// SPDX-License-Identifier: GPL-2.0 /* * Huawei WMI laptop extras driver * * Copyright (C) 2018 Ayman Bagabas <[email protected]> */ #include <linux/acpi.h> #include <linux/debugfs.h> #include <linux/delay.h> #include <linux/dmi.h> #include <linux/input.h> #include <linux/input/sparse-keymap.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/platform_device.h> #include <linux/power_supply.h> #include <linux/sysfs.h> #include <linux/wmi.h> #include <acpi/battery.h> /* * Huawei WMI GUIDs */ #define HWMI_METHOD_GUID … #define HWMI_EVENT_GUID … /* Legacy GUIDs */ #define WMI0_EXPENSIVE_GUID … #define WMI0_EVENT_GUID … /* HWMI commands */ enum { … }; hwmi_arg; struct quirk_entry { … }; static struct quirk_entry *quirks; struct huawei_wmi_debug { … }; struct huawei_wmi { … }; static struct huawei_wmi *huawei_wmi; static const struct key_entry huawei_wmi_keymap[] = …; static int battery_reset = …; static int report_brightness = …; module_param(battery_reset, bint, 0444); MODULE_PARM_DESC(…) …; module_param(report_brightness, bint, 0444); MODULE_PARM_DESC(…) …; /* Quirks */ static int __init dmi_matched(const struct dmi_system_id *dmi) { … } static struct quirk_entry quirk_unknown = …; static struct quirk_entry quirk_battery_reset = …; static struct quirk_entry quirk_matebook_x = …; static const struct dmi_system_id huawei_quirks[] = …; /* Utils */ static int huawei_wmi_call(struct huawei_wmi *huawei, struct acpi_buffer *in, struct acpi_buffer *out) { … } /* HWMI takes a 64 bit input and returns either a package with 2 buffers, one of * 4 bytes and the other of 256 bytes, or one buffer of size 0x104 (260) bytes. * The first 4 bytes are ignored, we ignore the first 4 bytes buffer if we got a * package, or skip the first 4 if a buffer of 0x104 is used. The first byte of * the remaining 0x100 sized buffer has the return status of every call. In case * the return status is non-zero, we return -ENODEV but still copy the returned * buffer to the given buffer parameter (buf). */ static int huawei_wmi_cmd(u64 arg, u8 *buf, size_t buflen) { … } /* LEDs */ static int huawei_wmi_micmute_led_set(struct led_classdev *led_cdev, enum led_brightness brightness) { … } static void huawei_wmi_leds_setup(struct device *dev) { … } /* Battery protection */ static int huawei_wmi_battery_get(int *start, int *end) { … } static int huawei_wmi_battery_set(int start, int end) { … } static ssize_t charge_control_start_threshold_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t charge_control_end_threshold_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t charge_control_thresholds_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t charge_control_start_threshold_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { … } static ssize_t charge_control_end_threshold_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { … } static ssize_t charge_control_thresholds_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { … } static DEVICE_ATTR_RW(charge_control_start_threshold); static DEVICE_ATTR_RW(charge_control_end_threshold); static DEVICE_ATTR_RW(charge_control_thresholds); static int huawei_wmi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook) { … } static int huawei_wmi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook) { … } static struct acpi_battery_hook huawei_wmi_battery_hook = …; static void huawei_wmi_battery_setup(struct device *dev) { … } static void huawei_wmi_battery_exit(struct device *dev) { … } /* Fn lock */ static int huawei_wmi_fn_lock_get(int *on) { … } static int huawei_wmi_fn_lock_set(int on) { … } static ssize_t fn_lock_state_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t fn_lock_state_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { … } static DEVICE_ATTR_RW(fn_lock_state); static void huawei_wmi_fn_lock_setup(struct device *dev) { … } static void huawei_wmi_fn_lock_exit(struct device *dev) { … } /* debugfs */ static void huawei_wmi_debugfs_call_dump(struct seq_file *m, void *data, union acpi_object *obj) { … } static int huawei_wmi_debugfs_call_show(struct seq_file *m, void *data) { … } DEFINE_SHOW_ATTRIBUTE(…); static void huawei_wmi_debugfs_setup(struct device *dev) { … } static void huawei_wmi_debugfs_exit(struct device *dev) { … } /* Input */ static void huawei_wmi_process_key(struct input_dev *idev, int code) { … } static void huawei_wmi_input_notify(u32 value, void *context) { … } static int huawei_wmi_input_setup(struct device *dev, const char *guid) { … } static void huawei_wmi_input_exit(struct device *dev, const char *guid) { … } /* Huawei driver */ static const struct wmi_device_id huawei_wmi_events_id_table[] = …; static int huawei_wmi_probe(struct platform_device *pdev) { … } static void huawei_wmi_remove(struct platform_device *pdev) { … } static struct platform_driver huawei_wmi_driver = …; static __init int huawei_wmi_init(void) { … } static __exit void huawei_wmi_exit(void) { … } module_init(…) …; module_exit(huawei_wmi_exit); MODULE_ALIAS(…) …; MODULE_DEVICE_TABLE(wmi, huawei_wmi_events_id_table); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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