// SPDX-License-Identifier: GPL-2.0+ /* * HWMON driver for ASUS motherboards that publish some sensor values * via the embedded controller registers. * * Copyright (C) 2021 Eugene Shalygin <[email protected]> * EC provides: * - Chipset temperature * - CPU temperature * - Motherboard temperature * - T_Sensor temperature * - VRM temperature * - Water In temperature * - Water Out temperature * - CPU Optional fan RPM * - Chipset fan RPM * - VRM Heat Sink fan RPM * - Water Flow fan RPM * - CPU current * - CPU core voltage */ #include <linux/acpi.h> #include <linux/bitops.h> #include <linux/dev_printk.h> #include <linux/dmi.h> #include <linux/hwmon.h> #include <linux/init.h> #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/sort.h> #include <linux/units.h> #include <asm/unaligned.h> static char *mutex_path_override; /* Writing to this EC register switches EC bank */ #define ASUS_EC_BANK_REGISTER … #define SENSOR_LABEL_LEN … /* * Arbitrary set max. allowed bank number. Required for sorting banks and * currently is overkill with just 2 banks used at max, but for the sake * of alignment let's set it to a higher value. */ #define ASUS_EC_MAX_BANK … #define ACPI_LOCK_DELAY_MS … /* ACPI mutex for locking access to the EC for the firmware */ #define ASUS_HW_ACCESS_MUTEX_ASMX … #define ASUS_HW_ACCESS_MUTEX_RMTW_ASMX … #define ASUS_HW_ACCESS_MUTEX_SB_PCI0_SBRG_SIO1_MUT0 … #define MAX_IDENTICAL_BOARD_VARIATIONS … /* Moniker for the ACPI global lock (':' is not allowed in ASL identifiers) */ #define ACPI_GLOBAL_LOCK_PSEUDO_PATH … sensor_address; #define MAKE_SENSOR_ADDRESS(size, bank, index) … static u32 hwmon_attributes[hwmon_max] = …; struct ec_sensor_info { … }; #define EC_SENSOR(sensor_label, sensor_type, size, bank, index) … enum ec_sensors { … }; #define SENSOR_TEMP_CHIPSET … #define SENSOR_TEMP_CPU … #define SENSOR_TEMP_CPU_PACKAGE … #define SENSOR_TEMP_MB … #define SENSOR_TEMP_T_SENSOR … #define SENSOR_TEMP_VRM … #define SENSOR_IN_CPU_CORE … #define SENSOR_FAN_CPU_OPT … #define SENSOR_FAN_VRM_HS … #define SENSOR_FAN_CHIPSET … #define SENSOR_FAN_WATER_FLOW … #define SENSOR_CURR_CPU … #define SENSOR_TEMP_WATER_IN … #define SENSOR_TEMP_WATER_OUT … #define SENSOR_TEMP_WATER_BLOCK_IN … #define SENSOR_TEMP_WATER_BLOCK_OUT … #define SENSOR_TEMP_T_SENSOR_2 … #define SENSOR_TEMP_SENSOR_EXTRA_1 … #define SENSOR_TEMP_SENSOR_EXTRA_2 … #define SENSOR_TEMP_SENSOR_EXTRA_3 … enum board_family { … }; /* All the known sensors for ASUS EC controllers */ static const struct ec_sensor_info sensors_family_amd_400[] = …; static const struct ec_sensor_info sensors_family_amd_500[] = …; static const struct ec_sensor_info sensors_family_amd_600[] = …; static const struct ec_sensor_info sensors_family_intel_300[] = …; static const struct ec_sensor_info sensors_family_intel_600[] = …; /* Shortcuts for common combinations */ #define SENSOR_SET_TEMP_CHIPSET_CPU_MB … #define SENSOR_SET_TEMP_WATER … #define SENSOR_SET_WATER_BLOCK … struct ec_board_info { … }; static const struct ec_board_info board_info_prime_x470_pro = …; static const struct ec_board_info board_info_prime_x570_pro = …; static const struct ec_board_info board_info_pro_art_x570_creator_wifi = …; static const struct ec_board_info board_info_pro_art_x670E_creator_wifi = …; static const struct ec_board_info board_info_pro_art_b550_creator = …; static const struct ec_board_info board_info_pro_ws_x570_ace = …; static const struct ec_board_info board_info_crosshair_x670e_hero = …; static const struct ec_board_info board_info_crosshair_x670e_gene = …; static const struct ec_board_info board_info_crosshair_viii_dark_hero = …; static const struct ec_board_info board_info_crosshair_viii_hero = …; static const struct ec_board_info board_info_maximus_xi_hero = …; static const struct ec_board_info board_info_crosshair_viii_impact = …; static const struct ec_board_info board_info_strix_b550_e_gaming = …; static const struct ec_board_info board_info_strix_b550_i_gaming = …; static const struct ec_board_info board_info_strix_x570_e_gaming = …; static const struct ec_board_info board_info_strix_x570_e_gaming_wifi_ii = …; static const struct ec_board_info board_info_strix_x570_f_gaming = …; static const struct ec_board_info board_info_strix_x570_i_gaming = …; static const struct ec_board_info board_info_strix_z390_f_gaming = …; static const struct ec_board_info board_info_strix_z690_a_gaming_wifi_d4 = …; static const struct ec_board_info board_info_zenith_ii_extreme = …; #define DMI_EXACT_MATCH_ASUS_BOARD_NAME(name, board_info) … static const struct dmi_system_id dmi_table[] = …; struct ec_sensor { … }; struct lock_data { … }; /* * The next function pairs implement options for locking access to the * state and the EC */ static bool lock_via_acpi_mutex(struct lock_data *data) { … } static bool unlock_acpi_mutex(struct lock_data *data) { … } static bool lock_via_global_acpi_lock(struct lock_data *data) { … } static bool unlock_global_acpi_lock(struct lock_data *data) { … } struct ec_sensors_data { … }; static u8 register_bank(u16 reg) { … } static u8 register_index(u16 reg) { … } static bool is_sensor_data_signed(const struct ec_sensor_info *si) { … } static const struct ec_sensor_info * get_sensor_info(const struct ec_sensors_data *state, int index) { … } static int find_ec_sensor_index(const struct ec_sensors_data *ec, enum hwmon_sensor_types type, int channel) { … } static int bank_compare(const void *a, const void *b) { … } static void setup_sensor_data(struct ec_sensors_data *ec) { … } static void fill_ec_registers(struct ec_sensors_data *ec) { … } static int setup_lock_data(struct device *dev) { … } static int asus_ec_bank_switch(u8 bank, u8 *old) { … } static int asus_ec_block_read(const struct device *dev, struct ec_sensors_data *ec) { … } static inline s32 get_sensor_value(const struct ec_sensor_info *si, u8 *data) { … } static void update_sensor_values(struct ec_sensors_data *ec, u8 *data) { … } static int update_ec_sensors(const struct device *dev, struct ec_sensors_data *ec) { … } static long scale_sensor_value(s32 value, int data_type) { … } static int get_cached_value_or_update(const struct device *dev, int sensor_index, struct ec_sensors_data *state, s32 *value) { … } /* * Now follow the functions that implement the hwmon interface */ static int asus_ec_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int asus_ec_hwmon_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, const char **str) { … } static umode_t asus_ec_hwmon_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, int channel) { … } static int asus_ec_hwmon_add_chan_info(struct hwmon_channel_info *asus_ec_hwmon_chan, struct device *dev, int num, enum hwmon_sensor_types type, u32 config) { … } static const struct hwmon_ops asus_ec_hwmon_ops = …; static struct hwmon_chip_info asus_ec_chip_info = …; static const struct ec_board_info *get_board_info(void) { … } static int asus_ec_probe(struct platform_device *pdev) { … } MODULE_DEVICE_TABLE(dmi, dmi_table); static struct platform_driver asus_ec_sensors_platform_driver = …; static struct platform_device *asus_ec_sensors_platform_device; static int __init asus_ec_init(void) { … } static void __exit asus_ec_exit(void) { … } module_init(…) …; module_exit(asus_ec_exit); module_param_named(mutex_path, mutex_path_override, charp, 0); MODULE_PARM_DESC(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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