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/*
* Copyright (C) 2006-2016, Marvell International Ltd.
*
* This software file (the "File") is distributed by Marvell International
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
* (the "License"). You may use, redistribute and/or modify this File in
* accordance with the terms and conditions of the License, a copy of which
* is available by writing to the Free Software Foundation, Inc.
*
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
* this warranty disclaimer.
*/
/* Description: This file implements thermal framework related functions. */
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/thermal.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include "sysadpt.h"
#include "dev.h"
#include "fwcmd.h"
#include "thermal.h"
static int
mwl_thermal_get_max_throttle_state(struct thermal_cooling_device *cdev,
unsigned long *state)
{
*state = SYSADPT_THERMAL_THROTTLE_MAX;
return 0;
}
static int
mwl_thermal_get_cur_throttle_state(struct thermal_cooling_device *cdev,
unsigned long *state)
{
struct mwl_priv *priv = cdev->devdata;
*state = priv->throttle_state;
return 0;
}
static int
mwl_thermal_set_cur_throttle_state(struct thermal_cooling_device *cdev,
unsigned long throttle_state)
{
struct mwl_priv *priv = cdev->devdata;
if (throttle_state > SYSADPT_THERMAL_THROTTLE_MAX) {
wiphy_warn(priv->hw->wiphy,
"throttle state %ld is exceeding the limit %d\n",
throttle_state, SYSADPT_THERMAL_THROTTLE_MAX);
return -EINVAL;
}
priv->throttle_state = throttle_state;
mwl_thermal_set_throttling(priv);
return 0;
}
static struct thermal_cooling_device_ops mwl_thermal_ops = {
.get_max_state = mwl_thermal_get_max_throttle_state,
.get_cur_state = mwl_thermal_get_cur_throttle_state,
.set_cur_state = mwl_thermal_set_cur_throttle_state,
};
static ssize_t mwl_thermal_show_temp(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct mwl_priv *priv = dev_get_drvdata(dev);
int ret, temperature;
ret = mwl_fwcmd_get_temp(priv->hw, &priv->temperature);
if (ret) {
wiphy_warn(priv->hw->wiphy, "failed: can't get temperature\n");
goto out;
}
temperature = priv->temperature;
/* display in millidegree celcius */
ret = snprintf(buf, PAGE_SIZE, "%d\n", temperature * 1000);
out:
return ret;
}
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, mwl_thermal_show_temp,
NULL, 0);
static struct attribute *mwl_hwmon_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(mwl_hwmon);
void mwl_thermal_set_throttling(struct mwl_priv *priv)
{
u32 period, duration, enabled;
int ret;
period = priv->quiet_period;
duration = (period * priv->throttle_state) / 100;
enabled = duration ? 1 : 0;
ret = mwl_fwcmd_quiet_mode(priv->hw, enabled, period,
duration, SYSADPT_QUIET_START_OFFSET);
if (ret) {
wiphy_warn(priv->hw->wiphy,
"failed: period %u duarion %u enabled %u ret %d\n",
period, duration, enabled, ret);
}
}
int mwl_thermal_register(struct mwl_priv *priv)
{
struct thermal_cooling_device *cdev;
struct device *hwmon_dev;
int ret;
if (priv->chip_type != MWL8897)
return 0;
cdev = thermal_cooling_device_register("mwlwifi_thermal", priv,
&mwl_thermal_ops);
if (IS_ERR(cdev)) {
wiphy_err(priv->hw->wiphy,
"failed to setup thermal device result: %ld\n",
PTR_ERR(cdev));
return -EINVAL;
}
ret = sysfs_create_link(&priv->dev->kobj, &cdev->device.kobj,
"cooling_device");
if (ret) {
wiphy_err(priv->hw->wiphy,
"failed to create cooling device symlink\n");
goto err_cooling_destroy;
}
priv->cdev = cdev;
priv->quiet_period = SYSADPT_QUIET_PERIOD_DEFAULT;
if (!config_enabled(CONFIG_HWMON))
return 0;
hwmon_dev =
devm_hwmon_device_register_with_groups(priv->dev,
"mwlwifi_hwmon", priv,
mwl_hwmon_groups);
if (IS_ERR(hwmon_dev)) {
wiphy_err(priv->hw->wiphy,
"failed to register hwmon device: %ld\n",
PTR_ERR(hwmon_dev));
ret = -EINVAL;
goto err_remove_link;
}
return 0;
err_remove_link:
sysfs_remove_link(&priv->dev->kobj, "cooling_device");
err_cooling_destroy:
thermal_cooling_device_unregister(cdev);
return ret;
}
void mwl_thermal_unregister(struct mwl_priv *priv)
{
if (priv->chip_type != MWL8897)
return;
sysfs_remove_link(&priv->dev->kobj, "cooling_device");
thermal_cooling_device_unregister(priv->cdev);
}
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