// SPDX-License-Identifier: GPL-2.0
/*
* adm1029 . c - Part of lm_sensors , Linux kernel modules for hardware monitoring
*
* Copyright ( C ) 2006 Corentin LABBE < clabbe . montjoie @ gmail . com >
*
* Based on LM83 Driver by Jean Delvare < jdelvare @ suse . de >
*
* Give only processor , motherboard temperatures and fan tachs
* Very rare chip please let me know if you use it
*
* http : //www.analog.com/UploadedFiles/Data_Sheets/ADM1029.pdf
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon.h>
#include <linux/err.h>
#include <linux/mutex.h>
/*
* Addresses to scan
*/
static const unsigned short normal_i2c[] = { 0 x28, 0 x29, 0 x2a, 0 x2b, 0 x2c, 0 x2d,
0 x2e, 0 x2f, I2C_CLIENT_END
};
/*
* The ADM1029 registers
* Manufacturer ID is 0 x41 for Analog Devices
*/
#define ADM1029_REG_MAN_ID 0 x0D
#define ADM1029_REG_CHIP_ID 0 x0E
#define ADM1029_REG_CONFIG 0 x01
#define ADM1029_REG_NB_FAN_SUPPORT 0 x02
#define ADM1029_REG_TEMP_DEVICES_INSTALLED 0 x06
#define ADM1029_REG_LOCAL_TEMP 0 xA0
#define ADM1029_REG_REMOTE1_TEMP 0 xA1
#define ADM1029_REG_REMOTE2_TEMP 0 xA2
#define ADM1029_REG_LOCAL_TEMP_HIGH 0 x90
#define ADM1029_REG_REMOTE1_TEMP_HIGH 0 x91
#define ADM1029_REG_REMOTE2_TEMP_HIGH 0 x92
#define ADM1029_REG_LOCAL_TEMP_LOW 0 x98
#define ADM1029_REG_REMOTE1_TEMP_LOW 0 x99
#define ADM1029_REG_REMOTE2_TEMP_LOW 0 x9A
#define ADM1029_REG_FAN1 0 x70
#define ADM1029_REG_FAN2 0 x71
#define ADM1029_REG_FAN1_MIN 0 x78
#define ADM1029_REG_FAN2_MIN 0 x79
#define ADM1029_REG_FAN1_CONFIG 0 x68
#define ADM1029_REG_FAN2_CONFIG 0 x69
#define TEMP_FROM_REG(val) ((val) * 1000 )
#define DIV_FROM_REG(val) (1 << (((val) >> 6 ) - 1 ))
/* Registers to be checked by adm1029_update_device() */
static const u8 ADM1029_REG_TEMP[] = {
ADM1029_REG_LOCAL_TEMP,
ADM1029_REG_REMOTE1_TEMP,
ADM1029_REG_REMOTE2_TEMP,
ADM1029_REG_LOCAL_TEMP_HIGH,
ADM1029_REG_REMOTE1_TEMP_HIGH,
ADM1029_REG_REMOTE2_TEMP_HIGH,
ADM1029_REG_LOCAL_TEMP_LOW,
ADM1029_REG_REMOTE1_TEMP_LOW,
ADM1029_REG_REMOTE2_TEMP_LOW,
};
static const u8 ADM1029_REG_FAN[] = {
ADM1029_REG_FAN1,
ADM1029_REG_FAN2,
ADM1029_REG_FAN1_MIN,
ADM1029_REG_FAN2_MIN,
};
static const u8 ADM1029_REG_FAN_DIV[] = {
ADM1029_REG_FAN1_CONFIG,
ADM1029_REG_FAN2_CONFIG,
};
/*
* Client data ( each client gets its own )
*/
struct adm1029_data {
struct i2c_client *client;
struct mutex update_lock; /* protect register access */
bool valid; /* false until following fields are valid */
unsigned long last_updated; /* in jiffies */
/* registers values, signed for temperature, unsigned for other stuff */
s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)];
u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)];
u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)];
};
/*
* function that update the status of the chips ( temperature for example )
*/
static struct adm1029_data *adm1029_update_device(struct device *dev)
{
struct adm1029_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
mutex_lock(&data->update_lock);
/*
* Use the " cache " Luke , don ' t recheck values
* if there are already checked not a long time later
*/
if (time_after(jiffies, data->last_updated + HZ * 2 ) || !data->valid) {
int nr;
dev_dbg(&client->dev, "Updating adm1029 data\n" );
for (nr = 0 ; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) {
data->temp[nr] =
i2c_smbus_read_byte_data(client,
ADM1029_REG_TEMP[nr]);
}
for (nr = 0 ; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) {
data->fan[nr] =
i2c_smbus_read_byte_data(client,
ADM1029_REG_FAN[nr]);
}
for (nr = 0 ; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) {
data->fan_div[nr] =
i2c_smbus_read_byte_data(client,
ADM1029_REG_FAN_DIV[nr]);
}
data->last_updated = jiffies;
data->valid = true ;
}
mutex_unlock(&data->update_lock);
return data;
}
/*
* Sysfs stuff
*/
static ssize_t
temp_show(struct device *dev, struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adm1029_data *data = adm1029_update_device(dev);
return sprintf(buf, "%d\n" , TEMP_FROM_REG(data->temp[attr->index]));
}
static ssize_t
fan_show(struct device *dev, struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adm1029_data *data = adm1029_update_device(dev);
u16 val;
if (data->fan[attr->index] == 0 ||
(data->fan_div[attr->index] & 0 xC0) == 0 ||
data->fan[attr->index] == 255 ) {
return sprintf(buf, "0\n" );
}
val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index])
/ data->fan[attr->index];
return sprintf(buf, "%d\n" , val);
}
static ssize_t
fan_div_show(struct device *dev, struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adm1029_data *data = adm1029_update_device(dev);
if ((data->fan_div[attr->index] & 0 xC0) == 0 )
return sprintf(buf, "0\n" );
return sprintf(buf, "%d\n" , DIV_FROM_REG(data->fan_div[attr->index]));
}
static ssize_t fan_div_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct adm1029_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
u8 reg;
long val;
int ret = kstrtol(buf, 10 , &val);
if (ret < 0 )
return ret;
mutex_lock(&data->update_lock);
/*Read actual config */
reg = i2c_smbus_read_byte_data(client,
ADM1029_REG_FAN_DIV[attr->index]);
switch (val) {
case 1 :
val = 1 ;
break ;
case 2 :
val = 2 ;
break ;
case 4 :
val = 3 ;
break ;
default :
mutex_unlock(&data->update_lock);
dev_err(&client->dev,
"fan_div value %ld not supported. Choose one of 1, 2 or 4!\n" ,
val);
return -EINVAL;
}
/* Update the value */
reg = (reg & 0 x3F) | (val << 6 );
/* Update the cache */
data->fan_div[attr->index] = reg;
/* Write value */
i2c_smbus_write_byte_data(client,
ADM1029_REG_FAN_DIV[attr->index], reg);
mutex_unlock(&data->update_lock);
return count;
}
/* Access rights on sysfs. */
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0 );
static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1 );
static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2 );
static SENSOR_DEVICE_ATTR_RO(temp1_max, temp, 3 );
static SENSOR_DEVICE_ATTR_RO(temp2_max, temp, 4 );
static SENSOR_DEVICE_ATTR_RO(temp3_max, temp, 5 );
static SENSOR_DEVICE_ATTR_RO(temp1_min, temp, 6 );
static SENSOR_DEVICE_ATTR_RO(temp2_min, temp, 7 );
static SENSOR_DEVICE_ATTR_RO(temp3_min, temp, 8 );
static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0 );
static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1 );
static SENSOR_DEVICE_ATTR_RO(fan1_min, fan, 2 );
static SENSOR_DEVICE_ATTR_RO(fan2_min, fan, 3 );
static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0 );
static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1 );
static struct attribute *adm1029_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp3_min.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_fan2_input.dev_attr.attr,
&sensor_dev_attr_fan1_min.dev_attr.attr,
&sensor_dev_attr_fan2_min.dev_attr.attr,
&sensor_dev_attr_fan1_div.dev_attr.attr,
&sensor_dev_attr_fan2_div.dev_attr.attr,
NULL
};
ATTRIBUTE_GROUPS(adm1029);
/*
* Real code
*/
/* Return 0 if detection is successful, -ENODEV otherwise */
static int adm1029_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
u8 man_id, chip_id, temp_devices_installed, nb_fan_support;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
/*
* ADM1029 doesn ' t have CHIP ID , check just MAN ID
* For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED ,
* ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values
* documented
*/
man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID);
chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID);
temp_devices_installed = i2c_smbus_read_byte_data(client,
ADM1029_REG_TEMP_DEVICES_INSTALLED);
nb_fan_support = i2c_smbus_read_byte_data(client,
ADM1029_REG_NB_FAN_SUPPORT);
/* 0x41 is Analog Devices */
if (man_id != 0 x41 || (temp_devices_installed & 0 xf9) != 0 x01 ||
nb_fan_support != 0 x03)
return -ENODEV;
if ((chip_id & 0 xF0) != 0 x00) {
/*
* There are no " official " CHIP ID , so actually
* we use Major / Minor revision for that
*/
pr_info("Unknown major revision %x, please let us know\n" ,
chip_id);
return -ENODEV;
}
strscpy(info->type, "adm1029" , I2C_NAME_SIZE);
return 0 ;
}
static int adm1029_init_client(struct i2c_client *client)
{
u8 config;
config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
if ((config & 0 x10) == 0 ) {
i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG,
config | 0 x10);
}
/* recheck config */
config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
if ((config & 0 x10) == 0 ) {
dev_err(&client->dev, "Initialization failed!\n" );
return 0 ;
}
return 1 ;
}
static int adm1029_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct adm1029_data *data;
struct device *hwmon_dev;
data = devm_kzalloc(dev, sizeof (struct adm1029_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->client = client;
mutex_init(&data->update_lock);
/*
* Initialize the ADM1029 chip
* Check config register
*/
if (adm1029_init_client(client) == 0 )
return -ENODEV;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data,
adm1029_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id adm1029_id[] = {
{ "adm1029" },
{ }
};
MODULE_DEVICE_TABLE(i2c, adm1029_id);
static struct i2c_driver adm1029_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "adm1029" ,
},
.probe = adm1029_probe,
.id_table = adm1029_id,
.detect = adm1029_detect,
.address_list = normal_i2c,
};
module_i2c_driver(adm1029_driver);
MODULE_AUTHOR("Corentin LABBE <clabbe.montjoie@gmail.com>" );
MODULE_DESCRIPTION("adm1029 driver" );
MODULE_LICENSE("GPL v2" );
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