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it87.c
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/*
it87.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring.
Supports: IT8705F Super I/O chip w/LPC interface
IT8712F Super I/O chip w/LPC interface & SMBus
IT8716F Super I/O chip w/LPC interface
Sis950 A clone of the IT8705F
Copyright (C) 2001 Chris Gauthron <chrisg@0-in.com>
Largely inspired by lm78.c of the same package
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
djg@pdp8.net David Gesswein 7/18/01
Modified to fix bug with not all alarms enabled.
Added ability to read battery voltage and select temperature sensor
type at module load time.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/i2c-isa.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <asm/io.h>
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
static unsigned short isa_address;
/* Insmod parameters */
I2C_CLIENT_INSMOD_3(it87, it8712, it8716);
#define REG 0x2e /* The register to read/write */
#define DEV 0x07 /* Register: Logical device select */
#define VAL 0x2f /* The value to read/write */
#define PME 0x04 /* The device with the fan registers in it */
#define DEVID 0x20 /* Register: Device ID */
#define DEVREV 0x22 /* Register: Device Revision */
static inline int
superio_inb(int reg)
{
outb(reg, REG);
return inb(VAL);
}
static int superio_inw(int reg)
{
int val;
outb(reg++, REG);
val = inb(VAL) << 8;
outb(reg, REG);
val |= inb(VAL);
return val;
}
static inline void
superio_select(void)
{
outb(DEV, REG);
outb(PME, VAL);
}
static inline void
superio_enter(void)
{
outb(0x87, REG);
outb(0x01, REG);
outb(0x55, REG);
outb(0x55, REG);
}
static inline void
superio_exit(void)
{
outb(0x02, REG);
outb(0x02, VAL);
}
#define IT8712F_DEVID 0x8712
#define IT8705F_DEVID 0x8705
#define IT8716F_DEVID 0x8716
#define IT87_ACT_REG 0x30
#define IT87_BASE_REG 0x60
/* Update battery voltage after every reading if true */
static int update_vbat;
/* Not all BIOSes properly configure the PWM registers */
static int fix_pwm_polarity;
/* Chip Type */
static u16 chip_type;
/* Many IT87 constants specified below */
/* Length of ISA address segment */
#define IT87_EXTENT 8
/* Where are the ISA address/data registers relative to the base address */
#define IT87_ADDR_REG_OFFSET 5
#define IT87_DATA_REG_OFFSET 6
/*----- The IT87 registers -----*/
#define IT87_REG_CONFIG 0x00
#define IT87_REG_ALARM1 0x01
#define IT87_REG_ALARM2 0x02
#define IT87_REG_ALARM3 0x03
#define IT87_REG_VID 0x0a
/* Warning: register 0x0b is used for something completely different in
new chips/revisions. I suspect only 16-bit tachometer mode will work
for these. */
#define IT87_REG_FAN_DIV 0x0b
#define IT87_REG_FAN_16BIT 0x0c
/* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
#define IT87_REG_FAN(nr) (0x0d + (nr))
#define IT87_REG_FAN_MIN(nr) (0x10 + (nr))
#define IT87_REG_FANX(nr) (0x18 + (nr))
#define IT87_REG_FANX_MIN(nr) (0x1b + (nr))
#define IT87_REG_FAN_MAIN_CTRL 0x13
#define IT87_REG_FAN_CTL 0x14
#define IT87_REG_PWM(nr) (0x15 + (nr))
#define IT87_REG_VIN(nr) (0x20 + (nr))
#define IT87_REG_TEMP(nr) (0x29 + (nr))
#define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
#define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
#define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
#define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
#define IT87_REG_I2C_ADDR 0x48
#define IT87_REG_VIN_ENABLE 0x50
#define IT87_REG_TEMP_ENABLE 0x51
#define IT87_REG_CHIPID 0x58
#define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255))
#define IN_FROM_REG(val) ((val) * 16)
static inline u8 FAN_TO_REG(long rpm, int div)
{
if (rpm == 0)
return 255;
rpm = SENSORS_LIMIT(rpm, 1, 1000000);
return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
254);
}
static inline u16 FAN16_TO_REG(long rpm)
{
if (rpm == 0)
return 0xffff;
return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
}
#define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
/* The divider is fixed to 2 in 16-bit mode */
#define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2))
#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
((val)+500)/1000),-128,127))
#define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
#define PWM_TO_REG(val) ((val) >> 1)
#define PWM_FROM_REG(val) (((val)&0x7f) << 1)
static int DIV_TO_REG(int val)
{
int answer = 0;
while (answer < 7 && (val >>= 1))
answer++;
return answer;
}
#define DIV_FROM_REG(val) (1 << (val))
/* For each registered IT87, we need to keep some data in memory. That
data is pointed to by it87_list[NR]->data. The structure itself is
dynamically allocated, at the same time when a new it87 client is
allocated. */
struct it87_data {
struct i2c_client client;
struct class_device *class_dev;
struct mutex lock;
enum chips type;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 in[9]; /* Register value */
u8 in_max[9]; /* Register value */
u8 in_min[9]; /* Register value */
u8 has_fan; /* Bitfield, fans enabled */
u16 fan[3]; /* Register values, possibly combined */
u16 fan_min[3]; /* Register values, possibly combined */
u8 temp[3]; /* Register value */
u8 temp_high[3]; /* Register value */
u8 temp_low[3]; /* Register value */
u8 sensor; /* Register value */
u8 fan_div[3]; /* Register encoding, shifted right */
u8 vid; /* Register encoding, combined */
u8 vrm;
u32 alarms; /* Register encoding, combined */
u8 fan_main_ctrl; /* Register value */
u8 manual_pwm_ctl[3]; /* manual PWM value set by user */
};
static int it87_attach_adapter(struct i2c_adapter *adapter);
static int it87_isa_attach_adapter(struct i2c_adapter *adapter);
static int it87_detect(struct i2c_adapter *adapter, int address, int kind);
static int it87_detach_client(struct i2c_client *client);
static int it87_read_value(struct i2c_client *client, u8 reg);
static int it87_write_value(struct i2c_client *client, u8 reg, u8 value);
static struct it87_data *it87_update_device(struct device *dev);
static int it87_check_pwm(struct i2c_client *client);
static void it87_init_client(struct i2c_client *client, struct it87_data *data);
static struct i2c_driver it87_driver = {
.driver = {
.name = "it87",
},
.id = I2C_DRIVERID_IT87,
.attach_adapter = it87_attach_adapter,
.detach_client = it87_detach_client,
};
static struct i2c_driver it87_isa_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "it87-isa",
},
.attach_adapter = it87_isa_attach_adapter,
.detach_client = it87_detach_client,
};
static ssize_t show_in(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
}
static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
}
static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
}
static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_min[nr] = IN_TO_REG(val);
it87_write_value(client, IT87_REG_VIN_MIN(nr),
data->in_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_max[nr] = IN_TO_REG(val);
it87_write_value(client, IT87_REG_VIN_MAX(nr),
data->in_max[nr]);
mutex_unlock(&data->update_lock);
return count;
}
#define show_in_offset(offset) \
static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
show_in, NULL, offset);
#define limit_in_offset(offset) \
static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
show_in_min, set_in_min, offset); \
static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
show_in_max, set_in_max, offset);
show_in_offset(0);
limit_in_offset(0);
show_in_offset(1);
limit_in_offset(1);
show_in_offset(2);
limit_in_offset(2);
show_in_offset(3);
limit_in_offset(3);
show_in_offset(4);
limit_in_offset(4);
show_in_offset(5);
limit_in_offset(5);
show_in_offset(6);
limit_in_offset(6);
show_in_offset(7);
limit_in_offset(7);
show_in_offset(8);
/* 3 temperatures */
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
}
static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
}
static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
}
static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_high[nr] = TEMP_TO_REG(val);
it87_write_value(client, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_low[nr] = TEMP_TO_REG(val);
it87_write_value(client, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
mutex_unlock(&data->update_lock);
return count;
}
#define show_temp_offset(offset) \
static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
show_temp, NULL, offset - 1); \
static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
show_temp_max, set_temp_max, offset - 1); \
static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
show_temp_min, set_temp_min, offset - 1);
show_temp_offset(1);
show_temp_offset(2);
show_temp_offset(3);
static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
u8 reg = data->sensor; /* In case the value is updated while we use it */
if (reg & (1 << nr))
return sprintf(buf, "3\n"); /* thermal diode */
if (reg & (8 << nr))
return sprintf(buf, "2\n"); /* thermistor */
return sprintf(buf, "0\n"); /* disabled */
}
static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->sensor &= ~(1 << nr);
data->sensor &= ~(8 << nr);
/* 3 = thermal diode; 2 = thermistor; 0 = disabled */
if (val == 3)
data->sensor |= 1 << nr;
else if (val == 2)
data->sensor |= 8 << nr;
else if (val != 0) {
mutex_unlock(&data->update_lock);
return -EINVAL;
}
it87_write_value(client, IT87_REG_TEMP_ENABLE, data->sensor);
mutex_unlock(&data->update_lock);
return count;
}
#define show_sensor_offset(offset) \
static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
show_sensor, set_sensor, offset - 1);
show_sensor_offset(1);
show_sensor_offset(2);
show_sensor_offset(3);
/* 3 Fans */
static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr],
DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf,"%d\n",
FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
}
static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0);
}
static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]);
}
static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
u8 reg = it87_read_value(client, IT87_REG_FAN_DIV);
mutex_lock(&data->update_lock);
switch (nr) {
case 0: data->fan_div[nr] = reg & 0x07; break;
case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break;
case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break;
}
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
it87_write_value(client, IT87_REG_FAN_MIN(nr), data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
int i, min[3];
u8 old;
mutex_lock(&data->update_lock);
old = it87_read_value(client, IT87_REG_FAN_DIV);
for (i = 0; i < 3; i++)
min[i] = FAN_FROM_REG(data->fan_min[i], DIV_FROM_REG(data->fan_div[i]));
switch (nr) {
case 0:
case 1:
data->fan_div[nr] = DIV_TO_REG(val);
break;
case 2:
if (val < 8)
data->fan_div[nr] = 1;
else
data->fan_div[nr] = 3;
}
val = old & 0x80;
val |= (data->fan_div[0] & 0x07);
val |= (data->fan_div[1] & 0x07) << 3;
if (data->fan_div[2] == 3)
val |= 0x1 << 6;
it87_write_value(client, IT87_REG_FAN_DIV, val);
for (i = 0; i < 3; i++) {
data->fan_min[i]=FAN_TO_REG(min[i], DIV_FROM_REG(data->fan_div[i]));
it87_write_value(client, IT87_REG_FAN_MIN(i), data->fan_min[i]);
}
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_pwm_enable(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
if (val == 0) {
int tmp;
/* make sure the fan is on when in on/off mode */
tmp = it87_read_value(client, IT87_REG_FAN_CTL);
it87_write_value(client, IT87_REG_FAN_CTL, tmp | (1 << nr));
/* set on/off mode */
data->fan_main_ctrl &= ~(1 << nr);
it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
} else if (val == 1) {
/* set SmartGuardian mode */
data->fan_main_ctrl |= (1 << nr);
it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
/* set saved pwm value, clear FAN_CTLX PWM mode bit */
it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
} else {
mutex_unlock(&data->update_lock);
return -EINVAL;
}
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
if (val < 0 || val > 255)
return -EINVAL;
mutex_lock(&data->update_lock);
data->manual_pwm_ctl[nr] = val;
if (data->fan_main_ctrl & (1 << nr))
it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
mutex_unlock(&data->update_lock);
return count;
}
#define show_fan_offset(offset) \
static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
show_fan, NULL, offset - 1); \
static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
show_fan_min, set_fan_min, offset - 1); \
static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
show_fan_div, set_fan_div, offset - 1);
show_fan_offset(1);
show_fan_offset(2);
show_fan_offset(3);
#define show_pwm_offset(offset) \
static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
show_pwm_enable, set_pwm_enable, offset - 1); \
static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
show_pwm, set_pwm, offset - 1);
show_pwm_offset(1);
show_pwm_offset(2);
show_pwm_offset(3);
/* A different set of callbacks for 16-bit fans */
static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
}
static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
}
static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->fan_min[nr] = FAN16_TO_REG(val);
it87_write_value(client, IT87_REG_FAN_MIN(nr),
data->fan_min[nr] & 0xff);
it87_write_value(client, IT87_REG_FANX_MIN(nr),
data->fan_min[nr] >> 8);
mutex_unlock(&data->update_lock);
return count;
}
/* We want to use the same sysfs file names as 8-bit fans, but we need
different variable names, so we have to use SENSOR_ATTR instead of
SENSOR_DEVICE_ATTR. */
#define show_fan16_offset(offset) \
static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
= SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
show_fan16, NULL, offset - 1); \
static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
= SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
show_fan16_min, set_fan16_min, offset - 1)
show_fan16_offset(1);
show_fan16_offset(2);
show_fan16_offset(3);
/* Alarms */
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
{
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%u\n", data->alarms);
}
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static ssize_t
show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%u\n", data->vrm);
}
static ssize_t
store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
u32 val;
val = simple_strtoul(buf, NULL, 10);
data->vrm = val;
return count;
}
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
#define device_create_file_vrm(client) \
device_create_file(&client->dev, &dev_attr_vrm)
static ssize_t
show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
#define device_create_file_vid(client) \
device_create_file(&client->dev, &dev_attr_cpu0_vid)
/* This function is called when:
* it87_driver is inserted (when this module is loaded), for each
available adapter
* when a new adapter is inserted (and it87_driver is still present) */
static int it87_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, it87_detect);
}
static int it87_isa_attach_adapter(struct i2c_adapter *adapter)
{
return it87_detect(adapter, isa_address, -1);
}
/* SuperIO detection - will change isa_address if a chip is found */
static int __init it87_find(unsigned short *address)
{
int err = -ENODEV;
superio_enter();
chip_type = superio_inw(DEVID);
if (chip_type != IT8712F_DEVID
&& chip_type != IT8716F_DEVID
&& chip_type != IT8705F_DEVID)
goto exit;
superio_select();
if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
pr_info("it87: Device not activated, skipping\n");
goto exit;
}
*address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
if (*address == 0) {
pr_info("it87: Base address not set, skipping\n");
goto exit;
}
err = 0;
pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
chip_type, *address, superio_inb(DEVREV) & 0x0f);
exit:
superio_exit();
return err;
}
/* This function is called by i2c_probe */
static int it87_detect(struct i2c_adapter *adapter, int address, int kind)
{
int i;
struct i2c_client *new_client;
struct it87_data *data;
int err = 0;
const char *name = "";
int is_isa = i2c_is_isa_adapter(adapter);
int enable_pwm_interface;
if (!is_isa &&
!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto ERROR0;
/* Reserve the ISA region */
if (is_isa)
if (!request_region(address, IT87_EXTENT,
it87_isa_driver.driver.name))
goto ERROR0;
/* For now, we presume we have a valid client. We create the
client structure, even though we cannot fill it completely yet.
But it allows us to access it87_{read,write}_value. */
if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) {
err = -ENOMEM;
goto ERROR1;
}
new_client = &data->client;
if (is_isa)
mutex_init(&data->lock);
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
new_client->driver = is_isa ? &it87_isa_driver : &it87_driver;
new_client->flags = 0;
/* Now, we do the remaining detection. */
if (kind < 0) {
if ((it87_read_value(new_client, IT87_REG_CONFIG) & 0x80)
|| (!is_isa
&& it87_read_value(new_client, IT87_REG_I2C_ADDR) != address)) {
err = -ENODEV;
goto ERROR2;
}
}
/* Determine the chip type. */
if (kind <= 0) {
i = it87_read_value(new_client, IT87_REG_CHIPID);
if (i == 0x90) {
kind = it87;
if (is_isa) {
switch (chip_type) {
case IT8712F_DEVID:
kind = it8712;
break;
case IT8716F_DEVID:
kind = it8716;
break;
}
}
}
else {
if (kind == 0)
dev_info(&adapter->dev,
"Ignoring 'force' parameter for unknown chip at "
"adapter %d, address 0x%02x\n",
i2c_adapter_id(adapter), address);
err = -ENODEV;
goto ERROR2;
}
}
if (kind == it87) {
name = "it87";
} else if (kind == it8712) {
name = "it8712";
} else if (kind == it8716) {
name = "it8716";
}
/* Fill in the remaining client fields and put it into the global list */
strlcpy(new_client->name, name, I2C_NAME_SIZE);
data->type = kind;
data->valid = 0;
mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
goto ERROR2;
if (!is_isa)
dev_info(&new_client->dev, "The I2C interface to IT87xxF "
"hardware monitoring chips is deprecated. Please "
"report if you still rely on it.\n");
/* Check PWM configuration */
enable_pwm_interface = it87_check_pwm(new_client);
/* Initialize the IT87 chip */
it87_init_client(new_client, data);
/* Register sysfs hooks */
data->class_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->class_dev)) {
err = PTR_ERR(data->class_dev);
goto ERROR3;
}
device_create_file(&new_client->dev, &sensor_dev_attr_in0_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in1_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in2_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in3_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in4_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in5_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in6_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in7_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in8_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in0_min.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in1_min.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in2_min.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in3_min.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in4_min.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in5_min.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in6_min.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in7_min.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in0_max.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in1_max.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in2_max.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in3_max.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in4_max.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in5_max.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in6_max.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_in7_max.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp1_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp2_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp3_input.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp1_max.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp2_max.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp3_max.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp1_min.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp2_min.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp3_min.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp1_type.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp2_type.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp3_type.dev_attr);
/* Do not create fan files for disabled fans */
if (data->type == it8716) { /* 16-bit tachometers */
if (data->has_fan & (1 << 0)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_input16.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_min16.dev_attr);
}
if (data->has_fan & (1 << 1)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_input16.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_min16.dev_attr);
}
if (data->has_fan & (1 << 2)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_input16.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_min16.dev_attr);
}
} else {
if (data->has_fan & (1 << 0)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_input.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_min.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_div.dev_attr);
}
if (data->has_fan & (1 << 1)) {