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/*
* Copyright (C) 2012 Texas Instruments, Inc
*
* 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.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
#include <linux/thermal.h>
static struct cool_data {
int freq_cnt;
unsigned long *freq_list;
unsigned long state;
struct thermal_cooling_device *cdev;
} cd;
static int sgxfreq_get_max_state(struct thermal_cooling_device *cdev,
unsigned long *state)
{
*state = cd.freq_cnt - 1;
return 0;
}
static int sgxfreq_get_cur_state(struct thermal_cooling_device *cdev,
unsigned long *state)
{
*state = cd.state;
return 0;
}
static int sgxfreq_set_cur_state(struct thermal_cooling_device *cdev,
unsigned long state)
{
int freq_max_index, freq_limit_index;
freq_max_index = cd.freq_cnt - 1;
freq_limit_index = freq_max_index - (unsigned int)state;
if (freq_limit_index < 0)
freq_limit_index = 0;
sgxfreq_set_freq_limit(cd.freq_list[freq_limit_index]);
cd.state = state;
return 0;
}
static const struct thermal_cooling_device_ops sgxfreq_cooling_ops = {
.get_max_state = sgxfreq_get_max_state,
.get_cur_state = sgxfreq_get_cur_state,
.set_cur_state = sgxfreq_set_cur_state,
};
int cool_init(void)
{
int ret;
struct thermal_zone_device *tz;
cd.freq_cnt = sgxfreq_get_freq_list(&cd.freq_list);
if (!cd.freq_cnt || !cd.freq_list)
return -EINVAL;
cd.cdev = thermal_cooling_device_register("gpu", (void *)NULL, &sgxfreq_cooling_ops);
if(IS_ERR(cd.cdev)) {
pr_err("sgxfreq: Error while regeistering cooling device: %ld\n", PTR_ERR(cd.cdev));
return -1;
}
tz = thermal_zone_get_zone_by_name("gpu");
if(IS_ERR(tz)) {
pr_err("sgxfreq: Error while trying to obtain zone device: %ld\n", PTR_ERR(tz));
return -1;
}
ret = thermal_zone_bind_cooling_device(tz, 0, cd.cdev, THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
if (ret)
{
pr_err("sgxfreq: Error binding cooling device: %d\n", ret);
}
return 0;
}
void cool_deinit(void)
{
thermal_cooling_device_unregister(cd.cdev);
}
#else //if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
#include <linux/thermal_framework.h>
static int cool_device(struct thermal_dev *dev, int cooling_level);
static struct cool_data {
int freq_cnt;
unsigned long *freq_list;
} cd;
static struct thermal_dev_ops cool_dev_ops = {
.cool_device = cool_device,
};
static struct thermal_dev cool_dev = {
.name = "gpu_cooling.0",
.domain_name = "gpu",
.dev_ops = &cool_dev_ops,
};
static struct thermal_dev case_cool_dev = {
.name = "gpu_cooling.1",
.domain_name = "case",
.dev_ops = &cool_dev_ops,
};
static unsigned int gpu_cooling_level;
#if defined(CONFIG_CASE_TEMP_GOVERNOR)
static unsigned int case_cooling_level;
#endif
int cool_init(void)
{
int ret;
cd.freq_cnt = sgxfreq_get_freq_list(&cd.freq_list);
if (!cd.freq_cnt || !cd.freq_list)
return -EINVAL;
ret = thermal_cooling_dev_register(&cool_dev);
if (ret)
return ret;
return thermal_cooling_dev_register(&case_cool_dev);
}
void cool_deinit(void)
{
thermal_cooling_dev_unregister(&cool_dev);
thermal_cooling_dev_unregister(&case_cool_dev);
}
static int cool_device(struct thermal_dev *dev, int cooling_level)
{
int freq_max_index, freq_limit_index;
#if defined(CONFIG_CASE_TEMP_GOVERNOR)
if (!strcmp(dev->domain_name, "case"))
{
int tmp = 0;
tmp = cooling_level - case_subzone_number;
if (tmp < 0)
tmp = 0;
case_cooling_level = tmp;
}
else
#endif
{
gpu_cooling_level = cooling_level;
}
freq_max_index = cd.freq_cnt - 1;
#if defined(CONFIG_CASE_TEMP_GOVERNOR)
if (case_cooling_level > gpu_cooling_level)
{
freq_limit_index = freq_max_index - case_cooling_level;
}
else
#endif
{
freq_limit_index = freq_max_index - gpu_cooling_level;
}
if (freq_limit_index < 0)
freq_limit_index = 0;
sgxfreq_set_freq_limit(cd.freq_list[freq_limit_index]);
return 0;
}
#endif //if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
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