507 lines
14 KiB
C
507 lines
14 KiB
C
/*
|
|
* 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_attach_adapter(struct i2c_adapter *adapter);
|
|
static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind);
|
|
static int adm1029_detach_client(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 struct i2c_driver adm1029_driver = {
|
|
.driver = {
|
|
.name = "adm1029",
|
|
},
|
|
.attach_adapter = adm1029_attach_adapter,
|
|
.detach_client = adm1029_detach_client,
|
|
};
|
|
|
|
/*
|
|
* Client data (each client gets its own)
|
|
*/
|
|
|
|
struct adm1029_data {
|
|
struct i2c_client client;
|
|
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] == 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] == 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, 0);
|
|
static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
|
|
show_fan_div, set_fan_div, 1);
|
|
|
|
static struct attribute *adm1029_attributes[] = {
|
|
&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
|
|
};
|
|
|
|
static const struct attribute_group adm1029_group = {
|
|
.attrs = adm1029_attributes,
|
|
};
|
|
|
|
/*
|
|
* Real code
|
|
*/
|
|
|
|
static int adm1029_attach_adapter(struct i2c_adapter *adapter)
|
|
{
|
|
if (!(adapter->class & I2C_CLASS_HWMON))
|
|
return 0;
|
|
return i2c_probe(adapter, &addr_data, adm1029_detect);
|
|
}
|
|
|
|
/*
|
|
* The following function does more than just detection. If detection
|
|
* succeeds, it also registers the new chip.
|
|
*/
|
|
|
|
static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind)
|
|
{
|
|
struct i2c_client *client;
|
|
struct adm1029_data *data;
|
|
int err = 0;
|
|
const char *name = "";
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
goto exit;
|
|
|
|
if (!(data = kzalloc(sizeof(struct adm1029_data), GFP_KERNEL))) {
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
client = &data->client;
|
|
i2c_set_clientdata(client, data);
|
|
client->addr = address;
|
|
client->adapter = adapter;
|
|
client->driver = &adm1029_driver;
|
|
|
|
/* Now we do the detection and identification. A negative kind
|
|
* means that the driver was loaded with no force parameter
|
|
* (default), so we must both detect and identify the chip
|
|
* (actually there is only one possible kind of chip for now, adm1029).
|
|
* A zero kind means that the driver was loaded with the force
|
|
* parameter, the detection step shall be skipped. A positive kind
|
|
* means that the driver was loaded with the force parameter and a
|
|
* given kind of chip is requested, so both the detection and the
|
|
* identification steps are skipped. */
|
|
|
|
/* Default to an adm1029 if forced */
|
|
if (kind == 0)
|
|
kind = adm1029;
|
|
|
|
/* 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
|
|
*/
|
|
|
|
if (kind <= 0) { /* identification */
|
|
u8 man_id, chip_id, temp_devices_installed, nb_fan_support;
|
|
|
|
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) {
|
|
if ((chip_id & 0xF0) == 0x00) {
|
|
kind = adm1029;
|
|
} else {
|
|
/* There are no "official" CHIP ID, so actually
|
|
* we use Major/Minor revision for that */
|
|
printk(KERN_INFO
|
|
"adm1029: Unknown major revision %x, "
|
|
"please let us know\n", chip_id);
|
|
}
|
|
}
|
|
|
|
if (kind <= 0) { /* identification failed */
|
|
pr_debug("adm1029: Unsupported chip (man_id=0x%02X, "
|
|
"chip_id=0x%02X)\n", man_id, chip_id);
|
|
goto exit_free;
|
|
}
|
|
}
|
|
|
|
if (kind == adm1029) {
|
|
name = "adm1029";
|
|
}
|
|
|
|
/* We can fill in the remaining client fields */
|
|
strlcpy(client->name, name, I2C_NAME_SIZE);
|
|
mutex_init(&data->update_lock);
|
|
|
|
/* Tell the I2C layer a new client has arrived */
|
|
if ((err = i2c_attach_client(client)))
|
|
goto exit_free;
|
|
|
|
/*
|
|
* Initialize the ADM1029 chip
|
|
* Check config register
|
|
*/
|
|
if (adm1029_init_client(client) == 0)
|
|
goto exit_detach;
|
|
|
|
/* Register sysfs hooks */
|
|
if ((err = sysfs_create_group(&client->dev.kobj, &adm1029_group)))
|
|
goto exit_detach;
|
|
|
|
data->hwmon_dev = hwmon_device_register(&client->dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
goto exit_remove_files;
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_remove_files:
|
|
sysfs_remove_group(&client->dev.kobj, &adm1029_group);
|
|
exit_detach:
|
|
i2c_detach_client(client);
|
|
exit_free:
|
|
kfree(data);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
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_detach_client(struct i2c_client *client)
|
|
{
|
|
struct adm1029_data *data = i2c_get_clientdata(client);
|
|
int err;
|
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
sysfs_remove_group(&client->dev.kobj, &adm1029_group);
|
|
|
|
if ((err = i2c_detach_client(client)))
|
|
return err;
|
|
|
|
kfree(data);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
function that update the status of the chips (temperature for exemple)
|
|
*/
|
|
static struct adm1029_data *adm1029_update_device(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct adm1029_data *data = i2c_get_clientdata(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 = 1;
|
|
}
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return data;
|
|
}
|
|
|
|
/*
|
|
Common module stuff
|
|
*/
|
|
static int __init sensors_adm1029_init(void)
|
|
{
|
|
|
|
return i2c_add_driver(&adm1029_driver);
|
|
}
|
|
|
|
static void __exit sensors_adm1029_exit(void)
|
|
{
|
|
|
|
i2c_del_driver(&adm1029_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Corentin LABBE <corentin.labbe@geomatys.fr>");
|
|
MODULE_DESCRIPTION("adm1029 driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
module_init(sensors_adm1029_init);
|
|
module_exit(sensors_adm1029_exit);
|