linux/drivers/hwmon/lm63.c
Jean Delvare 5b0620df9c hwmon: (lm63) Drop redundant safety on cache lifetime
time_after (as opposed to time_after_equal) already ensures that the
cache lifetime is at least as much as requested. There is no point in
manually adding another jiffy to that value, and this can confuse the
reader into wrong interpretation.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Imre Deak <imre.deak@intel.com>
2013-07-08 14:18:24 +02:00

1208 lines
37 KiB
C

/*
* lm63.c - driver for the National Semiconductor LM63 temperature sensor
* with integrated fan control
* Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org>
* Based on the lm90 driver.
*
* The LM63 is a sensor chip made by National Semiconductor. It measures
* two temperatures (its own and one external one) and the speed of one
* fan, those speed it can additionally control. Complete datasheet can be
* obtained from National's website at:
* http://www.national.com/pf/LM/LM63.html
*
* The LM63 is basically an LM86 with fan speed monitoring and control
* capabilities added. It misses some of the LM86 features though:
* - No low limit for local temperature.
* - No critical limit for local temperature.
* - Critical limit for remote temperature can be changed only once. We
* will consider that the critical limit is read-only.
*
* The datasheet isn't very clear about what the tachometer reading is.
* I had a explanation from National Semiconductor though. The two lower
* bits of the read value have to be masked out. The value is still 16 bit
* in width.
*
* 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-sysfs.h>
#include <linux/hwmon.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/types.h>
/*
* Addresses to scan
* Address is fully defined internally and cannot be changed except for
* LM64 which has one pin dedicated to address selection.
* LM63 and LM96163 have address 0x4c.
* LM64 can have address 0x18 or 0x4e.
*/
static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
/*
* The LM63 registers
*/
#define LM63_REG_CONFIG1 0x03
#define LM63_REG_CONVRATE 0x04
#define LM63_REG_CONFIG2 0xBF
#define LM63_REG_CONFIG_FAN 0x4A
#define LM63_REG_TACH_COUNT_MSB 0x47
#define LM63_REG_TACH_COUNT_LSB 0x46
#define LM63_REG_TACH_LIMIT_MSB 0x49
#define LM63_REG_TACH_LIMIT_LSB 0x48
#define LM63_REG_PWM_VALUE 0x4C
#define LM63_REG_PWM_FREQ 0x4D
#define LM63_REG_LUT_TEMP_HYST 0x4F
#define LM63_REG_LUT_TEMP(nr) (0x50 + 2 * (nr))
#define LM63_REG_LUT_PWM(nr) (0x51 + 2 * (nr))
#define LM63_REG_LOCAL_TEMP 0x00
#define LM63_REG_LOCAL_HIGH 0x05
#define LM63_REG_REMOTE_TEMP_MSB 0x01
#define LM63_REG_REMOTE_TEMP_LSB 0x10
#define LM63_REG_REMOTE_OFFSET_MSB 0x11
#define LM63_REG_REMOTE_OFFSET_LSB 0x12
#define LM63_REG_REMOTE_HIGH_MSB 0x07
#define LM63_REG_REMOTE_HIGH_LSB 0x13
#define LM63_REG_REMOTE_LOW_MSB 0x08
#define LM63_REG_REMOTE_LOW_LSB 0x14
#define LM63_REG_REMOTE_TCRIT 0x19
#define LM63_REG_REMOTE_TCRIT_HYST 0x21
#define LM63_REG_ALERT_STATUS 0x02
#define LM63_REG_ALERT_MASK 0x16
#define LM63_REG_MAN_ID 0xFE
#define LM63_REG_CHIP_ID 0xFF
#define LM96163_REG_TRUTHERM 0x30
#define LM96163_REG_REMOTE_TEMP_U_MSB 0x31
#define LM96163_REG_REMOTE_TEMP_U_LSB 0x32
#define LM96163_REG_CONFIG_ENHANCED 0x45
#define LM63_MAX_CONVRATE 9
#define LM63_MAX_CONVRATE_HZ 32
#define LM96163_MAX_CONVRATE_HZ 26
/*
* Conversions and various macros
* For tachometer counts, the LM63 uses 16-bit values.
* For local temperature and high limit, remote critical limit and hysteresis
* value, it uses signed 8-bit values with LSB = 1 degree Celsius.
* For remote temperature, low and high limits, it uses signed 11-bit values
* with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
* For LM64 the actual remote diode temperature is 16 degree Celsius higher
* than the register reading. Remote temperature setpoints have to be
* adapted accordingly.
*/
#define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
5400000 / (reg))
#define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \
(5400000 / (val)) & 0xFFFC)
#define TEMP8_FROM_REG(reg) ((reg) * 1000)
#define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \
(val) >= 127000 ? 127 : \
(val) < 0 ? ((val) - 500) / 1000 : \
((val) + 500) / 1000)
#define TEMP8U_TO_REG(val) ((val) <= 0 ? 0 : \
(val) >= 255000 ? 255 : \
((val) + 500) / 1000)
#define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
#define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
(val) >= 127875 ? 0x7FE0 : \
(val) < 0 ? ((val) - 62) / 125 * 32 : \
((val) + 62) / 125 * 32)
#define TEMP11U_TO_REG(val) ((val) <= 0 ? 0 : \
(val) >= 255875 ? 0xFFE0 : \
((val) + 62) / 125 * 32)
#define HYST_TO_REG(val) ((val) <= 0 ? 0 : \
(val) >= 127000 ? 127 : \
((val) + 500) / 1000)
#define UPDATE_INTERVAL(max, rate) \
((1000 << (LM63_MAX_CONVRATE - (rate))) / (max))
enum chips { lm63, lm64, lm96163 };
/*
* Client data (each client gets its own)
*/
struct lm63_data {
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
char lut_valid; /* zero until lut fields are valid */
unsigned long last_updated; /* in jiffies */
unsigned long lut_last_updated; /* in jiffies */
enum chips kind;
int temp2_offset;
int update_interval; /* in milliseconds */
int max_convrate_hz;
int lut_size; /* 8 or 12 */
/* registers values */
u8 config, config_fan;
u16 fan[2]; /* 0: input
1: low limit */
u8 pwm1_freq;
u8 pwm1[13]; /* 0: current output
1-12: lookup table */
s8 temp8[15]; /* 0: local input
1: local high limit
2: remote critical limit
3-14: lookup table */
s16 temp11[4]; /* 0: remote input
1: remote low limit
2: remote high limit
3: remote offset */
u16 temp11u; /* remote input (unsigned) */
u8 temp2_crit_hyst;
u8 lut_temp_hyst;
u8 alarms;
bool pwm_highres;
bool lut_temp_highres;
bool remote_unsigned; /* true if unsigned remote upper limits */
bool trutherm;
};
static inline int temp8_from_reg(struct lm63_data *data, int nr)
{
if (data->remote_unsigned)
return TEMP8_FROM_REG((u8)data->temp8[nr]);
return TEMP8_FROM_REG(data->temp8[nr]);
}
static inline int lut_temp_from_reg(struct lm63_data *data, int nr)
{
return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000);
}
static inline int lut_temp_to_reg(struct lm63_data *data, long val)
{
val -= data->temp2_offset;
if (data->lut_temp_highres)
return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500);
else
return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000);
}
/*
* Update the lookup table register cache.
* client->update_lock must be held when calling this function.
*/
static void lm63_update_lut(struct i2c_client *client)
{
struct lm63_data *data = i2c_get_clientdata(client);
int i;
if (time_after(jiffies, data->lut_last_updated + 5 * HZ) ||
!data->lut_valid) {
for (i = 0; i < data->lut_size; i++) {
data->pwm1[1 + i] = i2c_smbus_read_byte_data(client,
LM63_REG_LUT_PWM(i));
data->temp8[3 + i] = i2c_smbus_read_byte_data(client,
LM63_REG_LUT_TEMP(i));
}
data->lut_temp_hyst = i2c_smbus_read_byte_data(client,
LM63_REG_LUT_TEMP_HYST);
data->lut_last_updated = jiffies;
data->lut_valid = 1;
}
}
static struct lm63_data *lm63_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm63_data *data = i2c_get_clientdata(client);
unsigned long next_update;
mutex_lock(&data->update_lock);
next_update = data->last_updated +
msecs_to_jiffies(data->update_interval);
if (time_after(jiffies, next_update) || !data->valid) {
if (data->config & 0x04) { /* tachometer enabled */
/* order matters for fan1_input */
data->fan[0] = i2c_smbus_read_byte_data(client,
LM63_REG_TACH_COUNT_LSB) & 0xFC;
data->fan[0] |= i2c_smbus_read_byte_data(client,
LM63_REG_TACH_COUNT_MSB) << 8;
data->fan[1] = (i2c_smbus_read_byte_data(client,
LM63_REG_TACH_LIMIT_LSB) & 0xFC)
| (i2c_smbus_read_byte_data(client,
LM63_REG_TACH_LIMIT_MSB) << 8);
}
data->pwm1_freq = i2c_smbus_read_byte_data(client,
LM63_REG_PWM_FREQ);
if (data->pwm1_freq == 0)
data->pwm1_freq = 1;
data->pwm1[0] = i2c_smbus_read_byte_data(client,
LM63_REG_PWM_VALUE);
data->temp8[0] = i2c_smbus_read_byte_data(client,
LM63_REG_LOCAL_TEMP);
data->temp8[1] = i2c_smbus_read_byte_data(client,
LM63_REG_LOCAL_HIGH);
/* order matters for temp2_input */
data->temp11[0] = i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_TEMP_MSB) << 8;
data->temp11[0] |= i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_TEMP_LSB);
data->temp11[1] = (i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_LOW_MSB) << 8)
| i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_LOW_LSB);
data->temp11[2] = (i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_HIGH_MSB) << 8)
| i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_HIGH_LSB);
data->temp11[3] = (i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_OFFSET_MSB) << 8)
| i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_OFFSET_LSB);
if (data->kind == lm96163)
data->temp11u = (i2c_smbus_read_byte_data(client,
LM96163_REG_REMOTE_TEMP_U_MSB) << 8)
| i2c_smbus_read_byte_data(client,
LM96163_REG_REMOTE_TEMP_U_LSB);
data->temp8[2] = i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_TCRIT);
data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_TCRIT_HYST);
data->alarms = i2c_smbus_read_byte_data(client,
LM63_REG_ALERT_STATUS) & 0x7F;
data->last_updated = jiffies;
data->valid = 1;
}
lm63_update_lut(client);
mutex_unlock(&data->update_lock);
return data;
}
/*
* Trip points in the lookup table should be in ascending order for both
* temperatures and PWM output values.
*/
static int lm63_lut_looks_bad(struct i2c_client *client)
{
struct lm63_data *data = i2c_get_clientdata(client);
int i;
mutex_lock(&data->update_lock);
lm63_update_lut(client);
for (i = 1; i < data->lut_size; i++) {
if (data->pwm1[1 + i - 1] > data->pwm1[1 + i]
|| data->temp8[3 + i - 1] > data->temp8[3 + i]) {
dev_warn(&client->dev,
"Lookup table doesn't look sane (check entries %d and %d)\n",
i, i + 1);
break;
}
}
mutex_unlock(&data->update_lock);
return i == data->lut_size ? 0 : 1;
}
/*
* Sysfs callback functions and files
*/
static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm63_data *data = lm63_update_device(dev);
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
}
static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm63_data *data = i2c_get_clientdata(client);
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->fan[1] = FAN_TO_REG(val);
i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
data->fan[1] & 0xFF);
i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
data->fan[1] >> 8);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm63_data *data = lm63_update_device(dev);
int nr = attr->index;
int pwm;
if (data->pwm_highres)
pwm = data->pwm1[nr];
else
pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ?
255 : (data->pwm1[nr] * 255 + data->pwm1_freq) /
(2 * data->pwm1_freq);
return sprintf(buf, "%d\n", pwm);
}
static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct lm63_data *data = i2c_get_clientdata(client);
int nr = attr->index;
unsigned long val;
int err;
u8 reg;
if (!(data->config_fan & 0x20)) /* register is read-only */
return -EPERM;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE;
val = clamp_val(val, 0, 255);
mutex_lock(&data->update_lock);
data->pwm1[nr] = data->pwm_highres ? val :
(val * data->pwm1_freq * 2 + 127) / 255;
i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_pwm1_enable(struct device *dev,
struct device_attribute *dummy, char *buf)
{
struct lm63_data *data = lm63_update_device(dev);
return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
}
static ssize_t set_pwm1_enable(struct device *dev,
struct device_attribute *dummy,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm63_data *data = i2c_get_clientdata(client);
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
if (val < 1 || val > 2)
return -EINVAL;
/*
* Only let the user switch to automatic mode if the lookup table
* looks sane.
*/
if (val == 2 && lm63_lut_looks_bad(client))
return -EPERM;
mutex_lock(&data->update_lock);
data->config_fan = i2c_smbus_read_byte_data(client,
LM63_REG_CONFIG_FAN);
if (val == 1)
data->config_fan |= 0x20;
else
data->config_fan &= ~0x20;
i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN,
data->config_fan);
mutex_unlock(&data->update_lock);
return count;
}
/*
* There are 8bit registers for both local(temp1) and remote(temp2) sensor.
* For remote sensor registers temp2_offset has to be considered,
* for local sensor it must not.
* So we need separate 8bit accessors for local and remote sensor.
*/
static ssize_t show_local_temp8(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm63_data *data = lm63_update_device(dev);
return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
}
static ssize_t show_remote_temp8(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm63_data *data = lm63_update_device(dev);
return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index)
+ data->temp2_offset);
}
static ssize_t show_lut_temp(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm63_data *data = lm63_update_device(dev);
return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
+ data->temp2_offset);
}
static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct lm63_data *data = i2c_get_clientdata(client);
int nr = attr->index;
long val;
int err;
int temp;
u8 reg;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
switch (nr) {
case 2:
reg = LM63_REG_REMOTE_TCRIT;
if (data->remote_unsigned)
temp = TEMP8U_TO_REG(val - data->temp2_offset);
else
temp = TEMP8_TO_REG(val - data->temp2_offset);
break;
case 1:
reg = LM63_REG_LOCAL_HIGH;
temp = TEMP8_TO_REG(val);
break;
default: /* lookup table */
reg = LM63_REG_LUT_TEMP(nr - 3);
temp = lut_temp_to_reg(data, val);
}
data->temp8[nr] = temp;
i2c_smbus_write_byte_data(client, reg, temp);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm63_data *data = lm63_update_device(dev);
int nr = attr->index;
int temp;
if (!nr) {
/*
* Use unsigned temperature unless its value is zero.
* If it is zero, use signed temperature.
*/
if (data->temp11u)
temp = TEMP11_FROM_REG(data->temp11u);
else
temp = TEMP11_FROM_REG(data->temp11[nr]);
} else {
if (data->remote_unsigned && nr == 2)
temp = TEMP11_FROM_REG((u16)data->temp11[nr]);
else
temp = TEMP11_FROM_REG(data->temp11[nr]);
}
return sprintf(buf, "%d\n", temp + data->temp2_offset);
}
static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
static const u8 reg[6] = {
LM63_REG_REMOTE_LOW_MSB,
LM63_REG_REMOTE_LOW_LSB,
LM63_REG_REMOTE_HIGH_MSB,
LM63_REG_REMOTE_HIGH_LSB,
LM63_REG_REMOTE_OFFSET_MSB,
LM63_REG_REMOTE_OFFSET_LSB,
};
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct lm63_data *data = i2c_get_clientdata(client);
long val;
int err;
int nr = attr->index;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
if (data->remote_unsigned && nr == 2)
data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset);
else
data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
data->temp11[nr] >> 8);
i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
data->temp11[nr] & 0xff);
mutex_unlock(&data->update_lock);
return count;
}
/*
* Hysteresis register holds a relative value, while we want to present
* an absolute to user-space
*/
static ssize_t show_temp2_crit_hyst(struct device *dev,
struct device_attribute *dummy, char *buf)
{
struct lm63_data *data = lm63_update_device(dev);
return sprintf(buf, "%d\n", temp8_from_reg(data, 2)
+ data->temp2_offset
- TEMP8_FROM_REG(data->temp2_crit_hyst));
}
static ssize_t show_lut_temp_hyst(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm63_data *data = lm63_update_device(dev);
return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
+ data->temp2_offset
- TEMP8_FROM_REG(data->lut_temp_hyst));
}
/*
* And now the other way around, user-space provides an absolute
* hysteresis value and we have to store a relative one
*/
static ssize_t set_temp2_crit_hyst(struct device *dev,
struct device_attribute *dummy,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm63_data *data = i2c_get_clientdata(client);
long val;
int err;
long hyst;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
hyst = temp8_from_reg(data, 2) + data->temp2_offset - val;
i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
HYST_TO_REG(hyst));
mutex_unlock(&data->update_lock);
return count;
}
/*
* Set conversion rate.
* client->update_lock must be held when calling this function.
*/
static void lm63_set_convrate(struct i2c_client *client, struct lm63_data *data,
unsigned int interval)
{
int i;
unsigned int update_interval;
/* Shift calculations to avoid rounding errors */
interval <<= 6;
/* find the nearest update rate */
update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000
/ data->max_convrate_hz;
for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1)
if (interval >= update_interval * 3 / 4)
break;
i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i);
data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i);
}
static ssize_t show_update_interval(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct lm63_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", data->update_interval);
}
static ssize_t set_update_interval(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm63_data *data = i2c_get_clientdata(client);
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
lm63_set_convrate(client, data, clamp_val(val, 0, 100000));
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_type(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm63_data *data = i2c_get_clientdata(client);
return sprintf(buf, data->trutherm ? "1\n" : "2\n");
}
static ssize_t set_type(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm63_data *data = i2c_get_clientdata(client);
unsigned long val;
int ret;
u8 reg;
ret = kstrtoul(buf, 10, &val);
if (ret < 0)
return ret;
if (val != 1 && val != 2)
return -EINVAL;
mutex_lock(&data->update_lock);
data->trutherm = val == 1;
reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
reg | (data->trutherm ? 0x02 : 0x00));
data->valid = 0;
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
char *buf)
{
struct lm63_data *data = lm63_update_device(dev);
return sprintf(buf, "%u\n", data->alarms);
}
static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm63_data *data = lm63_update_device(dev);
int bitnr = attr->index;
return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
}
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
set_fan, 1);
static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0);
static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
show_pwm1_enable, set_pwm1_enable);
static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 1);
static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 2);
static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 4);
static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 4);
static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 5);
static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 5);
static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 4);
static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 6);
static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 6);
static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 5);
static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 7);
static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 7);
static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 6);
static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 8);
static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 8);
static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 7);
static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 9);
static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 9);
static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 8);
static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 10);
static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 10);
static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 9);
static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 11);
static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 11);
static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 10);
static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 12);
static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 12);
static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 11);
static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 13);
static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 13);
static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO,
show_pwm1, set_pwm1, 12);
static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO,
show_lut_temp, set_temp8, 14);
static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO,
show_lut_temp_hyst, NULL, 14);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
set_temp8, 1);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
set_temp11, 1);
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
set_temp11, 2);
static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
set_temp11, 3);
static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
set_temp8, 2);
static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
set_temp2_crit_hyst);
static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type);
/* Individual alarm files */
static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
/* Raw alarm file for compatibility */
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
set_update_interval);
static struct attribute *lm63_attributes[] = {
&sensor_dev_attr_pwm1.dev_attr.attr,
&dev_attr_pwm1_enable.attr,
&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp2_offset.dev_attr.attr,
&sensor_dev_attr_temp2_crit.dev_attr.attr,
&dev_attr_temp2_crit_hyst.attr,
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_fault.dev_attr.attr,
&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
&dev_attr_alarms.attr,
&dev_attr_update_interval.attr,
NULL
};
static struct attribute *lm63_attributes_extra_lut[] = {
&sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr,
NULL
};
static const struct attribute_group lm63_group_extra_lut = {
.attrs = lm63_attributes_extra_lut,
};
/*
* On LM63, temp2_crit can be set only once, which should be job
* of the bootloader.
* On LM64, temp2_crit can always be set.
* On LM96163, temp2_crit can be set if bit 1 of the configuration
* register is true.
*/
static umode_t lm63_attribute_mode(struct kobject *kobj,
struct attribute *attr, int index)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct i2c_client *client = to_i2c_client(dev);
struct lm63_data *data = i2c_get_clientdata(client);
if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr
&& (data->kind == lm64 ||
(data->kind == lm96163 && (data->config & 0x02))))
return attr->mode | S_IWUSR;
return attr->mode;
}
static const struct attribute_group lm63_group = {
.is_visible = lm63_attribute_mode,
.attrs = lm63_attributes,
};
static struct attribute *lm63_attributes_fan1[] = {
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_fan1_min.dev_attr.attr,
&sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
NULL
};
static const struct attribute_group lm63_group_fan1 = {
.attrs = lm63_attributes_fan1,
};
/*
* Real code
*/
/* Return 0 if detection is successful, -ENODEV otherwise */
static int lm63_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
u8 man_id, chip_id, reg_config1, reg_config2;
u8 reg_alert_status, reg_alert_mask;
int address = client->addr;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID);
chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID);
reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2);
reg_alert_status = i2c_smbus_read_byte_data(client,
LM63_REG_ALERT_STATUS);
reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK);
if (man_id != 0x01 /* National Semiconductor */
|| (reg_config1 & 0x18) != 0x00
|| (reg_config2 & 0xF8) != 0x00
|| (reg_alert_status & 0x20) != 0x00
|| (reg_alert_mask & 0xA4) != 0xA4) {
dev_dbg(&adapter->dev,
"Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
man_id, chip_id);
return -ENODEV;
}
if (chip_id == 0x41 && address == 0x4c)
strlcpy(info->type, "lm63", I2C_NAME_SIZE);
else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
strlcpy(info->type, "lm64", I2C_NAME_SIZE);
else if (chip_id == 0x49 && address == 0x4c)
strlcpy(info->type, "lm96163", I2C_NAME_SIZE);
else
return -ENODEV;
return 0;
}
/*
* Ideally we shouldn't have to initialize anything, since the BIOS
* should have taken care of everything
*/
static void lm63_init_client(struct i2c_client *client)
{
struct lm63_data *data = i2c_get_clientdata(client);
u8 convrate;
data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
data->config_fan = i2c_smbus_read_byte_data(client,
LM63_REG_CONFIG_FAN);
/* Start converting if needed */
if (data->config & 0x40) { /* standby */
dev_dbg(&client->dev, "Switching to operational mode\n");
data->config &= 0xA7;
i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
data->config);
}
/* Tachometer is always enabled on LM64 */
if (data->kind == lm64)
data->config |= 0x04;
/* We may need pwm1_freq before ever updating the client data */
data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
if (data->pwm1_freq == 0)
data->pwm1_freq = 1;
switch (data->kind) {
case lm63:
case lm64:
data->max_convrate_hz = LM63_MAX_CONVRATE_HZ;
data->lut_size = 8;
break;
case lm96163:
data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ;
data->lut_size = 12;
data->trutherm
= i2c_smbus_read_byte_data(client,
LM96163_REG_TRUTHERM) & 0x02;
break;
}
convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE);
if (unlikely(convrate > LM63_MAX_CONVRATE))
convrate = LM63_MAX_CONVRATE;
data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz,
convrate);
/*
* For LM96163, check if high resolution PWM
* and unsigned temperature format is enabled.
*/
if (data->kind == lm96163) {
u8 config_enhanced
= i2c_smbus_read_byte_data(client,
LM96163_REG_CONFIG_ENHANCED);
if (config_enhanced & 0x20)
data->lut_temp_highres = true;
if ((config_enhanced & 0x10)
&& !(data->config_fan & 0x08) && data->pwm1_freq == 8)
data->pwm_highres = true;
if (config_enhanced & 0x08)
data->remote_unsigned = true;
}
/* Show some debug info about the LM63 configuration */
if (data->kind == lm63)
dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
(data->config & 0x04) ? "tachometer input" :
"alert output");
dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
(data->config_fan & 0x08) ? "1.4" : "360",
((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
(data->config_fan & 0x10) ? "low" : "high",
(data->config_fan & 0x20) ? "manual" : "auto");
}
static int lm63_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct lm63_data *data;
int err;
data = devm_kzalloc(&client->dev, sizeof(struct lm63_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->valid = 0;
mutex_init(&data->update_lock);
/* Set the device type */
data->kind = id->driver_data;
if (data->kind == lm64)
data->temp2_offset = 16000;
/* Initialize chip */
lm63_init_client(client);
/* Register sysfs hooks */
err = sysfs_create_group(&client->dev.kobj, &lm63_group);
if (err)
return err;
if (data->config & 0x04) { /* tachometer enabled */
err = sysfs_create_group(&client->dev.kobj, &lm63_group_fan1);
if (err)
goto exit_remove_files;
}
if (data->kind == lm96163) {
err = device_create_file(&client->dev, &dev_attr_temp2_type);
if (err)
goto exit_remove_files;
err = sysfs_create_group(&client->dev.kobj,
&lm63_group_extra_lut);
if (err)
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, &lm63_group);
sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
if (data->kind == lm96163) {
device_remove_file(&client->dev, &dev_attr_temp2_type);
sysfs_remove_group(&client->dev.kobj, &lm63_group_extra_lut);
}
return err;
}
static int lm63_remove(struct i2c_client *client)
{
struct lm63_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &lm63_group);
sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
if (data->kind == lm96163) {
device_remove_file(&client->dev, &dev_attr_temp2_type);
sysfs_remove_group(&client->dev.kobj, &lm63_group_extra_lut);
}
return 0;
}
/*
* Driver data (common to all clients)
*/
static const struct i2c_device_id lm63_id[] = {
{ "lm63", lm63 },
{ "lm64", lm64 },
{ "lm96163", lm96163 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm63_id);
static struct i2c_driver lm63_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "lm63",
},
.probe = lm63_probe,
.remove = lm63_remove,
.id_table = lm63_id,
.detect = lm63_detect,
.address_list = normal_i2c,
};
module_i2c_driver(lm63_driver);
MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
MODULE_DESCRIPTION("LM63 driver");
MODULE_LICENSE("GPL");