// SPDX-License-Identifier: GPL-2.0-only /* * w83793.c - Linux kernel driver for hardware monitoring * Copyright (C) 2006 Winbond Electronics Corp. * Yuan Mu * Rudolf Marek <[email protected]> * Copyright (C) 2009-2010 Sven Anders <[email protected]>, ANDURAS AG. * Watchdog driver part * (Based partially on fschmd driver, * Copyright 2007-2008 by Hans de Goede) */ /* * Supports following chips: * * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA * w83793 10 12 8 6 0x7b 0x5ca3 yes no */ #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/fs.h> #include <linux/watchdog.h> #include <linux/miscdevice.h> #include <linux/uaccess.h> #include <linux/kref.h> #include <linux/notifier.h> #include <linux/reboot.h> #include <linux/jiffies.h> /* Default values */ #define WATCHDOG_TIMEOUT … /* 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 int timeout = …; /* default timeout in minutes */ module_param(timeout, int, 0); MODULE_PARM_DESC(…) …; static bool nowayout = … WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0); MODULE_PARM_DESC(…) …; /* * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved * as ID, Bank Select registers */ #define W83793_REG_BANKSEL … #define W83793_REG_VENDORID … #define W83793_REG_CHIPID … #define W83793_REG_DEVICEID … #define W83793_REG_CONFIG … #define W83793_REG_MFC … #define W83793_REG_FANIN_CTRL … #define W83793_REG_FANIN_SEL … #define W83793_REG_I2C_ADDR … #define W83793_REG_I2C_SUBADDR … #define W83793_REG_VID_INA … #define W83793_REG_VID_INB … #define W83793_REG_VID_LATCHA … #define W83793_REG_VID_LATCHB … #define W83793_REG_VID_CTRL … #define W83793_REG_WDT_LOCK … #define W83793_REG_WDT_ENABLE … #define W83793_REG_WDT_STATUS … #define W83793_REG_WDT_TIMEOUT … static u16 W83793_REG_TEMP_MODE[2] = …; #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 u16 W83793_REG_TEMP[][5] = …; #define W83793_REG_TEMP_LOW_BITS … #define W83793_REG_BEEP(index) … #define W83793_REG_ALARM(index) … #define W83793_REG_CLR_CHASSIS … #define W83793_REG_IRQ_CTRL … #define W83793_REG_OVT_CTRL … #define W83793_REG_OVT_BEEP … #define IN_READ … #define IN_MAX … #define IN_LOW … static const u16 W83793_REG_IN[][3] = …; /* Low Bits of Vcore A/B Vtt Read/High/Low */ static const u16 W83793_REG_IN_LOW_BITS[] = …; static u8 scale_in[] = …; static u8 scale_in_add[] = …; #define W83793_REG_FAN(index) … #define W83793_REG_FAN_MIN(index) … #define W83793_REG_PWM_DEFAULT … #define W83793_REG_PWM_ENABLE … #define W83793_REG_PWM_UPTIME … #define W83793_REG_PWM_DOWNTIME … #define W83793_REG_TEMP_CRITICAL … #define PWM_DUTY … #define PWM_START … #define PWM_NONSTOP … #define PWM_STOP_TIME … #define W83793_REG_PWM(index, nr) … /* bit field, fan1 is bit0, fan2 is bit1 ... */ #define W83793_REG_TEMP_FAN_MAP(index) … #define W83793_REG_TEMP_TOL(index) … #define W83793_REG_TEMP_CRUISE(index) … #define W83793_REG_PWM_STOP_TIME(index) … #define W83793_REG_SF2_TEMP(index, nr) … #define W83793_REG_SF2_PWM(index, nr) … 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) { … } struct w83793_data { … }; /* * Somewhat ugly :( global data pointer list with all devices, so that * we can find our device data as when using misc_register. There is no * other method to get to one's device data from the open file-op and * for usage in the reboot notifier callback. */ static LIST_HEAD(watchdog_data_list); /* Note this lock not only protect list access, but also data.kref access */ static DEFINE_MUTEX(watchdog_data_mutex); /* * Release our data struct when we're detached from the i2c client *and* all * references to our watchdog device are released */ static void w83793_release_resources(struct kref *ref) { … } static u8 w83793_read_value(struct i2c_client *client, u16 reg); static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value); static int w83793_probe(struct i2c_client *client); static int w83793_detect(struct i2c_client *client, struct i2c_board_info *info); static void w83793_remove(struct i2c_client *client); static void w83793_init_client(struct i2c_client *client); static void w83793_update_nonvolatile(struct device *dev); static struct w83793_data *w83793_update_device(struct device *dev); static const struct i2c_device_id w83793_id[] = …; MODULE_DEVICE_TABLE(i2c, w83793_id); static struct i2c_driver w83793_driver = …; static ssize_t vrm_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t show_vid(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) { … } #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) { … } static ssize_t show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_beep_enable(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_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) { … } /* * TD1-TD4 * each has 4 mode:(2 bits) * 0: Stop monitor * 1: Use internal temp sensor(default) * 2: Reserved * 3: Use sensor in Intel CPU and get result by PECI * * TR1-TR2 * each has 2 mode:(1 bit) * 0: Disable temp sensor monitor * 1: To enable temp sensors monitor */ /* 0 disable, 6 PECI */ static u8 TO_TEMP_MODE[] = …; static ssize_t show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_temp_mode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } #define SETUP_PWM_DEFAULT … #define SETUP_PWM_UPTIME … #define SETUP_PWM_DOWNTIME … #define SETUP_TEMP_CRITICAL … 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) { … } /* * Temp SmartFan control * TEMP_FAN_MAP * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1... * It's possible two or more temp channels control the same fan, w83793 * always prefers to pick the most critical request and applies it to * the related Fan. * It's possible one fan is not in any mapping of 6 temp channels, this * means the fan is manual mode * * TEMP_PWM_ENABLE * Each temp channel has its own SmartFan mode, and temp channel * control fans that are set by TEMP_FAN_MAP * 0: SmartFanII mode * 1: Thermal Cruise Mode * * TEMP_CRUISE * Target temperature in thermal cruise mode, w83793 will try to turn * fan speed to keep the temperature of target device around this * temperature. * * TEMP_TOLERANCE * If Temp higher or lower than target with this tolerance, w83793 * will take actions to speed up or slow down the fan to keep the * temperature within the tolerance range. */ #define TEMP_FAN_MAP … #define TEMP_PWM_ENABLE … #define TEMP_CRUISE … #define TEMP_TOLERANCE … static ssize_t show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_sf_ctrl(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_sf2_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_sf2_temp(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } /* only Vcore A/B and Vtt have additional 2 bits precision */ 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) { … } #define NOT_USED … #define SENSOR_ATTR_IN(index) … #define SENSOR_ATTR_FAN(index) … #define SENSOR_ATTR_PWM(index) … #define SENSOR_ATTR_TEMP(index) … static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = …; static struct sensor_device_attribute_2 w83793_temp[] = …; /* Fan6-Fan12 */ static struct sensor_device_attribute_2 w83793_left_fan[] = …; /* Pwm4-Pwm8 */ static struct sensor_device_attribute_2 w83793_left_pwm[] = …; static struct sensor_device_attribute_2 w83793_vid[] = …; static DEVICE_ATTR_RW(vrm); static struct sensor_device_attribute_2 sda_single_files[] = …; static void w83793_init_client(struct i2c_client *client) { … } /* * Watchdog routines */ static int watchdog_set_timeout(struct w83793_data *data, int timeout) { … } static int watchdog_get_timeout(struct w83793_data *data) { … } static int watchdog_trigger(struct w83793_data *data) { … } static int watchdog_enable(struct w83793_data *data) { … } static int watchdog_disable(struct w83793_data *data) { … } static int watchdog_open(struct inode *inode, struct file *filp) { … } static int watchdog_close(struct inode *inode, struct file *filp) { … } static ssize_t watchdog_write(struct file *filp, const char __user *buf, size_t count, loff_t *offset) { … } static long watchdog_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { … } static const struct file_operations watchdog_fops = …; /* * Notifier for system down */ static int watchdog_notify_sys(struct notifier_block *this, unsigned long code, void *unused) { … } /* * The WDT needs to learn about soft shutdowns in order to * turn the timebomb registers off. */ static struct notifier_block watchdog_notifier = …; /* * Init / remove routines */ static void w83793_remove(struct i2c_client *client) { … } static int w83793_detect_subclients(struct i2c_client *client) { … } /* Return 0 if detection is successful, -ENODEV otherwise */ static int w83793_detect(struct i2c_client *client, struct i2c_board_info *info) { … } static int w83793_probe(struct i2c_client *client) { … } static void w83793_update_nonvolatile(struct device *dev) { … } static struct w83793_data *w83793_update_device(struct device *dev) { … } /* * Ignore the possibility that somebody change bank outside the driver * Must be called with data->update_lock held, except during initialization */ static u8 w83793_read_value(struct i2c_client *client, u16 reg) { … } /* Must be called with data->update_lock held, except during initialization */ static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value) { … } module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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