// SPDX-License-Identifier: GPL-2.0-only /* * w83795.c - Linux kernel driver for hardware monitoring * Copyright (C) 2008 Nuvoton Technology Corp. * Wei Song * Copyright (C) 2010 Jean Delvare <[email protected]> * * Supports following chips: * * Chip #vin #fanin #pwm #temp #dts wchipid vendid i2c ISA * w83795g 21 14 8 6 8 0x79 0x5ca3 yes no * w83795adg 18 14 2 6 8 0x79 0x5ca3 yes no */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/jiffies.h> #include <linux/util_macros.h> /* Addresses to scan */ static const unsigned short normal_i2c[] = …; static bool reset; module_param(reset, bool, 0); MODULE_PARM_DESC(…) …; #define W83795_REG_BANKSEL … #define W83795_REG_VENDORID … #define W83795_REG_CHIPID … #define W83795_REG_DEVICEID … #define W83795_REG_DEVICEID_A … #define W83795_REG_I2C_ADDR … #define W83795_REG_CONFIG … #define W83795_REG_CONFIG_CONFIG48 … #define W83795_REG_CONFIG_START … /* Multi-Function Pin Ctrl Registers */ #define W83795_REG_VOLT_CTRL1 … #define W83795_REG_VOLT_CTRL2 … #define W83795_REG_TEMP_CTRL1 … #define W83795_REG_TEMP_CTRL2 … #define W83795_REG_FANIN_CTRL1 … #define W83795_REG_FANIN_CTRL2 … #define W83795_REG_VMIGB_CTRL … #define TEMP_READ … #define TEMP_CRIT … #define TEMP_CRIT_HYST … #define TEMP_WARN … #define TEMP_WARN_HYST … /* * only crit and crit_hyst affect real-time alarm status * current crit crit_hyst warn warn_hyst */ static const u16 W83795_REG_TEMP[][5] = …; #define IN_READ … #define IN_MAX … #define IN_LOW … static const u16 W83795_REG_IN[][3] = …; #define W83795_REG_VRLSB … static const u8 W83795_REG_IN_HL_LSB[] = …; #define IN_LSB_REG(index, type) … #define IN_LSB_SHIFT … #define IN_LSB_IDX … static const u8 IN_LSB_SHIFT_IDX[][2] = …; #define W83795_REG_FAN(index) … #define W83795_REG_FAN_MIN_HL(index) … #define W83795_REG_FAN_MIN_LSB(index) … #define W83795_REG_FAN_MIN_LSB_SHIFT(index) … #define W83795_REG_VID_CTRL … #define W83795_REG_ALARM_CTRL … #define ALARM_CTRL_RTSACS … #define W83795_REG_ALARM(index) … #define W83795_REG_CLR_CHASSIS … #define W83795_REG_BEEP(index) … #define W83795_REG_OVT_CFG … #define OVT_CFG_SEL … #define W83795_REG_FCMS1 … #define W83795_REG_FCMS2 … #define W83795_REG_TFMR(index) … #define W83795_REG_FOMC … #define W83795_REG_TSS(index) … #define TSS_MAP_RESERVED … static const u8 tss_map[4][6] = …; #define PWM_OUTPUT … #define PWM_FREQ … #define PWM_START … #define PWM_NONSTOP … #define PWM_STOP_TIME … #define W83795_REG_PWM(index, nr) … #define W83795_REG_FTSH(index) … #define W83795_REG_FTSL(index) … #define W83795_REG_TFTS … #define TEMP_PWM_TTTI … #define TEMP_PWM_CTFS … #define TEMP_PWM_HCT … #define TEMP_PWM_HOT … #define W83795_REG_TTTI(index) … #define W83795_REG_CTFS(index) … #define W83795_REG_HT(index) … #define SF4_TEMP … #define SF4_PWM … #define W83795_REG_SF4_TEMP(temp_num, index) … #define W83795_REG_SF4_PWM(temp_num, index) … #define W83795_REG_DTSC … #define W83795_REG_DTSE … #define W83795_REG_DTS(index) … #define W83795_REG_PECI_TBASE(index) … #define DTS_CRIT … #define DTS_CRIT_HYST … #define DTS_WARN … #define DTS_WARN_HYST … #define W83795_REG_DTS_EXT(index) … #define SETUP_PWM_DEFAULT … #define SETUP_PWM_UPTIME … #define SETUP_PWM_DOWNTIME … #define W83795_REG_SETUP_PWM(index) … static inline u16 in_from_reg(u8 index, u16 val) { … } static inline u16 in_to_reg(u8 index, u16 val) { … } static inline unsigned long fan_from_reg(u16 val) { … } static inline u16 fan_to_reg(long rpm) { … } static inline unsigned long time_from_reg(u8 reg) { … } static inline u8 time_to_reg(unsigned long val) { … } static inline long temp_from_reg(s8 reg) { … } static inline s8 temp_to_reg(long val, s8 min, s8 max) { … } static const u16 pwm_freq_cksel0[16] = …; static unsigned int pwm_freq_from_reg(u8 reg, u16 clkin) { … } static u8 pwm_freq_to_reg(unsigned long val, u16 clkin) { … } enum chip_types { … }; struct w83795_data { … }; /* * Hardware access * We assume that nobdody can change the bank outside the driver. */ /* Must be called with data->update_lock held, except during initialization */ static int w83795_set_bank(struct i2c_client *client, u8 bank) { … } /* Must be called with data->update_lock held, except during initialization */ static u8 w83795_read(struct i2c_client *client, u16 reg) { … } /* Must be called with data->update_lock held, except during initialization */ static int w83795_write(struct i2c_client *client, u16 reg, u8 value) { … } static void w83795_update_limits(struct i2c_client *client) { … } static struct w83795_data *w83795_update_pwm_config(struct device *dev) { … } static struct w83795_data *w83795_update_device(struct device *dev) { … } /* * Sysfs attributes */ #define ALARM_STATUS … #define BEEP_ENABLE … static ssize_t show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_beep(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } /* Write 0 to clear chassis alarm */ static ssize_t store_chassis_clear(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } #define FAN_INPUT … #define FAN_MIN … static ssize_t show_fan(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_pwm_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr, char *buf) { … } /* * Check whether a given temperature source can ever be useful. * Returns the number of selectable temperature channels which are * enabled. */ static int w83795_tss_useful(const struct w83795_data *data, int tsrc) { … } static ssize_t show_temp_src(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_temp_src(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } #define TEMP_PWM_ENABLE … #define TEMP_PWM_FAN_MAP … static ssize_t show_temp_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_temp_pwm_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } #define FANIN_TARGET … #define FANIN_TOL … static ssize_t show_fanin(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_fanin(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_temp_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_sf4_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_sf4_temp(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_temp(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t show_dts(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_dts_ext(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf) { … } /* Only for temp1-4 (temp5-6 can only be thermistor) */ static ssize_t store_temp_mode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } /* show/store VIN */ static ssize_t show_in(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_in(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } #ifdef CONFIG_SENSORS_W83795_FANCTRL static ssize_t show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_sf_setup(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } #endif #define NOT_USED … /* * Don't change the attribute order, _max, _min and _beep are accessed by index * somewhere else in the code */ #define SENSOR_ATTR_IN(index) … /* * Don't change the attribute order, _beep is accessed by index * somewhere else in the code */ #define SENSOR_ATTR_FAN(index) … #define SENSOR_ATTR_PWM(index) … /* * Don't change the attribute order, _beep is accessed by index * somewhere else in the code */ #define SENSOR_ATTR_DTS(index) … /* * Don't change the attribute order, _beep is accessed by index * somewhere else in the code */ #define SENSOR_ATTR_TEMP(index) … static struct sensor_device_attribute_2 w83795_in[][5] = …; static const struct sensor_device_attribute_2 w83795_fan[][4] = …; static const struct sensor_device_attribute_2 w83795_temp[][28] = …; static const struct sensor_device_attribute_2 w83795_dts[][8] = …; static const struct sensor_device_attribute_2 w83795_pwm[][8] = …; static const struct sensor_device_attribute_2 w83795_tss[6] = …; static const struct sensor_device_attribute_2 sda_single_files[] = …; static const struct sensor_device_attribute_2 sda_beep_files[] = …; /* * Driver interface */ static void w83795_init_client(struct i2c_client *client) { … } static int w83795_get_device_id(struct i2c_client *client) { … } /* Return 0 if detection is successful, -ENODEV otherwise */ static int w83795_detect(struct i2c_client *client, struct i2c_board_info *info) { … } #ifdef CONFIG_SENSORS_W83795_FANCTRL #define NUM_PWM_ATTRIBUTES … #define NUM_TEMP_ATTRIBUTES … #else #define NUM_PWM_ATTRIBUTES … #define NUM_TEMP_ATTRIBUTES … #endif static int w83795_handle_files(struct device *dev, int (*fn)(struct device *, const struct device_attribute *)) { … } /* We need a wrapper that fits in w83795_handle_files */ static int device_remove_file_wrapper(struct device *dev, const struct device_attribute *attr) { … } static void w83795_check_dynamic_in_limits(struct i2c_client *client) { … } /* Check pins that can be used for either temperature or voltage monitoring */ static void w83795_apply_temp_config(struct w83795_data *data, u8 config, int temp_chan, int in_chan) { … } static int w83795_probe(struct i2c_client *client) { … } static void w83795_remove(struct i2c_client *client) { … } static const struct i2c_device_id w83795_id[] = …; MODULE_DEVICE_TABLE(i2c, w83795_id); static struct i2c_driver w83795_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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