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w83793.c
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// 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 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 device *hwmon_dev;
struct mutex update_lock;
bool valid; /* true 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);
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[] = {
{ "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 = false; /* 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);