// SPDX-License-Identifier: GPL-2.0-or-later /* * vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware * monitoring features * Copyright (C) 2006 Juerg Haefliger <[email protected]> * * This driver is based on the driver for kernel 2.4 by Mark D. Studebaker * and its port to kernel 2.6 by Lars Ekman. */ #define pr_fmt(fmt) … #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/platform_device.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/hwmon-vid.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/ioport.h> #include <linux/acpi.h> #include <linux/io.h> static int uch_config = …; module_param(uch_config, int, 0); MODULE_PARM_DESC(…) …; static int int_mode = …; module_param(int_mode, int, 0); MODULE_PARM_DESC(…) …; static unsigned short force_id; module_param(force_id, ushort, 0); MODULE_PARM_DESC(…) …; static struct platform_device *pdev; #define DRVNAME … /* --------------------------------------------------------------------- * Registers * * The sensors are defined as follows. * * Sensor Voltage Mode Temp Mode Notes (from the datasheet) * -------- ------------ --------- -------------------------- * Reading 1 temp1 Intel thermal diode * Reading 3 temp2 Internal thermal diode * UCH1/Reading2 in0 temp3 NTC type thermistor * UCH2 in1 temp4 +2.5V * UCH3 in2 temp5 VccP * UCH4 in3 temp6 +5V * UCH5 in4 temp7 +12V * 3.3V in5 Internal VDD (+3.3V) * * --------------------------------------------------------------------- */ /* Voltages (in) numbered 0-5 (ix) */ #define VT1211_REG_IN(ix) … #define VT1211_REG_IN_MIN(ix) … #define VT1211_REG_IN_MAX(ix) … /* Temperatures (temp) numbered 0-6 (ix) */ static u8 regtemp[] = …; static u8 regtempmax[] = …; static u8 regtemphyst[] = …; /* Fans numbered 0-1 (ix) */ #define VT1211_REG_FAN(ix) … #define VT1211_REG_FAN_MIN(ix) … #define VT1211_REG_FAN_DIV … /* PWMs numbered 0-1 (ix) */ /* Auto points numbered 0-3 (ap) */ #define VT1211_REG_PWM(ix) … #define VT1211_REG_PWM_CLK … #define VT1211_REG_PWM_CTL … #define VT1211_REG_PWM_AUTO_TEMP(ap) … #define VT1211_REG_PWM_AUTO_PWM(ix, ap) … /* Miscellaneous registers */ #define VT1211_REG_CONFIG … #define VT1211_REG_ALARM1 … #define VT1211_REG_ALARM2 … #define VT1211_REG_VID … #define VT1211_REG_UCH_CONFIG … #define VT1211_REG_TEMP1_CONFIG … #define VT1211_REG_TEMP2_CONFIG … /* In, temp & fan alarm bits */ static const u8 bitalarmin[] = …; static const u8 bitalarmtemp[] = …; static const u8 bitalarmfan[] = …; /* --------------------------------------------------------------------- * Data structures and manipulation thereof * --------------------------------------------------------------------- */ struct vt1211_data { … }; /* ix = [0-5] */ #define ISVOLT(ix, uch_config) … /* ix = [0-6] */ #define ISTEMP(ix, uch_config) … /* * in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the * driver according to the VT1211 BIOS porting guide */ #define IN_FROM_REG(ix, reg) … #define IN_TO_REG(ix, val) … /* * temp1 (ix = 0) is an intel thermal diode which is scaled in user space. * temp2 (ix = 1) is the internal temp diode so it's scaled in the driver * according to some measurements that I took on an EPIA M10000. * temp3-7 are thermistor based so the driver returns the voltage measured at * the pin (range 0V - 2.2V). */ #define TEMP_FROM_REG(ix, reg) … #define TEMP_TO_REG(ix, val) … #define DIV_FROM_REG(reg) … #define RPM_FROM_REG(reg, div) … #define RPM_TO_REG(val, div) … /* --------------------------------------------------------------------- * Super-I/O constants and functions * --------------------------------------------------------------------- */ /* * Configuration index port registers * The vt1211 can live at 2 different addresses so we need to probe both */ #define SIO_REG_CIP1 … #define SIO_REG_CIP2 … /* Configuration registers */ #define SIO_VT1211_LDN … #define SIO_VT1211_DEVID … #define SIO_VT1211_DEVREV … #define SIO_VT1211_ACTIVE … #define SIO_VT1211_BADDR … #define SIO_VT1211_ID … /* VT1211 logical device numbers */ #define SIO_VT1211_LDN_HWMON … static inline int superio_inb(int sio_cip, int reg) { … } static inline void superio_select(int sio_cip, int ldn) { … } static inline int superio_enter(int sio_cip) { … } static inline void superio_exit(int sio_cip) { … } /* --------------------------------------------------------------------- * Device I/O access * --------------------------------------------------------------------- */ static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg) { … } static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val) { … } static struct vt1211_data *vt1211_update_device(struct device *dev) { … } /* --------------------------------------------------------------------- * Voltage sysfs interfaces * ix = [0-5] * --------------------------------------------------------------------- */ #define SHOW_IN_INPUT … #define SHOW_SET_IN_MIN … #define SHOW_SET_IN_MAX … #define SHOW_IN_ALARM … static ssize_t show_in(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t set_in(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } /* --------------------------------------------------------------------- * Temperature sysfs interfaces * ix = [0-6] * --------------------------------------------------------------------- */ #define SHOW_TEMP_INPUT … #define SHOW_SET_TEMP_MAX … #define SHOW_SET_TEMP_MAX_HYST … #define SHOW_TEMP_ALARM … static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t set_temp(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } /* --------------------------------------------------------------------- * Fan sysfs interfaces * ix = [0-1] * --------------------------------------------------------------------- */ #define SHOW_FAN_INPUT … #define SHOW_SET_FAN_MIN … #define SHOW_SET_FAN_DIV … #define SHOW_FAN_ALARM … static ssize_t show_fan(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t set_fan(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } /* --------------------------------------------------------------------- * PWM sysfs interfaces * ix = [0-1] * --------------------------------------------------------------------- */ #define SHOW_PWM … #define SHOW_SET_PWM_ENABLE … #define SHOW_SET_PWM_FREQ … #define SHOW_SET_PWM_AUTO_CHANNELS_TEMP … static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } /* --------------------------------------------------------------------- * PWM auto point definitions * ix = [0-1] * ap = [0-3] * --------------------------------------------------------------------- */ /* * pwm[ix+1]_auto_point[ap+1]_temp mapping table: * Note that there is only a single set of temp auto points that controls both * PWM controllers. We still create 2 sets of sysfs files to make it look * more consistent even though they map to the same registers. * * ix ap : description * ------------------- * 0 0 : pwm1/2 off temperature (pwm_auto_temp[0]) * 0 1 : pwm1/2 low speed temperature (pwm_auto_temp[1]) * 0 2 : pwm1/2 high speed temperature (pwm_auto_temp[2]) * 0 3 : pwm1/2 full speed temperature (pwm_auto_temp[3]) * 1 0 : pwm1/2 off temperature (pwm_auto_temp[0]) * 1 1 : pwm1/2 low speed temperature (pwm_auto_temp[1]) * 1 2 : pwm1/2 high speed temperature (pwm_auto_temp[2]) * 1 3 : pwm1/2 full speed temperature (pwm_auto_temp[3]) */ static ssize_t show_pwm_auto_point_temp(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t set_pwm_auto_point_temp(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } /* * pwm[ix+1]_auto_point[ap+1]_pwm mapping table: * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't * be changed. * * ix ap : description * ------------------- * 0 0 : pwm1 off (pwm_auto_pwm[0][0], hard-wired to 0) * 0 1 : pwm1 low speed duty cycle (pwm_auto_pwm[0][1]) * 0 2 : pwm1 high speed duty cycle (pwm_auto_pwm[0][2]) * 0 3 : pwm1 full speed (pwm_auto_pwm[0][3], hard-wired to 255) * 1 0 : pwm2 off (pwm_auto_pwm[1][0], hard-wired to 0) * 1 1 : pwm2 low speed duty cycle (pwm_auto_pwm[1][1]) * 1 2 : pwm2 high speed duty cycle (pwm_auto_pwm[1][2]) * 1 3 : pwm2 full speed (pwm_auto_pwm[1][3], hard-wired to 255) */ static ssize_t show_pwm_auto_point_pwm(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t set_pwm_auto_point_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } /* --------------------------------------------------------------------- * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms) * --------------------------------------------------------------------- */ static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) { … } /* --------------------------------------------------------------------- * Device attribute structs * --------------------------------------------------------------------- */ #define SENSOR_ATTR_IN(ix) … static struct sensor_device_attribute_2 vt1211_sysfs_in[][4] = …; #define IN_UNIT_ATTRS(X) … static struct attribute *vt1211_in_attr[][5] = …; static const struct attribute_group vt1211_in_attr_group[] = …; #define SENSOR_ATTR_TEMP(ix) … static struct sensor_device_attribute_2 vt1211_sysfs_temp[][4] = …; #define TEMP_UNIT_ATTRS(X) … static struct attribute *vt1211_temp_attr[][5] = …; static const struct attribute_group vt1211_temp_attr_group[] = …; #define SENSOR_ATTR_FAN(ix) … #define SENSOR_ATTR_PWM(ix) … #define SENSOR_ATTR_PWM_FREQ(ix) … #define SENSOR_ATTR_PWM_FREQ_RO(ix) … #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) … #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) … #define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) … #define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) … static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = …; static struct device_attribute vt1211_sysfs_misc[] = …; /* --------------------------------------------------------------------- * Device registration and initialization * --------------------------------------------------------------------- */ static void vt1211_init_device(struct vt1211_data *data) { … } static void vt1211_remove_sysfs(struct platform_device *pdev) { … } static int vt1211_probe(struct platform_device *pdev) { … } static void vt1211_remove(struct platform_device *pdev) { … } static struct platform_driver vt1211_driver = …; static int __init vt1211_device_add(unsigned short address) { … } static int __init vt1211_find(int sio_cip, unsigned short *address) { … } static int __init vt1211_init(void) { … } static void __exit vt1211_exit(void) { … } MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; module_init(…) …; module_exit(vt1211_exit);
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