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linux/drivers/hwmon/gl518sm.c
Jean Delvare 72240307e9 hwmon: (gl518sm) Fix the reported fan speed 
The fan speeds reported by the gl518sm driver are twice as much as they
should. It's currently reporting the number of pulses per minute, not
rotations per minute, while typical fans emit two pulses per rotation.
This explains why all reports with this driver had very high speed
values (between 9000 to 12000 RPM). Odd that nobody ever actually
complained about this bug.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
2008-02-07 20:39:41 -05:00

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/*
* gl518sm.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
* Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
* Kyosti Malkki <kmalkki@cc.hut.fi>
* Copyright (C) 2004 Hong-Gunn Chew <hglinux@gunnet.org> and
* Jean Delvare <khali@linux-fr.org>
*
* 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.
*
* Ported to Linux 2.6 by Hong-Gunn Chew with the help of Jean Delvare
* and advice of Greg Kroah-Hartman.
*
* Notes about the port:
* Release 0x00 of the GL518SM chipset doesn't support reading of in0,
* in1 nor in2. The original driver had an ugly workaround to get them
* anyway (changing limits and watching alarms trigger and wear off).
* We did not keep that part of the original driver in the Linux 2.6
* version, since it was making the driver significantly more complex
* with no real benefit.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
/* Insmod parameters */
I2C_CLIENT_INSMOD_2(gl518sm_r00, gl518sm_r80);
/* Many GL518 constants specified below */
/* The GL518 registers */
#define GL518_REG_CHIP_ID 0x00
#define GL518_REG_REVISION 0x01
#define GL518_REG_VENDOR_ID 0x02
#define GL518_REG_CONF 0x03
#define GL518_REG_TEMP_IN 0x04
#define GL518_REG_TEMP_MAX 0x05
#define GL518_REG_TEMP_HYST 0x06
#define GL518_REG_FAN_COUNT 0x07
#define GL518_REG_FAN_LIMIT 0x08
#define GL518_REG_VIN1_LIMIT 0x09
#define GL518_REG_VIN2_LIMIT 0x0a
#define GL518_REG_VIN3_LIMIT 0x0b
#define GL518_REG_VDD_LIMIT 0x0c
#define GL518_REG_VIN3 0x0d
#define GL518_REG_MISC 0x0f
#define GL518_REG_ALARM 0x10
#define GL518_REG_MASK 0x11
#define GL518_REG_INT 0x12
#define GL518_REG_VIN2 0x13
#define GL518_REG_VIN1 0x14
#define GL518_REG_VDD 0x15
/*
* Conversions. Rounding and limit checking is only done on the TO_REG
* variants. Note that you should be a bit careful with which arguments
* these macros are called: arguments may be evaluated more than once.
* Fixing this is just not worth it.
*/
#define RAW_FROM_REG(val) val
#define BOOL_FROM_REG(val) ((val)?0:1)
#define BOOL_TO_REG(val) ((val)?0:1)
#define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0? \
(val)-500:(val)+500)/1000)+119),0,255))
#define TEMP_FROM_REG(val) (((val) - 119) * 1000)
static inline u8 FAN_TO_REG(long rpm, int div)
{
long rpmdiv;
if (rpm == 0)
return 0;
rpmdiv = SENSORS_LIMIT(rpm, 1, 960000) * div;
return SENSORS_LIMIT((480000 + rpmdiv / 2) / rpmdiv, 1, 255);
}
#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val)*(div))))
#define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
#define IN_FROM_REG(val) ((val)*19)
#define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
#define VDD_FROM_REG(val) (((val)*95+2)/4)
#define DIV_FROM_REG(val) (1 << (val))
#define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask)
#define BEEP_MASK_FROM_REG(val) ((val) & 0x7f)
/* Each client has this additional data */
struct gl518_data {
struct i2c_client client;
struct device *hwmon_dev;
enum chips type;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 voltage_in[4]; /* Register values; [0] = VDD */
u8 voltage_min[4]; /* Register values; [0] = VDD */
u8 voltage_max[4]; /* Register values; [0] = VDD */
u8 fan_in[2];
u8 fan_min[2];
u8 fan_div[2]; /* Register encoding, shifted right */
u8 fan_auto1; /* Boolean */
u8 temp_in; /* Register values */
u8 temp_max; /* Register values */
u8 temp_hyst; /* Register values */
u8 alarms; /* Register value */
u8 alarm_mask;
u8 beep_mask; /* Register value */
u8 beep_enable; /* Boolean */
};
static int gl518_attach_adapter(struct i2c_adapter *adapter);
static int gl518_detect(struct i2c_adapter *adapter, int address, int kind);
static void gl518_init_client(struct i2c_client *client);
static int gl518_detach_client(struct i2c_client *client);
static int gl518_read_value(struct i2c_client *client, u8 reg);
static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value);
static struct gl518_data *gl518_update_device(struct device *dev);
/* This is the driver that will be inserted */
static struct i2c_driver gl518_driver = {
.driver = {
.name = "gl518sm",
},
.attach_adapter = gl518_attach_adapter,
.detach_client = gl518_detach_client,
};
/*
* Sysfs stuff
*/
#define show(type, suffix, value) \
static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct gl518_data *data = gl518_update_device(dev); \
return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \
}
show(TEMP, temp_input1, temp_in);
show(TEMP, temp_max1, temp_max);
show(TEMP, temp_hyst1, temp_hyst);
show(BOOL, fan_auto1, fan_auto1);
show(VDD, in_input0, voltage_in[0]);
show(IN, in_input1, voltage_in[1]);
show(IN, in_input2, voltage_in[2]);
show(IN, in_input3, voltage_in[3]);
show(VDD, in_min0, voltage_min[0]);
show(IN, in_min1, voltage_min[1]);
show(IN, in_min2, voltage_min[2]);
show(IN, in_min3, voltage_min[3]);
show(VDD, in_max0, voltage_max[0]);
show(IN, in_max1, voltage_max[1]);
show(IN, in_max2, voltage_max[2]);
show(IN, in_max3, voltage_max[3]);
show(RAW, alarms, alarms);
show(BOOL, beep_enable, beep_enable);
show(BEEP_MASK, beep_mask, beep_mask);
static ssize_t show_fan_input(struct device *dev,
struct device_attribute *attr, char *buf)
{
int nr = to_sensor_dev_attr(attr)->index;
struct gl518_data *data = gl518_update_device(dev);
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr],
DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t show_fan_min(struct device *dev,
struct device_attribute *attr, char *buf)
{
int nr = to_sensor_dev_attr(attr)->index;
struct gl518_data *data = gl518_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)
{
int nr = to_sensor_dev_attr(attr)->index;
struct gl518_data *data = gl518_update_device(dev);
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
}
#define set(type, suffix, value, reg) \
static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct gl518_data *data = i2c_get_clientdata(client); \
long val = simple_strtol(buf, NULL, 10); \
\
mutex_lock(&data->update_lock); \
data->value = type##_TO_REG(val); \
gl518_write_value(client, reg, data->value); \
mutex_unlock(&data->update_lock); \
return count; \
}
#define set_bits(type, suffix, value, reg, mask, shift) \
static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct gl518_data *data = i2c_get_clientdata(client); \
int regvalue; \
unsigned long val = simple_strtoul(buf, NULL, 10); \
\
mutex_lock(&data->update_lock); \
regvalue = gl518_read_value(client, reg); \
data->value = type##_TO_REG(val); \
regvalue = (regvalue & ~mask) | (data->value << shift); \
gl518_write_value(client, reg, regvalue); \
mutex_unlock(&data->update_lock); \
return count; \
}
#define set_low(type, suffix, value, reg) \
set_bits(type, suffix, value, reg, 0x00ff, 0)
#define set_high(type, suffix, value, reg) \
set_bits(type, suffix, value, reg, 0xff00, 8)
set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl518_data *data = i2c_get_clientdata(client);
int nr = to_sensor_dev_attr(attr)->index;
int regvalue;
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
regvalue = (regvalue & (0xff << (8 * nr)))
| (data->fan_min[nr] << (8 * (1 - nr)));
gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
if (data->fan_min[nr] == 0)
data->alarm_mask &= ~(0x20 << nr);
else
data->alarm_mask |= (0x20 << nr);
data->beep_mask &= data->alarm_mask;
gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
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 i2c_client *client = to_i2c_client(dev);
struct gl518_data *data = i2c_get_clientdata(client);
int nr = to_sensor_dev_attr(attr)->index;
int regvalue;
unsigned long val = simple_strtoul(buf, NULL, 10);
switch (val) {
case 1: val = 0; break;
case 2: val = 1; break;
case 4: val = 2; break;
case 8: val = 3; break;
default:
dev_err(dev, "Invalid fan clock divider %lu, choose one "
"of 1, 2, 4 or 8\n", val);
return -EINVAL;
}
mutex_lock(&data->update_lock);
regvalue = gl518_read_value(client, GL518_REG_MISC);
data->fan_div[nr] = val;
regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
| (data->fan_div[nr] << (6 - 2 * nr));
gl518_write_value(client, GL518_REG_MISC, regvalue);
mutex_unlock(&data->update_lock);
return count;
}
static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
show_temp_hyst1, set_temp_hyst1);
static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO,
show_fan_min, set_fan_min, 0);
static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO,
show_fan_min, set_fan_min, 1);
static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO,
show_fan_div, set_fan_div, 0);
static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO,
show_fan_div, set_fan_div, 1);
static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
show_beep_enable, set_beep_enable);
static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
show_beep_mask, set_beep_mask);
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
char *buf)
{
int bitnr = to_sensor_dev_attr(attr)->index;
struct gl518_data *data = gl518_update_device(dev);
return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
}
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6);
static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
char *buf)
{
int bitnr = to_sensor_dev_attr(attr)->index;
struct gl518_data *data = gl518_update_device(dev);
return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
}
static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl518_data *data = i2c_get_clientdata(client);
int bitnr = to_sensor_dev_attr(attr)->index;
unsigned long bit;
bit = simple_strtoul(buf, NULL, 10);
if (bit & ~1)
return -EINVAL;
mutex_lock(&data->update_lock);
data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
if (bit)
data->beep_mask |= (1 << bitnr);
else
data->beep_mask &= ~(1 << bitnr);
gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0);
static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1);
static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2);
static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3);
static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4);
static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5);
static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6);
static struct attribute *gl518_attributes[] = {
&dev_attr_in3_input.attr,
&dev_attr_in0_min.attr,
&dev_attr_in1_min.attr,
&dev_attr_in2_min.attr,
&dev_attr_in3_min.attr,
&dev_attr_in0_max.attr,
&dev_attr_in1_max.attr,
&dev_attr_in2_max.attr,
&dev_attr_in3_max.attr,
&sensor_dev_attr_in0_alarm.dev_attr.attr,
&sensor_dev_attr_in1_alarm.dev_attr.attr,
&sensor_dev_attr_in2_alarm.dev_attr.attr,
&sensor_dev_attr_in3_alarm.dev_attr.attr,
&sensor_dev_attr_in0_beep.dev_attr.attr,
&sensor_dev_attr_in1_beep.dev_attr.attr,
&sensor_dev_attr_in2_beep.dev_attr.attr,
&sensor_dev_attr_in3_beep.dev_attr.attr,
&dev_attr_fan1_auto.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,
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
&sensor_dev_attr_fan1_beep.dev_attr.attr,
&sensor_dev_attr_fan2_beep.dev_attr.attr,
&dev_attr_temp1_input.attr,
&dev_attr_temp1_max.attr,
&dev_attr_temp1_max_hyst.attr,
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_beep.dev_attr.attr,
&dev_attr_alarms.attr,
&dev_attr_beep_enable.attr,
&dev_attr_beep_mask.attr,
NULL
};
static const struct attribute_group gl518_group = {
.attrs = gl518_attributes,
};
static struct attribute *gl518_attributes_r80[] = {
&dev_attr_in0_input.attr,
&dev_attr_in1_input.attr,
&dev_attr_in2_input.attr,
NULL
};
static const struct attribute_group gl518_group_r80 = {
.attrs = gl518_attributes_r80,
};
/*
* Real code
*/
static int gl518_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, gl518_detect);
}
static int gl518_detect(struct i2c_adapter *adapter, int address, int kind)
{
int i;
struct i2c_client *client;
struct gl518_data *data;
int err = 0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA))
goto exit;
/* OK. For now, we presume we have a valid client. We now create the
client structure, even though we cannot fill it completely yet.
But it allows us to access gl518_{read,write}_value. */
if (!(data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
client = &data->client;
i2c_set_clientdata(client, data);
client->addr = address;
client->adapter = adapter;
client->driver = &gl518_driver;
/* Now, we do the remaining detection. */
if (kind < 0) {
if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
|| (gl518_read_value(client, GL518_REG_CONF) & 0x80))
goto exit_free;
}
/* Determine the chip type. */
if (kind <= 0) {
i = gl518_read_value(client, GL518_REG_REVISION);
if (i == 0x00) {
kind = gl518sm_r00;
} else if (i == 0x80) {
kind = gl518sm_r80;
} 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);
goto exit_free;
}
}
/* Fill in the remaining client fields */
strlcpy(client->name, "gl518sm", I2C_NAME_SIZE);
data->type = kind;
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 GL518SM chip */
data->alarm_mask = 0xff;
gl518_init_client(client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group)))
goto exit_detach;
if (data->type == gl518sm_r80)
if ((err = sysfs_create_group(&client->dev.kobj,
&gl518_group_r80)))
goto exit_remove_files;
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, &gl518_group);
if (data->type == gl518sm_r80)
sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
exit_detach:
i2c_detach_client(client);
exit_free:
kfree(data);
exit:
return err;
}
/* Called when we have found a new GL518SM.
Note that we preserve D4:NoFan2 and D2:beep_enable. */
static void gl518_init_client(struct i2c_client *client)
{
/* Make sure we leave D7:Reset untouched */
u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
/* Comparator mode (D3=0), standby mode (D6=0) */
gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
/* Never interrupts */
gl518_write_value(client, GL518_REG_MASK, 0x00);
/* Clear status register (D5=1), start (D6=1) */
gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
}
static int gl518_detach_client(struct i2c_client *client)
{
struct gl518_data *data = i2c_get_clientdata(client);
int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &gl518_group);
if (data->type == gl518sm_r80)
sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
if ((err = i2c_detach_client(client)))
return err;
kfree(data);
return 0;
}
/* Registers 0x07 to 0x0c are word-sized, others are byte-sized
GL518 uses a high-byte first convention, which is exactly opposite to
the SMBus standard. */
static int gl518_read_value(struct i2c_client *client, u8 reg)
{
if ((reg >= 0x07) && (reg <= 0x0c))
return swab16(i2c_smbus_read_word_data(client, reg));
else
return i2c_smbus_read_byte_data(client, reg);
}
static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
{
if ((reg >= 0x07) && (reg <= 0x0c))
return i2c_smbus_write_word_data(client, reg, swab16(value));
else
return i2c_smbus_write_byte_data(client, reg, value);
}
static struct gl518_data *gl518_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl518_data *data = i2c_get_clientdata(client);
int val;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
dev_dbg(&client->dev, "Starting gl518 update\n");
data->alarms = gl518_read_value(client, GL518_REG_INT);
data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
data->voltage_min[0] = val & 0xff;
data->voltage_max[0] = (val >> 8) & 0xff;
val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
data->voltage_min[1] = val & 0xff;
data->voltage_max[1] = (val >> 8) & 0xff;
val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
data->voltage_min[2] = val & 0xff;
data->voltage_max[2] = (val >> 8) & 0xff;
val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
data->voltage_min[3] = val & 0xff;
data->voltage_max[3] = (val >> 8) & 0xff;
val = gl518_read_value(client, GL518_REG_FAN_COUNT);
data->fan_in[0] = (val >> 8) & 0xff;
data->fan_in[1] = val & 0xff;
val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
data->fan_min[0] = (val >> 8) & 0xff;
data->fan_min[1] = val & 0xff;
data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
data->temp_max =
gl518_read_value(client, GL518_REG_TEMP_MAX);
data->temp_hyst =
gl518_read_value(client, GL518_REG_TEMP_HYST);
val = gl518_read_value(client, GL518_REG_MISC);
data->fan_div[0] = (val >> 6) & 0x03;
data->fan_div[1] = (val >> 4) & 0x03;
data->fan_auto1 = (val >> 3) & 0x01;
data->alarms &= data->alarm_mask;
val = gl518_read_value(client, GL518_REG_CONF);
data->beep_enable = (val >> 2) & 1;
if (data->type != gl518sm_r00) {
data->voltage_in[0] =
gl518_read_value(client, GL518_REG_VDD);
data->voltage_in[1] =
gl518_read_value(client, GL518_REG_VIN1);
data->voltage_in[2] =
gl518_read_value(client, GL518_REG_VIN2);
}
data->voltage_in[3] =
gl518_read_value(client, GL518_REG_VIN3);
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
static int __init sensors_gl518sm_init(void)
{
return i2c_add_driver(&gl518_driver);
}
static void __exit sensors_gl518sm_exit(void)
{
i2c_del_driver(&gl518_driver);
}
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
"Kyosti Malkki <kmalkki@cc.hut.fi> and "
"Hong-Gunn Chew <hglinux@gunnet.org>");
MODULE_DESCRIPTION("GL518SM driver");
MODULE_LICENSE("GPL");
module_init(sensors_gl518sm_init);
module_exit(sensors_gl518sm_exit);
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