// SPDX-License-Identifier: GPL-2.0-or-later /* * w83791d.c - Part of lm_sensors, Linux kernel modules for hardware * monitoring * * Copyright (C) 2006-2007 Charles Spirakis <[email protected]> */ /* * Supports following chips: * * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA * w83791d 10 5 5 3 0x71 0x5ca3 yes no * * The w83791d chip appears to be part way between the 83781d and the * 83792d. Thus, this file is derived from both the w83792d.c and * w83781d.c files. * * The w83791g chip is the same as the w83791d but lead-free. */ #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-vid.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/jiffies.h> #define NUMBER_OF_VIN … #define NUMBER_OF_FANIN … #define NUMBER_OF_TEMPIN … #define NUMBER_OF_PWM … /* Addresses to scan */ static const unsigned short normal_i2c[] = …; /* Insmod parameters */ static unsigned short force_subclients[4]; module_param_array(…); MODULE_PARM_DESC(…) …; static bool reset; module_param(reset, bool, 0); MODULE_PARM_DESC(…) …; static bool init; module_param(init, bool, 0); MODULE_PARM_DESC(…) …; /* The W83791D registers */ static const u8 W83791D_REG_IN[NUMBER_OF_VIN] = …; static const u8 W83791D_REG_IN_MAX[NUMBER_OF_VIN] = …; static const u8 W83791D_REG_IN_MIN[NUMBER_OF_VIN] = …; static const u8 W83791D_REG_FAN[NUMBER_OF_FANIN] = …; static const u8 W83791D_REG_FAN_MIN[NUMBER_OF_FANIN] = …; static const u8 W83791D_REG_PWM[NUMBER_OF_PWM] = …; static const u8 W83791D_REG_TEMP_TARGET[3] = …; static const u8 W83791D_REG_TEMP_TOL[2] = …; static const u8 W83791D_REG_FAN_CFG[2] = …; static const u8 W83791D_REG_FAN_DIV[3] = …; #define W83791D_REG_BANK … #define W83791D_REG_TEMP2_CONFIG … #define W83791D_REG_TEMP3_CONFIG … static const u8 W83791D_REG_TEMP1[3] = …; static const u8 W83791D_REG_TEMP_ADD[2][6] = …; #define W83791D_REG_BEEP_CONFIG … static const u8 W83791D_REG_BEEP_CTRL[3] = …; #define W83791D_REG_GPIO … #define W83791D_REG_CONFIG … #define W83791D_REG_VID_FANDIV … #define W83791D_REG_DID_VID4 … #define W83791D_REG_WCHIPID … #define W83791D_REG_CHIPMAN … #define W83791D_REG_PIN … #define W83791D_REG_I2C_SUBADDR … #define W83791D_REG_ALARM1 … #define W83791D_REG_ALARM2 … #define W83791D_REG_ALARM3 … #define W83791D_REG_VBAT … #define W83791D_REG_I2C_ADDR … /* * The SMBus locks itself. The Winbond W83791D has a bank select register * (index 0x4e), but the driver only accesses registers in bank 0. Since * we don't switch banks, we don't need any special code to handle * locking access between bank switches */ static inline int w83791d_read(struct i2c_client *client, u8 reg) { … } static inline int w83791d_write(struct i2c_client *client, u8 reg, u8 value) { … } /* * The analog voltage inputs have 16mV LSB. Since the sysfs output is * in mV as would be measured on the chip input pin, need to just * multiply/divide by 16 to translate from/to register values. */ #define IN_TO_REG(val) … #define IN_FROM_REG(val) … static u8 fan_to_reg(long rpm, int div) { … } #define FAN_FROM_REG(val, div) … /* for temp1 which is 8-bit resolution, LSB = 1 degree Celsius */ #define TEMP1_FROM_REG(val) … #define TEMP1_TO_REG(val) … /* * for temp2 and temp3 which are 9-bit resolution, LSB = 0.5 degree Celsius * Assumes the top 8 bits are the integral amount and the bottom 8 bits * are the fractional amount. Since we only have 0.5 degree resolution, * the bottom 7 bits will always be zero */ #define TEMP23_FROM_REG(val) … #define TEMP23_TO_REG(val) … /* for thermal cruise target temp, 7-bits, LSB = 1 degree Celsius */ #define TARGET_TEMP_TO_REG(val) … /* for thermal cruise temp tolerance, 4-bits, LSB = 1 degree Celsius */ #define TOL_TEMP_TO_REG(val) … #define BEEP_MASK_TO_REG(val) … #define BEEP_MASK_FROM_REG(val) … #define DIV_FROM_REG(val) … static u8 div_to_reg(int nr, long val) { … } struct w83791d_data { … }; static int w83791d_probe(struct i2c_client *client); static int w83791d_detect(struct i2c_client *client, struct i2c_board_info *info); static void w83791d_remove(struct i2c_client *client); static int w83791d_read(struct i2c_client *client, u8 reg); static int w83791d_write(struct i2c_client *client, u8 reg, u8 value); static struct w83791d_data *w83791d_update_device(struct device *dev); #ifdef DEBUG static void w83791d_print_debug(struct w83791d_data *data, struct device *dev); #endif static void w83791d_init_client(struct i2c_client *client); static const struct i2c_device_id w83791d_id[] = …; MODULE_DEVICE_TABLE(i2c, w83791d_id); static struct i2c_driver w83791d_driver = …; /* following are the sysfs callback functions */ #define show_in_reg(reg) … show_in_reg(in); show_in_reg(in_min); show_in_reg(in_max); #define store_in_reg(REG, reg) … store_in_reg(MIN, min); store_in_reg(MAX, max); static struct sensor_device_attribute sda_in_input[] = …; static struct sensor_device_attribute sda_in_min[] = …; static struct sensor_device_attribute sda_in_max[] = …; static ssize_t show_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) { … } static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, char *buf) { … } /* * Note: The bitmask for the beep enable/disable is different than * the bitmask for the alarm. */ static struct sensor_device_attribute sda_in_beep[] = …; static struct sensor_device_attribute sda_in_alarm[] = …; #define show_fan_reg(reg) … show_fan_reg(fan); show_fan_reg(fan_min); static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, char *buf) { … } /* * Note: we save and restore the fan minimum here, because its value is * determined in part by the fan divisor. This follows the principle of * least surprise; the user doesn't expect the fan minimum to change just * because the divisor changed. */ static ssize_t store_fan_div(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static struct sensor_device_attribute sda_fan_input[] = …; static struct sensor_device_attribute sda_fan_min[] = …; static struct sensor_device_attribute sda_fan_div[] = …; static struct sensor_device_attribute sda_fan_beep[] = …; static struct sensor_device_attribute sda_fan_alarm[] = …; /* read/write PWMs */ 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 struct sensor_device_attribute sda_pwm[] = …; static ssize_t show_pwmenable(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_pwmenable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static struct sensor_device_attribute sda_pwmenable[] = …; /* For Smart Fan I / Thermal Cruise */ static ssize_t show_temp_target(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_temp_target(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static struct sensor_device_attribute sda_temp_target[] = …; static ssize_t show_temp_tolerance(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_temp_tolerance(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static struct sensor_device_attribute sda_temp_tolerance[] = …; /* read/write the temperature1, includes measured value and limits */ static ssize_t show_temp1(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t store_temp1(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } /* read/write temperature2-3, includes measured value and limits */ static ssize_t show_temp23(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t store_temp23(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } static struct sensor_device_attribute_2 sda_temp_input[] = …; static struct sensor_device_attribute_2 sda_temp_max[] = …; static struct sensor_device_attribute_2 sda_temp_max_hyst[] = …; /* * Note: The bitmask for the beep enable/disable is different than * the bitmask for the alarm. */ static struct sensor_device_attribute sda_temp_beep[] = …; static struct sensor_device_attribute sda_temp_alarm[] = …; /* get realtime status of all sensors items: voltage, temp, fan */ static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(alarms); /* Beep control */ #define GLOBAL_BEEP_ENABLE_SHIFT … #define GLOBAL_BEEP_ENABLE_MASK … static ssize_t show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t show_beep_mask(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_beep_mask(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t store_beep_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static struct sensor_device_attribute sda_beep_ctrl[] = …; /* cpu voltage regulation information */ static ssize_t cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(cpu0_vid); static ssize_t vrm_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(vrm); #define IN_UNIT_ATTRS(X) … #define FAN_UNIT_ATTRS(X) … #define TEMP_UNIT_ATTRS(X) … static struct attribute *w83791d_attributes[] = …; static const struct attribute_group w83791d_group = …; /* * Separate group of attributes for fan/pwm 4-5. Their pins can also be * in use for GPIO in which case their sysfs-interface should not be made * available */ static struct attribute *w83791d_attributes_fanpwm45[] = …; static const struct attribute_group w83791d_group_fanpwm45 = …; static int w83791d_detect_subclients(struct i2c_client *client) { … } /* Return 0 if detection is successful, -ENODEV otherwise */ static int w83791d_detect(struct i2c_client *client, struct i2c_board_info *info) { … } static int w83791d_probe(struct i2c_client *client) { … } static void w83791d_remove(struct i2c_client *client) { … } static void w83791d_init_client(struct i2c_client *client) { … } static struct w83791d_data *w83791d_update_device(struct device *dev) { … } #ifdef DEBUG static void w83791d_print_debug(struct w83791d_data *data, struct device *dev) { … } #endif module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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