blob: ab598645e76c02b3e457c9f27dfb772492aee1dd [file] [log] [blame]
/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only 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.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/msm_tsens.h>
#include <linux/workqueue.h>
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/msm_tsens.h>
#include <linux/msm_thermal.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/sysfs.h>
#include <linux/types.h>
#include <linux/android_alarm.h>
#include <mach/cpufreq.h>
#include <mach/rpm-regulator.h>
#include <mach/rpm-regulator-smd.h>
#include <linux/regulator/consumer.h>
#define MAX_RAILS 5
static struct msm_thermal_data msm_thermal_info;
static uint32_t limited_max_freq = MSM_CPUFREQ_NO_LIMIT;
static struct delayed_work check_temp_work;
static bool core_control_enabled;
static uint32_t cpus_offlined;
static DEFINE_MUTEX(core_control_mutex);
static uint32_t wakeup_ms;
static struct alarm thermal_rtc;
static struct kobject *tt_kobj;
static struct work_struct timer_work;
static int enabled;
static int rails_cnt;
static int psm_rails_cnt;
static int limit_idx;
static int limit_idx_low;
static int limit_idx_high;
static int max_tsens_num;
static struct cpufreq_frequency_table *table;
static uint32_t usefreq;
static int freq_table_get;
static bool vdd_rstr_enabled;
static bool vdd_rstr_nodes_called;
static bool vdd_rstr_probed;
static bool psm_enabled;
static bool psm_nodes_called;
static bool psm_probed;
static int *tsens_id_map;
static DEFINE_MUTEX(vdd_rstr_mutex);
static DEFINE_MUTEX(psm_mutex);
struct rail {
const char *name;
uint32_t freq_req;
uint32_t min_level;
uint32_t num_levels;
int32_t curr_level;
uint32_t levels[3];
struct kobj_attribute value_attr;
struct kobj_attribute level_attr;
struct regulator *reg;
struct attribute_group attr_gp;
};
struct psm_rail {
const char *name;
uint8_t init;
uint8_t mode;
struct kobj_attribute mode_attr;
struct rpm_regulator *reg;
struct attribute_group attr_gp;
};
static struct psm_rail *psm_rails;
static struct rail *rails;
struct vdd_rstr_enable {
struct kobj_attribute ko_attr;
uint32_t enabled;
};
/* For SMPS only*/
enum PMIC_SW_MODE {
PMIC_AUTO_MODE = RPM_REGULATOR_MODE_AUTO,
PMIC_IPEAK_MODE = RPM_REGULATOR_MODE_IPEAK,
PMIC_PWM_MODE = RPM_REGULATOR_MODE_HPM,
};
#define VDD_RES_RO_ATTRIB(_rail, ko_attr, j, _name) \
ko_attr.attr.name = __stringify(_name); \
ko_attr.attr.mode = 444; \
ko_attr.show = vdd_rstr_reg_##_name##_show; \
ko_attr.store = NULL; \
sysfs_attr_init(&ko_attr.attr); \
_rail.attr_gp.attrs[j] = &ko_attr.attr;
#define VDD_RES_RW_ATTRIB(_rail, ko_attr, j, _name) \
ko_attr.attr.name = __stringify(_name); \
ko_attr.attr.mode = 644; \
ko_attr.show = vdd_rstr_reg_##_name##_show; \
ko_attr.store = vdd_rstr_reg_##_name##_store; \
sysfs_attr_init(&ko_attr.attr); \
_rail.attr_gp.attrs[j] = &ko_attr.attr;
#define VDD_RSTR_ENABLE_FROM_ATTRIBS(attr) \
(container_of(attr, struct vdd_rstr_enable, ko_attr));
#define VDD_RSTR_REG_VALUE_FROM_ATTRIBS(attr) \
(container_of(attr, struct rail, value_attr));
#define VDD_RSTR_REG_LEVEL_FROM_ATTRIBS(attr) \
(container_of(attr, struct rail, level_attr));
#define PSM_RW_ATTRIB(_rail, ko_attr, j, _name) \
ko_attr.attr.name = __stringify(_name); \
ko_attr.attr.mode = 644; \
ko_attr.show = psm_reg_##_name##_show; \
ko_attr.store = psm_reg_##_name##_store; \
sysfs_attr_init(&ko_attr.attr); \
_rail.attr_gp.attrs[j] = &ko_attr.attr;
#define PSM_REG_MODE_FROM_ATTRIBS(attr) \
(container_of(attr, struct psm_rail, mode_attr));
/* If freq table exists, then we can send freq request */
static int check_freq_table(void)
{
int ret = 0;
struct cpufreq_frequency_table *table = NULL;
table = cpufreq_frequency_get_table(0);
if (!table) {
pr_debug("%s: error reading cpufreq table\n", __func__);
return -EINVAL;
}
freq_table_get = 1;
return ret;
}
static int update_cpu_min_freq_all(uint32_t min)
{
int cpu = 0;
int ret = 0;
struct cpufreq_policy *policy = NULL;
if (!freq_table_get) {
ret = check_freq_table();
if (ret) {
pr_err("%s:Fail to get freq table\n", __func__);
return ret;
}
}
/* If min is larger than allowed max */
if (min != MSM_CPUFREQ_NO_LIMIT &&
min > table[limit_idx_high].frequency)
min = table[limit_idx_high].frequency;
for_each_possible_cpu(cpu) {
ret = msm_cpufreq_set_freq_limits(cpu, min, limited_max_freq);
if (ret) {
pr_err("%s:Fail to set limits for cpu%d\n",
__func__, cpu);
return ret;
}
if (cpu_online(cpu)) {
policy = cpufreq_cpu_get(cpu);
if (!policy)
continue;
cpufreq_driver_target(policy, policy->cur,
CPUFREQ_RELATION_L);
cpufreq_cpu_put(policy);
}
}
return ret;
}
static int vdd_restriction_apply_freq(struct rail *r, int level)
{
int ret = 0;
if (level == r->curr_level)
return ret;
/* level = -1: disable, level = 0,1,2..n: enable */
if (level == -1) {
ret = update_cpu_min_freq_all(r->min_level);
if (ret)
return ret;
else
r->curr_level = -1;
} else if (level >= 0 && level < (r->num_levels)) {
ret = update_cpu_min_freq_all(r->levels[level]);
if (ret)
return ret;
else
r->curr_level = level;
} else {
pr_err("level input:%d is not within range\n", level);
return -EINVAL;
}
return ret;
}
static int vdd_restriction_apply_voltage(struct rail *r, int level)
{
int ret = 0;
if (r->reg == NULL) {
pr_info("Do not have regulator handle:%s, can't apply vdd\n",
r->name);
return -EFAULT;
}
if (level == r->curr_level)
return ret;
/* level = -1: disable, level = 0,1,2..n: enable */
if (level == -1) {
ret = regulator_set_voltage(r->reg, r->min_level,
r->levels[r->num_levels - 1]);
if (!ret)
r->curr_level = -1;
} else if (level >= 0 && level < (r->num_levels)) {
ret = regulator_set_voltage(r->reg, r->levels[level],
r->levels[r->num_levels - 1]);
if (!ret)
r->curr_level = level;
} else {
pr_err("level input:%d is not within range\n", level);
return -EINVAL;
}
return ret;
}
/* Setting all rails the same mode */
static int psm_set_mode_all(int mode)
{
int i = 0;
int fail_cnt = 0;
int ret = 0;
for (i = 0; i < psm_rails_cnt; i++) {
if (psm_rails[i].mode != mode) {
ret = rpm_regulator_set_mode(psm_rails[i].reg, mode);
if (ret) {
pr_err("Cannot set mode:%d for %s",
mode, psm_rails[i].name);
fail_cnt++;
} else
psm_rails[i].mode = mode;
}
}
return fail_cnt ? (-EFAULT) : ret;
}
static int vdd_rstr_en_show(
struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
struct vdd_rstr_enable *en = VDD_RSTR_ENABLE_FROM_ATTRIBS(attr);
return snprintf(buf, PAGE_SIZE, "%d\n", en->enabled);
}
static ssize_t vdd_rstr_en_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
int ret = 0;
int i = 0;
uint8_t en_cnt = 0;
uint8_t dis_cnt = 0;
uint32_t val = 0;
struct kernel_param kp;
struct vdd_rstr_enable *en = VDD_RSTR_ENABLE_FROM_ATTRIBS(attr);
mutex_lock(&vdd_rstr_mutex);
kp.arg = &val;
ret = param_set_bool(buf, &kp);
if (ret) {
pr_err("Invalid input %s for enabled\n", buf);
goto done_vdd_rstr_en;
}
if ((val == 0) && (en->enabled == 0))
goto done_vdd_rstr_en;
for (i = 0; i < rails_cnt; i++) {
if (rails[i].freq_req == 1 && freq_table_get)
ret = vdd_restriction_apply_freq(&rails[i],
(val) ? 0 : -1);
else
ret = vdd_restriction_apply_voltage(&rails[i],
(val) ? 0 : -1);
/*
* Even if fail to set one rail, still try to set the
* others. Continue the loop
*/
if (ret)
pr_err("Set vdd restriction for %s failed\n",
rails[i].name);
else {
if (val)
en_cnt++;
else
dis_cnt++;
}
}
/* As long as one rail is enabled, vdd rstr is enabled */
if (val && en_cnt)
en->enabled = 1;
else if (!val && (dis_cnt == rails_cnt))
en->enabled = 0;
done_vdd_rstr_en:
mutex_unlock(&vdd_rstr_mutex);
return count;
}
static struct vdd_rstr_enable vdd_rstr_en = {
.ko_attr.attr.name = __stringify(enabled),
.ko_attr.attr.mode = 644,
.ko_attr.show = vdd_rstr_en_show,
.ko_attr.store = vdd_rstr_en_store,
.enabled = 1,
};
static struct attribute *vdd_rstr_en_attribs[] = {
&vdd_rstr_en.ko_attr.attr,
NULL,
};
static struct attribute_group vdd_rstr_en_attribs_gp = {
.attrs = vdd_rstr_en_attribs,
};
static int vdd_rstr_reg_value_show(
struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
int val = 0;
struct rail *reg = VDD_RSTR_REG_VALUE_FROM_ATTRIBS(attr);
/* -1:disabled, -2:fail to get regualtor handle */
if (reg->curr_level < 0)
val = reg->curr_level;
else
val = reg->levels[reg->curr_level];
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static int vdd_rstr_reg_level_show(
struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
struct rail *reg = VDD_RSTR_REG_LEVEL_FROM_ATTRIBS(attr);
return snprintf(buf, PAGE_SIZE, "%d\n", reg->curr_level);
}
static ssize_t vdd_rstr_reg_level_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
int ret = 0;
int val = 0;
struct rail *reg = VDD_RSTR_REG_LEVEL_FROM_ATTRIBS(attr);
mutex_lock(&vdd_rstr_mutex);
if (vdd_rstr_en.enabled == 0)
goto done_store_level;
ret = kstrtouint(buf, 10, &val);
if (ret) {
pr_err("Invalid input %s for level\n", buf);
goto done_store_level;
}
if (val < 0 || val > reg->num_levels - 1) {
pr_err(" Invalid number %d for level\n", val);
goto done_store_level;
}
if (val != reg->curr_level) {
if (reg->freq_req == 1 && freq_table_get)
update_cpu_min_freq_all(reg->levels[val]);
else {
ret = vdd_restriction_apply_voltage(reg, val);
if (ret) {
pr_err( \
"Set vdd restriction for regulator %s failed\n",
reg->name);
goto done_store_level;
}
}
reg->curr_level = val;
}
done_store_level:
mutex_unlock(&vdd_rstr_mutex);
return count;
}
static int psm_reg_mode_show(
struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
struct psm_rail *reg = PSM_REG_MODE_FROM_ATTRIBS(attr);
return snprintf(buf, PAGE_SIZE, "%d\n", reg->mode);
}
static ssize_t psm_reg_mode_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
int ret = 0;
int val = 0;
struct psm_rail *reg = PSM_REG_MODE_FROM_ATTRIBS(attr);
mutex_lock(&psm_mutex);
ret = kstrtoint(buf, 10, &val);
if (ret) {
pr_err("Invalid input %s for mode\n", buf);
goto done_psm_store;
}
if ((val != PMIC_PWM_MODE) && (val != PMIC_AUTO_MODE)) {
pr_err(" Invalid number %d for mode\n", val);
goto done_psm_store;
}
if (val != reg->mode) {
ret = rpm_regulator_set_mode(reg->reg, val);
if (ret) {
pr_err( \
"Fail to set PMIC SW Mode:%d for %s\n",
val, reg->name);
goto done_psm_store;
}
reg->mode = val;
}
done_psm_store:
mutex_unlock(&psm_mutex);
return count;
}
static int check_sensor_id(int sensor_id)
{
int i = 0;
bool hw_id_found;
int ret = 0;
for (i = 0; i < max_tsens_num; i++) {
if (sensor_id == tsens_id_map[i]) {
hw_id_found = true;
break;
}
}
if (!hw_id_found) {
pr_err("%s: Invalid sensor hw id :%d\n", __func__, sensor_id);
return -EINVAL;
}
return ret;
}
static int create_sensor_id_map(void)
{
int i = 0;
int ret = 0;
tsens_id_map = kzalloc(sizeof(int) * max_tsens_num,
GFP_KERNEL);
if (!tsens_id_map) {
pr_err("%s: Cannot allocate memory for tsens_id_map\n",
__func__);
return -ENOMEM;
}
for (i = 0; i < max_tsens_num; i++) {
ret = tsens_get_hw_id_mapping(i, &tsens_id_map[i]);
/* If return -ENXIO, hw_id is default in sequence */
if (ret) {
if (ret == -ENXIO) {
tsens_id_map[i] = i;
ret = 0;
} else {
pr_err( \
"%s: Failed to get hw id for sw id %d\n",
__func__, i);
goto fail;
}
}
}
return ret;
fail:
kfree(tsens_id_map);
return ret;
}
/* 1:enable, 0:disable */
static int vdd_restriction_apply_all(int en)
{
int i = 0;
int en_cnt = 0;
int dis_cnt = 0;
int fail_cnt = 0;
int ret = 0;
for (i = 0; i < rails_cnt; i++) {
if (rails[i].freq_req == 1 && freq_table_get)
ret = vdd_restriction_apply_freq(&rails[i],
en ? 0 : -1);
else
ret = vdd_restriction_apply_voltage(&rails[i],
en ? 0 : -1);
if (ret) {
pr_err("Cannot set voltage for %s", rails[i].name);
fail_cnt++;
} else {
if (en)
en_cnt++;
else
dis_cnt++;
}
}
/* As long as one rail is enabled, vdd rstr is enabled */
if (en && en_cnt)
vdd_rstr_en.enabled = 1;
else if (!en && (dis_cnt == rails_cnt))
vdd_rstr_en.enabled = 0;
/*
* Check fail_cnt again to make sure all of the rails are applied
* restriction successfully or not
*/
if (fail_cnt)
return -EFAULT;
return ret;
}
static int msm_thermal_get_freq_table(void)
{
int ret = 0;
int i = 0;
table = cpufreq_frequency_get_table(0);
if (table == NULL) {
pr_debug("%s: error reading cpufreq table\n", KBUILD_MODNAME);
ret = -EINVAL;
goto fail;
}
while (table[i].frequency != CPUFREQ_TABLE_END)
i++;
limit_idx_low = 0;
limit_idx_high = limit_idx = i - 1;
BUG_ON(limit_idx_high <= 0 || limit_idx_high <= limit_idx_low);
fail:
return ret;
}
static int update_cpu_max_freq(int cpu, uint32_t max_freq)
{
int ret = 0;
ret = msm_cpufreq_set_freq_limits(cpu, MSM_CPUFREQ_NO_LIMIT, max_freq);
if (ret)
return ret;
limited_max_freq = max_freq;
if (max_freq != MSM_CPUFREQ_NO_LIMIT)
pr_info("%s: Limiting cpu%d max frequency to %d\n",
KBUILD_MODNAME, cpu, max_freq);
else
pr_info("%s: Max frequency reset for cpu%d\n",
KBUILD_MODNAME, cpu);
if (cpu_online(cpu)) {
struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
if (!policy)
return ret;
ret = cpufreq_driver_target(policy, policy->cur,
CPUFREQ_RELATION_H);
cpufreq_cpu_put(policy);
}
return ret;
}
static void __cpuinit do_core_control(long temp)
{
int i = 0;
int ret = 0;
if (!core_control_enabled)
return;
mutex_lock(&core_control_mutex);
if (msm_thermal_info.core_control_mask &&
temp >= msm_thermal_info.core_limit_temp_degC) {
for (i = num_possible_cpus(); i > 0; i--) {
if (!(msm_thermal_info.core_control_mask & BIT(i)))
continue;
if (cpus_offlined & BIT(i) && !cpu_online(i))
continue;
pr_info("%s: Set Offline: CPU%d Temp: %ld\n",
KBUILD_MODNAME, i, temp);
ret = cpu_down(i);
if (ret)
pr_err("%s: Error %d offline core %d\n",
KBUILD_MODNAME, ret, i);
cpus_offlined |= BIT(i);
break;
}
} else if (msm_thermal_info.core_control_mask && cpus_offlined &&
temp <= (msm_thermal_info.core_limit_temp_degC -
msm_thermal_info.core_temp_hysteresis_degC)) {
for (i = 0; i < num_possible_cpus(); i++) {
if (!(cpus_offlined & BIT(i)))
continue;
cpus_offlined &= ~BIT(i);
pr_info("%s: Allow Online CPU%d Temp: %ld\n",
KBUILD_MODNAME, i, temp);
/*
* If this core is already online, then bring up the
* next offlined core.
*/
if (cpu_online(i))
continue;
ret = cpu_up(i);
if (ret)
pr_err("%s: Error %d online core %d\n",
KBUILD_MODNAME, ret, i);
break;
}
}
mutex_unlock(&core_control_mutex);
}
static int do_vdd_restriction(void)
{
struct tsens_device tsens_dev;
long temp = 0;
int ret = 0;
int i = 0;
int dis_cnt = 0;
if (!vdd_rstr_enabled)
return ret;
if (usefreq && !freq_table_get) {
if (check_freq_table())
return ret;
}
mutex_lock(&vdd_rstr_mutex);
for (i = 0; i < max_tsens_num; i++) {
tsens_dev.sensor_num = tsens_id_map[i];
ret = tsens_get_temp(&tsens_dev, &temp);
if (ret) {
pr_debug("%s: Unable to read TSENS sensor %d\n",
__func__, tsens_dev.sensor_num);
dis_cnt++;
continue;
}
if (temp <= msm_thermal_info.vdd_rstr_temp_degC) {
ret = vdd_restriction_apply_all(1);
if (ret) {
pr_err( \
"Enable vdd rstr votlage for all failed\n");
goto exit;
}
goto exit;
} else if (temp > msm_thermal_info.vdd_rstr_temp_hyst_degC)
dis_cnt++;
}
if (dis_cnt == max_tsens_num) {
ret = vdd_restriction_apply_all(0);
if (ret) {
pr_err("Disable vdd rstr votlage for all failed\n");
goto exit;
}
}
exit:
mutex_unlock(&vdd_rstr_mutex);
return ret;
}
static int do_psm(void)
{
struct tsens_device tsens_dev;
long temp = 0;
int ret = 0;
int i = 0;
int auto_cnt = 0;
mutex_lock(&psm_mutex);
for (i = 0; i < max_tsens_num; i++) {
tsens_dev.sensor_num = tsens_id_map[i];
ret = tsens_get_temp(&tsens_dev, &temp);
if (ret) {
pr_debug("%s: Unable to read TSENS sensor %d\n",
__func__, tsens_dev.sensor_num);
auto_cnt++;
continue;
}
/*
* As long as one sensor is above the threshold, set PWM mode
* on all rails, and loop stops. Set auto mode when all rails
* are below thershold
*/
if (temp > msm_thermal_info.psm_temp_degC) {
ret = psm_set_mode_all(PMIC_PWM_MODE);
if (ret) {
pr_err("Set pwm mode for all failed\n");
goto exit;
}
break;
} else if (temp <= msm_thermal_info.psm_temp_hyst_degC)
auto_cnt++;
}
if (auto_cnt == max_tsens_num) {
ret = psm_set_mode_all(PMIC_AUTO_MODE);
if (ret) {
pr_err("Set auto mode for all failed\n");
goto exit;
}
}
exit:
mutex_unlock(&psm_mutex);
return ret;
}
static void __cpuinit do_freq_control(long temp)
{
int ret = 0;
int cpu = 0;
uint32_t max_freq = limited_max_freq;
if (temp >= msm_thermal_info.limit_temp_degC) {
if (limit_idx == limit_idx_low)
return;
limit_idx -= msm_thermal_info.freq_step;
if (limit_idx < limit_idx_low)
limit_idx = limit_idx_low;
max_freq = table[limit_idx].frequency;
} else if (temp < msm_thermal_info.limit_temp_degC -
msm_thermal_info.temp_hysteresis_degC) {
if (limit_idx == limit_idx_high)
return;
limit_idx += msm_thermal_info.freq_step;
if (limit_idx >= limit_idx_high) {
limit_idx = limit_idx_high;
max_freq = MSM_CPUFREQ_NO_LIMIT;
} else
max_freq = table[limit_idx].frequency;
}
if (max_freq == limited_max_freq)
return;
/* Update new limits */
for_each_possible_cpu(cpu) {
if (!(msm_thermal_info.freq_control_mask & BIT(cpu)))
continue;
ret = update_cpu_max_freq(cpu, max_freq);
if (ret)
pr_debug(
"%s: Unable to limit cpu%d max freq to %d\n",
KBUILD_MODNAME, cpu, max_freq);
}
}
static void __cpuinit check_temp(struct work_struct *work)
{
static int limit_init;
struct tsens_device tsens_dev;
long temp = 0;
int ret = 0;
tsens_dev.sensor_num = msm_thermal_info.sensor_id;
ret = tsens_get_temp(&tsens_dev, &temp);
if (ret) {
pr_debug("%s: Unable to read TSENS sensor %d\n",
KBUILD_MODNAME, tsens_dev.sensor_num);
goto reschedule;
}
if (!limit_init) {
ret = msm_thermal_get_freq_table();
if (ret)
goto reschedule;
else
limit_init = 1;
}
do_core_control(temp);
do_vdd_restriction();
do_psm();
do_freq_control(temp);
reschedule:
if (enabled)
schedule_delayed_work(&check_temp_work,
msecs_to_jiffies(msm_thermal_info.poll_ms));
}
static int __cpuinit msm_thermal_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
if (action == CPU_UP_PREPARE || action == CPU_UP_PREPARE_FROZEN) {
if (core_control_enabled &&
(msm_thermal_info.core_control_mask & BIT(cpu)) &&
(cpus_offlined & BIT(cpu))) {
pr_info(
"%s: Preventing cpu%d from coming online.\n",
KBUILD_MODNAME, cpu);
return NOTIFY_BAD;
}
}
return NOTIFY_OK;
}
static struct notifier_block __refdata msm_thermal_cpu_notifier = {
.notifier_call = msm_thermal_cpu_callback,
};
static void thermal_rtc_setup(void)
{
ktime_t wakeup_time;
ktime_t curr_time;
curr_time = alarm_get_elapsed_realtime();
wakeup_time = ktime_add_us(curr_time,
(wakeup_ms * USEC_PER_MSEC));
alarm_start_range(&thermal_rtc, wakeup_time,
wakeup_time);
pr_debug("%s: Current Time: %ld %ld, Alarm set to: %ld %ld\n",
KBUILD_MODNAME,
ktime_to_timeval(curr_time).tv_sec,
ktime_to_timeval(curr_time).tv_usec,
ktime_to_timeval(wakeup_time).tv_sec,
ktime_to_timeval(wakeup_time).tv_usec);
}
static void timer_work_fn(struct work_struct *work)
{
sysfs_notify(tt_kobj, NULL, "wakeup_ms");
}
static void thermal_rtc_callback(struct alarm *al)
{
struct timeval ts;
ts = ktime_to_timeval(alarm_get_elapsed_realtime());
schedule_work(&timer_work);
pr_debug("%s: Time on alarm expiry: %ld %ld\n", KBUILD_MODNAME,
ts.tv_sec, ts.tv_usec);
}
/*
* We will reset the cpu frequencies limits here. The core online/offline
* status will be carried over to the process stopping the msm_thermal, as
* we dont want to online a core and bring in the thermal issues.
*/
static void __cpuinit disable_msm_thermal(void)
{
int cpu = 0;
/* make sure check_temp is no longer running */
cancel_delayed_work(&check_temp_work);
flush_scheduled_work();
if (limited_max_freq == MSM_CPUFREQ_NO_LIMIT)
return;
for_each_possible_cpu(cpu) {
update_cpu_max_freq(cpu, MSM_CPUFREQ_NO_LIMIT);
}
}
static int __cpuinit set_enabled(const char *val, const struct kernel_param *kp)
{
int ret = 0;
ret = param_set_bool(val, kp);
if (!enabled)
disable_msm_thermal();
else
pr_info("%s: no action for enabled = %d\n",
KBUILD_MODNAME, enabled);
pr_info("%s: enabled = %d\n", KBUILD_MODNAME, enabled);
return ret;
}
static struct kernel_param_ops module_ops = {
.set = set_enabled,
.get = param_get_bool,
};
module_param_cb(enabled, &module_ops, &enabled, 0644);
MODULE_PARM_DESC(enabled, "enforce thermal limit on cpu");
/* Call with core_control_mutex locked */
static int __cpuinit update_offline_cores(int val)
{
int cpu = 0;
int ret = 0;
cpus_offlined = msm_thermal_info.core_control_mask & val;
if (!core_control_enabled)
return 0;
for_each_possible_cpu(cpu) {
if (!(cpus_offlined & BIT(cpu)))
continue;
if (!cpu_online(cpu))
continue;
ret = cpu_down(cpu);
if (ret)
pr_err("%s: Unable to offline cpu%d\n",
KBUILD_MODNAME, cpu);
}
return ret;
}
static ssize_t show_cc_enabled(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", core_control_enabled);
}
static ssize_t __cpuinit store_cc_enabled(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
int ret = 0;
int val = 0;
mutex_lock(&core_control_mutex);
ret = kstrtoint(buf, 10, &val);
if (ret) {
pr_err("%s: Invalid input %s\n", KBUILD_MODNAME, buf);
goto done_store_cc;
}
if (core_control_enabled == !!val)
goto done_store_cc;
core_control_enabled = !!val;
if (core_control_enabled) {
pr_info("%s: Core control enabled\n", KBUILD_MODNAME);
register_cpu_notifier(&msm_thermal_cpu_notifier);
update_offline_cores(cpus_offlined);
} else {
pr_info("%s: Core control disabled\n", KBUILD_MODNAME);
unregister_cpu_notifier(&msm_thermal_cpu_notifier);
}
done_store_cc:
mutex_unlock(&core_control_mutex);
return count;
}
static ssize_t show_cpus_offlined(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", cpus_offlined);
}
static ssize_t __cpuinit store_cpus_offlined(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
int ret = 0;
uint32_t val = 0;
mutex_lock(&core_control_mutex);
ret = kstrtouint(buf, 10, &val);
if (ret) {
pr_err("%s: Invalid input %s\n", KBUILD_MODNAME, buf);
goto done_cc;
}
if (enabled) {
pr_err("%s: Ignoring request; polling thread is enabled.\n",
KBUILD_MODNAME);
goto done_cc;
}
if (cpus_offlined == val)
goto done_cc;
update_offline_cores(val);
done_cc:
mutex_unlock(&core_control_mutex);
return count;
}
static __cpuinitdata struct kobj_attribute cc_enabled_attr =
__ATTR(enabled, 0644, show_cc_enabled, store_cc_enabled);
static __cpuinitdata struct kobj_attribute cpus_offlined_attr =
__ATTR(cpus_offlined, 0644, show_cpus_offlined, store_cpus_offlined);
static __cpuinitdata struct attribute *cc_attrs[] = {
&cc_enabled_attr.attr,
&cpus_offlined_attr.attr,
NULL,
};
static __cpuinitdata struct attribute_group cc_attr_group = {
.attrs = cc_attrs,
};
static ssize_t show_wakeup_ms(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", wakeup_ms);
}
static ssize_t store_wakeup_ms(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
int ret;
ret = kstrtouint(buf, 10, &wakeup_ms);
if (ret) {
pr_err("%s: Trying to set invalid wakeup timer\n",
KBUILD_MODNAME);
return ret;
}
if (wakeup_ms > 0) {
thermal_rtc_setup();
pr_debug("%s: Timer started for %ums\n", KBUILD_MODNAME,
wakeup_ms);
} else {
ret = alarm_cancel(&thermal_rtc);
if (ret)
pr_debug("%s: Timer canceled\n", KBUILD_MODNAME);
else
pr_debug("%s: No active timer present to cancel\n",
KBUILD_MODNAME);
}
return count;
}
static __cpuinitdata struct kobj_attribute timer_attr =
__ATTR(wakeup_ms, 0644, show_wakeup_ms, store_wakeup_ms);
static __cpuinitdata struct attribute *tt_attrs[] = {
&timer_attr.attr,
NULL,
};
static __cpuinitdata struct attribute_group tt_attr_group = {
.attrs = tt_attrs,
};
static __init int msm_thermal_add_cc_nodes(void)
{
struct kobject *module_kobj = NULL;
struct kobject *cc_kobj = NULL;
int ret = 0;
module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!module_kobj) {
pr_err("%s: cannot find kobject for module\n",
KBUILD_MODNAME);
ret = -ENOENT;
goto done_cc_nodes;
}
cc_kobj = kobject_create_and_add("core_control", module_kobj);
if (!cc_kobj) {
pr_err("%s: cannot create core control kobj\n",
KBUILD_MODNAME);
ret = -ENOMEM;
goto done_cc_nodes;
}
ret = sysfs_create_group(cc_kobj, &cc_attr_group);
if (ret) {
pr_err("%s: cannot create group\n", KBUILD_MODNAME);
goto done_cc_nodes;
}
return 0;
done_cc_nodes:
if (cc_kobj)
kobject_del(cc_kobj);
return ret;
}
static __init int msm_thermal_add_timer_nodes(void)
{
struct kobject *module_kobj = NULL;
int ret = 0;
module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!module_kobj) {
pr_err("%s: cannot find kobject for module\n",
KBUILD_MODNAME);
ret = -ENOENT;
goto failed;
}
tt_kobj = kobject_create_and_add("thermal_timer", module_kobj);
if (!tt_kobj) {
pr_err("%s: cannot create timer kobj\n",
KBUILD_MODNAME);
ret = -ENOMEM;
goto failed;
}
ret = sysfs_create_group(tt_kobj, &tt_attr_group);
if (ret) {
pr_err("%s: cannot create group\n", KBUILD_MODNAME);
goto failed;
}
return 0;
failed:
if (tt_kobj)
kobject_del(tt_kobj);
return ret;
}
int __devinit msm_thermal_init(struct msm_thermal_data *pdata)
{
int ret = 0;
BUG_ON(!pdata);
tsens_get_max_sensor_num(&max_tsens_num);
memcpy(&msm_thermal_info, pdata, sizeof(struct msm_thermal_data));
if (create_sensor_id_map())
return -EINVAL;
if (check_sensor_id(msm_thermal_info.sensor_id))
return -EINVAL;
enabled = 1;
core_control_enabled = 1;
INIT_DELAYED_WORK(&check_temp_work, check_temp);
schedule_delayed_work(&check_temp_work, 0);
register_cpu_notifier(&msm_thermal_cpu_notifier);
return ret;
}
static int vdd_restriction_reg_init(struct platform_device *pdev)
{
int ret = 0;
int i;
for (i = 0; i < rails_cnt; i++) {
if (rails[i].freq_req == 1) {
usefreq |= BIT(i);
check_freq_table();
/*
* Restrict frequency by default until we have made
* our first temp reading
*/
if (freq_table_get)
ret = vdd_restriction_apply_freq(&rails[i], 0);
else
pr_info("%s:Defer vdd rstr freq init\n",
__func__);
} else {
rails[i].reg = devm_regulator_get(&pdev->dev,
rails[i].name);
if (IS_ERR_OR_NULL(rails[i].reg)) {
ret = PTR_ERR(rails[i].reg);
if (ret != -EPROBE_DEFER) {
pr_err( \
"%s, could not get regulator: %s\n",
rails[i].name, __func__);
rails[i].reg = NULL;
rails[i].curr_level = -2;
return ret;
}
return ret;
}
/*
* Restrict votlage by default until we have made
* our first temp reading
*/
ret = vdd_restriction_apply_voltage(&rails[i], 0);
}
}
return ret;
}
static int psm_reg_init(struct platform_device *pdev)
{
int ret = 0;
int i = 0;
int j = 0;
for (i = 0; i < psm_rails_cnt; i++) {
psm_rails[i].reg = rpm_regulator_get(&pdev->dev,
psm_rails[i].name);
if (IS_ERR_OR_NULL(psm_rails[i].reg)) {
ret = PTR_ERR(psm_rails[i].reg);
if (ret != -EPROBE_DEFER) {
pr_err("%s, could not get rpm regulator: %s\n",
psm_rails[i].name, __func__);
psm_rails[i].reg = NULL;
goto psm_reg_exit;
}
return ret;
}
/* Apps default vote for PWM mode */
psm_rails[i].init = PMIC_PWM_MODE;
ret = rpm_regulator_set_mode(psm_rails[i].reg,
psm_rails[i].init);
if (ret) {
pr_err("%s: Cannot set PMIC PWM mode\n", __func__);
return ret;
} else
psm_rails[i].mode = PMIC_PWM_MODE;
}
return ret;
psm_reg_exit:
if (ret) {
for (j = 0; j < i; j++) {
if (psm_rails[j].reg != NULL)
rpm_regulator_put(psm_rails[j].reg);
}
}
return ret;
}
static int msm_thermal_add_vdd_rstr_nodes(void)
{
struct kobject *module_kobj = NULL;
struct kobject *vdd_rstr_kobj = NULL;
struct kobject *vdd_rstr_reg_kobj[MAX_RAILS] = {0};
int rc = 0;
int i = 0;
if (!vdd_rstr_probed) {
vdd_rstr_nodes_called = true;
return rc;
}
if (vdd_rstr_probed && rails_cnt == 0)
return rc;
module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!module_kobj) {
pr_err("%s: cannot find kobject for module %s\n",
__func__, KBUILD_MODNAME);
rc = -ENOENT;
goto thermal_sysfs_add_exit;
}
vdd_rstr_kobj = kobject_create_and_add("vdd_restriction", module_kobj);
if (!vdd_rstr_kobj) {
pr_err("%s: cannot create vdd_restriction kobject\n", __func__);
rc = -ENOMEM;
goto thermal_sysfs_add_exit;
}
rc = sysfs_create_group(vdd_rstr_kobj, &vdd_rstr_en_attribs_gp);
if (rc) {
pr_err("%s: cannot create kobject attribute group\n", __func__);
rc = -ENOMEM;
goto thermal_sysfs_add_exit;
}
for (i = 0; i < rails_cnt; i++) {
vdd_rstr_reg_kobj[i] = kobject_create_and_add(rails[i].name,
vdd_rstr_kobj);
if (!vdd_rstr_reg_kobj[i]) {
pr_err("%s: cannot create for kobject for %s\n",
__func__, rails[i].name);
rc = -ENOMEM;
goto thermal_sysfs_add_exit;
}
rails[i].attr_gp.attrs = kzalloc(sizeof(struct attribute *) * 3,
GFP_KERNEL);
if (!rails[i].attr_gp.attrs) {
rc = -ENOMEM;
goto thermal_sysfs_add_exit;
}
VDD_RES_RW_ATTRIB(rails[i], rails[i].level_attr, 0, level);
VDD_RES_RO_ATTRIB(rails[i], rails[i].value_attr, 1, value);
rails[i].attr_gp.attrs[2] = NULL;
rc = sysfs_create_group(vdd_rstr_reg_kobj[i],
&rails[i].attr_gp);
if (rc) {
pr_err("%s: cannot create attribute group for %s\n",
__func__, rails[i].name);
goto thermal_sysfs_add_exit;
}
}
return rc;
thermal_sysfs_add_exit:
if (rc) {
for (i = 0; i < rails_cnt; i++) {
kobject_del(vdd_rstr_reg_kobj[i]);
kfree(rails[i].attr_gp.attrs);
}
if (vdd_rstr_kobj)
kobject_del(vdd_rstr_kobj);
}
return rc;
}
static int msm_thermal_add_psm_nodes(void)
{
struct kobject *module_kobj = NULL;
struct kobject *psm_kobj = NULL;
struct kobject *psm_reg_kobj[MAX_RAILS] = {0};
int rc = 0;
int i = 0;
if (!psm_probed) {
psm_nodes_called = true;
return rc;
}
if (psm_probed && psm_rails_cnt == 0)
return rc;
module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!module_kobj) {
pr_err("%s: cannot find kobject for module %s\n",
__func__, KBUILD_MODNAME);
rc = -ENOENT;
goto psm_node_exit;
}
psm_kobj = kobject_create_and_add("pmic_sw_mode", module_kobj);
if (!psm_kobj) {
pr_err("%s: cannot create psm kobject\n", KBUILD_MODNAME);
rc = -ENOMEM;
goto psm_node_exit;
}
for (i = 0; i < psm_rails_cnt; i++) {
psm_reg_kobj[i] = kobject_create_and_add(psm_rails[i].name,
psm_kobj);
if (!psm_reg_kobj[i]) {
pr_err("%s: cannot create for kobject for %s\n",
KBUILD_MODNAME, psm_rails[i].name);
rc = -ENOMEM;
goto psm_node_exit;
}
psm_rails[i].attr_gp.attrs = kzalloc( \
sizeof(struct attribute *) * 2, GFP_KERNEL);
if (!psm_rails[i].attr_gp.attrs) {
rc = -ENOMEM;
goto psm_node_exit;
}
PSM_RW_ATTRIB(psm_rails[i], psm_rails[i].mode_attr, 0, mode);
psm_rails[i].attr_gp.attrs[1] = NULL;
rc = sysfs_create_group(psm_reg_kobj[i], &psm_rails[i].attr_gp);
if (rc) {
pr_err("%s: cannot create attribute group for %s\n",
KBUILD_MODNAME, psm_rails[i].name);
goto psm_node_exit;
}
}
return rc;
psm_node_exit:
if (rc) {
for (i = 0; i < psm_rails_cnt; i++) {
kobject_del(psm_reg_kobj[i]);
kfree(psm_rails[i].attr_gp.attrs);
}
if (psm_kobj)
kobject_del(psm_kobj);
}
return rc;
}
static int probe_vdd_rstr(struct device_node *node,
struct msm_thermal_data *data, struct platform_device *pdev)
{
int ret = 0;
int i = 0;
int arr_size;
char *key = NULL;
struct device_node *child_node = NULL;
key = "qcom,vdd-restriction-temp";
ret = of_property_read_u32(node, key, &data->vdd_rstr_temp_degC);
if (ret)
goto read_node_fail;
key = "qcom,vdd-restriction-temp-hysteresis";
ret = of_property_read_u32(node, key, &data->vdd_rstr_temp_hyst_degC);
if (ret)
goto read_node_fail;
for_each_child_of_node(node, child_node) {
rails_cnt++;
}
if (rails_cnt == 0)
goto read_node_fail;
if (rails_cnt >= MAX_RAILS) {
pr_err("%s: Too many rails.\n", __func__);
return -EFAULT;
}
rails = kzalloc(sizeof(struct rail) * rails_cnt,
GFP_KERNEL);
if (!rails) {
pr_err("%s: Fail to allocate memory for rails.\n", __func__);
return -ENOMEM;
}
i = 0;
for_each_child_of_node(node, child_node) {
key = "qcom,vdd-rstr-reg";
ret = of_property_read_string(child_node, key, &rails[i].name);
if (ret)
goto read_node_fail;
key = "qcom,levels";
if (!of_get_property(child_node, key, &arr_size))
goto read_node_fail;
rails[i].num_levels = arr_size/sizeof(__be32);
if (rails[i].num_levels >
sizeof(rails[i].levels)/sizeof(uint32_t)) {
pr_err("%s: Array size too large\n", __func__);
return -EFAULT;
}
ret = of_property_read_u32_array(child_node, key,
rails[i].levels, rails[i].num_levels);
if (ret)
goto read_node_fail;
key = "qcom,freq-req";
rails[i].freq_req = of_property_read_bool(child_node, key);
if (rails[i].freq_req)
rails[i].min_level = MSM_CPUFREQ_NO_LIMIT;
else {
key = "qcom,min-level";
ret = of_property_read_u32(child_node, key,
&rails[i].min_level);
if (ret)
goto read_node_fail;
}
rails[i].curr_level = 0;
rails[i].reg = NULL;
i++;
}
if (rails_cnt) {
ret = vdd_restriction_reg_init(pdev);
if (ret) {
pr_info("%s:Failed to get regulators. KTM continues.\n",
__func__);
goto read_node_fail;
}
vdd_rstr_enabled = true;
}
read_node_fail:
vdd_rstr_probed = true;
if (ret) {
dev_info(&pdev->dev,
"%s:Failed reading node=%s, key=%s. KTM continues\n",
__func__, node->full_name, key);
kfree(rails);
rails_cnt = 0;
}
if (ret == -EPROBE_DEFER)
vdd_rstr_probed = false;
return ret;
}
static int probe_psm(struct device_node *node, struct msm_thermal_data *data,
struct platform_device *pdev)
{
int ret = 0;
int j = 0;
char *key = NULL;
key = "qcom,pmic-sw-mode-temp";
ret = of_property_read_u32(node, key, &data->psm_temp_degC);
if (ret)
goto read_node_fail;
key = "qcom,pmic-sw-mode-temp-hysteresis";
ret = of_property_read_u32(node, key, &data->psm_temp_hyst_degC);
if (ret)
goto read_node_fail;
key = "qcom,pmic-sw-mode-regs";
psm_rails_cnt = of_property_count_strings(node, key);
psm_rails = kzalloc(sizeof(struct psm_rail) * psm_rails_cnt,
GFP_KERNEL);
if (!psm_rails) {
pr_err("%s: Fail to allocate memory for psm rails\n", __func__);
psm_rails_cnt = 0;
return -ENOMEM;
}
for (j = 0; j < psm_rails_cnt; j++) {
ret = of_property_read_string_index(node, key, j,
&psm_rails[j].name);
if (ret)
goto read_node_fail;
}
if (psm_rails_cnt) {
ret = psm_reg_init(pdev);
if (ret) {
pr_info("%s:Failed to get regulators. KTM continues.\n",
__func__);
goto read_node_fail;
}
psm_enabled = true;
}
read_node_fail:
psm_probed = true;
if (ret) {
dev_info(&pdev->dev,
"%s:Failed reading node=%s, key=%s. KTM continues\n",
__func__, node->full_name, key);
kfree(psm_rails);
psm_rails_cnt = 0;
}
if (ret == -EPROBE_DEFER)
psm_probed = false;
return ret;
}
static int __devinit msm_thermal_dev_probe(struct platform_device *pdev)
{
int ret = 0;
char *key = NULL;
struct device_node *node = pdev->dev.of_node;
struct msm_thermal_data data;
memset(&data, 0, sizeof(struct msm_thermal_data));
key = "qcom,sensor-id";
ret = of_property_read_u32(node, key, &data.sensor_id);
if (ret)
goto fail;
key = "qcom,poll-ms";
ret = of_property_read_u32(node, key, &data.poll_ms);
if (ret)
goto fail;
key = "qcom,limit-temp";
ret = of_property_read_u32(node, key, &data.limit_temp_degC);
if (ret)
goto fail;
key = "qcom,temp-hysteresis";
ret = of_property_read_u32(node, key, &data.temp_hysteresis_degC);
if (ret)
goto fail;
key = "qcom,freq-step";
ret = of_property_read_u32(node, key, &data.freq_step);
if (ret)
goto fail;
key = "qcom,freq-control-mask";
ret = of_property_read_u32(node, key, &data.freq_control_mask);
key = "qcom,core-limit-temp";
ret = of_property_read_u32(node, key, &data.core_limit_temp_degC);
key = "qcom,core-temp-hysteresis";
ret = of_property_read_u32(node, key, &data.core_temp_hysteresis_degC);
key = "qcom,core-control-mask";
ret = of_property_read_u32(node, key, &data.core_control_mask);
/*
* Probe optional properties below. Call probe_psm before
* probe_vdd_rstr because rpm_regulator_get has to be called
* before devm_regulator_get
*/
ret = probe_psm(node, &data, pdev);
if (ret == -EPROBE_DEFER)
goto fail;
ret = probe_vdd_rstr(node, &data, pdev);
if (ret == -EPROBE_DEFER)
goto fail;
/*
* In case sysfs add nodes get called before probe function.
* Need to make sure sysfs node is created again
*/
if (psm_nodes_called) {
msm_thermal_add_psm_nodes();
psm_nodes_called = false;
}
if (vdd_rstr_nodes_called) {
msm_thermal_add_vdd_rstr_nodes();
vdd_rstr_nodes_called = false;
}
ret = msm_thermal_init(&data);
return ret;
fail:
if (ret)
pr_err("%s: Failed reading node=%s, key=%s\n",
__func__, node->full_name, key);
return ret;
}
static struct of_device_id msm_thermal_match_table[] = {
{.compatible = "qcom,msm-thermal"},
{},
};
static struct platform_driver msm_thermal_device_driver = {
.probe = msm_thermal_dev_probe,
.driver = {
.name = "msm-thermal",
.owner = THIS_MODULE,
.of_match_table = msm_thermal_match_table,
},
};
int __init msm_thermal_device_init(void)
{
return platform_driver_register(&msm_thermal_device_driver);
}
int __init msm_thermal_late_init(void)
{
msm_thermal_add_cc_nodes();
msm_thermal_add_psm_nodes();
msm_thermal_add_vdd_rstr_nodes();
alarm_init(&thermal_rtc, ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP,
thermal_rtc_callback);
INIT_WORK(&timer_work, timer_work_fn);
msm_thermal_add_timer_nodes();
return 0;
}
late_initcall(msm_thermal_late_init);