diff options
Diffstat (limited to 'drivers/platform/x86/lenovo/wmi-capdata01.c')
| -rw-r--r-- | drivers/platform/x86/lenovo/wmi-capdata01.c | 302 |
1 files changed, 0 insertions, 302 deletions
diff --git a/drivers/platform/x86/lenovo/wmi-capdata01.c b/drivers/platform/x86/lenovo/wmi-capdata01.c deleted file mode 100644 index fc7e3454e71d..000000000000 --- a/drivers/platform/x86/lenovo/wmi-capdata01.c +++ /dev/null @@ -1,302 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Lenovo Capability Data 01 WMI Data Block driver. - * - * Lenovo Capability Data 01 provides information on tunable attributes used by - * the "Other Mode" WMI interface. The data includes if the attribute is - * supported by the hardware, the default_value, max_value, min_value, and step - * increment. Each attribute has multiple pages, one for each of the thermal - * modes managed by the Gamezone interface. - * - * Copyright (C) 2025 Derek J. Clark <derekjohn.clark@gmail.com> - */ - -#include <linux/acpi.h> -#include <linux/cleanup.h> -#include <linux/component.h> -#include <linux/container_of.h> -#include <linux/device.h> -#include <linux/export.h> -#include <linux/gfp_types.h> -#include <linux/module.h> -#include <linux/mutex.h> -#include <linux/mutex_types.h> -#include <linux/notifier.h> -#include <linux/overflow.h> -#include <linux/types.h> -#include <linux/wmi.h> - -#include "wmi-capdata01.h" - -#define LENOVO_CAPABILITY_DATA_01_GUID "7A8F5407-CB67-4D6E-B547-39B3BE018154" - -#define ACPI_AC_CLASS "ac_adapter" -#define ACPI_AC_NOTIFY_STATUS 0x80 - -struct lwmi_cd01_priv { - struct notifier_block acpi_nb; /* ACPI events */ - struct wmi_device *wdev; - struct cd01_list *list; -}; - -struct cd01_list { - struct mutex list_mutex; /* list R/W mutex */ - u8 count; - struct capdata01 data[]; -}; - -/** - * lwmi_cd01_component_bind() - Bind component to master device. - * @cd01_dev: Pointer to the lenovo-wmi-capdata01 driver parent device. - * @om_dev: Pointer to the lenovo-wmi-other driver parent device. - * @data: capdata01_list object pointer used to return the capability data. - * - * On lenovo-wmi-other's master bind, provide a pointer to the local capdata01 - * list. This is used to call lwmi_cd01_get_data to look up attribute data - * from the lenovo-wmi-other driver. - * - * Return: 0 - */ -static int lwmi_cd01_component_bind(struct device *cd01_dev, - struct device *om_dev, void *data) -{ - struct lwmi_cd01_priv *priv = dev_get_drvdata(cd01_dev); - struct cd01_list **cd01_list = data; - - *cd01_list = priv->list; - - return 0; -} - -static const struct component_ops lwmi_cd01_component_ops = { - .bind = lwmi_cd01_component_bind, -}; - -/** - * lwmi_cd01_get_data - Get the data of the specified attribute - * @list: The lenovo-wmi-capdata01 pointer to its cd01_list struct. - * @attribute_id: The capdata attribute ID to be found. - * @output: Pointer to a capdata01 struct to return the data. - * - * Retrieves the capability data 01 struct pointer for the given - * attribute for its specified thermal mode. - * - * Return: 0 on success, or -EINVAL. - */ -int lwmi_cd01_get_data(struct cd01_list *list, u32 attribute_id, struct capdata01 *output) -{ - u8 idx; - - guard(mutex)(&list->list_mutex); - for (idx = 0; idx < list->count; idx++) { - if (list->data[idx].id != attribute_id) - continue; - memcpy(output, &list->data[idx], sizeof(list->data[idx])); - return 0; - } - - return -EINVAL; -} -EXPORT_SYMBOL_NS_GPL(lwmi_cd01_get_data, "LENOVO_WMI_CD01"); - -/** - * lwmi_cd01_cache() - Cache all WMI data block information - * @priv: lenovo-wmi-capdata01 driver data. - * - * Loop through each WMI data block and cache the data. - * - * Return: 0 on success, or an error. - */ -static int lwmi_cd01_cache(struct lwmi_cd01_priv *priv) -{ - int idx; - - guard(mutex)(&priv->list->list_mutex); - for (idx = 0; idx < priv->list->count; idx++) { - union acpi_object *ret_obj __free(kfree) = NULL; - - ret_obj = wmidev_block_query(priv->wdev, idx); - if (!ret_obj) - return -ENODEV; - - if (ret_obj->type != ACPI_TYPE_BUFFER || - ret_obj->buffer.length < sizeof(priv->list->data[idx])) - continue; - - memcpy(&priv->list->data[idx], ret_obj->buffer.pointer, - ret_obj->buffer.length); - } - - return 0; -} - -/** - * lwmi_cd01_alloc() - Allocate a cd01_list struct in drvdata - * @priv: lenovo-wmi-capdata01 driver data. - * - * Allocate a cd01_list struct large enough to contain data from all WMI data - * blocks provided by the interface. - * - * Return: 0 on success, or an error. - */ -static int lwmi_cd01_alloc(struct lwmi_cd01_priv *priv) -{ - struct cd01_list *list; - size_t list_size; - int count, ret; - - count = wmidev_instance_count(priv->wdev); - list_size = struct_size(list, data, count); - - list = devm_kzalloc(&priv->wdev->dev, list_size, GFP_KERNEL); - if (!list) - return -ENOMEM; - - ret = devm_mutex_init(&priv->wdev->dev, &list->list_mutex); - if (ret) - return ret; - - list->count = count; - priv->list = list; - - return 0; -} - -/** - * lwmi_cd01_setup() - Cache all WMI data block information - * @priv: lenovo-wmi-capdata01 driver data. - * - * Allocate a cd01_list struct large enough to contain data from all WMI data - * blocks provided by the interface. Then loop through each data block and - * cache the data. - * - * Return: 0 on success, or an error code. - */ -static int lwmi_cd01_setup(struct lwmi_cd01_priv *priv) -{ - int ret; - - ret = lwmi_cd01_alloc(priv); - if (ret) - return ret; - - return lwmi_cd01_cache(priv); -} - -/** - * lwmi_cd01_notifier_call() - Call method for lenovo-wmi-capdata01 driver notifier. - * block call chain. - * @nb: The notifier_block registered to lenovo-wmi-events driver. - * @action: Unused. - * @data: The ACPI event. - * - * For LWMI_EVENT_THERMAL_MODE, set current_mode and notify platform_profile - * of a change. - * - * Return: notifier_block status. - */ -static int lwmi_cd01_notifier_call(struct notifier_block *nb, unsigned long action, - void *data) -{ - struct acpi_bus_event *event = data; - struct lwmi_cd01_priv *priv; - int ret; - - if (strcmp(event->device_class, ACPI_AC_CLASS) != 0) - return NOTIFY_DONE; - - priv = container_of(nb, struct lwmi_cd01_priv, acpi_nb); - - switch (event->type) { - case ACPI_AC_NOTIFY_STATUS: - ret = lwmi_cd01_cache(priv); - if (ret) - return NOTIFY_BAD; - - return NOTIFY_OK; - default: - return NOTIFY_DONE; - } -} - -/** - * lwmi_cd01_unregister() - Unregister the cd01 ACPI notifier_block. - * @data: The ACPI event notifier_block to unregister. - */ -static void lwmi_cd01_unregister(void *data) -{ - struct notifier_block *acpi_nb = data; - - unregister_acpi_notifier(acpi_nb); -} - -static int lwmi_cd01_probe(struct wmi_device *wdev, const void *context) - -{ - struct lwmi_cd01_priv *priv; - int ret; - - priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - priv->wdev = wdev; - dev_set_drvdata(&wdev->dev, priv); - - ret = lwmi_cd01_setup(priv); - if (ret) - return ret; - - priv->acpi_nb.notifier_call = lwmi_cd01_notifier_call; - - ret = register_acpi_notifier(&priv->acpi_nb); - if (ret) - return ret; - - ret = devm_add_action_or_reset(&wdev->dev, lwmi_cd01_unregister, &priv->acpi_nb); - if (ret) - return ret; - - return component_add(&wdev->dev, &lwmi_cd01_component_ops); -} - -static void lwmi_cd01_remove(struct wmi_device *wdev) -{ - component_del(&wdev->dev, &lwmi_cd01_component_ops); -} - -static const struct wmi_device_id lwmi_cd01_id_table[] = { - { LENOVO_CAPABILITY_DATA_01_GUID, NULL }, - {} -}; - -static struct wmi_driver lwmi_cd01_driver = { - .driver = { - .name = "lenovo_wmi_cd01", - .probe_type = PROBE_PREFER_ASYNCHRONOUS, - }, - .id_table = lwmi_cd01_id_table, - .probe = lwmi_cd01_probe, - .remove = lwmi_cd01_remove, - .no_singleton = true, -}; - -/** - * lwmi_cd01_match() - Match rule for the master driver. - * @dev: Pointer to the capability data 01 parent device. - * @data: Unused void pointer for passing match criteria. - * - * Return: int. - */ -int lwmi_cd01_match(struct device *dev, void *data) -{ - return dev->driver == &lwmi_cd01_driver.driver; -} -EXPORT_SYMBOL_NS_GPL(lwmi_cd01_match, "LENOVO_WMI_CD01"); - -module_wmi_driver(lwmi_cd01_driver); - -MODULE_DEVICE_TABLE(wmi, lwmi_cd01_id_table); -MODULE_AUTHOR("Derek J. Clark <derekjohn.clark@gmail.com>"); -MODULE_DESCRIPTION("Lenovo Capability Data 01 WMI Driver"); -MODULE_LICENSE("GPL"); |