// SPDX-License-Identifier: GPL-2.0-or-later /* * nct6775 - Platform driver for the hardware monitoring * functionality of Nuvoton NCT677x Super-I/O chips * * Copyright (C) 2012 Guenter Roeck <[email protected]> */ #define pr_fmt(fmt) … #include <linux/acpi.h> #include <linux/dmi.h> #include <linux/hwmon-sysfs.h> #include <linux/hwmon-vid.h> #include <linux/init.h> #include <linux/io.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include "nct6775.h" enum sensor_access { … }; static const char * const nct6775_sio_names[] __initconst = …; static unsigned short force_id; module_param(force_id, ushort, 0); MODULE_PARM_DESC(…) …; static unsigned short fan_debounce; module_param(fan_debounce, ushort, 0); MODULE_PARM_DESC(…) …; #define DRVNAME … #define NCT6775_PORT_CHIPID … /* * ISA constants */ #define IOREGION_ALIGNMENT … #define IOREGION_OFFSET … #define IOREGION_LENGTH … #define ADDR_REG_OFFSET … #define DATA_REG_OFFSET … /* * Super-I/O constants and functions */ #define NCT6775_LD_ACPI … #define NCT6775_LD_HWM … #define NCT6775_LD_VID … #define NCT6775_LD_12 … #define SIO_REG_LDSEL … #define SIO_REG_DEVID … #define SIO_REG_ENABLE … #define SIO_REG_ADDR … #define SIO_NCT6106_ID … #define SIO_NCT6116_ID … #define SIO_NCT6775_ID … #define SIO_NCT6776_ID … #define SIO_NCT6779_ID … #define SIO_NCT6791_ID … #define SIO_NCT6792_ID … #define SIO_NCT6793_ID … #define SIO_NCT6795_ID … #define SIO_NCT6796_ID … #define SIO_NCT6797_ID … #define SIO_NCT6798_ID … #define SIO_NCT6799_ID … #define SIO_ID_MASK … /* * Control registers */ #define NCT6775_REG_CR_FAN_DEBOUNCE … struct nct6775_sio_data { … }; #define ASUSWMI_METHOD … #define ASUSWMI_METHODID_RSIO … #define ASUSWMI_METHODID_WSIO … #define ASUSWMI_METHODID_RHWM … #define ASUSWMI_METHODID_WHWM … #define ASUSWMI_UNSUPPORTED_METHOD … #define ASUSWMI_DEVICE_HID … #define ASUSWMI_DEVICE_UID … #define ASUSMSI_DEVICE_UID … #if IS_ENABLED(CONFIG_ACPI) /* * ASUS boards have only one device with WMI "WMBD" method and have provided * access to only one SuperIO chip at 0x0290. */ static struct acpi_device *asus_acpi_dev; #endif static int nct6775_asuswmi_evaluate_method(u32 method_id, u8 bank, u8 reg, u8 val, u32 *retval) { … } static inline int nct6775_asuswmi_write(u8 bank, u8 reg, u8 val) { … } static inline int nct6775_asuswmi_read(u8 bank, u8 reg, u8 *val) { … } static int superio_wmi_inb(struct nct6775_sio_data *sio_data, int reg) { … } static void superio_wmi_outb(struct nct6775_sio_data *sio_data, int reg, int val) { … } static void superio_wmi_select(struct nct6775_sio_data *sio_data, int ld) { … } static int superio_wmi_enter(struct nct6775_sio_data *sio_data) { … } static void superio_wmi_exit(struct nct6775_sio_data *sio_data) { … } static void superio_outb(struct nct6775_sio_data *sio_data, int reg, int val) { … } static int superio_inb(struct nct6775_sio_data *sio_data, int reg) { … } static void superio_select(struct nct6775_sio_data *sio_data, int ld) { … } static int superio_enter(struct nct6775_sio_data *sio_data) { … } static void superio_exit(struct nct6775_sio_data *sio_data) { … } static inline void nct6775_wmi_set_bank(struct nct6775_data *data, u16 reg) { … } static int nct6775_wmi_reg_read(void *ctx, unsigned int reg, unsigned int *val) { … } static int nct6775_wmi_reg_write(void *ctx, unsigned int reg, unsigned int value) { … } /* * On older chips, only registers 0x50-0x5f are banked. * On more recent chips, all registers are banked. * Assume that is the case and set the bank number for each access. * Cache the bank number so it only needs to be set if it changes. */ static inline void nct6775_set_bank(struct nct6775_data *data, u16 reg) { … } static int nct6775_reg_read(void *ctx, unsigned int reg, unsigned int *val) { … } static int nct6775_reg_write(void *ctx, unsigned int reg, unsigned int value) { … } static void nct6791_enable_io_mapping(struct nct6775_sio_data *sio_data) { … } static int nct6775_suspend(struct device *dev) { … } static int nct6775_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(nct6775_dev_pm_ops, nct6775_suspend, nct6775_resume); static void nct6775_check_fan_inputs(struct nct6775_data *data, struct nct6775_sio_data *sio_data) { … } static ssize_t cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(cpu0_vid); /* Case open detection */ static const u8 NCT6775_REG_CR_CASEOPEN_CLR[] = …; static const u8 NCT6775_CR_CASEOPEN_CLR_MASK[] = …; static ssize_t clear_caseopen(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static SENSOR_DEVICE_ATTR(intrusion0_alarm, 0644, nct6775_show_alarm, clear_caseopen, INTRUSION_ALARM_BASE); static SENSOR_DEVICE_ATTR(intrusion1_alarm, 0644, nct6775_show_alarm, clear_caseopen, INTRUSION_ALARM_BASE + 1); static SENSOR_DEVICE_ATTR(intrusion0_beep, 0644, nct6775_show_beep, nct6775_store_beep, INTRUSION_ALARM_BASE); static SENSOR_DEVICE_ATTR(intrusion1_beep, 0644, nct6775_show_beep, nct6775_store_beep, INTRUSION_ALARM_BASE + 1); static SENSOR_DEVICE_ATTR(beep_enable, 0644, nct6775_show_beep, nct6775_store_beep, BEEP_ENABLE_BASE); static umode_t nct6775_other_is_visible(struct kobject *kobj, struct attribute *attr, int index) { … } /* * nct6775_other_is_visible uses the index into the following array * to determine if attributes should be created or not. * Any change in order or content must be matched. */ static struct attribute *nct6775_attributes_other[] = …; static const struct attribute_group nct6775_group_other = …; static int nct6775_platform_probe_init(struct nct6775_data *data) { … } static const struct regmap_config nct6775_regmap_config = …; static const struct regmap_config nct6775_wmi_regmap_config = …; static int nct6775_platform_probe(struct platform_device *pdev) { … } static struct platform_driver nct6775_driver = …; /* nct6775_find() looks for a '627 in the Super-I/O config space */ static int __init nct6775_find(int sioaddr, struct nct6775_sio_data *sio_data) { … } /* * when Super-I/O functions move to a separate file, the Super-I/O * bus will manage the lifetime of the device and this module will only keep * track of the nct6775 driver. But since we use platform_device_alloc(), we * must keep track of the device */ static struct platform_device *pdev[2]; static const char * const asus_wmi_boards[] = …; static const char * const asus_msi_boards[] = …; #if IS_ENABLED(CONFIG_ACPI) /* * Callback for acpi_bus_for_each_dev() to find the right device * by _UID and _HID and return 1 to stop iteration. */ static int nct6775_asuswmi_device_match(struct device *dev, void *data) { … } #endif static enum sensor_access nct6775_determine_access(const char *device_uid) { … } static int __init sensors_nct6775_platform_init(void) { … } static void __exit sensors_nct6775_platform_exit(void) { … } MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_IMPORT_NS(…); module_init(…) …; module_exit(sensors_nct6775_platform_exit);
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