| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Rudolf Marek | 7466 | 69.08% | 2 | 5.88% |
| Sven Anders | 1836 | 16.99% | 1 | 2.94% |
| Jean Delvare | 571 | 5.28% | 9 | 26.47% |
| Gong Jun | 500 | 4.63% | 3 | 8.82% |
| Guenter Roeck | 394 | 3.65% | 3 | 8.82% |
| Axel Lin | 11 | 0.10% | 2 | 5.88% |
| Dan Carpenter | 5 | 0.05% | 2 | 5.88% |
| Tony Jones | 5 | 0.05% | 1 | 2.94% |
| Nicolas Kaiser | 4 | 0.04% | 1 | 2.94% |
| Julia Lawall | 3 | 0.03% | 1 | 2.94% |
| Wim Van Sebroeck | 2 | 0.02% | 1 | 2.94% |
| Thomas Gleixner | 2 | 0.02% | 1 | 2.94% |
| Arnd Bergmann | 2 | 0.02% | 1 | 2.94% |
| Frans Meulenbroeks | 1 | 0.01% | 1 | 2.94% |
| Colin Ian King | 1 | 0.01% | 1 | 2.94% |
| Mark M. Hoffman | 1 | 0.01% | 1 | 2.94% |
| Corentin Labbe | 1 | 0.01% | 1 | 2.94% |
| Kirill Smelkov | 1 | 0.01% | 1 | 2.94% |
| Rusty Russell | 1 | 0.01% | 1 | 2.94% |
| Total | 10807 | 34 |
// 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 <r.marek@assembler.cz> * Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, 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 2 /* 2 minute default timeout */ /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END }; /* Insmod parameters */ static unsigned short force_subclients[4]; module_param_array(force_subclients, short, NULL, 0); MODULE_PARM_DESC(force_subclients, "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}"); static bool reset; module_param(reset, bool, 0); MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); static int timeout = WATCHDOG_TIMEOUT; /* default timeout in minutes */ module_param(timeout, int, 0); MODULE_PARM_DESC(timeout, "Watchdog timeout in minutes. 2<= timeout <=255 (default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")"); static bool nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); /* * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved * as ID, Bank Select registers */ #define W83793_REG_BANKSEL 0x00 #define W83793_REG_VENDORID 0x0d #define W83793_REG_CHIPID 0x0e #define W83793_REG_DEVICEID 0x0f #define W83793_REG_CONFIG 0x40 #define W83793_REG_MFC 0x58 #define W83793_REG_FANIN_CTRL 0x5c #define W83793_REG_FANIN_SEL 0x5d #define W83793_REG_I2C_ADDR 0x0b #define W83793_REG_I2C_SUBADDR 0x0c #define W83793_REG_VID_INA 0x05 #define W83793_REG_VID_INB 0x06 #define W83793_REG_VID_LATCHA 0x07 #define W83793_REG_VID_LATCHB 0x08 #define W83793_REG_VID_CTRL 0x59 #define W83793_REG_WDT_LOCK 0x01 #define W83793_REG_WDT_ENABLE 0x02 #define W83793_REG_WDT_STATUS 0x03 #define W83793_REG_WDT_TIMEOUT 0x04 static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f }; #define TEMP_READ 0 #define TEMP_CRIT 1 #define TEMP_CRIT_HYST 2 #define TEMP_WARN 3 #define TEMP_WARN_HYST 4 /* * only crit and crit_hyst affect real-time alarm status * current crit crit_hyst warn warn_hyst */ static u16 W83793_REG_TEMP[][5] = { {0x1c, 0x78, 0x79, 0x7a, 0x7b}, {0x1d, 0x7c, 0x7d, 0x7e, 0x7f}, {0x1e, 0x80, 0x81, 0x82, 0x83}, {0x1f, 0x84, 0x85, 0x86, 0x87}, {0x20, 0x88, 0x89, 0x8a, 0x8b}, {0x21, 0x8c, 0x8d, 0x8e, 0x8f}, }; #define W83793_REG_TEMP_LOW_BITS 0x22 #define W83793_REG_BEEP(index) (0x53 + (index)) #define W83793_REG_ALARM(index) (0x4b + (index)) #define W83793_REG_CLR_CHASSIS 0x4a /* SMI MASK4 */ #define W83793_REG_IRQ_CTRL 0x50 #define W83793_REG_OVT_CTRL 0x51 #define W83793_REG_OVT_BEEP 0x52 #define IN_READ 0 #define IN_MAX 1 #define IN_LOW 2 static const u16 W83793_REG_IN[][3] = { /* Current, High, Low */ {0x10, 0x60, 0x61}, /* Vcore A */ {0x11, 0x62, 0x63}, /* Vcore B */ {0x12, 0x64, 0x65}, /* Vtt */ {0x14, 0x6a, 0x6b}, /* VSEN1 */ {0x15, 0x6c, 0x6d}, /* VSEN2 */ {0x16, 0x6e, 0x6f}, /* +3VSEN */ {0x17, 0x70, 0x71}, /* +12VSEN */ {0x18, 0x72, 0x73}, /* 5VDD */ {0x19, 0x74, 0x75}, /* 5VSB */ {0x1a, 0x76, 0x77}, /* VBAT */ }; /* Low Bits of Vcore A/B Vtt Read/High/Low */ static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 }; static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 }; static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 }; #define W83793_REG_FAN(index) (0x23 + 2 * (index)) /* High byte */ #define W83793_REG_FAN_MIN(index) (0x90 + 2 * (index)) /* High byte */ #define W83793_REG_PWM_DEFAULT 0xb2 #define W83793_REG_PWM_ENABLE 0x207 #define W83793_REG_PWM_UPTIME 0xc3 /* Unit in 0.1 second */ #define W83793_REG_PWM_DOWNTIME 0xc4 /* Unit in 0.1 second */ #define W83793_REG_TEMP_CRITICAL 0xc5 #define PWM_DUTY 0 #define PWM_START 1 #define PWM_NONSTOP 2 #define PWM_STOP_TIME 3 #define W83793_REG_PWM(index, nr) (((nr) == 0 ? 0xb3 : \ (nr) == 1 ? 0x220 : 0x218) + (index)) /* bit field, fan1 is bit0, fan2 is bit1 ... */ #define W83793_REG_TEMP_FAN_MAP(index) (0x201 + (index)) #define W83793_REG_TEMP_TOL(index) (0x208 + (index)) #define W83793_REG_TEMP_CRUISE(index) (0x210 + (index)) #define W83793_REG_PWM_STOP_TIME(index) (0x228 + (index)) #define W83793_REG_SF2_TEMP(index, nr) (0x230 + ((index) << 4) + (nr)) #define W83793_REG_SF2_PWM(index, nr) (0x238 + ((index) << 4) + (nr)) static inline unsigned long FAN_FROM_REG(u16 val) { if ((val >= 0xfff) || (val == 0)) return 0; return 1350000UL / val; } static inline u16 FAN_TO_REG(long rpm) { if (rpm <= 0) return 0x0fff; return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe); } static inline unsigned long TIME_FROM_REG(u8 reg) { return reg * 100; } static inline u8 TIME_TO_REG(unsigned long val) { return clamp_val((val + 50) / 100, 0, 0xff); } static inline long TEMP_FROM_REG(s8 reg) { return reg * 1000; } static inline s8 TEMP_TO_REG(long val, s8 min, s8 max) { return clamp_val((val + (val < 0 ? -500 : 500)) / 1000, min, max); } struct w83793_data { struct i2c_client *lm75[2]; struct device *hwmon_dev; struct mutex update_lock; char valid; /* !=0 if following fields are valid */ unsigned long last_updated; /* In jiffies */ unsigned long last_nonvolatile; /* In jiffies, last time we update the * nonvolatile registers */ u8 bank; u8 vrm; u8 vid[2]; u8 in[10][3]; /* Register value, read/high/low */ u8 in_low_bits[3]; /* Additional resolution for VCore A/B Vtt */ u16 has_fan; /* Only fan1- fan5 has own pins */ u16 fan[12]; /* Register value combine */ u16 fan_min[12]; /* Register value combine */ s8 temp[6][5]; /* current, crit, crit_hyst,warn, warn_hyst */ u8 temp_low_bits; /* Additional resolution TD1-TD4 */ u8 temp_mode[2]; /* byte 0: Temp D1-D4 mode each has 2 bits * byte 1: Temp R1,R2 mode, each has 1 bit */ u8 temp_critical; /* If reached all fan will be at full speed */ u8 temp_fan_map[6]; /* Temp controls which pwm fan, bit field */ u8 has_pwm; u8 has_temp; u8 has_vid; u8 pwm_enable; /* Register value, each Temp has 1 bit */ u8 pwm_uptime; /* Register value */ u8 pwm_downtime; /* Register value */ u8 pwm_default; /* All fan default pwm, next poweron valid */ u8 pwm[8][3]; /* Register value */ u8 pwm_stop_time[8]; u8 temp_cruise[6]; u8 alarms[5]; /* realtime status registers */ u8 beeps[5]; u8 beep_enable; u8 tolerance[3]; /* Temp tolerance(Smart Fan I/II) */ u8 sf2_pwm[6][7]; /* Smart FanII: Fan duty cycle */ u8 sf2_temp[6][7]; /* Smart FanII: Temp level point */ /* watchdog */ struct i2c_client *client; struct mutex watchdog_lock; struct list_head list; /* member of the watchdog_data_list */ struct kref kref; struct miscdevice watchdog_miscdev; unsigned long watchdog_is_open; char watchdog_expect_close; char watchdog_name[10]; /* must be unique to avoid sysfs conflict */ unsigned int watchdog_caused_reboot; int watchdog_timeout; /* watchdog timeout in minutes */ }; /* * 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) { struct w83793_data *data = container_of(ref, struct w83793_data, kref); kfree(data); } 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, const struct i2c_device_id *id); static int w83793_detect(struct i2c_client *client, struct i2c_board_info *info); static int 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[] = { { "w83793", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, w83793_id); static struct i2c_driver w83793_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "w83793", }, .probe = w83793_probe, .remove = w83793_remove, .id_table = w83793_id, .detect = w83793_detect, .address_list = normal_i2c, }; static ssize_t vrm_show(struct device *dev, struct device_attribute *attr, char *buf) { struct w83793_data *data = dev_get_drvdata(dev); return sprintf(buf, "%d\n", data->vrm); } static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) { struct w83793_data *data = w83793_update_device(dev); struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int index = sensor_attr->index; return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm)); } static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct w83793_data *data = dev_get_drvdata(dev); unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; if (val > 255) return -EINVAL; data->vrm = val; return count; } #define ALARM_STATUS 0 #define BEEP_ENABLE 1 static ssize_t show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf) { struct w83793_data *data = w83793_update_device(dev); struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index >> 3; int bit = sensor_attr->index & 0x07; u8 val; if (nr == ALARM_STATUS) { val = (data->alarms[index] >> (bit)) & 1; } else { /* BEEP_ENABLE */ val = (data->beeps[index] >> (bit)) & 1; } return sprintf(buf, "%u\n", val); } static ssize_t store_beep(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int index = sensor_attr->index >> 3; int shift = sensor_attr->index & 0x07; u8 beep_bit = 1 << shift; unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; if (val > 1) return -EINVAL; mutex_lock(&data->update_lock); data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index)); data->beeps[index] &= ~beep_bit; data->beeps[index] |= val << shift; w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]); mutex_unlock(&data->update_lock); return count; } static ssize_t show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf) { struct w83793_data *data = w83793_update_device(dev); return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01); } static ssize_t store_beep_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; if (val > 1) return -EINVAL; mutex_lock(&data->update_lock); data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP) & 0xfd; data->beep_enable |= val << 1; w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable); mutex_unlock(&data->update_lock); return 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) { struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); unsigned long val; u8 reg; int err; err = kstrtoul(buf, 10, &val); if (err) return err; if (val) return -EINVAL; mutex_lock(&data->update_lock); reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS); w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80); data->valid = 0; /* Force cache refresh */ mutex_unlock(&data->update_lock); return count; } #define FAN_INPUT 0 #define FAN_MIN 1 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, char *buf) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; struct w83793_data *data = w83793_update_device(dev); u16 val; if (nr == FAN_INPUT) val = data->fan[index] & 0x0fff; else val = data->fan_min[index] & 0x0fff; return sprintf(buf, "%lu\n", FAN_FROM_REG(val)); } static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int index = sensor_attr->index; struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; val = FAN_TO_REG(val); mutex_lock(&data->update_lock); data->fan_min[index] = val; w83793_write_value(client, W83793_REG_FAN_MIN(index), (val >> 8) & 0xff); w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff); mutex_unlock(&data->update_lock); return count; } static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, char *buf) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); struct w83793_data *data = w83793_update_device(dev); u16 val; int nr = sensor_attr->nr; int index = sensor_attr->index; if (nr == PWM_STOP_TIME) val = TIME_FROM_REG(data->pwm_stop_time[index]); else val = (data->pwm[index][nr] & 0x3f) << 2; return sprintf(buf, "%d\n", val); } static ssize_t store_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); if (nr == PWM_STOP_TIME) { val = TIME_TO_REG(val); data->pwm_stop_time[index] = val; w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index), val); } else { val = clamp_val(val, 0, 0xff) >> 2; data->pwm[index][nr] = w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0; data->pwm[index][nr] |= val; w83793_write_value(client, W83793_REG_PWM(index, nr), data->pwm[index][nr]); } mutex_unlock(&data->update_lock); return count; } static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; struct w83793_data *data = w83793_update_device(dev); long temp = TEMP_FROM_REG(data->temp[index][nr]); if (nr == TEMP_READ && index < 4) { /* Only TD1-TD4 have low bits */ int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250; temp += temp > 0 ? low : -low; } return sprintf(buf, "%ld\n", temp); } static ssize_t store_temp(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); long tmp; int err; err = kstrtol(buf, 10, &tmp); if (err) return err; mutex_lock(&data->update_lock); data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127); w83793_write_value(client, W83793_REG_TEMP[index][nr], data->temp[index][nr]); mutex_unlock(&data->update_lock); return 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[] = { 0, 0, 0, 6 }; static ssize_t show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf) { struct w83793_data *data = w83793_update_device(dev); struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int index = sensor_attr->index; u8 mask = (index < 4) ? 0x03 : 0x01; u8 shift = (index < 4) ? (2 * index) : (index - 4); u8 tmp; index = (index < 4) ? 0 : 1; tmp = (data->temp_mode[index] >> shift) & mask; /* for the internal sensor, found out if diode or thermistor */ if (tmp == 1) tmp = index == 0 ? 3 : 4; else tmp = TO_TEMP_MODE[tmp]; return sprintf(buf, "%d\n", tmp); } static ssize_t store_temp_mode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int index = sensor_attr->index; u8 mask = (index < 4) ? 0x03 : 0x01; u8 shift = (index < 4) ? (2 * index) : (index - 4); unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; /* transform the sysfs interface values into table above */ if ((val == 6) && (index < 4)) { val -= 3; } else if ((val == 3 && index < 4) || (val == 4 && index >= 4)) { /* transform diode or thermistor into internal enable */ val = !!val; } else { return -EINVAL; } index = (index < 4) ? 0 : 1; mutex_lock(&data->update_lock); data->temp_mode[index] = w83793_read_value(client, W83793_REG_TEMP_MODE[index]); data->temp_mode[index] &= ~(mask << shift); data->temp_mode[index] |= val << shift; w83793_write_value(client, W83793_REG_TEMP_MODE[index], data->temp_mode[index]); mutex_unlock(&data->update_lock); return count; } #define SETUP_PWM_DEFAULT 0 #define SETUP_PWM_UPTIME 1 /* Unit in 0.1s */ #define SETUP_PWM_DOWNTIME 2 /* Unit in 0.1s */ #define SETUP_TEMP_CRITICAL 3 static ssize_t show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; struct w83793_data *data = w83793_update_device(dev); u32 val = 0; if (nr == SETUP_PWM_DEFAULT) val = (data->pwm_default & 0x3f) << 2; else if (nr == SETUP_PWM_UPTIME) val = TIME_FROM_REG(data->pwm_uptime); else if (nr == SETUP_PWM_DOWNTIME) val = TIME_FROM_REG(data->pwm_downtime); else if (nr == SETUP_TEMP_CRITICAL) val = TEMP_FROM_REG(data->temp_critical & 0x7f); return sprintf(buf, "%d\n", val); } static ssize_t store_sf_setup(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); if (nr == SETUP_PWM_DEFAULT) { data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0; data->pwm_default |= clamp_val(val, 0, 0xff) >> 2; w83793_write_value(client, W83793_REG_PWM_DEFAULT, data->pwm_default); } else if (nr == SETUP_PWM_UPTIME) { data->pwm_uptime = TIME_TO_REG(val); data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0; w83793_write_value(client, W83793_REG_PWM_UPTIME, data->pwm_uptime); } else if (nr == SETUP_PWM_DOWNTIME) { data->pwm_downtime = TIME_TO_REG(val); data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0; w83793_write_value(client, W83793_REG_PWM_DOWNTIME, data->pwm_downtime); } else { /* SETUP_TEMP_CRITICAL */ data->temp_critical = w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80; data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f); w83793_write_value(client, W83793_REG_TEMP_CRITICAL, data->temp_critical); } mutex_unlock(&data->update_lock); return 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 0 #define TEMP_PWM_ENABLE 1 #define TEMP_CRUISE 2 #define TEMP_TOLERANCE 3 static ssize_t show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; struct w83793_data *data = w83793_update_device(dev); u32 val; if (nr == TEMP_FAN_MAP) { val = data->temp_fan_map[index]; } else if (nr == TEMP_PWM_ENABLE) { /* +2 to transform into 2 and 3 to conform with sysfs intf */ val = ((data->pwm_enable >> index) & 0x01) + 2; } else if (nr == TEMP_CRUISE) { val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f); } else { /* TEMP_TOLERANCE */ val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0); val = TEMP_FROM_REG(val & 0x0f); } return sprintf(buf, "%d\n", val); } static ssize_t store_sf_ctrl(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); if (nr == TEMP_FAN_MAP) { val = clamp_val(val, 0, 255); w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val); data->temp_fan_map[index] = val; } else if (nr == TEMP_PWM_ENABLE) { if (val == 2 || val == 3) { data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE); if (val - 2) data->pwm_enable |= 1 << index; else data->pwm_enable &= ~(1 << index); w83793_write_value(client, W83793_REG_PWM_ENABLE, data->pwm_enable); } else { mutex_unlock(&data->update_lock); return -EINVAL; } } else if (nr == TEMP_CRUISE) { data->temp_cruise[index] = w83793_read_value(client, W83793_REG_TEMP_CRUISE(index)); data->temp_cruise[index] &= 0x80; data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f); w83793_write_value(client, W83793_REG_TEMP_CRUISE(index), data->temp_cruise[index]); } else { /* TEMP_TOLERANCE */ int i = index >> 1; u8 shift = (index & 0x01) ? 4 : 0; data->tolerance[i] = w83793_read_value(client, W83793_REG_TEMP_TOL(i)); data->tolerance[i] &= ~(0x0f << shift); data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift; w83793_write_value(client, W83793_REG_TEMP_TOL(i), data->tolerance[i]); } mutex_unlock(&data->update_lock); return count; } static ssize_t show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; struct w83793_data *data = w83793_update_device(dev); return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2); } static ssize_t store_sf2_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; val = clamp_val(val, 0, 0xff) >> 2; mutex_lock(&data->update_lock); data->sf2_pwm[index][nr] = w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0; data->sf2_pwm[index][nr] |= val; w83793_write_value(client, W83793_REG_SF2_PWM(index, nr), data->sf2_pwm[index][nr]); mutex_unlock(&data->update_lock); return count; } static ssize_t show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; struct w83793_data *data = w83793_update_device(dev); return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f)); } static ssize_t store_sf2_temp(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; val = TEMP_TO_REG(val, 0, 0x7f); mutex_lock(&data->update_lock); data->sf2_temp[index][nr] = w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80; data->sf2_temp[index][nr] |= val; w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr), data->sf2_temp[index][nr]); mutex_unlock(&data->update_lock); return 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) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; struct w83793_data *data = w83793_update_device(dev); u16 val = data->in[index][nr]; if (index < 3) { val <<= 2; val += (data->in_low_bits[nr] >> (index * 2)) & 0x3; } /* voltage inputs 5VDD and 5VSB needs 150mV offset */ val = val * scale_in[index] + scale_in_add[index]; return sprintf(buf, "%d\n", val); } static ssize_t store_in(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int nr = sensor_attr->nr; int index = sensor_attr->index; struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; val = (val + scale_in[index] / 2) / scale_in[index]; mutex_lock(&data->update_lock); if (index > 2) { /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */ if (nr == 1 || nr == 2) val -= scale_in_add[index] / scale_in[index]; val = clamp_val(val, 0, 255); } else { val = clamp_val(val, 0, 0x3FF); data->in_low_bits[nr] = w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]); data->in_low_bits[nr] &= ~(0x03 << (2 * index)); data->in_low_bits[nr] |= (val & 0x03) << (2 * index); w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr], data->in_low_bits[nr]); val >>= 2; } data->in[index][nr] = val; w83793_write_value(client, W83793_REG_IN[index][nr], data->in[index][nr]); mutex_unlock(&data->update_lock); return count; } #define NOT_USED -1 #define SENSOR_ATTR_IN(index) \ SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL, \ IN_READ, index), \ SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in, \ store_in, IN_MAX, index), \ SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in, \ store_in, IN_LOW, index), \ SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep, \ NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)), \ SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO, \ show_alarm_beep, store_beep, BEEP_ENABLE, \ index + ((index > 2) ? 1 : 0)) #define SENSOR_ATTR_FAN(index) \ SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep, \ NULL, ALARM_STATUS, index + 17), \ SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO, \ show_alarm_beep, store_beep, BEEP_ENABLE, index + 17), \ SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan, \ NULL, FAN_INPUT, index - 1), \ SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO, \ show_fan, store_fan_min, FAN_MIN, index - 1) #define SENSOR_ATTR_PWM(index) \ SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm, \ store_pwm, PWM_DUTY, index - 1), \ SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO, \ show_pwm, store_pwm, PWM_NONSTOP, index - 1), \ SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO, \ show_pwm, store_pwm, PWM_START, index - 1), \ SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO, \ show_pwm, store_pwm, PWM_STOP_TIME, index - 1) #define SENSOR_ATTR_TEMP(index) \ SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR, \ show_temp_mode, store_temp_mode, NOT_USED, index - 1), \ SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp, \ NULL, TEMP_READ, index - 1), \ SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp, \ store_temp, TEMP_CRIT, index - 1), \ SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \ show_temp, store_temp, TEMP_CRIT_HYST, index - 1), \ SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \ store_temp, TEMP_WARN, index - 1), \ SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR, \ show_temp, store_temp, TEMP_WARN_HYST, index - 1), \ SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \ show_alarm_beep, NULL, ALARM_STATUS, index + 11), \ SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \ show_alarm_beep, store_beep, BEEP_ENABLE, index + 11), \ SENSOR_ATTR_2(temp##index##_auto_channels_pwm, \ S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl, \ TEMP_FAN_MAP, index - 1), \ SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO, \ show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE, \ index - 1), \ SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR, \ show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1), \ SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\ store_sf_ctrl, TEMP_TOLERANCE, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \ show_sf2_pwm, store_sf2_pwm, 0, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \ show_sf2_pwm, store_sf2_pwm, 1, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \ show_sf2_pwm, store_sf2_pwm, 2, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \ show_sf2_pwm, store_sf2_pwm, 3, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \ show_sf2_pwm, store_sf2_pwm, 4, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \ show_sf2_pwm, store_sf2_pwm, 5, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \ show_sf2_pwm, store_sf2_pwm, 6, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\ show_sf2_temp, store_sf2_temp, 0, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\ show_sf2_temp, store_sf2_temp, 1, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\ show_sf2_temp, store_sf2_temp, 2, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\ show_sf2_temp, store_sf2_temp, 3, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\ show_sf2_temp, store_sf2_temp, 4, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\ show_sf2_temp, store_sf2_temp, 5, index - 1), \ SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\ show_sf2_temp, store_sf2_temp, 6, index - 1) static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = { SENSOR_ATTR_IN(0), SENSOR_ATTR_IN(1), SENSOR_ATTR_IN(2), SENSOR_ATTR_IN(3), SENSOR_ATTR_IN(4), SENSOR_ATTR_IN(5), SENSOR_ATTR_IN(6), SENSOR_ATTR_IN(7), SENSOR_ATTR_IN(8), SENSOR_ATTR_IN(9), SENSOR_ATTR_FAN(1), SENSOR_ATTR_FAN(2), SENSOR_ATTR_FAN(3), SENSOR_ATTR_FAN(4), SENSOR_ATTR_FAN(5), SENSOR_ATTR_PWM(1), SENSOR_ATTR_PWM(2), SENSOR_ATTR_PWM(3), }; static struct sensor_device_attribute_2 w83793_temp[] = { SENSOR_ATTR_TEMP(1), SENSOR_ATTR_TEMP(2), SENSOR_ATTR_TEMP(3), SENSOR_ATTR_TEMP(4), SENSOR_ATTR_TEMP(5), SENSOR_ATTR_TEMP(6), }; /* Fan6-Fan12 */ static struct sensor_device_attribute_2 w83793_left_fan[] = { SENSOR_ATTR_FAN(6), SENSOR_ATTR_FAN(7), SENSOR_ATTR_FAN(8), SENSOR_ATTR_FAN(9), SENSOR_ATTR_FAN(10), SENSOR_ATTR_FAN(11), SENSOR_ATTR_FAN(12), }; /* Pwm4-Pwm8 */ static struct sensor_device_attribute_2 w83793_left_pwm[] = { SENSOR_ATTR_PWM(4), SENSOR_ATTR_PWM(5), SENSOR_ATTR_PWM(6), SENSOR_ATTR_PWM(7), SENSOR_ATTR_PWM(8), }; static struct sensor_device_attribute_2 w83793_vid[] = { SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0), SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1), }; static DEVICE_ATTR_RW(vrm); static struct sensor_device_attribute_2 sda_single_files[] = { SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep, store_chassis_clear, ALARM_STATUS, 30), SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable, store_beep_enable, NOT_USED, NOT_USED), SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup, store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED), SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup, store_sf_setup, SETUP_PWM_UPTIME, NOT_USED), SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup, store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED), SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup, store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED), }; static void w83793_init_client(struct i2c_client *client) { if (reset) w83793_write_value(client, W83793_REG_CONFIG, 0x80); /* Start monitoring */ w83793_write_value(client, W83793_REG_CONFIG, w83793_read_value(client, W83793_REG_CONFIG) | 0x01); } /* * Watchdog routines */ static int watchdog_set_timeout(struct w83793_data *data, int timeout) { unsigned int mtimeout; int ret; mtimeout = DIV_ROUND_UP(timeout, 60); if (mtimeout > 255) return -EINVAL; mutex_lock(&data->watchdog_lock); if (!data->client) { ret = -ENODEV; goto leave; } data->watchdog_timeout = mtimeout; /* Set Timeout value (in Minutes) */ w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT, data->watchdog_timeout); ret = mtimeout * 60; leave: mutex_unlock(&data->watchdog_lock); return ret; } static int watchdog_get_timeout(struct w83793_data *data) { int timeout; mutex_lock(&data->watchdog_lock); timeout = data->watchdog_timeout * 60; mutex_unlock(&data->watchdog_lock); return timeout; } static int watchdog_trigger(struct w83793_data *data) { int ret = 0; mutex_lock(&data->watchdog_lock); if (!data->client) { ret = -ENODEV; goto leave; } /* Set Timeout value (in Minutes) */ w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT, data->watchdog_timeout); leave: mutex_unlock(&data->watchdog_lock); return ret; } static int watchdog_enable(struct w83793_data *data) { int ret = 0; mutex_lock(&data->watchdog_lock); if (!data->client) { ret = -ENODEV; goto leave; } /* Set initial timeout */ w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT, data->watchdog_timeout); /* Enable Soft Watchdog */ w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55); leave: mutex_unlock(&data->watchdog_lock); return ret; } static int watchdog_disable(struct w83793_data *data) { int ret = 0; mutex_lock(&data->watchdog_lock); if (!data->client) { ret = -ENODEV; goto leave; } /* Disable Soft Watchdog */ w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA); leave: mutex_unlock(&data->watchdog_lock); return ret; } static int watchdog_open(struct inode *inode, struct file *filp) { struct w83793_data *pos, *data = NULL; int watchdog_is_open; /* * We get called from drivers/char/misc.c with misc_mtx hold, and we * call misc_register() from w83793_probe() with watchdog_data_mutex * hold, as misc_register() takes the misc_mtx lock, this is a possible * deadlock, so we use mutex_trylock here. */ if (!mutex_trylock(&watchdog_data_mutex)) return -ERESTARTSYS; list_for_each_entry(pos, &watchdog_data_list, list) { if (pos->watchdog_miscdev.minor == iminor(inode)) { data = pos; break; } } /* Check, if device is already open */ watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open); /* * Increase data reference counter (if not already done). * Note we can never not have found data, so we don't check for this */ if (!watchdog_is_open) kref_get(&data->kref); mutex_unlock(&watchdog_data_mutex); /* Check, if device is already open and possibly issue error */ if (watchdog_is_open) return -EBUSY; /* Enable Soft Watchdog */ watchdog_enable(data); /* Store pointer to data into filp's private data */ filp->private_data = data; return stream_open(inode, filp); } static int watchdog_close(struct inode *inode, struct file *filp) { struct w83793_data *data = filp->private_data; if (data->watchdog_expect_close) { watchdog_disable(data); data->watchdog_expect_close = 0; } else { watchdog_trigger(data); dev_crit(&data->client->dev, "unexpected close, not stopping watchdog!\n"); } clear_bit(0, &data->watchdog_is_open); /* Decrease data reference counter */ mutex_lock(&watchdog_data_mutex); kref_put(&data->kref, w83793_release_resources); mutex_unlock(&watchdog_data_mutex); return 0; } static ssize_t watchdog_write(struct file *filp, const char __user *buf, size_t count, loff_t *offset) { ssize_t ret; struct w83793_data *data = filp->private_data; if (count) { if (!nowayout) { size_t i; /* Clear it in case it was set with a previous write */ data->watchdog_expect_close = 0; for (i = 0; i != count; i++) { char c; if (get_user(c, buf + i)) return -EFAULT; if (c == 'V') data->watchdog_expect_close = 1; } } ret = watchdog_trigger(data); if (ret < 0) return ret; } return count; } static long watchdog_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct watchdog_info ident = { .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_CARDRESET, .identity = "w83793 watchdog" }; int val, ret = 0; struct w83793_data *data = filp->private_data; switch (cmd) { case WDIOC_GETSUPPORT: if (!nowayout) ident.options |= WDIOF_MAGICCLOSE; if (copy_to_user((void __user *)arg, &ident, sizeof(ident))) ret = -EFAULT; break; case WDIOC_GETSTATUS: val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0; ret = put_user(val, (int __user *)arg); break; case WDIOC_GETBOOTSTATUS: ret = put_user(0, (int __user *)arg); break; case WDIOC_KEEPALIVE: ret = watchdog_trigger(data); break; case WDIOC_GETTIMEOUT: val = watchdog_get_timeout(data); ret = put_user(val, (int __user *)arg); break; case WDIOC_SETTIMEOUT: if (get_user(val, (int __user *)arg)) { ret = -EFAULT; break; } ret = watchdog_set_timeout(data, val); if (ret > 0) ret = put_user(ret, (int __user *)arg); break; case WDIOC_SETOPTIONS: if (get_user(val, (int __user *)arg)) { ret = -EFAULT; break; } if (val & WDIOS_DISABLECARD) ret = watchdog_disable(data); else if (val & WDIOS_ENABLECARD) ret = watchdog_enable(data); else ret = -EINVAL; break; default: ret = -ENOTTY; } return ret; } static const struct file_operations watchdog_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .open = watchdog_open, .release = watchdog_close, .write = watchdog_write, .unlocked_ioctl = watchdog_ioctl, }; /* * Notifier for system down */ static int watchdog_notify_sys(struct notifier_block *this, unsigned long code, void *unused) { struct w83793_data *data = NULL; if (code == SYS_DOWN || code == SYS_HALT) { /* Disable each registered watchdog */ mutex_lock(&watchdog_data_mutex); list_for_each_entry(data, &watchdog_data_list, list) { if (data->watchdog_miscdev.minor) watchdog_disable(data); } mutex_unlock(&watchdog_data_mutex); } return NOTIFY_DONE; } /* * The WDT needs to learn about soft shutdowns in order to * turn the timebomb registers off. */ static struct notifier_block watchdog_notifier = { .notifier_call = watchdog_notify_sys, }; /* * Init / remove routines */ static int w83793_remove(struct i2c_client *client) { struct w83793_data *data = i2c_get_clientdata(client); struct device *dev = &client->dev; int i, tmp; /* Unregister the watchdog (if registered) */ if (data->watchdog_miscdev.minor) { misc_deregister(&data->watchdog_miscdev); if (data->watchdog_is_open) { dev_warn(&client->dev, "i2c client detached with watchdog open! " "Stopping watchdog.\n"); watchdog_disable(data); } mutex_lock(&watchdog_data_mutex); list_del(&data->list); mutex_unlock(&watchdog_data_mutex); /* Tell the watchdog code the client is gone */ mutex_lock(&data->watchdog_lock); data->client = NULL; mutex_unlock(&data->watchdog_lock); } /* Reset Configuration Register to Disable Watch Dog Registers */ tmp = w83793_read_value(client, W83793_REG_CONFIG); w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04); unregister_reboot_notifier(&watchdog_notifier); hwmon_device_unregister(data->hwmon_dev); for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr); for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) device_remove_file(dev, &sda_single_files[i].dev_attr); for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) device_remove_file(dev, &w83793_vid[i].dev_attr); device_remove_file(dev, &dev_attr_vrm); for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++) device_remove_file(dev, &w83793_left_fan[i].dev_attr); for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++) device_remove_file(dev, &w83793_left_pwm[i].dev_attr); for (i = 0; i < ARRAY_SIZE(w83793_temp); i++) device_remove_file(dev, &w83793_temp[i].dev_attr); i2c_unregister_device(data->lm75[0]); i2c_unregister_device(data->lm75[1]); /* Decrease data reference counter */ mutex_lock(&watchdog_data_mutex); kref_put(&data->kref, w83793_release_resources); mutex_unlock(&watchdog_data_mutex); return 0; } static int w83793_detect_subclients(struct i2c_client *client) { int i, id, err; int address = client->addr; u8 tmp; struct i2c_adapter *adapter = client->adapter; struct w83793_data *data = i2c_get_clientdata(client); id = i2c_adapter_id(adapter); if (force_subclients[0] == id && force_subclients[1] == address) { for (i = 2; i <= 3; i++) { if (force_subclients[i] < 0x48 || force_subclients[i] > 0x4f) { dev_err(&client->dev, "invalid subclient " "address %d; must be 0x48-0x4f\n", force_subclients[i]); err = -EINVAL; goto ERROR_SC_0; } } w83793_write_value(client, W83793_REG_I2C_SUBADDR, (force_subclients[2] & 0x07) | ((force_subclients[3] & 0x07) << 4)); } tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR); if (!(tmp & 0x08)) data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7)); if (!(tmp & 0x80)) { if ((data->lm75[0] != NULL) && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) { dev_err(&client->dev, "duplicate addresses 0x%x, " "use force_subclients\n", data->lm75[0]->addr); err = -ENODEV; goto ERROR_SC_1; } data->lm75[1] = i2c_new_dummy(adapter, 0x48 + ((tmp >> 4) & 0x7)); } return 0; /* Undo inits in case of errors */ ERROR_SC_1: i2c_unregister_device(data->lm75[0]); ERROR_SC_0: return err; } /* Return 0 if detection is successful, -ENODEV otherwise */ static int w83793_detect(struct i2c_client *client, struct i2c_board_info *info) { u8 tmp, bank, chip_id; struct i2c_adapter *adapter = client->adapter; unsigned short address = client->addr; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL); tmp = bank & 0x80 ? 0x5c : 0xa3; /* Check Winbond vendor ID */ if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) { pr_debug("w83793: Detection failed at check vendor id\n"); return -ENODEV; } /* * If Winbond chip, address of chip and W83793_REG_I2C_ADDR * should match */ if ((bank & 0x07) == 0 && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) != (address << 1)) { pr_debug("w83793: Detection failed at check i2c addr\n"); return -ENODEV; } /* Determine the chip type now */ chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID); if (chip_id != 0x7b) return -ENODEV; strlcpy(info->type, "w83793", I2C_NAME_SIZE); return 0; } static int w83793_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; static const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 }; struct w83793_data *data; int i, tmp, val, err; int files_fan = ARRAY_SIZE(w83793_left_fan) / 7; int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5; int files_temp = ARRAY_SIZE(w83793_temp) / 6; data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL); if (!data) { err = -ENOMEM; goto exit; } i2c_set_clientdata(client, data); data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL); mutex_init(&data->update_lock); mutex_init(&data->watchdog_lock); INIT_LIST_HEAD(&data->list); kref_init(&data->kref); /* * Store client pointer in our data struct for watchdog usage * (where the client is found through a data ptr instead of the * otherway around) */ data->client = client; err = w83793_detect_subclients(client); if (err) goto free_mem; /* Initialize the chip */ w83793_init_client(client); /* * Only fan 1-5 has their own input pins, * Pwm 1-3 has their own pins */ data->has_fan = 0x1f; data->has_pwm = 0x07; tmp = w83793_read_value(client, W83793_REG_MFC); val = w83793_read_value(client, W83793_REG_FANIN_CTRL); /* check the function of pins 49-56 */ if (tmp & 0x80) { data->has_vid |= 0x2; /* has VIDB */ } else { data->has_pwm |= 0x18; /* pwm 4,5 */ if (val & 0x01) { /* fan 6 */ data->has_fan |= 0x20; data->has_pwm |= 0x20; } if (val & 0x02) { /* fan 7 */ data->has_fan |= 0x40; data->has_pwm |= 0x40; } if (!(tmp & 0x40) && (val & 0x04)) { /* fan 8 */ data->has_fan |= 0x80; data->has_pwm |= 0x80; } } /* check the function of pins 37-40 */ if (!(tmp & 0x29)) data->has_vid |= 0x1; /* has VIDA */ if (0x08 == (tmp & 0x0c)) { if (val & 0x08) /* fan 9 */ data->has_fan |= 0x100; if (val & 0x10) /* fan 10 */ data->has_fan |= 0x200; } if (0x20 == (tmp & 0x30)) { if (val & 0x20) /* fan 11 */ data->has_fan |= 0x400; if (val & 0x40) /* fan 12 */ data->has_fan |= 0x800; } if ((tmp & 0x01) && (val & 0x04)) { /* fan 8, second location */ data->has_fan |= 0x80; data->has_pwm |= 0x80; } tmp = w83793_read_value(client, W83793_REG_FANIN_SEL); if ((tmp & 0x01) && (val & 0x08)) { /* fan 9, second location */ data->has_fan |= 0x100; } if ((tmp & 0x02) && (val & 0x10)) { /* fan 10, second location */ data->has_fan |= 0x200; } if ((tmp & 0x04) && (val & 0x20)) { /* fan 11, second location */ data->has_fan |= 0x400; } if ((tmp & 0x08) && (val & 0x40)) { /* fan 12, second location */ data->has_fan |= 0x800; } /* check the temp1-6 mode, ignore former AMDSI selected inputs */ tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]); if (tmp & 0x01) data->has_temp |= 0x01; if (tmp & 0x04) data->has_temp |= 0x02; if (tmp & 0x10) data->has_temp |= 0x04; if (tmp & 0x40) data->has_temp |= 0x08; tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]); if (tmp & 0x01) data->has_temp |= 0x10; if (tmp & 0x02) data->has_temp |= 0x20; /* Register sysfs hooks */ for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) { err = device_create_file(dev, &w83793_sensor_attr_2[i].dev_attr); if (err) goto exit_remove; } for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) { if (!(data->has_vid & (1 << i))) continue; err = device_create_file(dev, &w83793_vid[i].dev_attr); if (err) goto exit_remove; } if (data->has_vid) { data->vrm = vid_which_vrm(); err = device_create_file(dev, &dev_attr_vrm); if (err) goto exit_remove; } for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) { err = device_create_file(dev, &sda_single_files[i].dev_attr); if (err) goto exit_remove; } for (i = 0; i < 6; i++) { int j; if (!(data->has_temp & (1 << i))) continue; for (j = 0; j < files_temp; j++) { err = device_create_file(dev, &w83793_temp[(i) * files_temp + j].dev_attr); if (err) goto exit_remove; } } for (i = 5; i < 12; i++) { int j; if (!(data->has_fan & (1 << i))) continue; for (j = 0; j < files_fan; j++) { err = device_create_file(dev, &w83793_left_fan[(i - 5) * files_fan + j].dev_attr); if (err) goto exit_remove; } } for (i = 3; i < 8; i++) { int j; if (!(data->has_pwm & (1 << i))) continue; for (j = 0; j < files_pwm; j++) { err = device_create_file(dev, &w83793_left_pwm[(i - 3) * files_pwm + j].dev_attr); if (err) goto exit_remove; } } data->hwmon_dev = hwmon_device_register(dev); if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); goto exit_remove; } /* Watchdog initialization */ /* Register boot notifier */ err = register_reboot_notifier(&watchdog_notifier); if (err != 0) { dev_err(&client->dev, "cannot register reboot notifier (err=%d)\n", err); goto exit_devunreg; } /* * Enable Watchdog registers. * Set Configuration Register to Enable Watch Dog Registers * (Bit 2) = XXXX, X1XX. */ tmp = w83793_read_value(client, W83793_REG_CONFIG); w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04); /* Set the default watchdog timeout */ data->watchdog_timeout = timeout; /* Check, if last reboot was caused by watchdog */ data->watchdog_caused_reboot = w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01; /* Disable Soft Watchdog during initialiation */ watchdog_disable(data); /* * We take the data_mutex lock early so that watchdog_open() cannot * run when misc_register() has completed, but we've not yet added * our data to the watchdog_data_list (and set the default timeout) */ mutex_lock(&watchdog_data_mutex); for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) { /* Register our watchdog part */ snprintf(data->watchdog_name, sizeof(data->watchdog_name), "watchdog%c", (i == 0) ? '\0' : ('0' + i)); data->watchdog_miscdev.name = data->watchdog_name; data->watchdog_miscdev.fops = &watchdog_fops; data->watchdog_miscdev.minor = watchdog_minors[i]; err = misc_register(&data->watchdog_miscdev); if (err == -EBUSY) continue; if (err) { data->watchdog_miscdev.minor = 0; dev_err(&client->dev, "Registering watchdog chardev: %d\n", err); break; } list_add(&data->list, &watchdog_data_list); dev_info(&client->dev, "Registered watchdog chardev major 10, minor: %d\n", watchdog_minors[i]); break; } if (i == ARRAY_SIZE(watchdog_minors)) { data->watchdog_miscdev.minor = 0; dev_warn(&client->dev, "Couldn't register watchdog chardev (due to no free minor)\n"); } mutex_unlock(&watchdog_data_mutex); return 0; /* Unregister hwmon device */ exit_devunreg: hwmon_device_unregister(data->hwmon_dev); /* Unregister sysfs hooks */ exit_remove: for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr); for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) device_remove_file(dev, &sda_single_files[i].dev_attr); for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) device_remove_file(dev, &w83793_vid[i].dev_attr); for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++) device_remove_file(dev, &w83793_left_fan[i].dev_attr); for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++) device_remove_file(dev, &w83793_left_pwm[i].dev_attr); for (i = 0; i < ARRAY_SIZE(w83793_temp); i++) device_remove_file(dev, &w83793_temp[i].dev_attr); i2c_unregister_device(data->lm75[0]); i2c_unregister_device(data->lm75[1]); free_mem: kfree(data); exit: return err; } static void w83793_update_nonvolatile(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); int i, j; /* * They are somewhat "stable" registers, and to update them every time * takes so much time, it's just not worthy. Update them in a long * interval to avoid exception. */ if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300) || !data->valid)) return; /* update voltage limits */ for (i = 1; i < 3; i++) { for (j = 0; j < ARRAY_SIZE(data->in); j++) { data->in[j][i] = w83793_read_value(client, W83793_REG_IN[j][i]); } data->in_low_bits[i] = w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]); } for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) { /* Update the Fan measured value and limits */ if (!(data->has_fan & (1 << i))) continue; data->fan_min[i] = w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8; data->fan_min[i] |= w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1); } for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) { if (!(data->has_temp & (1 << i))) continue; data->temp_fan_map[i] = w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i)); for (j = 1; j < 5; j++) { data->temp[i][j] = w83793_read_value(client, W83793_REG_TEMP[i][j]); } data->temp_cruise[i] = w83793_read_value(client, W83793_REG_TEMP_CRUISE(i)); for (j = 0; j < 7; j++) { data->sf2_pwm[i][j] = w83793_read_value(client, W83793_REG_SF2_PWM(i, j)); data->sf2_temp[i][j] = w83793_read_value(client, W83793_REG_SF2_TEMP(i, j)); } } for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++) data->temp_mode[i] = w83793_read_value(client, W83793_REG_TEMP_MODE[i]); for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) { data->tolerance[i] = w83793_read_value(client, W83793_REG_TEMP_TOL(i)); } for (i = 0; i < ARRAY_SIZE(data->pwm); i++) { if (!(data->has_pwm & (1 << i))) continue; data->pwm[i][PWM_NONSTOP] = w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP)); data->pwm[i][PWM_START] = w83793_read_value(client, W83793_REG_PWM(i, PWM_START)); data->pwm_stop_time[i] = w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i)); } data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT); data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE); data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME); data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME); data->temp_critical = w83793_read_value(client, W83793_REG_TEMP_CRITICAL); data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP); for (i = 0; i < ARRAY_SIZE(data->beeps); i++) data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i)); data->last_nonvolatile = jiffies; } static struct w83793_data *w83793_update_device(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct w83793_data *data = i2c_get_clientdata(client); int i; mutex_lock(&data->update_lock); if (!(time_after(jiffies, data->last_updated + HZ * 2) || !data->valid)) goto END; /* Update the voltages measured value and limits */ for (i = 0; i < ARRAY_SIZE(data->in); i++) data->in[i][IN_READ] = w83793_read_value(client, W83793_REG_IN[i][IN_READ]); data->in_low_bits[IN_READ] = w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]); for (i = 0; i < ARRAY_SIZE(data->fan); i++) { if (!(data->has_fan & (1 << i))) continue; data->fan[i] = w83793_read_value(client, W83793_REG_FAN(i)) << 8; data->fan[i] |= w83793_read_value(client, W83793_REG_FAN(i) + 1); } for (i = 0; i < ARRAY_SIZE(data->temp); i++) { if (!(data->has_temp & (1 << i))) continue; data->temp[i][TEMP_READ] = w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]); } data->temp_low_bits = w83793_read_value(client, W83793_REG_TEMP_LOW_BITS); for (i = 0; i < ARRAY_SIZE(data->pwm); i++) { if (data->has_pwm & (1 << i)) data->pwm[i][PWM_DUTY] = w83793_read_value(client, W83793_REG_PWM(i, PWM_DUTY)); } for (i = 0; i < ARRAY_SIZE(data->alarms); i++) data->alarms[i] = w83793_read_value(client, W83793_REG_ALARM(i)); if (data->has_vid & 0x01) data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA); if (data->has_vid & 0x02) data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB); w83793_update_nonvolatile(dev); data->last_updated = jiffies; data->valid = 1; END: mutex_unlock(&data->update_lock); return data; } /* * 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) { struct w83793_data *data = i2c_get_clientdata(client); u8 res = 0xff; u8 new_bank = reg >> 8; new_bank |= data->bank & 0xfc; if (data->bank != new_bank) { if (i2c_smbus_write_byte_data (client, W83793_REG_BANKSEL, new_bank) >= 0) data->bank = new_bank; else { dev_err(&client->dev, "set bank to %d failed, fall back " "to bank %d, read reg 0x%x error\n", new_bank, data->bank, reg); res = 0x0; /* read 0x0 from the chip */ goto END; } } res = i2c_smbus_read_byte_data(client, reg & 0xff); END: return res; } /* Must be called with data->update_lock held, except during initialization */ static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value) { struct w83793_data *data = i2c_get_clientdata(client); int res; u8 new_bank = reg >> 8; new_bank |= data->bank & 0xfc; if (data->bank != new_bank) { res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL, new_bank); if (res < 0) { dev_err(&client->dev, "set bank to %d failed, fall back " "to bank %d, write reg 0x%x error\n", new_bank, data->bank, reg); goto END; } data->bank = new_bank; } res = i2c_smbus_write_byte_data(client, reg & 0xff, value); END: return res; } module_i2c_driver(w83793_driver); MODULE_AUTHOR("Yuan Mu, Sven Anders"); MODULE_DESCRIPTION("w83793 driver"); MODULE_LICENSE("GPL");
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