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linux/drivers/hwmon/f71882fg.c
Jean Delvare 67b671bceb hwmon: Let the user override the detected Super-I/O device ID 
While it is possible to force SMBus-based hardware monitoring chip
drivers to drive a not officially supported device, we do not have this
possibility for Super-I/O-based drivers. That's unfortunate because
sometimes newer chips are fully compatible and just forcing the driver
to load would work. Instead of that we have to tell the users to
recompile the kernel driver, which isn't an easy task for everyone.

So, I propose that we add a module parameter to all Super-I/O based
hardware monitoring drivers, letting advanced users force the driver
to load on their machine. The user has to provide the device ID of a
supposedly compatible device. This requires looking at the source code or
a datasheet, so I am confident that users can't randomly force a driver
without knowing what they are doing. Thus this should be relatively safe.

As you can see from the code, the implementation is pretty simple and
unintrusive.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
2008-02-07 20:39:42 -05:00

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/***************************************************************************
* Copyright (C) 2006 by Hans Edgington <hans@edgington.nl> *
* Copyright (C) 2007 by Hans de Goede <j.w.r.degoede@hhs.nl> *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <asm/io.h>
#define DRVNAME "f71882fg"
#define SIO_F71882FG_LD_HWM 0x04 /* Hardware monitor logical device*/
#define SIO_UNLOCK_KEY 0x87 /* Key to enable Super-I/O */
#define SIO_LOCK_KEY 0xAA /* Key to diasble Super-I/O */
#define SIO_REG_LDSEL 0x07 /* Logical device select */
#define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
#define SIO_REG_DEVREV 0x22 /* Device revision */
#define SIO_REG_MANID 0x23 /* Fintek ID (2 bytes) */
#define SIO_REG_ENABLE 0x30 /* Logical device enable */
#define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */
#define SIO_FINTEK_ID 0x1934 /* Manufacturers ID */
#define SIO_F71882_ID 0x0541 /* Chipset ID */
#define REGION_LENGTH 8
#define ADDR_REG_OFFSET 5
#define DATA_REG_OFFSET 6
#define F71882FG_REG_PECI 0x0A
#define F71882FG_REG_IN_STATUS 0x12
#define F71882FG_REG_IN_BEEP 0x13
#define F71882FG_REG_IN(nr) (0x20 + (nr))
#define F71882FG_REG_IN1_HIGH 0x32
#define F71882FG_REG_FAN(nr) (0xA0 + (16 * (nr)))
#define F71882FG_REG_FAN_STATUS 0x92
#define F71882FG_REG_FAN_BEEP 0x93
#define F71882FG_REG_TEMP(nr) (0x72 + 2 * (nr))
#define F71882FG_REG_TEMP_OVT(nr) (0x82 + 2 * (nr))
#define F71882FG_REG_TEMP_HIGH(nr) (0x83 + 2 * (nr))
#define F71882FG_REG_TEMP_STATUS 0x62
#define F71882FG_REG_TEMP_BEEP 0x63
#define F71882FG_REG_TEMP_HYST1 0x6C
#define F71882FG_REG_TEMP_HYST23 0x6D
#define F71882FG_REG_TEMP_TYPE 0x6B
#define F71882FG_REG_TEMP_DIODE_OPEN 0x6F
#define F71882FG_REG_START 0x01
#define FAN_MIN_DETECT 366 /* Lowest detectable fanspeed */
static unsigned short force_id;
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");
static struct platform_device *f71882fg_pdev = NULL;
/* Super-I/O Function prototypes */
static inline int superio_inb(int base, int reg);
static inline int superio_inw(int base, int reg);
static inline void superio_enter(int base);
static inline void superio_select(int base, int ld);
static inline void superio_exit(int base);
static inline u16 fan_from_reg ( u16 reg );
struct f71882fg_data {
unsigned short addr;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
unsigned long last_limits; /* In jiffies */
/* Register Values */
u8 in[9];
u8 in1_max;
u8 in_status;
u8 in_beep;
u16 fan[4];
u8 fan_status;
u8 fan_beep;
u8 temp[3];
u8 temp_ovt[3];
u8 temp_high[3];
u8 temp_hyst[3];
u8 temp_type[3];
u8 temp_status;
u8 temp_beep;
u8 temp_diode_open;
};
static u8 f71882fg_read8(struct f71882fg_data *data, u8 reg);
static u16 f71882fg_read16(struct f71882fg_data *data, u8 reg);
static void f71882fg_write8(struct f71882fg_data *data, u8 reg, u8 val);
/* Sysfs in*/
static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
char *buf);
static ssize_t show_in_max(struct device *dev, struct device_attribute
*devattr, char *buf);
static ssize_t store_in_max(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count);
static ssize_t show_in_beep(struct device *dev, struct device_attribute
*devattr, char *buf);
static ssize_t store_in_beep(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count);
static ssize_t show_in_alarm(struct device *dev, struct device_attribute
*devattr, char *buf);
/* Sysfs Fan */
static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
char *buf);
static ssize_t show_fan_beep(struct device *dev, struct device_attribute
*devattr, char *buf);
static ssize_t store_fan_beep(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count);
static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
*devattr, char *buf);
/* Sysfs Temp */
static ssize_t show_temp(struct device *dev, struct device_attribute
*devattr, char *buf);
static ssize_t show_temp_max(struct device *dev, struct device_attribute
*devattr, char *buf);
static ssize_t store_temp_max(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count);
static ssize_t show_temp_max_hyst(struct device *dev, struct device_attribute
*devattr, char *buf);
static ssize_t store_temp_max_hyst(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count);
static ssize_t show_temp_crit(struct device *dev, struct device_attribute
*devattr, char *buf);
static ssize_t store_temp_crit(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count);
static ssize_t show_temp_crit_hyst(struct device *dev, struct device_attribute
*devattr, char *buf);
static ssize_t show_temp_type(struct device *dev, struct device_attribute
*devattr, char *buf);
static ssize_t show_temp_beep(struct device *dev, struct device_attribute
*devattr, char *buf);
static ssize_t store_temp_beep(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count);
static ssize_t show_temp_alarm(struct device *dev, struct device_attribute
*devattr, char *buf);
static ssize_t show_temp_fault(struct device *dev, struct device_attribute
*devattr, char *buf);
/* Sysfs misc */
static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
char *buf);
static int __devinit f71882fg_probe(struct platform_device * pdev);
static int __devexit f71882fg_remove(struct platform_device *pdev);
static int __init f71882fg_init(void);
static int __init f71882fg_find(int sioaddr, unsigned short *address);
static int __init f71882fg_device_add(unsigned short address);
static void __exit f71882fg_exit(void);
static struct platform_driver f71882fg_driver = {
.driver = {
.owner = THIS_MODULE,
.name = DRVNAME,
},
.probe = f71882fg_probe,
.remove = __devexit_p(f71882fg_remove),
};
static struct device_attribute f71882fg_dev_attr[] =
{
__ATTR( name, S_IRUGO, show_name, NULL ),
};
static struct sensor_device_attribute f71882fg_in_temp_attr[] =
{
SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
SENSOR_ATTR(in1_max, S_IRUGO|S_IWUSR, show_in_max, store_in_max, 1),
SENSOR_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_in_beep, store_in_beep, 1),
SENSOR_ATTR(in1_alarm, S_IRUGO, show_in_alarm, NULL, 1),
SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
SENSOR_ATTR(in3_input, S_IRUGO, show_in, NULL, 3),
SENSOR_ATTR(in4_input, S_IRUGO, show_in, NULL, 4),
SENSOR_ATTR(in5_input, S_IRUGO, show_in, NULL, 5),
SENSOR_ATTR(in6_input, S_IRUGO, show_in, NULL, 6),
SENSOR_ATTR(in7_input, S_IRUGO, show_in, NULL, 7),
SENSOR_ATTR(in8_input, S_IRUGO, show_in, NULL, 8),
SENSOR_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0),
SENSOR_ATTR(temp1_max, S_IRUGO|S_IWUSR, show_temp_max,
store_temp_max, 0),
SENSOR_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR, show_temp_max_hyst,
store_temp_max_hyst, 0),
SENSOR_ATTR(temp1_crit, S_IRUGO|S_IWUSR, show_temp_crit,
store_temp_crit, 0),
SENSOR_ATTR(temp1_crit_hyst, S_IRUGO, show_temp_crit_hyst, NULL, 0),
SENSOR_ATTR(temp1_type, S_IRUGO, show_temp_type, NULL, 0),
SENSOR_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_temp_beep,
store_temp_beep, 0),
SENSOR_ATTR(temp1_alarm, S_IRUGO, show_temp_alarm, NULL, 0),
SENSOR_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0),
SENSOR_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1),
SENSOR_ATTR(temp2_max, S_IRUGO|S_IWUSR, show_temp_max,
store_temp_max, 1),
SENSOR_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR, show_temp_max_hyst,
store_temp_max_hyst, 1),
SENSOR_ATTR(temp2_crit, S_IRUGO|S_IWUSR, show_temp_crit,
store_temp_crit, 1),
SENSOR_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst, NULL, 1),
SENSOR_ATTR(temp2_type, S_IRUGO, show_temp_type, NULL, 1),
SENSOR_ATTR(temp2_beep, S_IRUGO|S_IWUSR, show_temp_beep,
store_temp_beep, 1),
SENSOR_ATTR(temp2_alarm, S_IRUGO, show_temp_alarm, NULL, 1),
SENSOR_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1),
SENSOR_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2),
SENSOR_ATTR(temp3_max, S_IRUGO|S_IWUSR, show_temp_max,
store_temp_max, 2),
SENSOR_ATTR(temp3_max_hyst, S_IRUGO|S_IWUSR, show_temp_max_hyst,
store_temp_max_hyst, 2),
SENSOR_ATTR(temp3_crit, S_IRUGO|S_IWUSR, show_temp_crit,
store_temp_crit, 2),
SENSOR_ATTR(temp3_crit_hyst, S_IRUGO, show_temp_crit_hyst, NULL, 2),
SENSOR_ATTR(temp3_type, S_IRUGO, show_temp_type, NULL, 2),
SENSOR_ATTR(temp3_beep, S_IRUGO|S_IWUSR, show_temp_beep,
store_temp_beep, 2),
SENSOR_ATTR(temp3_alarm, S_IRUGO, show_temp_alarm, NULL, 2),
SENSOR_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2)
};
static struct sensor_device_attribute f71882fg_fan_attr[] =
{
SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
SENSOR_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_fan_beep,
store_fan_beep, 0),
SENSOR_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL, 0),
SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
SENSOR_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_fan_beep,
store_fan_beep, 1),
SENSOR_ATTR(fan2_alarm, S_IRUGO, show_fan_alarm, NULL, 1),
SENSOR_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2),
SENSOR_ATTR(fan3_beep, S_IRUGO|S_IWUSR, show_fan_beep,
store_fan_beep, 2),
SENSOR_ATTR(fan3_alarm, S_IRUGO, show_fan_alarm, NULL, 2),
SENSOR_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3),
SENSOR_ATTR(fan4_beep, S_IRUGO|S_IWUSR, show_fan_beep,
store_fan_beep, 3),
SENSOR_ATTR(fan4_alarm, S_IRUGO, show_fan_alarm, NULL, 3)
};
/* Super I/O functions */
static inline int superio_inb(int base, int reg)
{
outb(reg, base);
return inb(base + 1);
}
static int superio_inw(int base, int reg)
{
int val;
outb(reg++, base);
val = inb(base + 1) << 8;
outb(reg, base);
val |= inb(base + 1);
return val;
}
static inline void superio_enter(int base)
{
/* according to the datasheet the key must be send twice! */
outb( SIO_UNLOCK_KEY, base);
outb( SIO_UNLOCK_KEY, base);
}
static inline void superio_select( int base, int ld)
{
outb(SIO_REG_LDSEL, base);
outb(ld, base + 1);
}
static inline void superio_exit(int base)
{
outb(SIO_LOCK_KEY, base);
}
static inline u16 fan_from_reg(u16 reg)
{
return reg ? (1500000 / reg) : 0;
}
static u8 f71882fg_read8(struct f71882fg_data *data, u8 reg)
{
u8 val;
outb(reg, data->addr + ADDR_REG_OFFSET);
val = inb(data->addr + DATA_REG_OFFSET);
return val;
}
static u16 f71882fg_read16(struct f71882fg_data *data, u8 reg)
{
u16 val;
outb(reg++, data->addr + ADDR_REG_OFFSET);
val = inb(data->addr + DATA_REG_OFFSET) << 8;
outb(reg, data->addr + ADDR_REG_OFFSET);
val |= inb(data->addr + DATA_REG_OFFSET);
return val;
}
static void f71882fg_write8(struct f71882fg_data *data, u8 reg, u8 val)
{
outb(reg, data->addr + ADDR_REG_OFFSET);
outb(val, data->addr + DATA_REG_OFFSET);
}
static struct f71882fg_data *f71882fg_update_device(struct device * dev)
{
struct f71882fg_data *data = dev_get_drvdata(dev);
int nr, reg, reg2;
mutex_lock(&data->update_lock);
/* Update once every 60 seconds */
if ( time_after(jiffies, data->last_limits + 60 * HZ ) ||
!data->valid) {
data->in1_max = f71882fg_read8(data, F71882FG_REG_IN1_HIGH);
data->in_beep = f71882fg_read8(data, F71882FG_REG_IN_BEEP);
/* Get High & boundary temps*/
for (nr = 0; nr < 3; nr++) {
data->temp_ovt[nr] = f71882fg_read8(data,
F71882FG_REG_TEMP_OVT(nr));
data->temp_high[nr] = f71882fg_read8(data,
F71882FG_REG_TEMP_HIGH(nr));
}
/* Have to hardcode hyst*/
data->temp_hyst[0] = f71882fg_read8(data,
F71882FG_REG_TEMP_HYST1) >> 4;
/* Hyst temps 2 & 3 stored in same register */
reg = f71882fg_read8(data, F71882FG_REG_TEMP_HYST23);
data->temp_hyst[1] = reg & 0x0F;
data->temp_hyst[2] = reg >> 4;
/* Have to hardcode type, because temp1 is special */
reg = f71882fg_read8(data, F71882FG_REG_TEMP_TYPE);
reg2 = f71882fg_read8(data, F71882FG_REG_PECI);
if ((reg2 & 0x03) == 0x01)
data->temp_type[0] = 6 /* PECI */;
else if ((reg2 & 0x03) == 0x02)
data->temp_type[0] = 5 /* AMDSI */;
else
data->temp_type[0] = (reg & 0x02) ? 2 : 4;
data->temp_type[1] = (reg & 0x04) ? 2 : 4;
data->temp_type[2] = (reg & 0x08) ? 2 : 4;
data->temp_beep = f71882fg_read8(data, F71882FG_REG_TEMP_BEEP);
data->fan_beep = f71882fg_read8(data, F71882FG_REG_FAN_BEEP);
data->last_limits = jiffies;
}
/* Update every second */
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
data->temp_status = f71882fg_read8(data,
F71882FG_REG_TEMP_STATUS);
data->temp_diode_open = f71882fg_read8(data,
F71882FG_REG_TEMP_DIODE_OPEN);
for (nr = 0; nr < 3; nr++)
data->temp[nr] = f71882fg_read8(data,
F71882FG_REG_TEMP(nr));
data->fan_status = f71882fg_read8(data,
F71882FG_REG_FAN_STATUS);
for (nr = 0; nr < 4; nr++)
data->fan[nr] = f71882fg_read16(data,
F71882FG_REG_FAN(nr));
data->in_status = f71882fg_read8(data,
F71882FG_REG_IN_STATUS);
for (nr = 0; nr < 9; nr++)
data->in[nr] = f71882fg_read8(data,
F71882FG_REG_IN(nr));
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
/* Sysfs Interface */
static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
int speed = fan_from_reg(data->fan[nr]);
if (speed == FAN_MIN_DETECT)
speed = 0;
return sprintf(buf, "%d\n", speed);
}
static ssize_t show_fan_beep(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
if (data->fan_beep & (1 << nr))
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static ssize_t store_fan_beep(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count)
{
struct f71882fg_data *data = dev_get_drvdata(dev);
int nr = to_sensor_dev_attr(devattr)->index;
int val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
if (val)
data->fan_beep |= 1 << nr;
else
data->fan_beep &= ~(1 << nr);
f71882fg_write8(data, F71882FG_REG_FAN_BEEP, data->fan_beep);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
if (data->fan_status & (1 << nr))
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
return sprintf(buf, "%d\n", data->in[nr] * 8);
}
static ssize_t show_in_max(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
return sprintf(buf, "%d\n", data->in1_max * 8);
}
static ssize_t store_in_max(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count)
{
struct f71882fg_data *data = dev_get_drvdata(dev);
int val = simple_strtoul(buf, NULL, 10) / 8;
if (val > 255)
val = 255;
mutex_lock(&data->update_lock);
f71882fg_write8(data, F71882FG_REG_IN1_HIGH, val);
data->in1_max = val;
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_in_beep(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
if (data->in_beep & (1 << nr))
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static ssize_t store_in_beep(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count)
{
struct f71882fg_data *data = dev_get_drvdata(dev);
int nr = to_sensor_dev_attr(devattr)->index;
int val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
if (val)
data->in_beep |= 1 << nr;
else
data->in_beep &= ~(1 << nr);
f71882fg_write8(data, F71882FG_REG_IN_BEEP, data->in_beep);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_in_alarm(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
if (data->in_status & (1 << nr))
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
return sprintf(buf, "%d\n", data->temp[nr] * 1000);
}
static ssize_t show_temp_max(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
return sprintf(buf, "%d\n", data->temp_high[nr] * 1000);
}
static ssize_t store_temp_max(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count)
{
struct f71882fg_data *data = dev_get_drvdata(dev);
int nr = to_sensor_dev_attr(devattr)->index;
int val = simple_strtoul(buf, NULL, 10) / 1000;
if (val > 255)
val = 255;
mutex_lock(&data->update_lock);
f71882fg_write8(data, F71882FG_REG_TEMP_HIGH(nr), val);
data->temp_high[nr] = val;
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_temp_max_hyst(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
return sprintf(buf, "%d\n",
(data->temp_high[nr] - data->temp_hyst[nr]) * 1000);
}
static ssize_t store_temp_max_hyst(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count)
{
struct f71882fg_data *data = dev_get_drvdata(dev);
int nr = to_sensor_dev_attr(devattr)->index;
int val = simple_strtoul(buf, NULL, 10) / 1000;
ssize_t ret = count;
mutex_lock(&data->update_lock);
/* convert abs to relative and check */
val = data->temp_high[nr] - val;
if (val < 0 || val > 15) {
ret = -EINVAL;
goto store_temp_max_hyst_exit;
}
data->temp_hyst[nr] = val;
/* convert value to register contents */
switch (nr) {
case 0:
val = val << 4;
break;
case 1:
val = val | (data->temp_hyst[2] << 4);
break;
case 2:
val = data->temp_hyst[1] | (val << 4);
break;
}
f71882fg_write8(data, nr ? F71882FG_REG_TEMP_HYST23 :
F71882FG_REG_TEMP_HYST1, val);
store_temp_max_hyst_exit:
mutex_unlock(&data->update_lock);
return ret;
}
static ssize_t show_temp_crit(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
return sprintf(buf, "%d\n", data->temp_ovt[nr] * 1000);
}
static ssize_t store_temp_crit(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count)
{
struct f71882fg_data *data = dev_get_drvdata(dev);
int nr = to_sensor_dev_attr(devattr)->index;
int val = simple_strtoul(buf, NULL, 10) / 1000;
if (val > 255)
val = 255;
mutex_lock(&data->update_lock);
f71882fg_write8(data, F71882FG_REG_TEMP_OVT(nr), val);
data->temp_ovt[nr] = val;
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_temp_crit_hyst(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
return sprintf(buf, "%d\n",
(data->temp_ovt[nr] - data->temp_hyst[nr]) * 1000);
}
static ssize_t show_temp_type(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
return sprintf(buf, "%d\n", data->temp_type[nr]);
}
static ssize_t show_temp_beep(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
if (data->temp_beep & (1 << (nr + 1)))
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static ssize_t store_temp_beep(struct device *dev, struct device_attribute
*devattr, const char *buf, size_t count)
{
struct f71882fg_data *data = dev_get_drvdata(dev);
int nr = to_sensor_dev_attr(devattr)->index;
int val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
if (val)
data->temp_beep |= 1 << (nr + 1);
else
data->temp_beep &= ~(1 << (nr + 1));
f71882fg_write8(data, F71882FG_REG_TEMP_BEEP, data->temp_beep);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_temp_alarm(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
if (data->temp_status & (1 << (nr + 1)))
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static ssize_t show_temp_fault(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct f71882fg_data *data = f71882fg_update_device(dev);
int nr = to_sensor_dev_attr(devattr)->index;
if (data->temp_diode_open & (1 << (nr + 1)))
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
char *buf)
{
return sprintf(buf, DRVNAME "\n");
}
static int __devinit f71882fg_probe(struct platform_device * pdev)
{
struct f71882fg_data *data;
int err, i;
u8 start_reg;
if (!(data = kzalloc(sizeof(struct f71882fg_data), GFP_KERNEL)))
return -ENOMEM;
data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
mutex_init(&data->update_lock);
platform_set_drvdata(pdev, data);
/* Register sysfs interface files */
for (i = 0; i < ARRAY_SIZE(f71882fg_dev_attr); i++) {
err = device_create_file(&pdev->dev, &f71882fg_dev_attr[i]);
if (err)
goto exit_unregister_sysfs;
}
start_reg = f71882fg_read8(data, F71882FG_REG_START);
if (start_reg & 0x01) {
for (i = 0; i < ARRAY_SIZE(f71882fg_in_temp_attr); i++) {
err = device_create_file(&pdev->dev,
&f71882fg_in_temp_attr[i].dev_attr);
if (err)
goto exit_unregister_sysfs;
}
}
if (start_reg & 0x02) {
for (i = 0; i < ARRAY_SIZE(f71882fg_fan_attr); i++) {
err = device_create_file(&pdev->dev,
&f71882fg_fan_attr[i].dev_attr);
if (err)
goto exit_unregister_sysfs;
}
}
data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_unregister_sysfs;
}
return 0;
exit_unregister_sysfs:
for (i = 0; i < ARRAY_SIZE(f71882fg_dev_attr); i++)
device_remove_file(&pdev->dev, &f71882fg_dev_attr[i]);
for (i = 0; i < ARRAY_SIZE(f71882fg_in_temp_attr); i++)
device_remove_file(&pdev->dev,
&f71882fg_in_temp_attr[i].dev_attr);
for (i = 0; i < ARRAY_SIZE(f71882fg_fan_attr); i++)
device_remove_file(&pdev->dev, &f71882fg_fan_attr[i].dev_attr);
kfree(data);
return err;
}
static int __devexit f71882fg_remove(struct platform_device *pdev)
{
int i;
struct f71882fg_data *data = platform_get_drvdata(pdev);
platform_set_drvdata(pdev, NULL);
hwmon_device_unregister(data->hwmon_dev);
for (i = 0; i < ARRAY_SIZE(f71882fg_dev_attr); i++)
device_remove_file(&pdev->dev, &f71882fg_dev_attr[i]);
for (i = 0; i < ARRAY_SIZE(f71882fg_in_temp_attr); i++)
device_remove_file(&pdev->dev,
&f71882fg_in_temp_attr[i].dev_attr);
for (i = 0; i < ARRAY_SIZE(f71882fg_fan_attr); i++)
device_remove_file(&pdev->dev, &f71882fg_fan_attr[i].dev_attr);
kfree(data);
return 0;
}
static int __init f71882fg_find(int sioaddr, unsigned short *address)
{
int err = -ENODEV;
u16 devid;
u8 start_reg;
struct f71882fg_data data;
superio_enter(sioaddr);
devid = superio_inw(sioaddr, SIO_REG_MANID);
if (devid != SIO_FINTEK_ID) {
printk(KERN_INFO DRVNAME ": Not a Fintek device\n");
goto exit;
}
devid = force_id ? force_id : superio_inw(sioaddr, SIO_REG_DEVID);
if (devid != SIO_F71882_ID) {
printk(KERN_INFO DRVNAME ": Unsupported Fintek device\n");
goto exit;
}
superio_select(sioaddr, SIO_F71882FG_LD_HWM);
if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
printk(KERN_WARNING DRVNAME ": Device not activated\n");
goto exit;
}
*address = superio_inw(sioaddr, SIO_REG_ADDR);
if (*address == 0)
{
printk(KERN_WARNING DRVNAME ": Base address not set\n");
goto exit;
}
*address &= ~(REGION_LENGTH - 1); /* Ignore 3 LSB */
data.addr = *address;
start_reg = f71882fg_read8(&data, F71882FG_REG_START);
if (!(start_reg & 0x03)) {
printk(KERN_WARNING DRVNAME
": Hardware monitoring not activated\n");
goto exit;
}
err = 0;
printk(KERN_INFO DRVNAME ": Found F71882FG chip at %#x, revision %d\n",
(unsigned int)*address,
(int)superio_inb(sioaddr, SIO_REG_DEVREV));
exit:
superio_exit(sioaddr);
return err;
}
static int __init f71882fg_device_add(unsigned short address)
{
struct resource res = {
.start = address,
.end = address + REGION_LENGTH - 1,
.flags = IORESOURCE_IO,
};
int err;
f71882fg_pdev = platform_device_alloc(DRVNAME, address);
if (!f71882fg_pdev)
return -ENOMEM;
res.name = f71882fg_pdev->name;
err = platform_device_add_resources(f71882fg_pdev, &res, 1);
if (err) {
printk(KERN_ERR DRVNAME ": Device resource addition failed\n");
goto exit_device_put;
}
err = platform_device_add(f71882fg_pdev);
if (err) {
printk(KERN_ERR DRVNAME ": Device addition failed\n");
goto exit_device_put;
}
return 0;
exit_device_put:
platform_device_put(f71882fg_pdev);
return err;
}
static int __init f71882fg_init(void)
{
int err = -ENODEV;
unsigned short address;
if (f71882fg_find(0x2e, &address) && f71882fg_find(0x4e, &address))
goto exit;
if ((err = platform_driver_register(&f71882fg_driver)))
goto exit;
if ((err = f71882fg_device_add(address)))
goto exit_driver;
return 0;
exit_driver:
platform_driver_unregister(&f71882fg_driver);
exit:
return err;
}
static void __exit f71882fg_exit(void)
{
platform_device_unregister(f71882fg_pdev);
platform_driver_unregister(&f71882fg_driver);
}
MODULE_DESCRIPTION("F71882FG Hardware Monitoring Driver");
MODULE_AUTHOR("Hans Edgington (hans@edgington.nl)");
MODULE_LICENSE("GPL");
module_init(f71882fg_init);
module_exit(f71882fg_exit);
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