// 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[] = {
0x28,
0x29,
0x2a,
0x2b,
0x2c,
0x2d,
0x2e,
0x2f, I2C_CLIENT_END
};
/*
* The ADM1029 registers
* Manufacturer ID is 0x41 for Analog Devices
*/
#define ADM1029_REG_MAN_ID
0x0D
#define ADM1029_REG_CHIP_ID
0x0E
#define ADM1029_REG_CONFIG
0x01
#define ADM1029_REG_NB_FAN_SUPPORT
0x02
#define ADM1029_REG_TEMP_DEVICES_INSTALLED
0x06
#define ADM1029_REG_LOCAL_TEMP
0xA0
#define ADM1029_REG_REMOTE1_TEMP
0xA1
#define ADM1029_REG_REMOTE2_TEMP
0xA2
#define ADM1029_REG_LOCAL_TEMP_HIGH
0x90
#define ADM1029_REG_REMOTE1_TEMP_HIGH
0x91
#define ADM1029_REG_REMOTE2_TEMP_HIGH
0x92
#define ADM1029_REG_LOCAL_TEMP_LOW
0x98
#define ADM1029_REG_REMOTE1_TEMP_LOW
0x99
#define ADM1029_REG_REMOTE2_TEMP_LOW
0x9A
#define ADM1029_REG_FAN1
0x70
#define ADM1029_REG_FAN2
0x71
#define ADM1029_REG_FAN1_MIN
0x78
#define ADM1029_REG_FAN2_MIN
0x79
#define ADM1029_REG_FAN1_CONFIG
0x68
#define ADM1029_REG_FAN2_CONFIG
0x69
#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] &
0xC0) ==
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] &
0xC0) ==
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 &
0x3F) | (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 !=
0x41 || (temp_devices_installed &
0xf9) !=
0x01 ||
nb_fan_support !=
0x03)
return -ENODEV;
if ((chip_id &
0xF0) !=
0x00) {
/*
* 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 &
0x10) ==
0) {
i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG,
config |
0x10);
}
/* recheck config */
config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
if ((config &
0x10) ==
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");
