149 lines
3.5 KiB
C
149 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* i5500_temp - Driver for Intel 5500/5520/X58 chipset thermal sensor
|
|
*
|
|
* Copyright (C) 2012, 2014 Jean Delvare <jdelvare@suse.de>
|
|
*/
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/device.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/hwmon.h>
|
|
#include <linux/err.h>
|
|
#include <linux/mutex.h>
|
|
|
|
/* Register definitions from datasheet */
|
|
#define REG_TSTHRCATA 0xE2
|
|
#define REG_TSCTRL 0xE8
|
|
#define REG_TSTHRRPEX 0xEB
|
|
#define REG_TSTHRLO 0xEC
|
|
#define REG_TSTHRHI 0xEE
|
|
#define REG_CTHINT 0xF0
|
|
#define REG_TSFSC 0xF3
|
|
#define REG_CTSTS 0xF4
|
|
#define REG_TSTHRRQPI 0xF5
|
|
#define REG_CTCTRL 0xF7
|
|
#define REG_TSTIMER 0xF8
|
|
|
|
static umode_t i5500_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
|
|
int channel)
|
|
{
|
|
return 0444;
|
|
}
|
|
|
|
static int i5500_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
|
|
long *val)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(dev->parent);
|
|
u16 tsthr;
|
|
s8 tsfsc;
|
|
u8 ctsts;
|
|
|
|
switch (type) {
|
|
case hwmon_temp:
|
|
switch (attr) {
|
|
/* Sensor resolution : 0.5 degree C */
|
|
case hwmon_temp_input:
|
|
pci_read_config_word(pdev, REG_TSTHRHI, &tsthr);
|
|
pci_read_config_byte(pdev, REG_TSFSC, &tsfsc);
|
|
*val = (tsthr - tsfsc) * 500;
|
|
return 0;
|
|
case hwmon_temp_max:
|
|
pci_read_config_word(pdev, REG_TSTHRHI, &tsthr);
|
|
*val = tsthr * 500;
|
|
return 0;
|
|
case hwmon_temp_max_hyst:
|
|
pci_read_config_word(pdev, REG_TSTHRLO, &tsthr);
|
|
*val = tsthr * 500;
|
|
return 0;
|
|
case hwmon_temp_crit:
|
|
pci_read_config_word(pdev, REG_TSTHRCATA, &tsthr);
|
|
*val = tsthr * 500;
|
|
return 0;
|
|
case hwmon_temp_max_alarm:
|
|
pci_read_config_byte(pdev, REG_CTSTS, &ctsts);
|
|
*val = !!(ctsts & BIT(1));
|
|
return 0;
|
|
case hwmon_temp_crit_alarm:
|
|
pci_read_config_byte(pdev, REG_CTSTS, &ctsts);
|
|
*val = !!(ctsts & BIT(0));
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static const struct hwmon_ops i5500_ops = {
|
|
.is_visible = i5500_is_visible,
|
|
.read = i5500_read,
|
|
};
|
|
|
|
static const struct hwmon_channel_info *i5500_info[] = {
|
|
HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
|
|
HWMON_CHANNEL_INFO(temp,
|
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | HWMON_T_CRIT |
|
|
HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM
|
|
),
|
|
NULL
|
|
};
|
|
|
|
static const struct hwmon_chip_info i5500_chip_info = {
|
|
.ops = &i5500_ops,
|
|
.info = i5500_info,
|
|
};
|
|
|
|
static const struct pci_device_id i5500_temp_ids[] = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x3438) },
|
|
{ 0 },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, i5500_temp_ids);
|
|
|
|
static int i5500_temp_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
int err;
|
|
struct device *hwmon_dev;
|
|
u32 tstimer;
|
|
s8 tsfsc;
|
|
|
|
err = pci_enable_device(pdev);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Failed to enable device\n");
|
|
return err;
|
|
}
|
|
|
|
pci_read_config_byte(pdev, REG_TSFSC, &tsfsc);
|
|
pci_read_config_dword(pdev, REG_TSTIMER, &tstimer);
|
|
if (tsfsc == 0x7F && tstimer == 0x07D30D40) {
|
|
dev_notice(&pdev->dev, "Sensor seems to be disabled\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, "intel5500", NULL,
|
|
&i5500_chip_info, NULL);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
static struct pci_driver i5500_temp_driver = {
|
|
.name = "i5500_temp",
|
|
.id_table = i5500_temp_ids,
|
|
.probe = i5500_temp_probe,
|
|
};
|
|
|
|
module_pci_driver(i5500_temp_driver);
|
|
|
|
MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
|
|
MODULE_DESCRIPTION("Intel 5500/5520/X58 chipset thermal sensor driver");
|
|
MODULE_LICENSE("GPL");
|