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- /*
- * 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>
- #include "int340x_thermal_zone.h"
- #define INT3403_TYPE_SENSOR 0x03
- #define INT3403_TYPE_CHARGER 0x0B
- #define INT3403_TYPE_BATTERY 0x0C
- #define INT3403_PERF_CHANGED_EVENT 0x80
- #define INT3403_PERF_TRIP_POINT_CHANGED 0x81
- #define INT3403_THERMAL_EVENT 0x90
- /* Preserved structure for future expandbility */
- struct int3403_sensor {
- struct int34x_thermal_zone *int340x_zone;
- };
- 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 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:
- int340x_thermal_zone_device_update(obj->int340x_zone,
- THERMAL_TRIP_VIOLATED);
- break;
- case INT3403_PERF_TRIP_POINT_CHANGED:
- int340x_thermal_read_trips(obj->int340x_zone);
- int340x_thermal_zone_device_update(obj->int340x_zone,
- THERMAL_TRIP_CHANGED);
- break;
- default:
- dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
- break;
- }
- }
- static int int3403_sensor_add(struct int3403_priv *priv)
- {
- int result = 0;
- struct int3403_sensor *obj;
- obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
- if (!obj)
- return -ENOMEM;
- priv->priv = obj;
- obj->int340x_zone = int340x_thermal_zone_add(priv->adev, NULL);
- if (IS_ERR(obj->int340x_zone))
- return PTR_ERR(obj->int340x_zone);
- 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:
- int340x_thermal_zone_remove(obj->int340x_zone);
- return result;
- }
- static int int3403_sensor_remove(struct int3403_priv *priv)
- {
- struct int3403_sensor *obj = priv->priv;
- acpi_remove_notify_handler(priv->adev->handle,
- ACPI_DEVICE_NOTIFY, int3403_notify);
- int340x_thermal_zone_remove(obj->int340x_zone);
- 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");
- kfree(buf.pointer);
- return -EFAULT;
- }
- priv->priv = obj;
- 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);
- kfree(buf.pointer);
- /* 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)) {
- unsigned long long tmp;
- status = acpi_evaluate_integer(priv->adev->handle, "_TMP",
- NULL, &tmp);
- if (ACPI_FAILURE(status)) {
- result = -EINVAL;
- goto err;
- } else {
- priv->type = INT3403_TYPE_SENSOR;
- }
- }
- 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",
- .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");
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