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linux/drivers/hwmon/ftsteutates.c
Guenter Roeck 4c8702b3cd hwmon: (ftsteutates) Fix potential memory access error 
Using set_bit() to set a bit in an integer is not a good idea, since
the function expects an unsigned long as argument, which can be 64 bit
wide. Coverity reports this problem as

>>>     CID 1364488:  Memory - illegal accesses  (INCOMPATIBLE_CAST)
>>>     Pointer "&ret" points to an object whose effective type is "int"
>>>	(32 bits, signed) but is dereferenced as a wider "unsigned
+long" (64 bits, unsigned).  This may lead to memory corruption.
245                     set_bit(1, (unsigned long *)&ret);

Just use BIT instead.

Cc: Thilo Cestonaro <thilo@cestona.ro>
Fixes: 08426eda58 ("hwmon: Add driver for FTS BMC chip "Teutates"")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2016-07-31 15:02:51 -07:00

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/*
* Support for the FTS Systemmonitoring Chip "Teutates"
*
* Copyright (C) 2016 Fujitsu Technology Solutions GmbH,
* Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>
*
* 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.
*
*/
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/uaccess.h>
#include <linux/watchdog.h>
#define FTS_DEVICE_ID_REG 0x0000
#define FTS_DEVICE_REVISION_REG 0x0001
#define FTS_DEVICE_STATUS_REG 0x0004
#define FTS_SATELLITE_STATUS_REG 0x0005
#define FTS_EVENT_STATUS_REG 0x0006
#define FTS_GLOBAL_CONTROL_REG 0x0007
#define FTS_SENSOR_EVENT_REG 0x0010
#define FTS_FAN_EVENT_REG 0x0014
#define FTS_FAN_PRESENT_REG 0x0015
#define FTS_POWER_ON_TIME_COUNTER_A 0x007A
#define FTS_POWER_ON_TIME_COUNTER_B 0x007B
#define FTS_POWER_ON_TIME_COUNTER_C 0x007C
#define FTS_PAGE_SELECT_REG 0x007F
#define FTS_WATCHDOG_TIME_PRESET 0x000B
#define FTS_WATCHDOG_CONTROL 0x5081
#define FTS_NO_FAN_SENSORS 0x08
#define FTS_NO_TEMP_SENSORS 0x10
#define FTS_NO_VOLT_SENSORS 0x04
static struct i2c_device_id fts_id[] = {
{ "ftsteutates", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, fts_id);
enum WATCHDOG_RESOLUTION {
seconds = 1,
minutes = 60
};
struct fts_data {
struct i2c_client *client;
/* update sensor data lock */
struct mutex update_lock;
/* read/write register lock */
struct mutex access_lock;
unsigned long last_updated; /* in jiffies */
struct watchdog_device wdd;
enum WATCHDOG_RESOLUTION resolution;
bool valid; /* false until following fields are valid */
u8 volt[FTS_NO_VOLT_SENSORS];
u8 temp_input[FTS_NO_TEMP_SENSORS];
u8 temp_alarm;
u8 fan_present;
u8 fan_input[FTS_NO_FAN_SENSORS]; /* in rps */
u8 fan_source[FTS_NO_FAN_SENSORS];
u8 fan_alarm;
};
#define FTS_REG_FAN_INPUT(idx) ((idx) + 0x20)
#define FTS_REG_FAN_SOURCE(idx) ((idx) + 0x30)
#define FTS_REG_FAN_CONTROL(idx) (((idx) << 16) + 0x4881)
#define FTS_REG_TEMP_INPUT(idx) ((idx) + 0x40)
#define FTS_REG_TEMP_CONTROL(idx) (((idx) << 16) + 0x0681)
#define FTS_REG_VOLT(idx) ((idx) + 0x18)
/*****************************************************************************/
/* I2C Helper functions */
/*****************************************************************************/
static int fts_read_byte(struct i2c_client *client, unsigned short reg)
{
int ret;
unsigned char page = reg >> 8;
struct fts_data *data = dev_get_drvdata(&client->dev);
mutex_lock(&data->access_lock);
dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
if (ret < 0)
goto error;
reg &= 0xFF;
ret = i2c_smbus_read_byte_data(client, reg);
dev_dbg(&client->dev, "read - reg: 0x%.02x: val: 0x%.02x\n", reg, ret);
error:
mutex_unlock(&data->access_lock);
return ret;
}
static int fts_write_byte(struct i2c_client *client, unsigned short reg,
unsigned char value)
{
int ret;
unsigned char page = reg >> 8;
struct fts_data *data = dev_get_drvdata(&client->dev);
mutex_lock(&data->access_lock);
dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
if (ret < 0)
goto error;
reg &= 0xFF;
dev_dbg(&client->dev,
"write - reg: 0x%.02x: val: 0x%.02x\n", reg, value);
ret = i2c_smbus_write_byte_data(client, reg, value);
error:
mutex_unlock(&data->access_lock);
return ret;
}
/*****************************************************************************/
/* Data Updater Helper function */
/*****************************************************************************/
static int fts_update_device(struct fts_data *data)
{
int i;
int err = 0;
mutex_lock(&data->update_lock);
if (!time_after(jiffies, data->last_updated + 2 * HZ) && data->valid)
goto exit;
err = fts_read_byte(data->client, FTS_DEVICE_STATUS_REG);
if (err < 0)
goto exit;
data->valid = !!(err & 0x02); /* Data not ready yet */
if (unlikely(!data->valid)) {
err = -EAGAIN;
goto exit;
}
err = fts_read_byte(data->client, FTS_FAN_PRESENT_REG);
if (err < 0)
goto exit;
data->fan_present = err;
err = fts_read_byte(data->client, FTS_FAN_EVENT_REG);
if (err < 0)
goto exit;
data->fan_alarm = err;
for (i = 0; i < FTS_NO_FAN_SENSORS; i++) {
if (data->fan_present & BIT(i)) {
err = fts_read_byte(data->client, FTS_REG_FAN_INPUT(i));
if (err < 0)
goto exit;
data->fan_input[i] = err;
err = fts_read_byte(data->client,
FTS_REG_FAN_SOURCE(i));
if (err < 0)
goto exit;
data->fan_source[i] = err;
} else {
data->fan_input[i] = 0;
data->fan_source[i] = 0;
}
}
err = fts_read_byte(data->client, FTS_SENSOR_EVENT_REG);
if (err < 0)
goto exit;
data->temp_alarm = err;
for (i = 0; i < FTS_NO_TEMP_SENSORS; i++) {
err = fts_read_byte(data->client, FTS_REG_TEMP_INPUT(i));
if (err < 0)
goto exit;
data->temp_input[i] = err;
}
for (i = 0; i < FTS_NO_VOLT_SENSORS; i++) {
err = fts_read_byte(data->client, FTS_REG_VOLT(i));
if (err < 0)
goto exit;
data->volt[i] = err;
}
data->last_updated = jiffies;
err = 0;
exit:
mutex_unlock(&data->update_lock);
return err;
}
/*****************************************************************************/
/* Watchdog functions */
/*****************************************************************************/
static int fts_wd_set_resolution(struct fts_data *data,
enum WATCHDOG_RESOLUTION resolution)
{
int ret;
if (data->resolution == resolution)
return 0;
ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
if (ret < 0)
return ret;
if ((resolution == seconds && ret & BIT(1)) ||
(resolution == minutes && (ret & BIT(1)) == 0)) {
data->resolution = resolution;
return 0;
}
if (resolution == seconds)
ret |= BIT(1);
else
ret &= ~BIT(1);
ret = fts_write_byte(data->client, FTS_WATCHDOG_CONTROL, ret);
if (ret < 0)
return ret;
data->resolution = resolution;
return ret;
}
static int fts_wd_set_timeout(struct watchdog_device *wdd, unsigned int timeout)
{
struct fts_data *data;
enum WATCHDOG_RESOLUTION resolution = seconds;
int ret;
data = watchdog_get_drvdata(wdd);
/* switch watchdog resolution to minutes if timeout does not fit
* into a byte
*/
if (timeout > 0xFF) {
timeout = DIV_ROUND_UP(timeout, 60) * 60;
resolution = minutes;
}
ret = fts_wd_set_resolution(data, resolution);
if (ret < 0)
return ret;
wdd->timeout = timeout;
return 0;
}
static int fts_wd_start(struct watchdog_device *wdd)
{
struct fts_data *data = watchdog_get_drvdata(wdd);
return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET,
wdd->timeout / (u8)data->resolution);
}
static int fts_wd_stop(struct watchdog_device *wdd)
{
struct fts_data *data;
data = watchdog_get_drvdata(wdd);
return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, 0);
}
static const struct watchdog_info fts_wd_info = {
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
.identity = "FTS Teutates Hardware Watchdog",
};
static const struct watchdog_ops fts_wd_ops = {
.owner = THIS_MODULE,
.start = fts_wd_start,
.stop = fts_wd_stop,
.set_timeout = fts_wd_set_timeout,
};
static int fts_watchdog_init(struct fts_data *data)
{
int timeout, ret;
watchdog_set_drvdata(&data->wdd, data);
timeout = fts_read_byte(data->client, FTS_WATCHDOG_TIME_PRESET);
if (timeout < 0)
return timeout;
/* watchdog not running, set timeout to a default of 60 sec. */
if (timeout == 0) {
ret = fts_wd_set_resolution(data, seconds);
if (ret < 0)
return ret;
data->wdd.timeout = 60;
} else {
ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
if (ret < 0)
return ret;
data->resolution = ret & BIT(1) ? seconds : minutes;
data->wdd.timeout = timeout * (u8)data->resolution;
set_bit(WDOG_HW_RUNNING, &data->wdd.status);
}
/* Register our watchdog part */
data->wdd.info = &fts_wd_info;
data->wdd.ops = &fts_wd_ops;
data->wdd.parent = &data->client->dev;
data->wdd.min_timeout = 1;
/* max timeout 255 minutes. */
data->wdd.max_hw_heartbeat_ms = 0xFF * 60 * MSEC_PER_SEC;
return watchdog_register_device(&data->wdd);
}
/*****************************************************************************/
/* SysFS handler functions */
/*****************************************************************************/
static ssize_t show_in_value(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%u\n", data->volt[index]);
}
static ssize_t show_temp_value(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%u\n", data->temp_input[index]);
}
static ssize_t show_temp_fault(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
/* 00h Temperature = Sensor Error */
return sprintf(buf, "%d\n", data->temp_input[index] == 0);
}
static ssize_t show_temp_alarm(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%u\n", !!(data->temp_alarm & BIT(index)));
}
static ssize_t
clear_temp_alarm(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
long ret;
ret = fts_update_device(data);
if (ret < 0)
return ret;
if (kstrtoul(buf, 10, &ret) || ret != 0)
return -EINVAL;
mutex_lock(&data->update_lock);
ret = fts_read_byte(data->client, FTS_REG_TEMP_CONTROL(index));
if (ret < 0)
goto error;
ret = fts_write_byte(data->client, FTS_REG_TEMP_CONTROL(index),
ret | 0x1);
if (ret < 0)
goto error;
data->valid = false;
error:
mutex_unlock(&data->update_lock);
return ret;
}
static ssize_t show_fan_value(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%u\n", data->fan_input[index]);
}
static ssize_t show_fan_source(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%u\n", data->fan_source[index]);
}
static ssize_t show_fan_alarm(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%d\n", !!(data->fan_alarm & BIT(index)));
}
static ssize_t
clear_fan_alarm(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
long ret;
ret = fts_update_device(data);
if (ret < 0)
return ret;
if (kstrtoul(buf, 10, &ret) || ret != 0)
return -EINVAL;
mutex_lock(&data->update_lock);
ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(index));
if (ret < 0)
goto error;
ret = fts_write_byte(data->client, FTS_REG_FAN_CONTROL(index),
ret | 0x1);
if (ret < 0)
goto error;
data->valid = false;
error:
mutex_unlock(&data->update_lock);
return ret;
}
/*****************************************************************************/
/* SysFS structs */
/*****************************************************************************/
/* Temprature sensors */
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_value, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_value, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_value, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_value, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_value, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_value, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp_value, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp_value, NULL, 7);
static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp_value, NULL, 8);
static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp_value, NULL, 9);
static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO, show_temp_value, NULL, 10);
static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO, show_temp_value, NULL, 11);
static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO, show_temp_value, NULL, 12);
static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO, show_temp_value, NULL, 13);
static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO, show_temp_value, NULL, 14);
static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO, show_temp_value, NULL, 15);
static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
static SENSOR_DEVICE_ATTR(temp9_fault, S_IRUGO, show_temp_fault, NULL, 8);
static SENSOR_DEVICE_ATTR(temp10_fault, S_IRUGO, show_temp_fault, NULL, 9);
static SENSOR_DEVICE_ATTR(temp11_fault, S_IRUGO, show_temp_fault, NULL, 10);
static SENSOR_DEVICE_ATTR(temp12_fault, S_IRUGO, show_temp_fault, NULL, 11);
static SENSOR_DEVICE_ATTR(temp13_fault, S_IRUGO, show_temp_fault, NULL, 12);
static SENSOR_DEVICE_ATTR(temp14_fault, S_IRUGO, show_temp_fault, NULL, 13);
static SENSOR_DEVICE_ATTR(temp15_fault, S_IRUGO, show_temp_fault, NULL, 14);
static SENSOR_DEVICE_ATTR(temp16_fault, S_IRUGO, show_temp_fault, NULL, 15);
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 0);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 1);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 2);
static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 3);
static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 4);
static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 5);
static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 6);
static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 7);
static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 8);
static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 9);
static SENSOR_DEVICE_ATTR(temp11_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 10);
static SENSOR_DEVICE_ATTR(temp12_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 11);
static SENSOR_DEVICE_ATTR(temp13_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 12);
static SENSOR_DEVICE_ATTR(temp14_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 13);
static SENSOR_DEVICE_ATTR(temp15_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 14);
static SENSOR_DEVICE_ATTR(temp16_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
clear_temp_alarm, 15);
static struct attribute *fts_temp_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp4_input.dev_attr.attr,
&sensor_dev_attr_temp5_input.dev_attr.attr,
&sensor_dev_attr_temp6_input.dev_attr.attr,
&sensor_dev_attr_temp7_input.dev_attr.attr,
&sensor_dev_attr_temp8_input.dev_attr.attr,
&sensor_dev_attr_temp9_input.dev_attr.attr,
&sensor_dev_attr_temp10_input.dev_attr.attr,
&sensor_dev_attr_temp11_input.dev_attr.attr,
&sensor_dev_attr_temp12_input.dev_attr.attr,
&sensor_dev_attr_temp13_input.dev_attr.attr,
&sensor_dev_attr_temp14_input.dev_attr.attr,
&sensor_dev_attr_temp15_input.dev_attr.attr,
&sensor_dev_attr_temp16_input.dev_attr.attr,
&sensor_dev_attr_temp1_fault.dev_attr.attr,
&sensor_dev_attr_temp2_fault.dev_attr.attr,
&sensor_dev_attr_temp3_fault.dev_attr.attr,
&sensor_dev_attr_temp4_fault.dev_attr.attr,
&sensor_dev_attr_temp5_fault.dev_attr.attr,
&sensor_dev_attr_temp6_fault.dev_attr.attr,
&sensor_dev_attr_temp7_fault.dev_attr.attr,
&sensor_dev_attr_temp8_fault.dev_attr.attr,
&sensor_dev_attr_temp9_fault.dev_attr.attr,
&sensor_dev_attr_temp10_fault.dev_attr.attr,
&sensor_dev_attr_temp11_fault.dev_attr.attr,
&sensor_dev_attr_temp12_fault.dev_attr.attr,
&sensor_dev_attr_temp13_fault.dev_attr.attr,
&sensor_dev_attr_temp14_fault.dev_attr.attr,
&sensor_dev_attr_temp15_fault.dev_attr.attr,
&sensor_dev_attr_temp16_fault.dev_attr.attr,
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
&sensor_dev_attr_temp4_alarm.dev_attr.attr,
&sensor_dev_attr_temp5_alarm.dev_attr.attr,
&sensor_dev_attr_temp6_alarm.dev_attr.attr,
&sensor_dev_attr_temp7_alarm.dev_attr.attr,
&sensor_dev_attr_temp8_alarm.dev_attr.attr,
&sensor_dev_attr_temp9_alarm.dev_attr.attr,
&sensor_dev_attr_temp10_alarm.dev_attr.attr,
&sensor_dev_attr_temp11_alarm.dev_attr.attr,
&sensor_dev_attr_temp12_alarm.dev_attr.attr,
&sensor_dev_attr_temp13_alarm.dev_attr.attr,
&sensor_dev_attr_temp14_alarm.dev_attr.attr,
&sensor_dev_attr_temp15_alarm.dev_attr.attr,
&sensor_dev_attr_temp16_alarm.dev_attr.attr,
NULL
};
/* Fans */
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_value, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_value, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_value, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_value, NULL, 3);
static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_value, NULL, 4);
static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_value, NULL, 5);
static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_value, NULL, 6);
static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_value, NULL, 7);
static SENSOR_DEVICE_ATTR(fan1_source, S_IRUGO, show_fan_source, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_source, S_IRUGO, show_fan_source, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_source, S_IRUGO, show_fan_source, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_source, S_IRUGO, show_fan_source, NULL, 3);
static SENSOR_DEVICE_ATTR(fan5_source, S_IRUGO, show_fan_source, NULL, 4);
static SENSOR_DEVICE_ATTR(fan6_source, S_IRUGO, show_fan_source, NULL, 5);
static SENSOR_DEVICE_ATTR(fan7_source, S_IRUGO, show_fan_source, NULL, 6);
static SENSOR_DEVICE_ATTR(fan8_source, S_IRUGO, show_fan_source, NULL, 7);
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO | S_IWUSR,
show_fan_alarm, clear_fan_alarm, 0);
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO | S_IWUSR,
show_fan_alarm, clear_fan_alarm, 1);
static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO | S_IWUSR,
show_fan_alarm, clear_fan_alarm, 2);
static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO | S_IWUSR,
show_fan_alarm, clear_fan_alarm, 3);
static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO | S_IWUSR,
show_fan_alarm, clear_fan_alarm, 4);
static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO | S_IWUSR,
show_fan_alarm, clear_fan_alarm, 5);
static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO | S_IWUSR,
show_fan_alarm, clear_fan_alarm, 6);
static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO | S_IWUSR,
show_fan_alarm, clear_fan_alarm, 7);
static struct attribute *fts_fan_attrs[] = {
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_fan2_input.dev_attr.attr,
&sensor_dev_attr_fan3_input.dev_attr.attr,
&sensor_dev_attr_fan4_input.dev_attr.attr,
&sensor_dev_attr_fan5_input.dev_attr.attr,
&sensor_dev_attr_fan6_input.dev_attr.attr,
&sensor_dev_attr_fan7_input.dev_attr.attr,
&sensor_dev_attr_fan8_input.dev_attr.attr,
&sensor_dev_attr_fan1_source.dev_attr.attr,
&sensor_dev_attr_fan2_source.dev_attr.attr,
&sensor_dev_attr_fan3_source.dev_attr.attr,
&sensor_dev_attr_fan4_source.dev_attr.attr,
&sensor_dev_attr_fan5_source.dev_attr.attr,
&sensor_dev_attr_fan6_source.dev_attr.attr,
&sensor_dev_attr_fan7_source.dev_attr.attr,
&sensor_dev_attr_fan8_source.dev_attr.attr,
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
&sensor_dev_attr_fan3_alarm.dev_attr.attr,
&sensor_dev_attr_fan4_alarm.dev_attr.attr,
&sensor_dev_attr_fan5_alarm.dev_attr.attr,
&sensor_dev_attr_fan6_alarm.dev_attr.attr,
&sensor_dev_attr_fan7_alarm.dev_attr.attr,
&sensor_dev_attr_fan8_alarm.dev_attr.attr,
NULL
};
/* Voltages */
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_value, NULL, 0);
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_value, NULL, 1);
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_value, NULL, 2);
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_value, NULL, 3);
static struct attribute *fts_voltage_attrs[] = {
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_in4_input.dev_attr.attr,
NULL
};
static const struct attribute_group fts_voltage_attr_group = {
.attrs = fts_voltage_attrs
};
static const struct attribute_group fts_temp_attr_group = {
.attrs = fts_temp_attrs
};
static const struct attribute_group fts_fan_attr_group = {
.attrs = fts_fan_attrs
};
static const struct attribute_group *fts_attr_groups[] = {
&fts_voltage_attr_group,
&fts_temp_attr_group,
&fts_fan_attr_group,
NULL
};
/*****************************************************************************/
/* Module initialization / remove functions */
/*****************************************************************************/
static int fts_remove(struct i2c_client *client)
{
struct fts_data *data = dev_get_drvdata(&client->dev);
watchdog_unregister_device(&data->wdd);
return 0;
}
static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
u8 revision;
struct fts_data *data;
int err;
s8 deviceid;
struct device *hwmon_dev;
if (client->addr != 0x73)
return -ENODEV;
/* Baseboard Management Controller check */
deviceid = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
if (deviceid > 0 && (deviceid & 0xF0) == 0x10) {
switch (deviceid & 0x0F) {
case 0x01:
break;
default:
dev_dbg(&client->dev,
"No Baseboard Management Controller\n");
return -ENODEV;
}
} else {
dev_dbg(&client->dev, "No fujitsu board\n");
return -ENODEV;
}
data = devm_kzalloc(&client->dev, sizeof(struct fts_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
mutex_init(&data->update_lock);
mutex_init(&data->access_lock);
data->client = client;
dev_set_drvdata(&client->dev, data);
err = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
if (err < 0)
return err;
revision = err;
hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
"ftsteutates",
data,
fts_attr_groups);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
err = fts_watchdog_init(data);
if (err)
return err;
dev_info(&client->dev, "Detected FTS Teutates chip, revision: %d.%d\n",
(revision & 0xF0) >> 4, revision & 0x0F);
return 0;
}
/*****************************************************************************/
/* Module Details */
/*****************************************************************************/
static struct i2c_driver fts_driver = {
.driver = {
.name = "ftsteutates",
},
.id_table = fts_id,
.probe = fts_probe,
.remove = fts_remove,
};
module_i2c_driver(fts_driver);
MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>");
MODULE_DESCRIPTION("FTS Teutates driver");
MODULE_LICENSE("GPL");
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