1 files changed, 483 insertions, 0 deletions
diff --git a/drivers/thermal/int340x_thermal/int3403_thermal.c b/drivers/thermal/int340x_thermal/int3403_thermal.c
new file mode 100644
index 000000000000..6e9fb62eb817
--- /dev/null
+++ b/drivers/thermal/int340x_thermal/int3403_thermal.c
@@ -0,0 +1,483 @@
+/*
+ * ACPI INT3403 thermal driver
+ * Copyright (c) 2013, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/acpi.h>
+#include <linux/thermal.h>
+#include <linux/platform_device.h>
+
+#define INT3403_TYPE_SENSOR		0x03
+#define INT3403_TYPE_CHARGER		0x0B
+#define INT3403_TYPE_BATTERY		0x0C
+#define INT3403_PERF_CHANGED_EVENT	0x80
+#define INT3403_THERMAL_EVENT		0x90
+
+#define DECI_KELVIN_TO_MILLI_CELSIUS(t, off) (((t) - (off)) * 100)
+#define KELVIN_OFFSET	2732
+#define MILLI_CELSIUS_TO_DECI_KELVIN(t, off) (((t) / 100) + (off))
+
+struct int3403_sensor {
+	struct thermal_zone_device *tzone;
+	unsigned long *thresholds;
+	unsigned long	crit_temp;
+	int		crit_trip_id;
+	unsigned long	psv_temp;
+	int		psv_trip_id;
+
+};
+
+struct int3403_performance_state {
+	u64 performance;
+	u64 power;
+	u64 latency;
+	u64 linear;
+	u64 control;
+	u64 raw_performace;
+	char *raw_unit;
+	int reserved;
+};
+
+struct int3403_cdev {
+	struct thermal_cooling_device *cdev;
+	unsigned long max_state;
+};
+
+struct int3403_priv {
+	struct platform_device *pdev;
+	struct acpi_device *adev;
+	unsigned long long type;
+	void *priv;
+};
+
+static int sys_get_curr_temp(struct thermal_zone_device *tzone,
+				unsigned long *temp)
+{
+	struct int3403_priv *priv = tzone->devdata;
+	struct acpi_device *device = priv->adev;
+	unsigned long long tmp;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(device->handle, "_TMP", NULL, &tmp);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(tmp, KELVIN_OFFSET);
+
+	return 0;
+}
+
+static int sys_get_trip_hyst(struct thermal_zone_device *tzone,
+		int trip, unsigned long *temp)
+{
+	struct int3403_priv *priv = tzone->devdata;
+	struct acpi_device *device = priv->adev;
+	unsigned long long hyst;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(device->handle, "GTSH", NULL, &hyst);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	/*
+	 * Thermal hysteresis represents a temperature difference.
+	 * Kelvin and Celsius have same degree size. So the
+	 * conversion here between tenths of degree Kelvin unit
+	 * and Milli-Celsius unit is just to multiply 100.
+	 */
+	*temp = hyst * 100;
+
+	return 0;
+}
+
+static int sys_get_trip_temp(struct thermal_zone_device *tzone,
+		int trip, unsigned long *temp)
+{
+	struct int3403_priv *priv = tzone->devdata;
+	struct int3403_sensor *obj = priv->priv;
+
+	if (priv->type != INT3403_TYPE_SENSOR || !obj)
+		return -EINVAL;
+
+	if (trip == obj->crit_trip_id)
+		*temp = obj->crit_temp;
+	else if (trip == obj->psv_trip_id)
+		*temp = obj->psv_temp;
+	else {
+		/*
+		 * get_trip_temp is a mandatory callback but
+		 * PATx method doesn't return any value, so return
+		 * cached value, which was last set from user space
+		 */
+		*temp = obj->thresholds[trip];
+	}
+
+	return 0;
+}
+
+static int sys_get_trip_type(struct thermal_zone_device *thermal,
+		int trip, enum thermal_trip_type *type)
+{
+	struct int3403_priv *priv = thermal->devdata;
+	struct int3403_sensor *obj = priv->priv;
+
+	/* Mandatory callback, may not mean much here */
+	if (trip == obj->crit_trip_id)
+		*type = THERMAL_TRIP_CRITICAL;
+	else
+		*type = THERMAL_TRIP_PASSIVE;
+
+	return 0;
+}
+
+int sys_set_trip_temp(struct thermal_zone_device *tzone, int trip,
+							unsigned long temp)
+{
+	struct int3403_priv *priv = tzone->devdata;
+	struct acpi_device *device = priv->adev;
+	struct int3403_sensor *obj = priv->priv;
+	acpi_status status;
+	char name[10];
+	int ret = 0;
+
+	snprintf(name, sizeof(name), "PAT%d", trip);
+	if (acpi_has_method(device->handle, name)) {
+		status = acpi_execute_simple_method(device->handle, name,
+				MILLI_CELSIUS_TO_DECI_KELVIN(temp,
+							KELVIN_OFFSET));
+		if (ACPI_FAILURE(status))
+			ret = -EIO;
+		else
+			obj->thresholds[trip] = temp;
+	} else {
+		ret = -EIO;
+		dev_err(&device->dev, "sys_set_trip_temp: method not found\n");
+	}
+
+	return ret;
+}
+
+static struct thermal_zone_device_ops tzone_ops = {
+	.get_temp = sys_get_curr_temp,
+	.get_trip_temp = sys_get_trip_temp,
+	.get_trip_type = sys_get_trip_type,
+	.set_trip_temp = sys_set_trip_temp,
+	.get_trip_hyst =  sys_get_trip_hyst,
+};
+
+static struct thermal_zone_params int3403_thermal_params = {
+	.governor_name = "user_space",
+	.no_hwmon = true,
+};
+
+static void int3403_notify(acpi_handle handle,
+		u32 event, void *data)
+{
+	struct int3403_priv *priv = data;
+	struct int3403_sensor *obj;
+
+	if (!priv)
+		return;
+
+	obj = priv->priv;
+	if (priv->type != INT3403_TYPE_SENSOR || !obj)
+		return;
+
+	switch (event) {
+	case INT3403_PERF_CHANGED_EVENT:
+		break;
+	case INT3403_THERMAL_EVENT:
+		thermal_zone_device_update(obj->tzone);
+		break;
+	default:
+		dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
+		break;
+	}
+}
+
+static int sys_get_trip_crt(struct acpi_device *device, unsigned long *temp)
+{
+	unsigned long long crt;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(device->handle, "_CRT", NULL, &crt);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(crt, KELVIN_OFFSET);
+
+	return 0;
+}
+
+static int sys_get_trip_psv(struct acpi_device *device, unsigned long *temp)
+{
+	unsigned long long psv;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(device->handle, "_PSV", NULL, &psv);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(psv, KELVIN_OFFSET);
+
+	return 0;
+}
+
+static int int3403_sensor_add(struct int3403_priv *priv)
+{
+	int result = 0;
+	acpi_status status;
+	struct int3403_sensor *obj;
+	unsigned long long trip_cnt;
+	int trip_mask = 0;
+
+	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
+	if (!obj)
+		return -ENOMEM;
+
+	priv->priv = obj;
+
+	status = acpi_evaluate_integer(priv->adev->handle, "PATC", NULL,
+						&trip_cnt);
+	if (ACPI_FAILURE(status))
+		trip_cnt = 0;
+
+	if (trip_cnt) {
+		/* We have to cache, thresholds can't be readback */
+		obj->thresholds = devm_kzalloc(&priv->pdev->dev,
+					sizeof(*obj->thresholds) * trip_cnt,
+					GFP_KERNEL);
+		if (!obj->thresholds) {
+			result = -ENOMEM;
+			goto err_free_obj;
+		}
+		trip_mask = BIT(trip_cnt) - 1;
+	}
+
+	obj->psv_trip_id = -1;
+	if (!sys_get_trip_psv(priv->adev, &obj->psv_temp))
+		obj->psv_trip_id = trip_cnt++;
+
+	obj->crit_trip_id = -1;
+	if (!sys_get_trip_crt(priv->adev, &obj->crit_temp))
+		obj->crit_trip_id = trip_cnt++;
+
+	obj->tzone = thermal_zone_device_register(acpi_device_bid(priv->adev),
+				trip_cnt, trip_mask, priv, &tzone_ops,
+				&int3403_thermal_params, 0, 0);
+	if (IS_ERR(obj->tzone)) {
+		result = PTR_ERR(obj->tzone);
+		obj->tzone = NULL;
+		goto err_free_obj;
+	}
+
+	result = acpi_install_notify_handler(priv->adev->handle,
+			ACPI_DEVICE_NOTIFY, int3403_notify,
+			(void *)priv);
+	if (result)
+		goto err_free_obj;
+
+	return 0;
+
+ err_free_obj:
+	if (obj->tzone)
+		thermal_zone_device_unregister(obj->tzone);
+	return result;
+}
+
+static int int3403_sensor_remove(struct int3403_priv *priv)
+{
+	struct int3403_sensor *obj = priv->priv;
+
+	thermal_zone_device_unregister(obj->tzone);
+	return 0;
+}
+
+/* INT3403 Cooling devices */
+static int int3403_get_max_state(struct thermal_cooling_device *cdev,
+				 unsigned long *state)
+{
+	struct int3403_priv *priv = cdev->devdata;
+	struct int3403_cdev *obj = priv->priv;
+
+	*state = obj->max_state;
+	return 0;
+}
+
+static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
+				 unsigned long *state)
+{
+	struct int3403_priv *priv = cdev->devdata;
+	unsigned long long level;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
+	if (ACPI_SUCCESS(status)) {
+		*state = level;
+		return 0;
+	} else
+		return -EINVAL;
+}
+
+static int
+int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
+{
+	struct int3403_priv *priv = cdev->devdata;
+	acpi_status status;
+
+	status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
+	if (ACPI_SUCCESS(status))
+		return 0;
+	else
+		return -EINVAL;
+}
+
+static const struct thermal_cooling_device_ops int3403_cooling_ops = {
+	.get_max_state = int3403_get_max_state,
+	.get_cur_state = int3403_get_cur_state,
+	.set_cur_state = int3403_set_cur_state,
+};
+
+static int int3403_cdev_add(struct int3403_priv *priv)
+{
+	int result = 0;
+	acpi_status status;
+	struct int3403_cdev *obj;
+	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
+	union acpi_object *p;
+
+	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
+	if (!obj)
+		return -ENOMEM;
+
+	status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
+	p = buf.pointer;
+	if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
+		printk(KERN_WARNING "Invalid PPSS data\n");
+		return -EFAULT;
+	}
+
+	obj->max_state = p->package.count - 1;
+	obj->cdev =
+		thermal_cooling_device_register(acpi_device_bid(priv->adev),
+				priv, &int3403_cooling_ops);
+	if (IS_ERR(obj->cdev))
+		result = PTR_ERR(obj->cdev);
+
+	priv->priv = obj;
+
+	/* TODO: add ACPI notification support */
+
+	return result;
+}
+
+static int int3403_cdev_remove(struct int3403_priv *priv)
+{
+	struct int3403_cdev *obj = priv->priv;
+
+	thermal_cooling_device_unregister(obj->cdev);
+	return 0;
+}
+
+static int int3403_add(struct platform_device *pdev)
+{
+	struct int3403_priv *priv;
+	int result = 0;
+	acpi_status status;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
+			    GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->pdev = pdev;
+	priv->adev = ACPI_COMPANION(&(pdev->dev));
+	if (!priv->adev) {
+		result = -EINVAL;
+		goto err;
+	}
+
+	status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
+				       NULL, &priv->type);
+	if (ACPI_FAILURE(status)) {
+		result = -EINVAL;
+		goto err;
+	}
+
+	platform_set_drvdata(pdev, priv);
+	switch (priv->type) {
+	case INT3403_TYPE_SENSOR:
+		result = int3403_sensor_add(priv);
+		break;
+	case INT3403_TYPE_CHARGER:
+	case INT3403_TYPE_BATTERY:
+		result = int3403_cdev_add(priv);
+		break;
+	default:
+		result = -EINVAL;
+	}
+
+	if (result)
+		goto err;
+	return result;
+
+err:
+	return result;
+}
+
+static int int3403_remove(struct platform_device *pdev)
+{
+	struct int3403_priv *priv = platform_get_drvdata(pdev);
+
+	switch (priv->type) {
+	case INT3403_TYPE_SENSOR:
+		int3403_sensor_remove(priv);
+		break;
+	case INT3403_TYPE_CHARGER:
+	case INT3403_TYPE_BATTERY:
+		int3403_cdev_remove(priv);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static const struct acpi_device_id int3403_device_ids[] = {
+	{"INT3403", 0},
+	{"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, int3403_device_ids);
+
+static struct platform_driver int3403_driver = {
+	.probe = int3403_add,
+	.remove = int3403_remove,
+	.driver = {
+		.name = "int3403 thermal",
+		.owner  = THIS_MODULE,
+		.acpi_match_table = int3403_device_ids,
+	},
+};
+
+module_platform_driver(int3403_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ACPI INT3403 thermal driver");