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|
/*
* adm1029.c - Part of lm_sensors, Linux kernel modules for hardware monitoring
*
* Copyright (C) 2006 Corentin LABBE <corentin.labbe@geomatys.fr>
*
* Based on LM83 Driver by Jean Delvare <khali@linux-fr.org>
*
* 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
*
*
* 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 version 2 of the License
*
* 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.
*/
#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
};
/*
* Insmod parameters
*/
I2C_CLIENT_INSMOD_1(adm1029);
/*
* 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,
};
/*
* Functions declaration
*/
static int adm1029_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int adm1029_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info);
static int adm1029_remove(struct i2c_client *client);
static struct adm1029_data *adm1029_update_device(struct device *dev);
static int adm1029_init_client(struct i2c_client *client);
/*
* Driver data (common to all clients)
*/
static const struct i2c_device_id adm1029_id[] = {
{ "adm1029", adm1029 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adm1029_id);
static struct i2c_driver adm1029_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "adm1029",
},
.probe = adm1029_probe,
.remove = adm1029_remove,
.id_table = adm1029_id,
.detect = adm1029_detect,
.address_data = &addr_data,
};
/*
* Client data (each client gets its own)
*/
struct adm1029_data {
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero 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)];
};
/*
* Sysfs stuff
*/
static ssize_t
show_temp(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
show_fan(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
show_fan_div(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 set_fan_div(struct device *dev,
struct device_attribute *devattr, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1029_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
long val = simple_strtol(buf, NULL, 10);
u8 reg;
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);
/* 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, S_IRUGO stand for Is Readable by User, Group and Others
S_IWUSR stand for Is Writable by User
*/
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, 3);
static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp, NULL, 4);
static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp, NULL, 5);
static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp, NULL, 6);
static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp, NULL, 7);
static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp, NULL, 8);
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan, NULL, 2);
static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan, NULL, 3);
static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
show_fan_div, set_fan_div
|