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linux/drivers/hwmon/gl520sm.c
Jean Delvare 90f4102ce5 hwmon: Use i2c_smbus_{read,write}_word_swapped 
Make use of the new i2c_smbus_{read,write}_word_swapped functions.
This makes the driver code more compact and readable. It also ensures
proper error handling.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: Dirk Eibach <eibach@gdsys.de>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Guillaume Ligneul <guillaume.ligneul@gmail.com>
2011-11-04 12:00:47 +01:00

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/*
gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring
Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
Kyösti Mälkki <kmalkki@cc.hut.fi>
Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
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.
*/
#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/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
/* Type of the extra sensor */
static unsigned short extra_sensor_type;
module_param(extra_sensor_type, ushort, 0);
MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
/* Many GL520 constants specified below
One of the inputs can be configured as either temp or voltage.
That's why _TEMP2 and _IN4 access the same register
*/
/* The GL520 registers */
#define GL520_REG_CHIP_ID 0x00
#define GL520_REG_REVISION 0x01
#define GL520_REG_CONF 0x03
#define GL520_REG_MASK 0x11
#define GL520_REG_VID_INPUT 0x02
static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
#define GL520_REG_FAN_INPUT 0x07
#define GL520_REG_FAN_MIN 0x08
#define GL520_REG_FAN_DIV 0x0f
#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
#define GL520_REG_ALARMS 0x12
#define GL520_REG_BEEP_MASK 0x10
#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
/*
* Function declarations
*/
static int gl520_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
static void gl520_init_client(struct i2c_client *client);
static int gl520_remove(struct i2c_client *client);
static int gl520_read_value(struct i2c_client *client, u8 reg);
static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
static struct gl520_data *gl520_update_device(struct device *dev);
/* Driver data */
static const struct i2c_device_id gl520_id[] = {
{ "gl520sm", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, gl520_id);
static struct i2c_driver gl520_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "gl520sm",
},
.probe = gl520_probe,
.remove = gl520_remove,
.id_table = gl520_id,
.detect = gl520_detect,
.address_list = normal_i2c,
};
/* Client data */
struct gl520_data {
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until the following fields are valid */
unsigned long last_updated; /* in jiffies */
u8 vid;
u8 vrm;
u8 in_input[5]; /* [0] = VVD */
u8 in_min[5]; /* [0] = VDD */
u8 in_max[5]; /* [0] = VDD */
u8 fan_input[2];
u8 fan_min[2];
u8 fan_div[2];
u8 fan_off;
u8 temp_input[2];
u8 temp_max[2];
u8 temp_max_hyst[2];
u8 alarms;
u8 beep_enable;
u8 beep_mask;
u8 alarm_mask;
u8 two_temps;
};
/*
* Sysfs stuff
*/
static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
#define VDD_FROM_REG(val) (((val)*95+2)/4)
#define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
#define IN_FROM_REG(val) ((val)*19)
#define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
u8 r = data->in_input[n];
if (n == 0)
return sprintf(buf, "%d\n", VDD_FROM_REG(r));
else
return sprintf(buf, "%d\n", IN_FROM_REG(r));
}
static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
u8 r = data->in_min[n];
if (n == 0)
return sprintf(buf, "%d\n", VDD_FROM_REG(r));
else
return sprintf(buf, "%d\n", IN_FROM_REG(r));
}
static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
u8 r = data->in_max[n];
if (n == 0)
return sprintf(buf, "%d\n", VDD_FROM_REG(r));
else
return sprintf(buf, "%d\n", IN_FROM_REG(r));
}
static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl520_data *data = i2c_get_clientdata(client);
int n = to_sensor_dev_attr(attr)->index;
long v = simple_strtol(buf, NULL, 10);
u8 r;
mutex_lock(&data->update_lock);
if (n == 0)
r = VDD_TO_REG(v);
else
r = IN_TO_REG(v);
data->in_min[n] = r;
if (n < 4)
gl520_write_value(client, GL520_REG_IN_MIN[n],
(gl520_read_value(client, GL520_REG_IN_MIN[n])
& ~0xff) | r);
else
gl520_write_value(client, GL520_REG_IN_MIN[n], r);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl520_data *data = i2c_get_clientdata(client);
int n = to_sensor_dev_attr(attr)->index;
long v = simple_strtol(buf, NULL, 10);
u8 r;
if (n == 0)
r = VDD_TO_REG(v);
else
r = IN_TO_REG(v);
mutex_lock(&data->update_lock);
data->in_max[n] = r;
if (n < 4)
gl520_write_value(client, GL520_REG_IN_MAX[n],
(gl520_read_value(client, GL520_REG_IN_MAX[n])
& ~0xff00) | (r << 8));
else
gl520_write_value(client, GL520_REG_IN_MAX[n], r);
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
get_in_min, set_in_min, 0);
static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
get_in_min, set_in_min, 1);
static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
get_in_min, set_in_min, 2);
static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
get_in_min, set_in_min, 3);
static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
get_in_min, set_in_min, 4);
static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
get_in_max, set_in_max, 0);
static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
get_in_max, set_in_max, 1);
static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
get_in_max, set_in_max, 2);
static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
get_in_max, set_in_max, 3);
static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
get_in_max, set_in_max, 4);
#define DIV_FROM_REG(val) (1 << (val))
#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
#define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255))
static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
data->fan_div[n]));
}
static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
data->fan_div[n]));
}
static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
}
static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", data->fan_off);
}
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 gl520_data *data = i2c_get_clientdata(client);
int n = to_sensor_dev_attr(attr)->index;
unsigned long v = simple_strtoul(buf, NULL, 10);
u8 r;
mutex_lock(&data->update_lock);
r = FAN_TO_REG(v, data->fan_div[n]);
data->fan_min[n] = r;
if (n == 0)
gl520_write_value(client, GL520_REG_FAN_MIN,
(gl520_read_value(client, GL520_REG_FAN_MIN)
& ~0xff00) | (r << 8));
else
gl520_write_value(client, GL520_REG_FAN_MIN,
(gl520_read_value(client, GL520_REG_FAN_MIN)
& ~0xff) | r);
data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
if (data->fan_min[n] == 0)
data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
else
data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
data->beep_mask &= data->alarm_mask;
gl520_write_value(client, GL520_REG_BEEP_MASK, 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 gl520_data *data = i2c_get_clientdata(client);
int n = to_sensor_dev_attr(attr)->index;
unsigned long v = simple_strtoul(buf, NULL, 10);
u8 r;
switch (v) {
case 1: r = 0; break;
case 2: r = 1; break;
case 4: r = 2; break;
case 8: r = 3; break;
default:
dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
return -EINVAL;
}
mutex_lock(&data->update_lock);
data->fan_div[n] = r;
if (n == 0)
gl520_write_value(client, GL520_REG_FAN_DIV,
(gl520_read_value(client, GL520_REG_FAN_DIV)
& ~0xc0) | (r << 6));
else
gl520_write_value(client, GL520_REG_FAN_DIV,
(gl520_read_value(client, GL520_REG_FAN_DIV)
& ~0x30) | (r << 4));
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl520_data *data = i2c_get_clientdata(client);
u8 r = simple_strtoul(buf, NULL, 10)?1:0;
mutex_lock(&data->update_lock);
data->fan_off = r;
gl520_write_value(client, GL520_REG_FAN_OFF,
(gl520_read_value(client, GL520_REG_FAN_OFF)
& ~0x0c) | (r << 2));
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
get_fan_min, set_fan_min, 0);
static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
get_fan_min, set_fan_min, 1);
static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
get_fan_div, set_fan_div, 0);
static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
get_fan_div, set_fan_div, 1);
static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
get_fan_off, set_fan_off);
#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
#define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
}
static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
}
static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
*attr, char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
}
static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl520_data *data = i2c_get_clientdata(client);
int n = to_sensor_dev_attr(attr)->index;
long v = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_max[n] = TEMP_TO_REG(v);
gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
*attr, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl520_data *data = i2c_get_clientdata(client);
int n = to_sensor_dev_attr(attr)->index;
long v = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_max_hyst[n] = TEMP_TO_REG(v);
gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
data->temp_max_hyst[n]);
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
get_temp_max, set_temp_max, 0);
static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
get_temp_max, set_temp_max, 1);
static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
get_temp_max_hyst, set_temp_max_hyst, 0);
static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
get_temp_max_hyst, set_temp_max_hyst, 1);
static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", data->alarms);
}
static ssize_t get_beep_enable(struct device *dev, struct device_attribute
*attr, char *buf)
{
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", data->beep_enable);
}
static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", data->beep_mask);
}
static ssize_t set_beep_enable(struct device *dev, struct device_attribute
*attr, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl520_data *data = i2c_get_clientdata(client);
u8 r = simple_strtoul(buf, NULL, 10)?0:1;
mutex_lock(&data->update_lock);
data->beep_enable = !r;
gl520_write_value(client, GL520_REG_BEEP_ENABLE,
(gl520_read_value(client, GL520_REG_BEEP_ENABLE)
& ~0x04) | (r << 2));
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl520_data *data = i2c_get_clientdata(client);
u8 r = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
r &= data->alarm_mask;
data->beep_mask = r;
gl520_write_value(client, GL520_REG_BEEP_MASK, r);
mutex_unlock(&data->update_lock);
return count;
}
static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
get_beep_enable, set_beep_enable);
static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
get_beep_mask, set_beep_mask);
static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
char *buf)
{
int bit_nr = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
}
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
char *buf)
{
int bitnr = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\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 gl520_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 = gl520_read_value(client, GL520_REG_BEEP_MASK);
if (bit)
data->beep_mask |= (1 << bitnr);
else
data->beep_mask &= ~(1 << bitnr);
gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
static struct attribute *gl520_attributes[] = {
&dev_attr_cpu0_vid.attr,
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in0_min.dev_attr.attr,
&sensor_dev_attr_in0_max.dev_attr.attr,
&sensor_dev_attr_in0_alarm.dev_attr.attr,
&sensor_dev_attr_in0_beep.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_min.dev_attr.attr,
&sensor_dev_attr_in1_max.dev_attr.attr,
&sensor_dev_attr_in1_alarm.dev_attr.attr,
&sensor_dev_attr_in1_beep.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in2_min.dev_attr.attr,
&sensor_dev_attr_in2_max.dev_attr.attr,
&sensor_dev_attr_in2_alarm.dev_attr.attr,
&sensor_dev_attr_in2_beep.dev_attr.attr,
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_in3_min.dev_attr.attr,
&sensor_dev_attr_in3_max.dev_attr.attr,
&sensor_dev_attr_in3_alarm.dev_attr.attr,
&sensor_dev_attr_in3_beep.dev_attr.attr,
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_fan1_min.dev_attr.attr,
&sensor_dev_attr_fan1_div.dev_attr.attr,
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
&sensor_dev_attr_fan1_beep.dev_attr.attr,
&dev_attr_fan1_off.attr,
&sensor_dev_attr_fan2_input.dev_attr.attr,
&sensor_dev_attr_fan2_min.dev_attr.attr,
&sensor_dev_attr_fan2_div.dev_attr.attr,
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
&sensor_dev_attr_fan2_beep.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_max_hyst.dev_attr.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 gl520_group = {
.attrs = gl520_attributes,
};
static struct attribute *gl520_attributes_opt[] = {
&sensor_dev_attr_in4_input.dev_attr.attr,
&sensor_dev_attr_in4_min.dev_attr.attr,
&sensor_dev_attr_in4_max.dev_attr.attr,
&sensor_dev_attr_in4_alarm.dev_attr.attr,
&sensor_dev_attr_in4_beep.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_beep.dev_attr.attr,
NULL
};
static const struct attribute_group gl520_group_opt = {
.attrs = gl520_attributes_opt,
};
/*
* Real code
*/
/* Return 0 if detection is successful, -ENODEV otherwise */
static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA))
return -ENODEV;
/* Determine the chip type. */
if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
dev_dbg(&client->dev, "Unknown chip type, skipping\n");
return -ENODEV;
}
strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
return 0;
}
static int gl520_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct gl520_data *data;
int err;
data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL);
if (!data) {
err = -ENOMEM;
goto exit;
}
i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
/* Initialize the GL520SM chip */
gl520_init_client(client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
goto exit_free;
if (data->two_temps) {
if ((err = device_create_file(&client->dev,
&sensor_dev_attr_temp2_input.dev_attr))
|| (err = device_create_file(&client->dev,
&sensor_dev_attr_temp2_max.dev_attr))
|| (err = device_create_file(&client->dev,
&sensor_dev_attr_temp2_max_hyst.dev_attr))
|| (err = device_create_file(&client->dev,
&sensor_dev_attr_temp2_alarm.dev_attr))
|| (err = device_create_file(&client->dev,
&sensor_dev_attr_temp2_beep.dev_attr)))
goto exit_remove_files;
} else {
if ((err = device_create_file(&client->dev,
&sensor_dev_attr_in4_input.dev_attr))
|| (err = device_create_file(&client->dev,
&sensor_dev_attr_in4_min.dev_attr))
|| (err = device_create_file(&client->dev,
&sensor_dev_attr_in4_max.dev_attr))
|| (err = device_create_file(&client->dev,
&sensor_dev_attr_in4_alarm.dev_attr))
|| (err = device_create_file(&client->dev,
&sensor_dev_attr_in4_beep.dev_attr)))
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, &gl520_group);
sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
exit_free:
kfree(data);
exit:
return err;
}
/* Called when we have found a new GL520SM. */
static void gl520_init_client(struct i2c_client *client)
{
struct gl520_data *data = i2c_get_clientdata(client);
u8 oldconf, conf;
conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
data->alarm_mask = 0xff;
data->vrm = vid_which_vrm();
if (extra_sensor_type == 1)
conf &= ~0x10;
else if (extra_sensor_type == 2)
conf |= 0x10;
data->two_temps = !(conf & 0x10);
/* If IRQ# is disabled, we can safely force comparator mode */
if (!(conf & 0x20))
conf &= 0xf7;
/* Enable monitoring if needed */
conf |= 0x40;
if (conf != oldconf)
gl520_write_value(client, GL520_REG_CONF, conf);
gl520_update_device(&(client->dev));
if (data->fan_min[0] == 0)
data->alarm_mask &= ~0x20;
if (data->fan_min[1] == 0)
data->alarm_mask &= ~0x40;
data->beep_mask &= data->alarm_mask;
gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
}
static int gl520_remove(struct i2c_client *client)
{
struct gl520_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &gl520_group);
sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
kfree(data);
return 0;
}
/* Registers 0x07 to 0x0c are word-sized, others are byte-sized
GL520 uses a high-byte first convention */
static int gl520_read_value(struct i2c_client *client, u8 reg)
{
if ((reg >= 0x07) && (reg <= 0x0c))
return i2c_smbus_read_word_swapped(client, reg);
else
return i2c_smbus_read_byte_data(client, reg);
}
static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
{
if ((reg >= 0x07) && (reg <= 0x0c))
return i2c_smbus_write_word_swapped(client, reg, value);
else
return i2c_smbus_write_byte_data(client, reg, value);
}
static struct gl520_data *gl520_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl520_data *data = i2c_get_clientdata(client);
int val, i;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
dev_dbg(&client->dev, "Starting gl520sm update\n");
data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
for (i = 0; i < 4; i++) {
data->in_input[i] = gl520_read_value(client,
GL520_REG_IN_INPUT[i]);
val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
data->in_min[i] = val & 0xff;
data->in_max[i] = (val >> 8) & 0xff;
}
val = gl520_read_value(client, GL520_REG_FAN_INPUT);
data->fan_input[0] = (val >> 8) & 0xff;
data->fan_input[1] = val & 0xff;
val = gl520_read_value(client, GL520_REG_FAN_MIN);
data->fan_min[0] = (val >> 8) & 0xff;
data->fan_min[1] = val & 0xff;
data->temp_input[0] = gl520_read_value(client,
GL520_REG_TEMP_INPUT[0]);
data->temp_max[0] = gl520_read_value(client,
GL520_REG_TEMP_MAX[0]);
data->temp_max_hyst[0] = gl520_read_value(client,
GL520_REG_TEMP_MAX_HYST[0]);
val = gl520_read_value(client, GL520_REG_FAN_DIV);
data->fan_div[0] = (val >> 6) & 0x03;
data->fan_div[1] = (val >> 4) & 0x03;
data->fan_off = (val >> 2) & 0x01;
data->alarms &= data->alarm_mask;
val = gl520_read_value(client, GL520_REG_CONF);
data->beep_enable = !((val >> 2) & 1);
/* Temp1 and Vin4 are the same input */
if (data->two_temps) {
data->temp_input[1] = gl520_read_value(client,
GL520_REG_TEMP_INPUT[1]);
data->temp_max[1] = gl520_read_value(client,
GL520_REG_TEMP_MAX[1]);
data->temp_max_hyst[1] = gl520_read_value(client,
GL520_REG_TEMP_MAX_HYST[1]);
} else {
data->in_input[4] = gl520_read_value(client,
GL520_REG_IN_INPUT[4]);
data->in_min[4] = gl520_read_value(client,
GL520_REG_IN_MIN[4]);
data->in_max[4] = gl520_read_value(client,
GL520_REG_IN_MAX[4]);
}
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
static int __init sensors_gl520sm_init(void)
{
return i2c_add_driver(&gl520_driver);
}
static void __exit sensors_gl520sm_exit(void)
{
i2c_del_driver(&gl520_driver);
}
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
"Kyösti Mälkki <kmalkki@cc.hut.fi>, "
"Maarten Deprez <maartendeprez@users.sourceforge.net>");
MODULE_DESCRIPTION("GL520SM driver");
MODULE_LICENSE("GPL");
module_init(sensors_gl520sm_init);
module_exit(sensors_gl520sm_exit);
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