[linux-2.6-block.git] / drivers / hwmon / i5500_temp.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/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/hwmon-sysfs.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

/*
 * Sysfs stuff
 */

/* Sensor resolution : 0.5 degree C */
static ssize_t temp1_input_show(struct device *dev,
				struct device_attribute *devattr, char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev->parent);
	long temp;
	u16 tsthrhi;
	s8 tsfsc;

	pci_read_config_word(pdev, REG_TSTHRHI, &tsthrhi);
	pci_read_config_byte(pdev, REG_TSFSC, &tsfsc);
	temp = ((long)tsthrhi - tsfsc) * 500;

	return sprintf(buf, "%ld\n", temp);
}

static ssize_t thresh_show(struct device *dev,
			   struct device_attribute *devattr, char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev->parent);
	int reg = to_sensor_dev_attr(devattr)->index;
	long temp;
	u16 tsthr;

	pci_read_config_word(pdev, reg, &tsthr);
	temp = tsthr * 500;

	return sprintf(buf, "%ld\n", temp);
}

static ssize_t alarm_show(struct device *dev,
			  struct device_attribute *devattr, char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev->parent);
	int nr = to_sensor_dev_attr(devattr)->index;
	u8 ctsts;

	pci_read_config_byte(pdev, REG_CTSTS, &ctsts);
	return sprintf(buf, "%u\n", (unsigned int)ctsts & (1 << nr));
}

static DEVICE_ATTR_RO(temp1_input);
static SENSOR_DEVICE_ATTR_RO(temp1_crit, thresh, 0xE2);
static SENSOR_DEVICE_ATTR_RO(temp1_max_hyst, thresh, 0xEC);
static SENSOR_DEVICE_ATTR_RO(temp1_max, thresh, 0xEE);
static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 0);
static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 1);

static struct attribute *i5500_temp_attrs[] = {
	&dev_attr_temp1_input.attr,
	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	NULL
};

ATTRIBUTE_GROUPS(i5500_temp);

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_groups(&pdev->dev,
							   "intel5500", NULL,
							   i5500_temp_groups);
	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");
Commit	Line	Data
c942fddf	1	// SPDX-License-Identifier: GPL-2.0-or-later
ada07281 JD	2	/*
	3	* i5500_temp - Driver for Intel 5500/5520/X58 chipset thermal sensor
	4	*
	5	* Copyright (C) 2012, 2014 Jean Delvare <jdelvare@suse.de>
ada07281 JD	6	*/
	7
	8	#include <linux/module.h>
	9	#include <linux/init.h>
	10	#include <linux/slab.h>
	11	#include <linux/jiffies.h>
b8d48ce9	12	#include <linux/device.h>
ada07281 JD	13	#include <linux/pci.h>
	14	#include <linux/hwmon.h>
	15	#include <linux/hwmon-sysfs.h>
	16	#include <linux/err.h>
	17	#include <linux/mutex.h>
	18
	19	/* Register definitions from datasheet */
	20	#define REG_TSTHRCATA 0xE2
	21	#define REG_TSCTRL 0xE8
	22	#define REG_TSTHRRPEX 0xEB
	23	#define REG_TSTHRLO 0xEC
	24	#define REG_TSTHRHI 0xEE
	25	#define REG_CTHINT 0xF0
	26	#define REG_TSFSC 0xF3
	27	#define REG_CTSTS 0xF4
	28	#define REG_TSTHRRQPI 0xF5
	29	#define REG_CTCTRL 0xF7
	30	#define REG_TSTIMER 0xF8
	31
ada07281 JD	32	/*
	33	* Sysfs stuff
	34	*/
	35
	36	/* Sensor resolution : 0.5 degree C */
3eb52cfd JL	37	static ssize_t temp1_input_show(struct device *dev,
3eb52cfd JL	38	struct device_attribute devattr, char buf)
ada07281	39	{
b8d48ce9	40	struct pci_dev *pdev = to_pci_dev(dev->parent);
ada07281 JD	41	long temp;
	42	u16 tsthrhi;
	43	s8 tsfsc;
	44
	45	pci_read_config_word(pdev, REG_TSTHRHI, &tsthrhi);
	46	pci_read_config_byte(pdev, REG_TSFSC, &tsfsc);
	47	temp = ((long)tsthrhi - tsfsc) * 500;
	48
	49	return sprintf(buf, "%ld\n", temp);
	50	}
	51
12211301	52	static ssize_t thresh_show(struct device *dev,
ada07281 JD	53	struct device_attribute devattr, char buf)
ada07281 JD	54	{
b8d48ce9	55	struct pci_dev *pdev = to_pci_dev(dev->parent);
ada07281 JD	56	int reg = to_sensor_dev_attr(devattr)->index;
	57	long temp;
	58	u16 tsthr;
	59
	60	pci_read_config_word(pdev, reg, &tsthr);
	61	temp = tsthr * 500;
	62
	63	return sprintf(buf, "%ld\n", temp);
	64	}
	65
12211301	66	static ssize_t alarm_show(struct device *dev,
ada07281 JD	67	struct device_attribute devattr, char buf)
ada07281 JD	68	{
b8d48ce9	69	struct pci_dev *pdev = to_pci_dev(dev->parent);
ada07281 JD	70	int nr = to_sensor_dev_attr(devattr)->index;
	71	u8 ctsts;
	72
	73	pci_read_config_byte(pdev, REG_CTSTS, &ctsts);
	74	return sprintf(buf, "%u\n", (unsigned int)ctsts & (1 << nr));
	75	}
	76
3eb52cfd	77	static DEVICE_ATTR_RO(temp1_input);
12211301 GR	78	static SENSOR_DEVICE_ATTR_RO(temp1_crit, thresh, 0xE2);
	79	static SENSOR_DEVICE_ATTR_RO(temp1_max_hyst, thresh, 0xEC);
	80	static SENSOR_DEVICE_ATTR_RO(temp1_max, thresh, 0xEE);
	81	static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 0);
	82	static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 1);
ada07281	83
86c725e3	84	static struct attribute *i5500_temp_attrs[] = {
ada07281 JD	85	&dev_attr_temp1_input.attr,
	86	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	87	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	88	&sensor_dev_attr_temp1_max.dev_attr.attr,
	89	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
	90	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
ada07281 JD	91	NULL
	92	};
	93
86c725e3	94	ATTRIBUTE_GROUPS(i5500_temp);
b8d48ce9	95
ada07281 JD	96	static const struct pci_device_id i5500_temp_ids[] = {
	97	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x3438) },
	98	{ 0 },
	99	};
	100
	101	MODULE_DEVICE_TABLE(pci, i5500_temp_ids);
	102
	103	static int i5500_temp_probe(struct pci_dev *pdev,
	104	const struct pci_device_id *id)
	105	{
	106	int err;
b8d48ce9	107	struct device *hwmon_dev;
e3d98203 JD	108	u32 tstimer;
e3d98203 JD	109	s8 tsfsc;
ada07281 JD	110
	111	err = pci_enable_device(pdev);
	112	if (err) {
	113	dev_err(&pdev->dev, "Failed to enable device\n");
b8d48ce9	114	return err;
ada07281 JD	115	}
ada07281 JD	116
e3d98203 JD	117	pci_read_config_byte(pdev, REG_TSFSC, &tsfsc);
	118	pci_read_config_dword(pdev, REG_TSTIMER, &tstimer);
	119	if (tsfsc == 0x7F && tstimer == 0x07D30D40) {
86c725e3	120	dev_notice(&pdev->dev, "Sensor seems to be disabled\n");
e3d98203 JD	121	return -ENODEV;
	122	}
	123
b8d48ce9 JD	124	hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
	125	"intel5500", NULL,
	126	i5500_temp_groups);
	127	return PTR_ERR_OR_ZERO(hwmon_dev);
ada07281 JD	128	}
	129
	130	static struct pci_driver i5500_temp_driver = {
	131	.name = "i5500_temp",
	132	.id_table = i5500_temp_ids,
	133	.probe = i5500_temp_probe,
ada07281 JD	134	};
ada07281 JD	135
aef64d0d	136	module_pci_driver(i5500_temp_driver);
ada07281 JD	137
	138	MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
	139	MODULE_DESCRIPTION("Intel 5500/5520/X58 chipset thermal sensor driver");
	140	MODULE_LICENSE("GPL");