY_CHANGED;
break;
default:
/* Ignore unknown notification codes sent to INT3400 device */
return;
}
dev = thermal_zone_device(priv->thermal);
thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", thermal_zone_device_type(priv->thermal));
thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", INT3400_FAKE_TEMP);
thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=");
thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", therm_event);
thermal_prop[4] = NULL;
kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, thermal_prop);
kfree(thermal_prop[0]);
kfree(thermal_prop[1]);
kfree(thermal_prop[2]);
kfree(thermal_prop[3]);
}
static int int3400_thermal_get_temp(struct thermal_zone_device *thermal,
int *temp)
{
*temp = INT3400_FAKE_TEMP;
return 0;
}
static int int3400_thermal_change_mode(struct thermal_zone_device *thermal,
enum thermal_device_mode mode)
{
struct int3400_thermal_priv *priv = thermal_zone_device_priv(thermal);
int result = 0;
int enabled;
if (!priv)
return -EINVAL;
enabled = mode == THERMAL_DEVICE_ENABLED;
if (priv->os_uuid_mask) {
if (!enabled) {
priv->os_uuid_mask = 0;
result = set_os_uuid_mask(priv, priv->os_uuid_mask);
}
goto eval_odvp;
}
if (priv->current_uuid_index < 0 ||
priv->current_uuid_index >= INT3400_THERMAL_MAXIMUM_UUID)
return -EINVAL;
result = int3400_thermal_run_osc(priv->adev->handle,
int3400_thermal_uuids[priv->current_uuid_index],
&enabled);
eval_odvp:
evaluate_odvp(priv);
return result;
}
static struct thermal_zone_device_ops int3400_thermal_ops = {
.get_temp = int3400_thermal_get_temp,
.change_mode = int3400_thermal_change_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)
goto out_free;
priv->data_vault = kmemdup(obj->package.elements[0].buffer.pointer,
obj->package.elements[0].buffer.length,
GFP_KERNEL);
if (ZERO_OR_NULL_PTR(priv->data_vault))
goto out_free;
bin_attr_data_vault.private = priv->data_vault;
bin_attr_data_vault.size = obj->package.elements[0].buffer.length;
out_free:
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(*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_tripless_zone_device_register("INT3400 Thermal", priv,
&int3400_thermal_ops,
&int3400_thermal_params);
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 (acpi_has_method(priv->adev->handle, "IMOK")) {
result = sysfs_create_group(&pdev->dev.kobj, &imok_attribute_group);
if (result)
goto free_imok;
}
if (!ZERO_OR_NULL_PTR(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;
result = production_mode_init(priv);
if (result)
goto free_notify;
return 0;
free_notify:
acpi_remove_notify_handler(priv->adev->handle, ACPI_DEVICE_NOTIFY,
int3400_notify);
free_sysfs:
cleanup_odvp(priv);
if (!ZERO_OR_NULL_PTR(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_imok:
sysfs_remove_group(&pdev->dev.kobj, &imok_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 void int3400_thermal_remove(struct platform_device *pdev)
{
struct int3400_thermal_priv *priv = platform_get_drvdata(pdev);
production_mode_exit(priv);
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 (!ZERO_OR_NULL_PTR(priv->data_vault))
sysfs_remove_group(&pdev->dev.kobj, &data_attribute_group);
sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group);
sysfs_remove_group(&pdev->dev.kobj, &imok_attribute_group);
thermal_zone_device_unregister(priv->thermal);
kfree(priv->data_vault);
kfree(priv->trts);
kfree(priv->arts);
kfree(priv);
}
static const struct acpi_device_id int3400_thermal_match[] = {
{"INT3400", 0},
{"INTC1040", 0},
{"INTC1041", 0},
{"INTC1042", 0},
{"INTC1068", 0},
{"INTC10A0", 0},
{}
};
MODULE_DEVICE_TABLE(acpi, int3400_thermal_match);
static struct platform_driver int3400_thermal_driver = {
.probe = int3400_thermal_probe,
.remove_new = 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 <[email protected]>");
MODULE_LICENSE("GPL");
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