OpenCloudOS-Kernel/drivers/thermal/int340x_thermal/int3400_thermal.c

272 lines
6.0 KiB
C

/*
* INT3400 thermal driver
*
* Copyright (C) 2014, Intel Corporation
* Authors: Zhang Rui <rui.zhang@intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/thermal.h>
#include "acpi_thermal_rel.h"
enum int3400_thermal_uuid {
INT3400_THERMAL_PASSIVE_1,
INT3400_THERMAL_PASSIVE_2,
INT3400_THERMAL_ACTIVE,
INT3400_THERMAL_CRITICAL,
INT3400_THERMAL_COOLING_MODE,
INT3400_THERMAL_MAXIMUM_UUID,
};
static u8 *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
"42A441D6-AE6A-462b-A84B-4A8CE79027D3",
"9E04115A-AE87-4D1C-9500-0F3E340BFE75",
"3A95C389-E4B8-4629-A526-C52C88626BAE",
"97C68AE7-15FA-499c-B8C9-5DA81D606E0A",
"16CAF1B7-DD38-40ed-B1C1-1B8A1913D531",
};
struct int3400_thermal_priv {
struct acpi_device *adev;
struct thermal_zone_device *thermal;
int mode;
int art_count;
struct art *arts;
int trt_count;
struct trt *trts;
u8 uuid_bitmap;
int rel_misc_dev_res;
};
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++) {
u8 uuid[16];
acpi_str_to_uuid(int3400_thermal_uuids[j], uuid);
if (!strncmp(uuid, objb->buffer.pointer, 16)) {
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 int int3400_thermal_get_temp(struct thermal_zone_device *thermal,
unsigned long *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)
{
struct int3400_thermal_priv *priv = thermal->devdata;
if (!priv)
return -EINVAL;
*mode = priv->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;
bool enable;
int result = 0;
if (!priv)
return -EINVAL;
if (mode == THERMAL_DEVICE_ENABLED)
enable = true;
else if (mode == THERMAL_DEVICE_DISABLED)
enable = false;
else
return -EINVAL;
if (enable != priv->mode) {
priv->mode = enable;
/* currently, only PASSIVE COOLING is supported */
result = int3400_thermal_run_osc(priv->adev->handle,
INT3400_THERMAL_PASSIVE_1, enable);
}
return result;
}
static struct thermal_zone_device_ops int3400_thermal_ops = {
.get_temp = int3400_thermal_get_temp,
};
static struct thermal_zone_params int3400_thermal_params = {
.governor_name = "user_space",
.no_hwmon = true,
};
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->adev = adev;
result = int3400_thermal_get_uuids(priv);
if (result)
goto free_priv;
result = acpi_parse_art(priv->adev->handle, &priv->art_count,
&priv->arts, true);
if (result)
goto free_priv;
result = acpi_parse_trt(priv->adev->handle, &priv->trt_count,
&priv->trts, true);
if (result)
goto free_art;
platform_set_drvdata(pdev, priv);
if (priv->uuid_bitmap & 1 << INT3400_THERMAL_PASSIVE_1) {
int3400_thermal_ops.get_mode = int3400_thermal_get_mode;
int3400_thermal_ops.set_mode = int3400_thermal_set_mode;
}
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_trt;
}
priv->rel_misc_dev_res = acpi_thermal_rel_misc_device_add(
priv->adev->handle);
return 0;
free_trt:
kfree(priv->trts);
free_art:
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);
if (!priv->rel_misc_dev_res)
acpi_thermal_rel_misc_device_remove(priv->adev->handle);
thermal_zone_device_unregister(priv->thermal);
kfree(priv->trts);
kfree(priv->arts);
kfree(priv);
return 0;
}
static const struct acpi_device_id int3400_thermal_match[] = {
{"INT3400", 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",
.owner = THIS_MODULE,
.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");