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|
/*
* f75375s.c - driver for the Fintek F75375/SP and F75373
* hardware monitoring features
* Copyright (C) 2006-2007 Riku Voipio
*
* Datasheets available at:
*
* f75375:
* http://www.fintek.com.tw/files/productfiles/F75375_V026P.pdf
*
* f75373:
* http://www.fintek.com.tw/files/productfiles/F75373_V025P.pdf
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; 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/jiffies.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/f75375s.h>
#include <linux/slab.h>
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
enum chips { f75373, f75375 };
/* Fintek F75375 registers */
#define F75375_REG_CONFIG0 0x0
#define F75375_REG_CONFIG1 0x1
#define F75375_REG_CONFIG2 0x2
#define F75375_REG_CONFIG3 0x3
#define F75375_REG_ADDR 0x4
#define F75375_REG_INTR 0x31
#define F75375_CHIP_ID 0x5A
#define F75375_REG_VERSION 0x5C
#define F75375_REG_VENDOR 0x5D
#define F75375_REG_FAN_TIMER 0x60
#define F75375_REG_VOLT(nr) (0x10 + (nr))
#define F75375_REG_VOLT_HIGH(nr) (0x20 + (nr) * 2)
#define F75375_REG_VOLT_LOW(nr) (0x21 + (nr) * 2)
#define F75375_REG_TEMP(nr) (0x14 + (nr))
#define F75375_REG_TEMP_HIGH(nr) (0x28 + (nr) * 2)
#define F75375_REG_TEMP_HYST(nr) (0x29 + (nr) * 2)
#define F75375_REG_FAN(nr) (0x16 + (nr) * 2)
#define F75375_REG_FAN_MIN(nr) (0x2C + (nr) * 2)
#define F75375_REG_FAN_FULL(nr) (0x70 + (nr) * 0x10)
#define F75375_REG_FAN_PWM_DUTY(nr) (0x76 + (nr) * 0x10)
#define F75375_REG_FAN_PWM_CLOCK(nr) (0x7D + (nr) * 0x10)
#define F75375_REG_FAN_EXP(nr) (0x74 + (nr) * 0x10)
#define F75375_REG_FAN_B_TEMP(nr, step) ((0xA0 + (nr) * 0x10) + (step))
#define F75375_REG_FAN_B_SPEED(nr, step) \
((0xA5 + (nr) * 0x10) + (step) * 2)
#define F75375_REG_PWM1_RAISE_DUTY 0x69
#define F75375_REG_PWM2_RAISE_DUTY 0x6A
#define F75375_REG_PWM1_DROP_DUTY 0x6B
#define F75375_REG_PWM2_DROP_DUTY 0x6C
#define FAN_CTRL_LINEAR(nr) (4 + nr)
#define FAN_CTRL_MODE(nr) (4 + ((nr) * 2))
/*
* Data structures and manipulation thereof
*/
struct f75375_data {
unsigned short addr;
struct device *hwmon_dev;
const char *name;
int kind;
struct mutex update_lock; /* protect register access */
char valid;
unsigned long last_updated; /* In jiffies */
unsigned long last_limits; /* In jiffies */
/* Register values */
u8 in[4];
u8 in_max[4];
u8 in_min[4];
u16 fan[2];
u16 fan_min[2];
u16 fan_full[2];
u16 fan_exp[2];
u8 fan_timer;
u8 pwm[2];
u8 pwm_mode[2];
u8 pwm_enable[2];
s8 temp[2];
s8 temp_high[2];
s8 temp_max_hyst[2];
};
static int f75375_detect(struct i2c_client *client,
struct i2c_board_info *info);
static int f75375_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int f75375_remove(struct i2c_client *client);
static const struct i2c_device_id f75375_id[] = {
{ "f75373", f75373 },
{ "f75375", f75375 },
{ }
};
MODULE_DEVICE_TABLE(i2c, f75375_id);
static struct i2c_driver f75375_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "f75375",
},
.probe = f75375_probe,
.remove = f75375_remove,
.id_table = f75375_id,
.detect = f75375_detect,
.address_list = normal_i2c,
};
static inline int f75375_read8(struct i2c_client *client, u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
/* in most cases, should be called while holding update_lock */
static inline u16 f75375_read16(struct i2c_client *client, u8 reg)
{
return ((i2c_smbus_read_byte_data(client, reg) << 8)
| i2c_smbus_read_byte_data(client, reg + 1));
}
static inline void f75375_write8(struct i2c_client *client, u8 reg,
u8 value)
{
i2c_smbus_write_byte_data(client, reg, value);
}
static inline void f75375_write16(struct i2c_client *client, u8 reg,
u16 value)
{
int err = i2c_smbus_write_byte_data(client, reg, (value << 8));
if (err)
return;
i2c_smbus_write_byte_data(client, reg + 1, (value & 0xFF));
}
static struct f75375_data *f75375_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct f75375_data *data = i2c_get_clientdata(client);
int nr;
mutex_lock(&data->update_lock);
/* Limit registers cache is refreshed after 60 seconds */
if (time_after(jiffies, data->last_limits + 60 * HZ)
|| !data->valid) {
for (nr = 0; nr < 2; nr++) {
data->temp_high[nr] =
f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
data->temp_max_hyst[nr] =
f75375_read8(client, F75375_REG_TEMP_HYST(nr));
data->fan_full[nr] =
f75375_read16(client, F75375_REG_FAN_FULL(nr));
data->fan_min[nr] =
f75375_read16(client, F75375_REG_FAN_MIN(nr));
data->fan_exp[nr] =
f75375_read16(client, F75375_REG_FAN_EXP(nr));
data->pwm[nr] = f75375_read8(client,
F75375_REG_FAN_PWM_DUTY(nr));
}
for (nr = 0; nr < 4; nr++) {
data->in_max[nr] =
f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
data->in_min[nr] =
f75375_read8(client, F75375_REG_VOLT_LOW(nr));
}
data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
data->last_limits = jiffies;
}
/* Measurement registers cache is refreshed after 2 second */
if (time_after(jiffies, data->last_updated + 2 * HZ)
|| !data->valid) {
for (nr = 0; nr < 2; nr++) {
data->temp[nr] =
f75375_read8(client, F75375_REG_TEMP(nr));
data->fan[nr] =
f75375_read16(client, F75375_REG_FAN(nr));
}
for (nr = 0; nr < 4; nr++)
data->in[nr] =
f75375_read8(client, F75375_REG_VOLT(nr));
data->last_updated = jiffies;
data-&
|