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linux/drivers/hwmon/sch5636.c
Hans de Goede 0772a64079 hwmon: New driver sch5636 
This patch adds a new driver for SMSC SCH5636 Super I/O chips.
The chips include an embedded microcontroller for hardware monitoring
solutions, allowing motherboard manufacturers to create their own
custom hwmon solution based upon the SCH5636.

Currently the sch5636 driver only supports the Fujitsu Theseus SCH5636
based hwmon solution. The sch5636 driver runs a sanity check on
loading to ensure it is dealing with a Fujitsu Theseus and not with
another custom SCH5636 based hwmon solution.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-07-25 21:46:09 +02:00

540 lines
17 KiB
C
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/***************************************************************************
* Copyright (C) 2011 Hans de Goede <hdegoede@redhat.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. *
* *
* 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. *
***************************************************************************/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#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 "sch56xx-common.h"
#define DRVNAME "sch5636"
#define DEVNAME "theseus" /* We only support one model for now */
#define SCH5636_REG_FUJITSU_ID 0x780
#define SCH5636_REG_FUJITSU_REV 0x783
#define SCH5636_NO_INS 5
#define SCH5636_NO_TEMPS 16
#define SCH5636_NO_FANS 8
static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = {
0x22, 0x23, 0x24, 0x25, 0x189 };
static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = {
4400, 1500, 4000, 4400, 16000 };
static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = {
"3.3V", "VREF", "VBAT", "3.3AUX", "12V" };
static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = {
0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,
0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };
#define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i))
#define SCH5636_TEMP_WORKING 0x01
#define SCH5636_TEMP_ALARM 0x02
#define SCH5636_TEMP_DEACTIVATED 0x80
static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {
0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };
#define SCH5636_REG_FAN_CTRL(i) (0x880 + (i))
/* FAULT in datasheet, but acts as an alarm */
#define SCH5636_FAN_ALARM 0x04
#define SCH5636_FAN_NOT_PRESENT 0x08
#define SCH5636_FAN_DEACTIVATED 0x80
struct sch5636_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 */
u8 in[SCH5636_NO_INS];
u8 temp_val[SCH5636_NO_TEMPS];
u8 temp_ctrl[SCH5636_NO_TEMPS];
u16 fan_val[SCH5636_NO_FANS];
u8 fan_ctrl[SCH5636_NO_FANS];
};
static struct sch5636_data *sch5636_update_device(struct device *dev)
{
struct sch5636_data *data = dev_get_drvdata(dev);
struct sch5636_data *ret = data;
int i, val;
mutex_lock(&data->update_lock);
/* Cache the values for 1 second */
if (data->valid && !time_after(jiffies, data->last_updated + HZ))
goto abort;
for (i = 0; i < SCH5636_NO_INS; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_IN_VAL[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->in[i] = val;
}
for (i = 0; i < SCH5636_NO_TEMPS; i++) {
if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED)
continue;
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_TEMP_VAL[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->temp_val[i] = val;
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_TEMP_CTRL(i));
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->temp_ctrl[i] = val;
/* Alarms need to be explicitly write-cleared */
if (val & SCH5636_TEMP_ALARM) {
sch56xx_write_virtual_reg(data->addr,
SCH5636_REG_TEMP_CTRL(i), val);
}
}
for (i = 0; i < SCH5636_NO_FANS; i++) {
if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED)
continue;
val = sch56xx_read_virtual_reg16(data->addr,
SCH5636_REG_FAN_VAL[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->fan_val[i] = val;
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FAN_CTRL(i));
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->fan_ctrl[i] = val;
/* Alarms need to be explicitly write-cleared */
if (val & SCH5636_FAN_ALARM) {
sch56xx_write_virtual_reg(data->addr,
SCH5636_REG_FAN_CTRL(i), val);
}
}
data->last_updated = jiffies;
data->valid = 1;
abort:
mutex_unlock(&data->update_lock);
return ret;
}
static int reg_to_rpm(u16 reg)
{
if (reg == 0)
return -EIO;
if (reg == 0xffff)
return 0;
return 5400540 / reg;
}
static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
}
static ssize_t show_in_value(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = DIV_ROUND_CLOSEST(
data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index],
255);
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_in_label(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
return snprintf(buf, PAGE_SIZE, "%s\n",
SCH5636_IN_LABELS[attr->index]);
}
static ssize_t show_temp_value(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->temp_val[attr->index] - 64) * 1000;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_temp_fault(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_temp_alarm(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_fan_value(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = reg_to_rpm(data->fan_val[attr->index]);
if (val < 0)
return val;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_fan_fault(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static struct sensor_device_attribute sch5636_attr[] = {
SENSOR_ATTR(name, 0444, show_name, NULL, 0),
SENSOR_ATTR(in0_input, 0444, show_in_value, NULL, 0),
SENSOR_ATTR(in0_label, 0444, show_in_label, NULL, 0),
SENSOR_ATTR(in1_input, 0444, show_in_value, NULL, 1),
SENSOR_ATTR(in1_label, 0444, show_in_label, NULL, 1),
SENSOR_ATTR(in2_input, 0444, show_in_value, NULL, 2),
SENSOR_ATTR(in2_label, 0444, show_in_label, NULL, 2),
SENSOR_ATTR(in3_input, 0444, show_in_value, NULL, 3),
SENSOR_ATTR(in3_label, 0444, show_in_label, NULL, 3),
SENSOR_ATTR(in4_input, 0444, show_in_value, NULL, 4),
SENSOR_ATTR(in4_label, 0444, show_in_label, NULL, 4),
};
static struct sensor_device_attribute sch5636_temp_attr[] = {
SENSOR_ATTR(temp1_input, 0444, show_temp_value, NULL, 0),
SENSOR_ATTR(temp1_fault, 0444, show_temp_fault, NULL, 0),
SENSOR_ATTR(temp1_alarm, 0444, show_temp_alarm, NULL, 0),
SENSOR_ATTR(temp2_input, 0444, show_temp_value, NULL, 1),
SENSOR_ATTR(temp2_fault, 0444, show_temp_fault, NULL, 1),
SENSOR_ATTR(temp2_alarm, 0444, show_temp_alarm, NULL, 1),
SENSOR_ATTR(temp3_input, 0444, show_temp_value, NULL, 2),
SENSOR_ATTR(temp3_fault, 0444, show_temp_fault, NULL, 2),
SENSOR_ATTR(temp3_alarm, 0444, show_temp_alarm, NULL, 2),
SENSOR_ATTR(temp4_input, 0444, show_temp_value, NULL, 3),
SENSOR_ATTR(temp4_fault, 0444, show_temp_fault, NULL, 3),
SENSOR_ATTR(temp4_alarm, 0444, show_temp_alarm, NULL, 3),
SENSOR_ATTR(temp5_input, 0444, show_temp_value, NULL, 4),
SENSOR_ATTR(temp5_fault, 0444, show_temp_fault, NULL, 4),
SENSOR_ATTR(temp5_alarm, 0444, show_temp_alarm, NULL, 4),
SENSOR_ATTR(temp6_input, 0444, show_temp_value, NULL, 5),
SENSOR_ATTR(temp6_fault, 0444, show_temp_fault, NULL, 5),
SENSOR_ATTR(temp6_alarm, 0444, show_temp_alarm, NULL, 5),
SENSOR_ATTR(temp7_input, 0444, show_temp_value, NULL, 6),
SENSOR_ATTR(temp7_fault, 0444, show_temp_fault, NULL, 6),
SENSOR_ATTR(temp7_alarm, 0444, show_temp_alarm, NULL, 6),
SENSOR_ATTR(temp8_input, 0444, show_temp_value, NULL, 7),
SENSOR_ATTR(temp8_fault, 0444, show_temp_fault, NULL, 7),
SENSOR_ATTR(temp8_alarm, 0444, show_temp_alarm, NULL, 7),
SENSOR_ATTR(temp9_input, 0444, show_temp_value, NULL, 8),
SENSOR_ATTR(temp9_fault, 0444, show_temp_fault, NULL, 8),
SENSOR_ATTR(temp9_alarm, 0444, show_temp_alarm, NULL, 8),
SENSOR_ATTR(temp10_input, 0444, show_temp_value, NULL, 9),
SENSOR_ATTR(temp10_fault, 0444, show_temp_fault, NULL, 9),
SENSOR_ATTR(temp10_alarm, 0444, show_temp_alarm, NULL, 9),
SENSOR_ATTR(temp11_input, 0444, show_temp_value, NULL, 10),
SENSOR_ATTR(temp11_fault, 0444, show_temp_fault, NULL, 10),
SENSOR_ATTR(temp11_alarm, 0444, show_temp_alarm, NULL, 10),
SENSOR_ATTR(temp12_input, 0444, show_temp_value, NULL, 11),
SENSOR_ATTR(temp12_fault, 0444, show_temp_fault, NULL, 11),
SENSOR_ATTR(temp12_alarm, 0444, show_temp_alarm, NULL, 11),
SENSOR_ATTR(temp13_input, 0444, show_temp_value, NULL, 12),
SENSOR_ATTR(temp13_fault, 0444, show_temp_fault, NULL, 12),
SENSOR_ATTR(temp13_alarm, 0444, show_temp_alarm, NULL, 12),
SENSOR_ATTR(temp14_input, 0444, show_temp_value, NULL, 13),
SENSOR_ATTR(temp14_fault, 0444, show_temp_fault, NULL, 13),
SENSOR_ATTR(temp14_alarm, 0444, show_temp_alarm, NULL, 13),
SENSOR_ATTR(temp15_input, 0444, show_temp_value, NULL, 14),
SENSOR_ATTR(temp15_fault, 0444, show_temp_fault, NULL, 14),
SENSOR_ATTR(temp15_alarm, 0444, show_temp_alarm, NULL, 14),
SENSOR_ATTR(temp16_input, 0444, show_temp_value, NULL, 15),
SENSOR_ATTR(temp16_fault, 0444, show_temp_fault, NULL, 15),
SENSOR_ATTR(temp16_alarm, 0444, show_temp_alarm, NULL, 15),
};
static struct sensor_device_attribute sch5636_fan_attr[] = {
SENSOR_ATTR(fan1_input, 0444, show_fan_value, NULL, 0),
SENSOR_ATTR(fan1_fault, 0444, show_fan_fault, NULL, 0),
SENSOR_ATTR(fan1_alarm, 0444, show_fan_alarm, NULL, 0),
SENSOR_ATTR(fan2_input, 0444, show_fan_value, NULL, 1),
SENSOR_ATTR(fan2_fault, 0444, show_fan_fault, NULL, 1),
SENSOR_ATTR(fan2_alarm, 0444, show_fan_alarm, NULL, 1),
SENSOR_ATTR(fan3_input, 0444, show_fan_value, NULL, 2),
SENSOR_ATTR(fan3_fault, 0444, show_fan_fault, NULL, 2),
SENSOR_ATTR(fan3_alarm, 0444, show_fan_alarm, NULL, 2),
SENSOR_ATTR(fan4_input, 0444, show_fan_value, NULL, 3),
SENSOR_ATTR(fan4_fault, 0444, show_fan_fault, NULL, 3),
SENSOR_ATTR(fan4_alarm, 0444, show_fan_alarm, NULL, 3),
SENSOR_ATTR(fan5_input, 0444, show_fan_value, NULL, 4),
SENSOR_ATTR(fan5_fault, 0444, show_fan_fault, NULL, 4),
SENSOR_ATTR(fan5_alarm, 0444, show_fan_alarm, NULL, 4),
SENSOR_ATTR(fan6_input, 0444, show_fan_value, NULL, 5),
SENSOR_ATTR(fan6_fault, 0444, show_fan_fault, NULL, 5),
SENSOR_ATTR(fan6_alarm, 0444, show_fan_alarm, NULL, 5),
SENSOR_ATTR(fan7_input, 0444, show_fan_value, NULL, 6),
SENSOR_ATTR(fan7_fault, 0444, show_fan_fault, NULL, 6),
SENSOR_ATTR(fan7_alarm, 0444, show_fan_alarm, NULL, 6),
SENSOR_ATTR(fan8_input, 0444, show_fan_value, NULL, 7),
SENSOR_ATTR(fan8_fault, 0444, show_fan_fault, NULL, 7),
SENSOR_ATTR(fan8_alarm, 0444, show_fan_alarm, NULL, 7),
};
static int sch5636_remove(struct platform_device *pdev)
{
struct sch5636_data *data = platform_get_drvdata(pdev);
int i;
if (data->hwmon_dev)
hwmon_device_unregister(data->hwmon_dev);
for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++)
device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr);
for (i = 0; i < SCH5636_NO_TEMPS * 3; i++)
device_remove_file(&pdev->dev,
&sch5636_temp_attr[i].dev_attr);
for (i = 0; i < SCH5636_NO_FANS * 3; i++)
device_remove_file(&pdev->dev,
&sch5636_fan_attr[i].dev_attr);
platform_set_drvdata(pdev, NULL);
kfree(data);
return 0;
}
static int __devinit sch5636_probe(struct platform_device *pdev)
{
struct sch5636_data *data;
int i, err, val, revision[2];
char id[4];
data = kzalloc(sizeof(struct sch5636_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
mutex_init(&data->update_lock);
platform_set_drvdata(pdev, data);
for (i = 0; i < 3; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FUJITSU_ID + i);
if (val < 0) {
pr_err("Could not read Fujitsu id byte at %#x\n",
SCH5636_REG_FUJITSU_ID + i);
err = val;
goto error;
}
id[i] = val;
}
id[i] = '\0';
if (strcmp(id, "THS")) {
pr_err("Unknown Fujitsu id: %02x%02x%02x\n",
id[0], id[1], id[2]);
err = -ENODEV;
goto error;
}
for (i = 0; i < 2; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FUJITSU_REV + i);
if (val < 0) {
err = val;
goto error;
}
revision[i] = val;
}
pr_info("Found %s chip at %#hx, revison: %d.%02d\n", DEVNAME,
data->addr, revision[0], revision[1]);
/* Read all temp + fan ctrl registers to determine which are active */
for (i = 0; i < SCH5636_NO_TEMPS; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_TEMP_CTRL(i));
if (unlikely(val < 0)) {
err = val;
goto error;
}
data->temp_ctrl[i] = val;
}
for (i = 0; i < SCH5636_NO_FANS; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FAN_CTRL(i));
if (unlikely(val < 0)) {
err = val;
goto error;
}
data->fan_ctrl[i] = val;
}
for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) {
err = device_create_file(&pdev->dev,
&sch5636_attr[i].dev_attr);
if (err)
goto error;
}
for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) {
if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED)
continue;
err = device_create_file(&pdev->dev,
&sch5636_temp_attr[i].dev_attr);
if (err)
goto error;
}
for (i = 0; i < (SCH5636_NO_FANS * 3); i++) {
if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED)
continue;
err = device_create_file(&pdev->dev,
&sch5636_fan_attr[i].dev_attr);
if (err)
goto error;
}
data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
data->hwmon_dev = NULL;
goto error;
}
return 0;
error:
sch5636_remove(pdev);
return err;
}
static struct platform_driver sch5636_driver = {
.driver = {
.owner = THIS_MODULE,
.name = DRVNAME,
},
.probe = sch5636_probe,
.remove = sch5636_remove,
};
static int __init sch5636_init(void)
{
return platform_driver_register(&sch5636_driver);
}
static void __exit sch5636_exit(void)
{
platform_driver_unregister(&sch5636_driver);
}
MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_LICENSE("GPL");
module_init(sch5636_init);
module_exit(sch5636_exit);
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