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497888cf69
linux/drivers/hwmon/gl520sm.c
Phil Carmody 497888cf69 treewide: fix potentially dangerous trailing ';' in #defined values/expressions 
All these are instances of
  #define NAME value;
or
  #define NAME(params_opt) value;

These of course fail to build when used in contexts like
  if(foo $OP NAME)
  while(bar $OP NAME)
and may silently generate the wrong code in contexts such as
  foo = NAME + 1;    /* foo = value; + 1; */
  bar = NAME - 1;    /* bar = value; - 1; */
  baz = NAME & quux; /* baz = value; & quux; */

Reported on comp.lang.c,
Message-ID: <ab0d55fe-25e5-482b-811e-c475aa6065c3@c29g2000yqd.googlegroups.com>
Initial analysis of the dangers provided by Keith Thompson in that thread.

There are many more instances of more complicated macros having unnecessary
trailing semicolons, but this pile seems to be all of the cases of simple
values suffering from the problem. (Thus things that are likely to be found
in one of the contexts above, more complicated ones aren't.)

Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-07-21 14:10:00 +02:00

933 lines
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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 swab16(i2c_smbus_read_word_data(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_data(client, reg, swab16(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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