Fixed MTP to work with TWRP

drivers/thermal/samsung/exynos_thermal_common.c

@@ -0,0 +1,641 @@
+/*
+ * exynos_thermal_common.c - Samsung EXYNOS common thermal file
+ *
+ *  Copyright (C) 2013 Samsung Electronics
+ *  Amit Daniel Kachhap <amit.daniel@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <linux/cpu_cooling.h>
+#include <linux/gpu_cooling.h>
+#include <linux/isp_cooling.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/suspend.h>
+#include <linux/thermal.h>
+#include <linux/pm_qos.h>
+#include <linux/cpufreq.h>
+#include <soc/samsung/cpufreq.h>
+
+#include "exynos_thermal_common.h"
+
+unsigned long cpu_max_temp[2];
+
+struct exynos_thermal_zone {
+	enum thermal_device_mode mode;
+	struct thermal_zone_device *therm_dev;
+	struct thermal_cooling_device *cool_dev[MAX_COOLING_DEVICE];
+	unsigned int cool_dev_size;
+	struct platform_device *exynos4_dev;
+	struct thermal_sensor_conf *sensor_conf;
+	bool bind;
+};
+
+static DEFINE_MUTEX (thermal_suspend_lock);
+static bool suspended;
+static bool is_cpu_hotplugged_out;
+
+/* Get mode callback functions for thermal zone */
+static int exynos_get_mode(struct thermal_zone_device *thermal,
+			enum thermal_device_mode *mode)
+{
+	struct exynos_thermal_zone *th_zone = thermal->devdata;
+	if (th_zone)
+		*mode = th_zone->mode;
+	return 0;
+}
+
+/* Set mode callback functions for thermal zone */
+static int exynos_set_mode(struct thermal_zone_device *thermal,
+			enum thermal_device_mode mode)
+{
+	struct exynos_thermal_zone *th_zone = thermal->devdata;
+	if (!th_zone) {
+		dev_err(&thermal->device,
+			"thermal zone not registered\n");
+		return 0;
+	}
+
+	mutex_lock(&thermal->lock);
+
+	if (mode == THERMAL_DEVICE_ENABLED &&
+		!th_zone->sensor_conf->trip_data.trigger_falling)
+		thermal->polling_delay = IDLE_INTERVAL;
+	else
+		thermal->polling_delay = 0;
+
+	mutex_unlock(&thermal->lock);
+
+	th_zone->mode = mode;
+	thermal_zone_device_update(thermal);
+	dev_dbg(th_zone->sensor_conf->dev,
+		"thermal polling set for duration=%d msec\n",
+		thermal->polling_delay);
+	return 0;
+}
+
+
+/* Get trip type callback functions for thermal zone */
+static int exynos_get_trip_type(struct thermal_zone_device *thermal, int trip,
+				 enum thermal_trip_type *type)
+{
+	struct exynos_thermal_zone *th_zone = thermal->devdata;
+	int max_trip = th_zone->sensor_conf->trip_data.trip_count;
+	int trip_type;
+
+	if (trip < 0 || trip >= max_trip)
+		return -EINVAL;
+
+	trip_type = th_zone->sensor_conf->trip_data.trip_type[trip];
+
+	if (trip_type == SW_TRIP)
+		*type = THERMAL_TRIP_CRITICAL;
+	else if (trip_type == THROTTLE_ACTIVE)
+		*type = THERMAL_TRIP_ACTIVE;
+	else if (trip_type == THROTTLE_PASSIVE)
+		*type = THERMAL_TRIP_PASSIVE;
+	else
+		return -EINVAL;
+
+	return 0;
+}
+
+/* Get trip temperature callback functions for thermal zone */
+static int exynos_get_trip_temp(struct thermal_zone_device *thermal, int trip,
+				unsigned long *temp)
+{
+	struct exynos_thermal_zone *th_zone = thermal->devdata;
+	int max_trip = th_zone->sensor_conf->trip_data.trip_count;
+
+	if (trip < 0 || trip >= max_trip)
+		return -EINVAL;
+
+	*temp = th_zone->sensor_conf->trip_data.trip_val[trip];
+	/* convert the temperature into millicelsius */
+	*temp = *temp * MCELSIUS;
+
+	return 0;
+}
+
+/* Get critical temperature callback functions for thermal zone */
+static int exynos_get_crit_temp(struct thermal_zone_device *thermal,
+				unsigned long *temp)
+{
+	struct exynos_thermal_zone *th_zone = thermal->devdata;
+	int max_trip = th_zone->sensor_conf->trip_data.trip_count;
+	/* Get the temp of highest trip*/
+	return exynos_get_trip_temp(thermal, max_trip - 1, temp);
+}
+
+/* Bind callback functions for thermal zone */
+static int exynos_bind(struct thermal_zone_device *thermal,
+			struct thermal_cooling_device *cdev)
+{
+	int ret = 0, i, tab_size, level;
+	struct freq_clip_table *tab_ptr, *clip_data;
+	struct exynos_thermal_zone *th_zone = thermal->devdata;
+	struct thermal_sensor_conf *data = th_zone->sensor_conf;
+	enum thermal_trip_type type;
+	struct cpufreq_policy policy;
+#ifdef CONFIG_GPU_THERMAL
+	int gpu_max_freq, gpu_min_freq;
+#endif
+
+	tab_ptr = (struct freq_clip_table *)data->cooling_data.freq_data;
+	tab_size = data->cooling_data.freq_clip_count;
+
+	if (tab_ptr == NULL || tab_size == 0)
+		return 0;
+
+	/* find the cooling device registered*/
+	for (i = 0; i < th_zone->cool_dev_size; i++)
+		if (cdev == th_zone->cool_dev[i])
+			break;
+
+	/* No matching cooling device */
+	if (i == th_zone->cool_dev_size)
+		return 0;
+
+	/* Bind the thermal zone to the cpufreq cooling device */
+	for (i = 0; i < tab_size; i++) {
+		clip_data = (struct freq_clip_table *)&(tab_ptr[i]);
+
+		if(data->d_type == CLUSTER0 || data->d_type == CLUSTER1) {
+			ret = cpufreq_get_policy(&policy, data->d_type);
+			if (ret)
+				return -EINVAL;
+
+			if (clip_data->freq_clip_max > policy.max) {
+				pr_warn("%s: Throttling freq(%d) is greater than policy max(%d)\n", __func__, clip_data->freq_clip_max, policy.max);
+				clip_data->freq_clip_max = policy.max;
+			 } else if (clip_data->freq_clip_max < policy.min){
+				pr_warn("%s: Throttling freq(%d) is lower than policy min(%d)\n", __func__, clip_data->freq_clip_max, policy.min);
+				clip_data->freq_clip_max = policy.min;
+			 }
+		}
+
+#ifdef CONFIG_GPU_THERMAL
+		if(data->d_type == GPU) {
+			gpu_max_freq = gpu_dvfs_get_max_freq() * 1000;
+			gpu_min_freq = gpu_dvfs_get_min_freq() * 1000;
+
+			if(gpu_max_freq > 0 && gpu_min_freq > 0) {
+				if (clip_data->freq_clip_max > gpu_max_freq) {
+					pr_warn("%s: GPU Throttling freq(%d) is greater than max(%d)\n", __func__, clip_data->freq_clip_max, gpu_max_freq);
+					clip_data->freq_clip_max = gpu_max_freq;
+				 } else if (clip_data->freq_clip_max < gpu_min_freq){
+					pr_warn("%s: GPU Throttling freq(%d) is lower than min(%d)\n", __func__, clip_data->freq_clip_max, gpu_min_freq);
+					clip_data->freq_clip_max = gpu_min_freq;
+				 }
+			}
+		}
+#endif
+
+		if (data->d_type == CLUSTER0)
+			level = cpufreq_cooling_get_level(0, clip_data->freq_clip_max);
+		else if (data->d_type == CLUSTER1)
+			level = cpufreq_cooling_get_level(4, clip_data->freq_clip_max);
+		else if (data->d_type == GPU)
+			level = gpufreq_cooling_get_level(0, clip_data->freq_clip_max);
+		else if (data->d_type == ISP)
+			level = isp_cooling_get_fps(0, clip_data->freq_clip_max);
+		else
+			level = (int)THERMAL_CSTATE_INVALID;
+
+		if (level == THERMAL_CSTATE_INVALID) {
+			pr_warn("Bind fail is occurred because level is invalid.\n");
+			return 0;
+		}
+
+		exynos_get_trip_type(thermal, i, &type);
+
+		switch (GET_ZONE(type)) {
+		case MONITOR_ZONE:
+		case WARN_ZONE:
+			if (thermal_zone_bind_cooling_device(thermal, i, cdev,
+								level, 0)) {
+				dev_err(data->dev,
+					"error unbinding cdev inst=%d\n", i);
+				ret = -EINVAL;
+			}
+			th_zone->bind = true;
+			break;
+		default:
+			ret = -EINVAL;
+		}
+	}
+
+	return ret;
+}
+
+/* Unbind callback functions for thermal zone */
+static int exynos_unbind(struct thermal_zone_device *thermal,
+			struct thermal_cooling_device *cdev)
+{
+	int ret = 0, i, tab_size;
+	struct exynos_thermal_zone *th_zone = thermal->devdata;
+	struct thermal_sensor_conf *data = th_zone->sensor_conf;
+	enum thermal_trip_type type;
+
+	if (th_zone->bind == false)
+		return 0;
+
+	tab_size = data->cooling_data.freq_clip_count;
+
+	if (tab_size == 0)
+		return 0;
+
+	/* find the cooling device registered*/
+	for (i = 0; i < th_zone->cool_dev_size; i++)
+		if (cdev == th_zone->cool_dev[i])
+			break;
+
+	/* No matching cooling device */
+	if (i == th_zone->cool_dev_size)
+		return 0;
+
+	/* Bind the thermal zone to the cpufreq cooling device */
+	for (i = 0; i < tab_size; i++) {
+		exynos_get_trip_type(thermal, i, &type);
+
+		switch (GET_ZONE(type)) {
+		case MONITOR_ZONE:
+		case WARN_ZONE:
+			if (thermal_zone_unbind_cooling_device(thermal, i,
+								cdev)) {
+				dev_err(data->dev,
+					"error unbinding cdev inst=%d\n", i);
+				ret = -EINVAL;
+			}
+			th_zone->bind = false;
+			break;
+		default:
+			ret = -EINVAL;
+		}
+	}
+	return ret;
+}
+
+#ifdef CONFIG_CPU_THERMAL
+extern int cpufreq_set_cur_temp(bool suspended, unsigned long temp);
+#else
+static inline int cpufreq_set_cur_temp(bool suspended, unsigned long temp) { return 0; }
+#endif
+#ifdef CONFIG_GPU_THERMAL
+extern int gpufreq_set_cur_temp(bool suspended, unsigned long temp);
+#else
+static inline int gpufreq_set_cur_temp(bool suspended, unsigned long temp) { return 0; }
+#endif
+#ifdef CONFIG_ISP_THERMAL
+extern int isp_set_cur_temp(bool suspended, unsigned long temp);
+#else
+static inline int isp_set_cur_temp(bool suspended, unsigned long temp) { return 0; }
+#endif
+
+/* Get temperature callback functions for thermal zone */
+static int exynos_get_temp(struct thermal_zone_device *thermal,
+			unsigned long *temp)
+{
+	struct exynos_thermal_zone *th_zone = thermal->devdata;
+	void *data;
+	unsigned long max_temp;
+
+	if (!th_zone->sensor_conf) {
+		dev_err(&thermal->device,
+			"Temperature sensor not initialised\n");
+		return -EINVAL;
+	}
+	data = th_zone->sensor_conf->driver_data;
+	*temp = th_zone->sensor_conf->read_temperature(data);
+
+	/* convert the temperature into millicelsius */
+	*temp = *temp * MCELSIUS;
+
+	mutex_lock(&thermal_suspend_lock);
+	if (th_zone->sensor_conf->d_type == CLUSTER0 || th_zone->sensor_conf->d_type == CLUSTER1) {
+		cpu_max_temp[th_zone->sensor_conf->d_type] = *temp;
+		max_temp = max(cpu_max_temp[CLUSTER0], cpu_max_temp[CLUSTER1]);
+		cpufreq_set_cur_temp(suspended, max_temp / 1000);
+	} else if (th_zone->sensor_conf->d_type == GPU)
+		gpufreq_set_cur_temp(suspended, *temp / 1000);
+	else if (th_zone->sensor_conf->d_type == ISP)
+		isp_set_cur_temp(suspended, *temp / 1000);
+	mutex_unlock(&thermal_suspend_lock);
+
+	return 0;
+}
+
+/* Get temperature callback functions for thermal zone */
+static int exynos_set_emul_temp(struct thermal_zone_device *thermal,
+						unsigned long temp)
+{
+	void *data;
+	int ret = -EINVAL;
+	struct exynos_thermal_zone *th_zone = thermal->devdata;
+
+	if (!th_zone->sensor_conf) {
+		dev_err(&thermal->device,
+			"Temperature sensor not initialised\n");
+		return -EINVAL;
+	}
+	data = th_zone->sensor_conf->driver_data;
+	if (th_zone->sensor_conf->write_emul_temp)
+		ret = th_zone->sensor_conf->write_emul_temp(data, temp);
+	return ret;
+}
+
+/* Get the temperature trend */
+static int exynos_get_trend(struct thermal_zone_device *thermal,
+			int trip, enum thermal_trend *trend)
+{
+	int ret;
+	unsigned long trip_temp;
+
+	ret = exynos_get_trip_temp(thermal, trip, &trip_temp);
+	if (ret < 0)
+		return ret;
+
+	if (thermal->temperature >= trip_temp)
+		*trend = THERMAL_TREND_RAISE_FULL;
+	else
+		*trend = THERMAL_TREND_DROP_FULL;
+
+	return 0;
+}
+
+struct pm_qos_request thermal_cpu_hotplug_request;
+static int exynos_throttle_cpu_hotplug(struct thermal_zone_device *thermal)
+{
+	struct exynos_thermal_zone *th_zone = thermal->devdata;
+	struct thermal_sensor_conf *data = th_zone->sensor_conf;
+	struct cpufreq_cooling_device *cpufreq_device = (struct cpufreq_cooling_device *)th_zone->cool_dev[0]->devdata;
+	int ret = 0;
+	int cur_temp = 0;
+
+	if (!thermal->temperature)
+		return -EINVAL;
+
+	cur_temp = thermal->temperature / MCELSIUS;
+
+	if (is_cpu_hotplugged_out) {
+		if (cur_temp < data->hotplug_in_threshold) {
+			/*
+			 * If current temperature is lower than low threshold,
+			 * call cluster1_cores_hotplug(false) for hotplugged out cpus.
+			 */
+			pm_qos_update_request(&thermal_cpu_hotplug_request, NR_CPUS);
+			is_cpu_hotplugged_out = false;
+			cpufreq_device->cpufreq_state = 0;
+		}
+	} else {
+		if (cur_temp >= data->hotplug_out_threshold) {
+			/*
+			 * If current temperature is higher than high threshold,
+			 * call cluster1_cores_hotplug(true) to hold temperature down.
+			 */
+			pm_qos_update_request(&thermal_cpu_hotplug_request, NR_CLUST1_CPUS);
+			is_cpu_hotplugged_out = true;
+		}
+	}
+
+	return ret;
+}
+
+/* Operation callback functions for thermal zone */
+static struct thermal_zone_device_ops exynos_dev_ops = {
+	.bind = exynos_bind,
+	.unbind = exynos_unbind,
+	.get_temp = exynos_get_temp,
+	.set_emul_temp = exynos_set_emul_temp,
+	.get_trend = exynos_get_trend,
+	.get_mode = exynos_get_mode,
+	.set_mode = exynos_set_mode,
+	.get_trip_type = exynos_get_trip_type,
+	.get_trip_temp = exynos_get_trip_temp,
+	.get_crit_temp = exynos_get_crit_temp,
+};
+
+/* Operation callback functions for thermal zone */
+static struct thermal_zone_device_ops exynos_dev_hotplug_ops = {
+	.bind = exynos_bind,
+	.unbind = exynos_unbind,
+	.get_temp = exynos_get_temp,
+	.set_emul_temp = exynos_set_emul_temp,
+	.get_trend = exynos_get_trend,
+	.get_mode = exynos_get_mode,
+	.set_mode = exynos_set_mode,
+	.get_trip_type = exynos_get_trip_type,
+	.get_trip_temp = exynos_get_trip_temp,
+	.get_crit_temp = exynos_get_crit_temp,
+	.throttle_cpu_hotplug = exynos_throttle_cpu_hotplug,
+};
+
+/*
+ * This function may be called from interrupt based temperature sensor
+ * when threshold is changed.
+ */
+void exynos_report_trigger(struct thermal_sensor_conf *conf)
+{
+	unsigned int i;
+	char data[10];
+	char *envp[] = { data, NULL };
+	struct exynos_thermal_zone *th_zone;
+
+	if (!conf || !conf->pzone_data) {
+		pr_err("Invalid temperature sensor configuration data\n");
+		return;
+	}
+
+	th_zone = conf->pzone_data;
+
+	if (th_zone->bind == false) {
+		for (i = 0; i < th_zone->cool_dev_size; i++) {
+			if (!th_zone->cool_dev[i])
+				continue;
+			exynos_bind(th_zone->therm_dev,
+					th_zone->cool_dev[i]);
+		}
+	}
+
+	thermal_zone_device_update(th_zone->therm_dev);
+
+	mutex_lock(&th_zone->therm_dev->lock);
+	/* Find the level for which trip happened */
+	for (i = 0; i < th_zone->sensor_conf->trip_data.trip_count; i++) {
+		if (th_zone->therm_dev->last_temperature <
+			th_zone->sensor_conf->trip_data.trip_val[i] * MCELSIUS)
+			break;
+	}
+
+	if (th_zone->mode == THERMAL_DEVICE_ENABLED &&
+		!th_zone->sensor_conf->trip_data.trigger_falling) {
+		if (i > 0)
+			th_zone->therm_dev->polling_delay = ACTIVE_INTERVAL;
+		else
+			th_zone->therm_dev->polling_delay = IDLE_INTERVAL;
+	}
+
+	snprintf(data, sizeof(data), "%u", i);
+	kobject_uevent_env(&th_zone->therm_dev->device.kobj, KOBJ_CHANGE, envp);
+	mutex_unlock(&th_zone->therm_dev->lock);
+}
+
+static int exynos_pm_notifier(struct notifier_block *notifier,
+			unsigned long event, void *v)
+{
+	switch (event) {
+	case PM_SUSPEND_PREPARE:
+		mutex_lock(&thermal_suspend_lock);
+		suspended = true;
+		cpufreq_set_cur_temp(suspended, 0);
+		gpufreq_set_cur_temp(suspended, 0);
+		isp_set_cur_temp(suspended, 0);
+		mutex_unlock(&thermal_suspend_lock);
+		break;
+	case PM_POST_SUSPEND:
+		mutex_lock(&thermal_suspend_lock);
+		suspended = false;
+		mutex_unlock(&thermal_suspend_lock);
+		break;
+	}
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block exynos_tmu_pm_notifier = {
+	.notifier_call = exynos_pm_notifier,
+};
+
+/* Register with the in-kernel thermal management */
+int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf)
+{
+	int ret, cpu;
+	struct cpumask mask_val;
+	struct exynos_thermal_zone *th_zone;
+	struct thermal_zone_device_ops *dev_ops;
+
+	if (!sensor_conf || !sensor_conf->read_temperature) {
+		pr_err("Temperature sensor not initialised\n");
+		return -EINVAL;
+	}
+
+	th_zone = devm_kzalloc(sensor_conf->dev,
+				sizeof(struct exynos_thermal_zone), GFP_KERNEL);
+	if (!th_zone)
+		return -ENOMEM;
+
+	th_zone->sensor_conf = sensor_conf;
+	cpumask_clear(&mask_val);
+
+	for_each_possible_cpu(cpu) {
+		if (cpu_topology[cpu].cluster_id == sensor_conf->id) {
+			cpumask_copy(&mask_val, topology_core_cpumask(cpu));
+			break;
+		}
+	}
+
+	/*
+	 * TODO: 1) Handle multiple cooling devices in a thermal zone
+	 *	 2) Add a flag/name in cooling info to map to specific
+	 *	 sensor
+	 */
+	if (sensor_conf->cooling_data.freq_clip_count > 0) {
+		if (sensor_conf->d_type == CLUSTER0 || sensor_conf->d_type == CLUSTER1) {
+			th_zone->cool_dev[th_zone->cool_dev_size] =
+					cpufreq_cooling_register(&mask_val);
+		} else if (sensor_conf->d_type ==  GPU) {
+			th_zone->cool_dev[th_zone->cool_dev_size] =
+					gpufreq_cooling_register(&mask_val);
+		} else if (sensor_conf->d_type ==  ISP) {
+			th_zone->cool_dev[th_zone->cool_dev_size] =
+					isp_cooling_register(&mask_val);
+		}
+		if (IS_ERR(th_zone->cool_dev[th_zone->cool_dev_size])) {
+			dev_err(sensor_conf->dev,
+				"Failed to register cpufreq cooling device\n");
+			ret = -EINVAL;
+			goto err_unregister;
+		}
+		th_zone->cool_dev_size++;
+	}
+
+	/* Add hotplug function ops */
+	if (sensor_conf->hotplug_enable) {
+		dev_ops = &exynos_dev_hotplug_ops;
+		pm_qos_add_request(&thermal_cpu_hotplug_request, PM_QOS_CPU_ONLINE_MAX,
+					PM_QOS_CPU_ONLINE_MAX_DEFAULT_VALUE);
+	} else
+		dev_ops = &exynos_dev_ops;
+
+	th_zone->therm_dev = thermal_zone_device_register(
+			sensor_conf->name, sensor_conf->trip_data.trip_count,
+			0, th_zone, dev_ops, NULL, 0,
+			sensor_conf->trip_data.trigger_falling ? 0 :
+			IDLE_INTERVAL);
+
+	if (IS_ERR(th_zone->therm_dev)) {
+		dev_err(sensor_conf->dev,
+			"Failed to register thermal zone device\n");
+		ret = PTR_ERR(th_zone->therm_dev);
+		goto err_unregister;
+	}
+	th_zone->mode = THERMAL_DEVICE_ENABLED;
+	sensor_conf->pzone_data = th_zone;
+
+	if (sensor_conf->id == 0)
+		register_pm_notifier(&exynos_tmu_pm_notifier);
+
+	dev_info(sensor_conf->dev,
+		"Exynos: Thermal zone(%s) registered\n", sensor_conf->name);
+
+	return 0;
+
+err_unregister:
+	exynos_unregister_thermal(sensor_conf);
+	return ret;
+}
+
+/* Un-Register with the in-kernel thermal management */
+void exynos_unregister_thermal(struct thermal_sensor_conf *sensor_conf)
+{
+	int i;
+	struct exynos_thermal_zone *th_zone;
+
+	if (!sensor_conf || !sensor_conf->pzone_data) {
+		pr_err("Invalid temperature sensor configuration data\n");
+		return;
+	}
+
+	th_zone = sensor_conf->pzone_data;
+
+	thermal_zone_device_unregister(th_zone->therm_dev);
+
+	for (i = 0; i < th_zone->cool_dev_size; i++) {
+		if (sensor_conf->d_type == CLUSTER0 || sensor_conf->d_type == CLUSTER1)
+			cpufreq_cooling_unregister(th_zone->cool_dev[i]);
+		else if (sensor_conf->d_type == GPU)
+			gpufreq_cooling_unregister(th_zone->cool_dev[i]);
+		else if (sensor_conf->d_type == ISP)
+			isp_cooling_unregister(th_zone->cool_dev[i]);
+	}
+
+	if (sensor_conf->id == 0)
+		unregister_pm_notifier(&exynos_tmu_pm_notifier);
+
+	dev_info(sensor_conf->dev,
+		"Exynos: Kernel Thermal management unregistered\n");
+}